CENTAUR PHARMACEUTICALS INC
S-1/A, 1998-07-15
PHARMACEUTICAL PREPARATIONS
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<PAGE>
 
     
  AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON JULY 15, 1998     
                                                   
                                                REGISTRATION NO. 333-57165     
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
                      SECURITIES AND EXCHANGE COMMISSION
                            WASHINGTON, D.C. 20549
                                ---------------
                                
                             AMENDMENT NO. 1     
                                       
                                    TO     
                                   FORM S-1
                            REGISTRATION STATEMENT
                                     UNDER
                          THE SECURITIES ACT OF 1933
                                ---------------
                         CENTAUR PHARMACEUTICALS, INC.
            (EXACT NAME OF REGISTRANT AS SPECIFIED IN ITS CHARTER)
                                ---------------
         DELAWARE                    2384                    77-030431
     (STATE OR OTHER          (PRIMARY STANDARD           (I.R.S. EMPLOYER
     JURISDICTION OF              INDUSTRIAL             IDENTIFICATION NO.)
     INCORPORATION OR        CLASSIFICATION CODE
      ORGANIZATION)                NUMBER)
 
                              484 OAKMEAD PARKWAY
                          SUNNYVALE, CALIFORNIA 94086
                                (408) 822-1600
              (ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
       INCLUDING AREA CODE, OF REGISTRANT'S PRINCIPAL EXECUTIVE OFFICES)
 
                               JOSEPH L. TURNER
                            CHIEF FINANCIAL OFFICER
                         CENTAUR PHARMACEUTICALS, INC.
                              484 OAKMEAD PARKWAY
                          SUNNYVALE, CALIFORNIA 94086
                                (408) 822-1600
           (NAME, ADDRESS, INCLUDING ZIP CODE, AND TELEPHONE NUMBER,
                  INCLUDING AREA CODE, OF AGENT FOR SERVICE)
 
                                  COPIES TO:
         BARRY J. KRAMER, ESQ.                  STEPHAN HUTTER, ESQ.
        DAVID K. MICHAELS, ESQ.                  SHEARMAN & STERLING
           JODY HUCKO, ESQ.                  BOCKENHEIMER LANDSTRASSE 55
        JAMES M. HACKETT, ESQ.                 60325 FRANKFURT AM MAIN
          FENWICK & WEST LLP                      (49 69) 97107 230
         TWO PALO ALTO SQUARE
      PALO ALTO, CALIFORNIA 94306
            (650) 494-0600
                                ---------------
  APPROXIMATE DATE OF COMMENCEMENT OF PROPOSED SALE TO THE PUBLIC: As soon as
practicable after the effective date of this Registration Statement.
 
  If any of the securities being registered on this Form are to be offered on
a delayed or continuous basis pursuant to Rule 415 under the Securities Act of
1933, check the following box. [_]
 
  If this Form is filed to register additional securities for an offering
pursuant to Rule 462(b) under the Securities Act, check the following box and
list the Securities Act registration statement number of the earlier effective
registration statement for the same offering. [_]
 
  If this Form is a post-effective amendment filed pursuant to Rule 462(c)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]
 
  If this Form is a post-effective amendment filed pursuant to Rule 462(d)
under the Securities Act, check the following box and list the Securities Act
registration statement number of the earlier effective registration statement
for the same offering. [_]
 
  If delivery of the prospectus is expected to be made pursuant to Rule 434,
please check the following box. [_]
       
       
                                ---------------
  THE REGISTRANT HEREBY AMENDS THIS REGISTRATION STATEMENT ON SUCH DATE OR
DATES AS MAY BE NECESSARY TO DELAY ITS EFFECTIVE DATE UNTIL THE REGISTRANT
SHALL FILE A FURTHER AMENDMENT WHICH SPECIFICALLY STATES THAT THIS
REGISTRATION STATEMENT SHALL THEREAFTER BECOME EFFECTIVE IN ACCORDANCE WITH
SECTION 8(A) OF THE SECURITIES ACT OF 1933 OR UNTIL THE REGISTRATION STATEMENT
SHALL BECOME EFFECTIVE ON SUCH DATE AS THE COMMISSION, ACTING PURSUANT TO SAID
SECTION 8(A), MAY DETERMINE.
- -------------------------------------------------------------------------------
- -------------------------------------------------------------------------------
<PAGE>
 
                                    PART II
 
                    INFORMATION NOT REQUIRED IN PROSPECTUS
 
ITEM 13. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.
 
  The following table sets forth the costs and expenses to be paid by the
Company in connection with the sale of the shares of Common Stock being
registered hereby. All amounts are estimates except for the Securities and
Exchange Commission registration fee, the National Association of Securities
Dealers, Inc. filing fee and the Swiss Exchange listing fee.
 
<TABLE>
      <S>                                                               <C>
      Securities and Exchange Commission registration fee.............. $26,462
      Swiss Exchange listing fee.......................................     *
      National Association of Securities Dealers, Inc. filing fee......   9,470
      Accounting fees and expenses.....................................     *
      Legal fees and expenses..........................................     *
      Road show expenses...............................................     *
      Printing and engraving expenses..................................     *
      Blue sky fees and expenses.......................................     *
      Transfer agent and registrar fees and expenses...................     *
      Miscellaneous....................................................     *
                                                                        -------
          Total........................................................ $   *
                                                                        =======
</TABLE>
- --------
*  To be provided by amendment
 
ITEM 14. INDEMNIFICATION OF DIRECTORS AND OFFICERS.
 
  As permitted by the Delaware General Corporation Law, the Registrant's
Certificate of Incorporation includes a provision that eliminates the personal
liability of its directors for monetary damages for breach of fiduciary duty
as a director except for liability (i) for any breach of the director's duty
of loyalty to the corporation or its stockholders, (ii) for acts or omissions
not in good faith or that involve intentional misconduct or a knowing
violation of law, (iii) under Section 174 of the Delaware General Corporation
Law or (iv) for any transaction from which the director derived an improper
personal benefit.
 
  As permitted by Section 145 of the Delaware General Corporation Law, the
Bylaws of the Registrant provide that (i) the Registrant is required to
indemnify its directors and executive officers to the fullest extent permitted
by the Delaware General Corporation Law, (ii) the Registrant may indemnify its
other officers, employees and agents as set forth in the Delaware General
Corporation Law, (iii) to the fullest extent permitted by the Delaware General
Corporation Law, the Registrant is required to advance expenses, as incurred,
to its directors and executive officers in connection with a legal proceeding
(subject to certain exceptions), (iv) the rights conferred in the Bylaws are
not exclusive, (v) the Registrant is authorized to enter into indemnification
agreements with its directors, officers, employees and agents and (vi) the
Registrant may not retroactively amend its Bylaws provisions relating to
indemnity.
 
  The Registrant's policy is to enter into indemnity agreements with each of
its directors and executive officers. The indemnity agreements provide that
directors and executive officers will be indemnified and held harmless to the
fullest possible extent permitted by law including against all expenses
(including attorneys' fees), judgments, fines and settlement amounts paid or
reasonably incurred by them in any action, suit or proceeding, including any
derivative action by or in the right of the Registrant, on account of their
services as directors, officers, employees or agents of the Registrant or as
directors, officers, employees or agents of any other company or enterprise
when they are serving in such capacities at the request of the Registrant. The
Registrant will not be obligated pursuant to the agreements to indemnify or
advance expenses to an indemnified party with respect to proceedings or claims
(i) initiated by the indemnified party and not by way of defense, except with
respect to a proceeding authorized by the Board of Directors and successful
proceedings brought to enforce a right to indemnification under the Indemnity
Agreement, (ii) for any amounts paid in settlement of a proceeding unless the
Registrant consents to such settlement, (iii) on account of any suit in which
judgment is rendered
 
                                     II-1
<PAGE>
 
against the indemnified party for an accounting of profits made from the
purchase or sale by the indemnified party of securities of the Registrant
pursuant to the provisions of Section 16(b) of the Securities Exchange Act of
1934 and related laws, (iv) on account of conduct by a director which is
finally adjudged to have been in bad faith or conduct that the director did
not reasonably believe to be in, or not opposed to, the best interests of the
Registrant, (v) on account of any criminal action or proceeding arising out of
conduct that the director had reasonable cause to believe was unlawful or (vi)
if a final decision by a court having jurisdiction in the matter shall
determine that such indemnification is not lawful.
 
  The indemnity agreement also provides for contribution in certain situations
in which the Registrant and a director or executive officer are jointly liable
but indemnification is unavailable, such contribution to be based on the
relative benefits received and the relative fault of the Registrant and the
director or executive officer. Contribution is not allowed in connection with
a Section 16(b) judgment, an adjudication of bad faith or conduct that a
director or executive officer did not reasonably believe to be in, or not
opposed to, the best interests of the Registrant or a proceeding arising out
of conduct a director or executive officer had reasonable cause to believe was
unlawful.
 
  The indemnity agreement requires a director or executive officer to
reimburse the Registrant for all expenses advanced only to the extent it is
ultimately determined that the director or executive officer is not entitled,
under Delaware law, the Bylaws, the indemnity agreement or otherwise, to be
indemnified for such expenses. The indemnity agreement provides that it is not
exclusive of any rights a director or executive officer may have under the
Certificate of Incorporation, Bylaws, other agreements, any majority-in-
interest vote of the stockholders or vote of disinterested directors, the
Delaware law or otherwise.
 
  The indemnification provision in the Bylaws, and the indemnity agreements
entered into between the Registrant and its directors and executive officers,
may be sufficiently broad to permit indemnification of the Registrant's
executive officers and directors for liabilities arising under the Securities
Act of 1933, as amended (the "Securities Act").
 
  As authorized by the Registrant's Bylaws, the Registrant, with approval by
the Board, expects to purchase director and officer liability insurance.
 
  See also the undertakings set out in response to Item 17.
 
  Reference is made to the following documents filed as exhibits to this
Registration Statement regarding relevant indemnification provisions described
above and elsewhere herein:
 
<TABLE>   
<CAPTION>
                               DOCUMENT                          EXHIBIT NUMBER
                               --------                          --------------
      <S>                                                        <C>
      U.S. Underwriting Agreement...............................      1.01
      International Underwriting Agreement......................      1.02
      Registrant's Restated Certificate of Incorporation........      3.01
      Form of Registrant's Amended and Restated Certificate of
       Incorporation to be filed immediately following the
       offering.................................................      3.02
      Registrant's Bylaws.......................................      3.03
      Third Amended and Restated Investors' Rights Agreement,
       dated as of February 14, 1997............................      4.02
      Form of Indemnification Agreement.........................     10.05
</TABLE>    
 
                                     II-2
<PAGE>
 
ITEM 15. RECENT SALES OF UNREGISTERED SECURITIES.
 
  The following table sets forth information regarding all securities sold by
the Registrant since April 1, 1995.
 
<TABLE>
<CAPTION>
                                                                    AGGREGATE PURCHASE
                           DATE OF        TITLE OF       NUMBER OF   PRICE AND FORM OF
  CLASS OF PURCHASERS      SALE(S)      SECURITIES(1)    SECURITIES    CONSIDERATION
  -------------------     ---------- ------------------- ---------- -------------------
<S>                       <C>        <C>                 <C>        <C>
Neil Solomon and Andrew
Newcorn.................     2/15/96 Common Stock            2,730  Issued in
                                                                    connection with
                                                                    consulting services
                                                                    rendered

Prospektiva Investments.     8/12/96 Warrant to purchase    10,000  Issued in
                                     Common Stock at                connection with
                                     $3.00                          consulting services
                                                                    rendered
52 unaffiliated
purchasers and the
following purchasers
that were then officers,
directors and their
affiliates, and greater
than 5% stockholders:
Paul F. Glenn, Trustee,
Paul F. Glenn Revocable
Trust; Glenn Foundation
for Medical Research;
Brian D. Frenzel; Selvi   
Vescovi; Charter Ventures  
II, L.P.; Menlo Ventures
IV, L.P.; Oklahoma
Medical Research
Foundation; and Dillon,
Read & Co. Inc., as
agent...................  2/14/97 to Series D Preferred  2,200,000  $16,500,000 cash
                          10/3/97    Stock                                           

Prospektiva Investments.  9/19/97    Warrant to purchase    10,000  Issued in
                                     Common Stock at                connection with
                                     $3.00 per share                consulting services
                                                                    rendered

Hans-Jurg Buss..........  2/14/98    Warrant to purchase    10,000  Issued in
                                     Common Stock at                connection with
                                     $4.00 per share                consulting services
                                                                    rendered

Steinar Engelsen........  2/14/98    Warrant to purchase     5,000  Issued in
                                     Common Stock at                connection with
                                     $4.00 per share                consulting services
                                                                    rendered
131 officers, directors,
employees and/or          
consultants.............  4/1/95 to  Options to purchase 1,312,479  Options granted for  
                          4/30/98    Common Stock under             no cash              
                                     the 1993 Equity                consideration        
                                     Incentive Plan.                                     
                                     Exercise prices                                     
                                     range from $0.20 to                                 
                                     $6.50 per share.(2)                                  

23 officers, directors,
employees and/or          
consultants.............  4/1/95 to  Common Stock(3)       435,871  $81,826 cash (upon 
                          4/30/98                                   exercise of stock  
                                                                    options with       
                                                                    exercise prices    
                                                                    ranging from $0.10 
                                                                    to $2.50 per share) 
</TABLE>
- --------
(1) Unless otherwise noted, all sales were made in reliance on Section 4(2) of
    the Securities Act and/or Regulation D promulgated under the Securities
    Act. The securities were sold to a limited number of people with no
    general solicitation or advertising. The purchasers were sophisticated
    investors with access to all relevant information necessary to evaluate
    the investment who represented to the Registrant that the shares were
    being acquired for investment.
(2) With respect to the grant of stock options, exemptions from registration
    under the Securities Act were unnecessary in that none of such
    transactions involved a "sale" of securities as such term is used in
    Section 2(3) of the Securities Act.
(3) All sales of Common Stock pursuant to the exercise of stock options
    granted under the Registrant's stock option plan were made pursuant to the
    exemption from the registration requirements of the Securities Act
    afforded by Rule 701 promulgated under the Securities Act as transactions
    pursuant to a compensatory benefit plan or a written contract relating to
    compensation.
 
                                     II-3
<PAGE>
 
ITEM 16. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES.
 
  (a) The following exhibits are filed herewith:
 
<TABLE>   
<CAPTION>
  EXHIBIT
  NUMBER                               EXHIBIT TITLE
  -------                              -------------
 <C>       <S>
  1.01     --U.S. Underwriting Agreement.*
  1.02     --International Underwriting Agreement.*
  3.01     --Registrant's Restated Certificate of Incorporation.**
  3.02     --Form of Registrant's Amended and Restated Certificate of Incorpo-
              ration to be filed immediately following the offering.**
  3.03     --Registrant's Bylaws.**
  4.01     --Form of Specimen Certificate for Registrant's Common Stock.*
  4.02     --Third Amended and Restated Investors' Rights Agreement, dated as
              of February 14, 1997.**
  4.03     --Amendment to Third Amended and Restated Investors' Rights Agree-
              ment and Third Amended and Restated Voting Agreement and Approval
              of Election of Director, dated as of June 9, 1998.
  5.01     --Opinion of Fenwick & West LLP regarding legality of the securities
              being registered.*
 10.01     --Registrant's 1993 Equity Incentive Plan, as amended.**
 10.02     --Registrant's 1998 Equity Incentive Plan.**
 10.03     --Registrant's 1998 Directors Stock Option Plan.**
 10.04     --Registrant's 1998 Employee Stock Purchase Plan.**
 10.05     --Form of Indemnification Agreement entered into by Registrant with
              each of its directors and executive officers.**
 10.06     --Master Loan and Security Agreement between Registrant and Finova
              Technology Finance, Inc., dated as of November 3, 1997; Loan and
              Security Agreement No. 1 dated April 22, 1998 between Registrant
              and Finova Technology Finance, Inc.; Commitment Letter between
              the Registrant and Finova Technology Finance, Inc., dated as of
              October 7, 1997 (as revised on December 23, 1997), as amended
              April 20, 1998; Leasehold Deeds of Trust dated November 3, 1997
              executed by the Registrant; Promissory Note dated April 22, 1998
              executed by Registrant.**
 10.07     --Lease for 484 Oakmead Parkway, Sunnyvale, CA dated February 25,
              1993, as amended August 18, 1995.**
 10.08     --Sublease for additional space at 484 Oakmead Parkway, Sunnyvale,
              CA dated March 22, 1995.**
 10.09     --Lease for 1220 Memorex Drive, Suite 100, Santa Clara, CA dated
              February 12, 1997.**
 10.10     --Lease for 1220 Memorex Drive, Suites 200 and 300, Santa Clara, CA
              dated June 12, 1997.**
 10.11     --License with UKRF and OMRF dated July 15, 1992.+
 10.12     --First Amendment to License with UKRF and OMRF dated June 29,
              1995.+
 10.13     --Development, License and Marketing Agreement with Astra AB dated
              June 26, 1995.+
 10.14     --Supply Agreement with Astra AB dated June 26, 1995.+
 10.15     --Amendments to Development, License and Marketing Agreement with
              Astra AB dated July 8, 1997 and October 7, 1997.
 10.16     --Development, Patent and Trademark/Know-How Licensing and Supply
              Agreement-- CPI-1189 with H. Lundbeck A/S dated October 31, 1996,
              as amended as of October 31, 1996.+
 10.17     --Employment Agreement with Brian D. Frenzel dated December 1, 1993,
              and associated Stock Option Agreements.**
 10.18     --License Agreement dated January 15, 1998 between Registrant and
              Cutanix Corporation.+
</TABLE>    
 
                                      II-4
<PAGE>
 
<TABLE>   
<CAPTION>
  EXHIBIT
  NUMBER                            EXHIBIT TITLE
  -------                           -------------
 <C>       <S>
 10.19     --Services and Supply Agreement dated January 15, 1998 between
              Registrant and Cutanix Corporation.+
 23.01     --Consent of Fenwick & West LLP (included in Exhibit 5.01).*
 23.02     --Consent of Ernst & Young LLP, independent auditors.**
 24.01     --Power of Attorney (see Page II-6 of this Registration State-
              ment).**
 27.01     --Financial Data Schedule.**
</TABLE>    
- --------
*  To be supplied by amendment.
   
** Previously filed.     
   
+  Confidential treatment is being sought with respect to certain portions of
   this agreement. Such portions have been omitted from this filing and have
   been filed separately with the Securities and Exchange Commission.     
 
  (b) The following financial statement schedule is filed herewith:
 
                 Schedule II--Valuation and Qualifying Accounts
 
  Other financial statement schedules are omitted because the information
called for is not required or is shown either in the financial statements or
the notes thereto.
 
ITEM 17. UNDERTAKINGS.
 
  The undersigned Registrant hereby undertakes to provide to the Managers at
the closing specified in the Purchase Agreement certificates in such
denominations and registered in such names as required by the Managers to
permit prompt delivery to each purchaser.
 
  Insofar as indemnification for liabilities arising under the Securities Act
may be permitted to directors, officers and controlling persons of the
Registrant pursuant to the provisions described under Item 14 above, or
otherwise, the Registrant has been advised that in the opinion of the
Securities and Exchange Commission such indemnification is against public
policy as expressed in the Securities Act and is, therefore, unenforceable. In
the event that a claim for indemnification against such liabilities (other than
the payment by the Registrant of expenses incurred or paid by a director,
officer or controlling person of the Registrant in the successful defense of
any action, suit or proceeding) is asserted by such director, officer or
controlling person in connection with the securities being registered, the
Registrant will, unless in the opinion of its counsel the matter has been
settled by controlling precedent, submit to a court of appropriate jurisdiction
the question whether such indemnification by it is against public policy as
expressed in the Securities Act and will be governed by the final adjudication
of such issue.
 
  The undersigned Registrant hereby undertakes that:
 
    (1) For purposes of determining any liability under the Securities Act,
  the information omitted from the form of prospectus filed as part of this
  Registration Statement in reliance upon Rule 430A and contained in a form
  of prospectus filed by the Registrant pursuant to Rule 424(b)(1) or (4) or
  497(h) under the Securities Act shall be deemed to be part of this
  Registration Statement as of the time it was declared effective.
 
    (2) For the purpose of determining any liability under the Securities
  Act, each post-effective amendment that contains a form of prospectus shall
  be deemed to be a new registration statement relating to the securities
  offered therein, and the offering of such securities at that time shall be
  deemed to be the initial bona fide offering thereof.
 
                                      II-5
<PAGE>
 
                                  SIGNATURES
   
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT, THE REGISTRANT HAS DULY
CAUSED THIS AMENDMENT TO ITS REGISTRATION STATEMENT TO BE SIGNED ON ITS BEHALF
BY THE UNDERSIGNED, THEREUNTO DULY AUTHORIZED, IN THE CITY OF SUNNYVALE, STATE
OF CALIFORNIA, ON THE 14TH DAY OF JULY, 1998.     
 
                                          Centaur Pharmaceuticals, Inc.
 
                                                 /s/ Brian D. Frenzel
                                          By: _________________________________
                                               Brian D. FrenzelPresident and
                                                  Chief Executive Officer
                                                   
          
  PURSUANT TO THE REQUIREMENTS OF THE SECURITIES ACT, THIS AMENDMENT TO THE
REGISTRATION STATEMENT HAS BEEN SIGNED BY THE FOLLOWING PERSONS IN THE
CAPACITIES AND ON THE DATES INDICATED.     
 
 
<TABLE>   
<CAPTION>
                NAME                             TITLE                    DATE
                ----                             -----                    ----
Principal Executive Officer:
 
<S>                                  <C>                           <C>
      /s/ Brian D. Frenzel           President, Chief Executive      July 14, 1998
____________________________________  Officer and a Director
          Brian D. Frenzel
 
 
Principal Financial Officer and
Principal Accounting Officer:
 
                 *                   Chief Financial Officer,        July 14, 1998
____________________________________  Treasurer and Secretary
          Joseph L. Turner
</TABLE>    
 
 
Additional Directors:
 
<TABLE>   
<S>                                  <C>                           <C>
                 *                   Director                        July 14, 1998
____________________________________
           John M. Carney
 
                 *                   Director                        July 14, 1998
____________________________________
          Mark R. Collins
 
                 *                   Director                        July 14, 1998
____________________________________
          Graham K. Crooke
 
                 *                   Director                        July 14, 1998
____________________________________
         Charles R. Engles
 
                 *                   Director                        July 14, 1998
____________________________________
        Steinar J. Engelsen
 
                 *                   Director                        July 14, 1998
____________________________________
           Selvi Vescovi
 
  *By: /s/ Brian D. Frenzel
____________________________________
          Brian D. Frenzel
          Attorney-in-fact
</TABLE>    
 
                                     II-6
<PAGE>
 
                                 EXHIBIT INDEX
 
<TABLE>   
<CAPTION>
                                                                   SEQUENTIALLY
                                                                     NUMBERED
 EXHIBIT                       EXHIBIT TITLE                           PAGE
 -------                       -------------                       ------------
 <C>       <S>                                                     <C>
  1.01     --U.S. Underwriting Agreement.*
  1.02     --International Underwriting Agreement.*
  3.01     --Registrant's Restated Certificate of
              Incorporation.**
  3.02     --Form of Registrant's Amended and Restated
              Certificate of Incorporation to be filed
              immediately following the offering.**
  3.03     --Registrant's Bylaws.**
  4.01     --Form of Specimen Certificate for Registrant's
              Common Stock.*
  4.02     --Third Amended and Restated Investors' Rights
              Agreement, dated as of February 14, 1997.**
  4.03     --Amendment to Third Amended and Restated Investors'
              Rights Agreement and Third Amended and Restated
              Voting Agreement and Approval of Election of
              Director, dated as of June 9, 1998.
  5.01     --Opinion of Fenwick & West LLP regarding legality of
              the securities being registered.*
 10.01     --Registrant's 1993 Equity Incentive Plan, as
              amended.**
 10.02     --Registrant's 1998 Equity Incentive Plan.**
 10.03     --Registrant's 1998 Directors Stock Option Plan.**
 10.04     --Registrant's 1998 Employee Stock Purchase Plan.**
 10.05     --Form of Indemnification Agreement entered into by
              Registrant with each of its directors and
              executive officers.**
 10.06     --Master Loan and Security Agreement between
              Registrant and Finova Technology Finance, Inc.,
              dated as of November 3, 1997; Loan and Security
              Agreement No. 1 dated April 22, 1998 between
              Registrant and Finova Technology Finance, Inc.;
              Commitment Letter between the Registrant and
              Finova Technology Finance, Inc., dated as of
              October 7, 1997 (as revised on December 23, 1997),
              as amended April 20, 1998; Leasehold Deeds of
              Trust dated November 3, 1997 executed by the
              Registrant; Promissory Note dated April 22, 1998
              executed by Registrant.**
 10.07     --Lease for 484 Oakmead Parkway, Sunnyvale, CA dated
              February 25, 1993, as amended August 18, 1995.**
 10.08     --Sublease for additional space at 484 Oakmead
              Parkway, Sunnyvale, CA dated March 22, 1995.**
 10.09     --Lease for 1220 Memorex Drive, Suite 100, Santa
              Clara, CA dated February 12, 1997.**
 10.10     --Lease for 1220 Memorex Drive, Suites 200 and 300,
              Santa Clara, CA dated June 12, 1997.**
 10.11     --License with UKRF and OMRF dated July 15, 1992.+
 10.12     --First Amendment to License with UKRF and OMRF dated
              June 29, 1995.+
 10.13     --Development, License and Marketing Agreement with
              Astra AB dated June 26, 1995.+
 10.14     --Supply Agreement with Astra AB dated June 26,
              1995.+
 10.15     --Amendments to Development, License and Marketing
              Agreement with Astra AB dated July 8, 1997 and
              October 7, 1997.
 10.16     --Development, Patent and Trademark/Know-How
              Licensing and Supply Agreement-- CPI-1189 with H.
              Lundbeck A/S dated October 31, 1996, as amended as
              of October 31, 1996.+
 10.17     --Employment Agreement with Brian D. Frenzel dated
              December 1, 1993, and associated Stock Option
              Agreements.**
 10.18     --License Agreement dated January 15, 1998 between
              Registrant and Cutanix
              Corporation.+
</TABLE>    
<PAGE>
 
<TABLE>   
<CAPTION>
                                                                  SEQUENTIALLY
                                                                    NUMBERED
  EXHIBIT                      EXHIBIT TITLE                          PAGE
  -------                      -------------                      ------------
 <C>       <S>                                                    <C>
 10.19     --Services and Supply Agreement dated January 15,
              1998 between Registrant and Cutanix Corporation.+
 23.01     --Consent of Fenwick & West LLP (included in Exhibit
              5.01).*
 23.02     --Consent of Ernst & Young LLP, independent
              auditors.**
 24.01     --Power of Attorney (see Page II-6 of this
              Registration Statement).**
 27.01     --Financial Data Schedule.**
</TABLE>    
- --------
*  To be supplied by amendment.
   
** Previously filed.     
   
+  Confidential treatment is being sought with respect to certain portions of
   this agreement. Such portions have been omitted from this filing and have
   been filed separately with the Securities and Exchange Commission.     

<PAGE>
 
                                                                    EXHIBIT 4.03

          AMENDMENT TO THIRD AMENDED AND RESTATED INVESTORS' RIGHTS 
           AGREEMENT AND THIRD AMENDED AND RESTATED VOTING AGREEMENT
                     AND APPROVAL OF ELECTION OF DIRECTORS


     This Amendment is entered into as of June 9, 1998, by and between Centaur
Pharmaceuticals, Inc., a Delaware corporation (the "Company"), and those persons
                                                    -------                     
who are parties to those certain Third Amended and Restated Investors' Rights
Agreement and Third Amended and Restated Voting Agreement, each dated February
14, 1997.

                                    RECITALS

     A.  The Company has previously entered into a Third Amended and Restated
Investors' Rights Agreement dated February 14, 1997 (the "Investors' Rights
                                                          -----------------
Agreement") pursuant to which the Company agreed to provide certain information,
- ---------                                                                       
registration, first refusal and other rights to certain of the Company's
shareholders, and also agreed to not take certain actions without the approval
of a supermajority of the Company's Board of Directors.

     B.  The Company has also previously entered into a Third Amended and
Restated Voting Agreement dated February 14, 1997 (the "Voting Agreement")
                                                        ----------------  
pursuant to which the size of the Company's Board of Directors was set at seven
and the composition of the Board of Directors was divided up among various
shareholder groups.

     C.  The Company is contemplating a public offering of its shares to be
listed on the Swiss Stock Exchange, and in connection therewith desires to
assure that certain provisions of the Investors' Rights Agreement and the entire
Voting Agreement terminate in connection with such offering.

     D.  The Company has also previously agreed to amend the Investors' Rights
Agreement to provide that the holders of certain warrants to purchase a total of
25,000 shares of the Company's Common Stock will be entitled to certain
registration rights thereunder, and would like to take this opportunity to so
amend the Investors' Rights Agreement.

     E.  The Company also desires to appoint two new members to the Board of
Directors.

     NOW, THEREFORE, the parties hereto hereby agree as follows:

     1.  Termination of Certain Portions of Investors' Rights Agreement.  The
         --------------------------------------------------------------      
Company's obligations under Section 1 (information rights),  Section 3 (right of
first refusal) and Section 4.4 (restricted activities requiring Board approval)
of the Investors' Rights Agreement shall terminate upon the closing of the
Company's initial public offering of shares listed on the Swiss Stock Exchange.

     2.  Amendment of Registration Rights.  The Company is authorized to amend
         --------------------------------                                     
Section 2 of the Investors' Rights Agreement to provide that the Common Stock
issuable on exercise of certain warrants to purchase up to 25,000 shares of the
Company's Common Stock 
<PAGE>
 
shall have the same registration rights as are granted to other warrant holders
pursuant to such section.

     3.  Approval of Election of New Directors.  The election of Charles Engles,
         -------------------------------------                                  
Ph.D. and Steinar Engelsen, M.D. as directors of the Company is hereby approved.
It is agreed that the current Board of Directors shall consist of:


                         John Carney
                         Mark Collins
                         Graham Crooke
                         Steinar Engelsen
                         Charles Engles
                         Brian Frenzel
                         Selvi Vescovi

     4.  Termination of Voting Agreement.  The Voting Agreement shall terminate
         -------------------------------                                       
upon the closing of the Company's initial public offering of shares listed on
the Swiss Stock Exchange.

     5.  Miscellaneous.  All other provisions of the Investors' Rights Agreement
         -------------                                                          
and Voting Agreement, including, without limitation, any other provisions
relating to the termination of such agreements, shall remain in full force and
effect.


[SIGNATURE PAGES WITH SIGNATURES OF INVESTORS (IDENTIFIED AS EXHIBIT A TO THE 
THIRD AMENDED AND RESTATED INVESTORS' RIGHTS AGREEMENT ATTACHED AS EXHIBIT 4.02 
TO THE REGISTRATION STATEMENT) OMITTED]

                                       2

<PAGE>
 
                                                                     EXH 10.11


                              LICENSE AGREEMENT
                              -----------------
                                        
     This Agreement is made and entered into as of the 15th day of July, 1992,
by and among the OKLAHOMA MEDICAL RESEARCH FOUNDATION, an Oklahoma nonprofit
corporation ("OMRF"), 825 N.E. 13th Street, Oklahoma City, Oklahoma 73104; THE
              ----                                                            
UNIVERSITY OF KENTUCKY RESEARCH FOUNDATION, a Kentucky nonprofit corporation
("UKRF"), 120 graham avenue, Lexington, Kentucky 40506-0051 (OMRF and UKRF are
- ------                                                                        
hereinafter referred to together as "Licensors"); and CENTAUR PHARMACEUTICALS,
                                     ---------                                
INC., a delaware corporation ("Licensee"), having an office at 1250 coast
                               --------                                  
Village Road, Suite K, Santa Barbara, California 93108.

                                  RECITALS
                                        
     A.  Licensors own rights in and to technology relating to compositions of
and methods for using spin-trapping compounds developed or investigated by Dr.
John M. Carney of UKRF and/or Dr. Robert A. Floyd of OMRF, including the
Licensed Technology further described and defined below.

     B.  LICENSEE DESIRES TO OBTAIN THE RIGHT TO UTILIZE LICENSED TECHNOLOGY IN
ORDER TO MAKE, HAVE MADE, USE AND SELL LICENSED PRODUCTS (AS DEFINED BELOW).

     NOW, THEREFORE, for and in consideration of the foregoing and the mutual
covenants and agreements contained herein, the parties agree as follows:

1.   DEFINITIONS
     -----------

     As used herein:

     1.1  "LICENSED PATENTS" means:
           ----------------        

          (a)  United States Patent No. 5,025,032, titled "Phenyl Butyl Nitrone
               Compositions and Methods for Treatment of Oxidative Tissue
               Damage," issued June 18, 1991;

          (b)  United States Patent No. 5,036,097, titled "Phenylbutyl Nitrone
               Compositions and Methods for Prevention of Gastric Ulceration,"
               issued July 30, 1991;

          (c)  United States Patent Application No. [*]; and

          (d)  United States Patent Application No. [*];

- --------------------------------------------------------------------------------
[*] - Confidential treatment is being sought with respect to this portion of
      this agreement. This portion has been omitted from this filing and has
      been filed separately with the Securities and Exchange Commission.

                                       1
<PAGE>
 
          (e)  All patent applications and continuations-in-part presently
               contemplated by OMRF or UKRF relating to compositions of and
               methods for using spin-trapping compounds as evidenced by
               documented communications between Dr. Carney and/or Dr. Floyd and
               Kilpatrick and Cody, patent counsel for UKRF and OMRF;

and all divisionals, continuations, reexaminations, reissues, extensions and
foreign counterparts of these applications and patents and all patents and
comparable rights that issue thereon.


     1.2  "LICENSED TECHNOLOGY" means the Licensed Patents and all designs,
           -------------------                                             
technical information, know-how, knowledge, data, specifications, test results
and other information (including but not limited to designs, technical
information, know-how, knowledge, data, specifications, test results and other
information previously disclosed to Licensee) relating to the subject matter of
the Licensed Patents known to Licensors on the date of this Agreement.

     1.3  "LICENSED PROCESS" means any process which is covered in whole or in
           ----------------                                                   
part by an issued, unexpired claim or a pending claim contained in the Licensed
Patents in the country in which the process is practiced.

     1.4  "LICENSED PRODUCT(S)" means any product or part of a product which:
           ------------------                                                

          (a)  is covered in whole or in part by an issued, unexpired claim or a
               pending claim contained in the Licensed Patents in the country in
               which the product or part of a product is made, used or sold,

          (b)  is manufactured using a Licensed Process, or

          (c)  is used in a Licensed Process and has no substantial use except
               in a Licensed Process.

     1.5  "LICENSED TERRITORY" means the entire world.
           ------------------                         

     1.6  "SALE"/"SOLD" means the sale, transfer, exchange or other disposition
           -----------                                                         
of Licensed Products excluding (a) transfers of Licensed Products by Licensee to
                     ---------                                                  
its Affiliates; (b) transfers of Licensed Products for which Licensee receives
no more than nominal payment in connection with clinical testing in support of
efforts to obtain regulatory approvals to sell Licensed Products in the Licensed
Territory; and (c) all distribution of Licensed Products for promotional
purposes for which Licensee receives no more than nominal payment.  Sales of
Licensed Products shall be deemed consummated upon the later of recognition of
revenue or receipt of payment, by Licensee or its Sublicensees, as the case may
be, for such Sales of Licensed Products from the purchaser.

                                       2
<PAGE>
 
     1.7  "NET SELLING PRICE" of Licensed Products means the actual cash
           -----------------                                            
receipts of Licensee or its Sublicensees and, if applicable, the value of all
properties and services received in consideration of a Sale (as defined above)
of Licensed Products, less only:

          (a)  customary trade, quantity, or cash discounts actually allowed and
               taken;

          (b)  any freight or other transportation costs, insurance charges,
               import/export duties, tariffs or other excise taxes separately
               invoiced to and paid or reimbursed by the purchaser;

          (c)  returns which are accepted by Licensee or its Sublicensees from
               unrelated purchasers in accordance with their normal practice and
               for which Licensee or its Sublicensees give credit to such
               purchasers; and

          (d)  sales or use taxes which Licensee or its Sublicensees are under a
               legal obligation to pay;

provided, however, that where a Sale (as defined above) is deemed consummated by
- -----------------                                                               
the transfer or other disposition of Licensed Products for other than a selling
price stated in cash, the term "Net Selling Price" shall mean the average Net
Selling Price billed by Licensee or its Sublicensee, as the case may be, in
consideration of the Sale of comparable Licensed Products during the three (3)
month period immediately preceding such sale, without reduction of any kind.

     1.8  "LICENSEE'S AUDITORS" means the independent certified or chartered
           -------------------                                             
accountants regularly employed by Licensee to audit its accounts and certify its
financial statements.

     1.9  "PROPRIETARY INFORMATION" is defined in paragraph 9.1 of this
           -----------------------                                     
Agreement.

     1.10  "REQUIRED CONSENTS" is defined in paragraph 13.3 of this Agreement.
            -----------------                                                 

     1.11  "AGREEMENT" means this agreement including all Exhibits (if any)
            ---------                                                      
attached to this Agreement together with any written amendments of any of the
foregoing.

     1.12  "AFFILIATE" means any person, corporation or business entity that
            ---------                                                       
owns or controls Licensee, is under common control with Licensee or which is
owned or controlled by Licensee through ownership of a majority interest,
directly or indirectly, of the outstanding stock eligible to vote for the Board
of Directors or other similar governing body of the entity.

     1.13  "ANNUAL MINIMUM" is defined in Paragraph 4.1(d) of this Agreement.
            --------------                                                   

     1.14  "FDA" means the U.S. Food and Drug Administration.
            ---                                              

                                       3
<PAGE>
 
     1.15  "NDA" means a New Drug Application or its equivalent under then
            ---                                                           
applicable FDA regulations for the marketing of a human pharmaceutical Licensed
Product.

     1.16  "SUBLICENSEES" is defined in paragraph 2.3 of this Agreement.
            ------------                                                

     1.17  "SUBLICENSE INITIATION FEE" means any sublicense fee or nonrefundable
            -------------------------                                           
advance against royalties paid by a Sublicensee but does not include any payment
for research or other services or reimbursement of Licensee's expenses.

2.  GRANT OF LICENSEE
    -----------------

     2.1  LICENSE.  Subject to the license retained by Licensors in paragraph
          -------                                                            
2.2 below and the other terms of this Agreement, Licensors hereby grant to
Licensee the exclusive right and license to use the Licensed Technology to make,
have made, use, lease and sell Licensed Products and to practice the Licensed
Processes in the Licensed Territory during the term of this Agreement unless
sooner terminated as provided in this Agreement.

     2.2  RETAINED LICENSE.  Licensors retain the perpetual, royalty-free right
          ----------------                                                     
and license to practice the Licensed Technology solely for research and
educational purposes.

     2.3  SUBLICENSES.  Licensee shall have the right to sublicense the rights
          -----------                                                         
granted hereunder to third parties as well as to Affiliates of Licensee
(hereinafter collectively referred to as "Sublicenses") , provided that Licensee
                                          -----------     -------------         
promptly notifies Licensors of each such sublicense.  Any such sublicense will
survive termination of this Agreement only if Licensors approve the identity of
the Sublicensee in writing, either before or after Licensee's grant of the
sublicense.  Licensee may request Licensors' approval of a Sublicensee at any
time, and Licensors will not unreasonably withhold or delay such approval.

     2.4  SUBLICENSE OBLIGATIONS.  All sublicenses granted by Licensee shall
          ----------------------                                            
provide that the obligations to Licensors of Licensee under sections 5, 9, 11
and 12 of this Agreement shall be binding upon Sublicensee as if it were a party
to this Agreement.

     2.5  SUBLICENSES COPIES AND REPORTS.  Licensee shall provide to Licensors
          ------------------------------                                      
(1) a copy of all sublicense agreements promptly after execution, and (2)
annually, copies of all reports received by Licensee from its Sublicensees
during the preceding twelve (12) month period.

     2.6  NONCASH CONSIDERATION.  If Licensee receives from Sublicensees
          ---------------------                                         
anything of value in lieu of cash payments in satisfaction of payment of
obligations under the sublicense and this Agreement, then Licensee shall
determine the cash value of such consideration in good faith and shall pay
Licensors based on such cash value as set forth in Section 4.

     2.7  NO IMPLIED LICENSE. The license and right granted in this Agreement
          ------------------                                                 
shall not be construed to confer any rights upon Licensee by implication,
estoppel or otherwise as to any technology not specifically identified in this
Agreement as "Licensed Technology," nor shall it be construed to confer any
rights outside the Licensed Territory.

                                       4
<PAGE>
 
     2.8  FIRST RIGHT OF NEGOTIATION.  Licensee shall have the first right to
          --------------------------                                         
negotiate with Licensors to obtain a license to practice any patent Licensors
may acquire after the date of this Agreement that is dominated by one or more
patents included in the Licensed Patents on such terms and conditions that
Licensors and Licensee may agree through negotiations in good faith.  If
Licensee declines to exercise its right to negotiate or the parties have not
entered into a License within six (6) months after Licensors notify Licensee of
the existence of a patent subject to this paragraph, Licensors may negotiate
with and grant a License or other rights in such patent to others on terms
substantially no more favorable to such other party than were last offered by
Licensors to Licensee.

3.  DUE DILIGENCE
    -------------

     3.1  DILIGENCE.   Licensee shall use its reasonable efforts throughout the
          ---------                                                            
term of this Agreement to bring one or more Licensed Products to market through
a program for exploiting the right and license granted in this Agreement and for
creating, supplying and servicing a market for Licensed Products in the Licensed
Territory.

4.  ROYALTIES, PAYMENTS, STOCK AND REIMBURSEMENT
    --------------------------------------------

     4.1  AMOUNT OF PAYMENTS.  In partial consideration of the right and license
          ------------------                                                    
granted in the Agreement, Licensee shall pay to Licensors (by delivery to OMRF):

          (a)  upon execution of this Agreement, a payment in the amount of
               $4l,062.86 reimbursing expenses incurred by Licensors through May
               31, 1992, in preparing, filing, prosecuting and maintaining the
               Licensed Patents; plus

          (b)  a royalty equal to [*] of the Net Selling Price of Licensed
               Products Sold by or for Licensee and its Sublicensees; plus

          (c)  with respect to each sublicense under this Agreement, [*] of all
               Sublicense Initiation Fees paid to Licensee pursuant to such
               sublicense; plus

          (d)  in the event that Licensee's total annual royalty and sublicense
               payments to Licensors pursuant to the preceding subparagraphs
               4.1(b) and (c) during the calendar year following the year during
               which this Agreement becomes effective and each calendar year
               thereafter is less than the annual minimum set forth opposite
               such year below (the "Annual Minimum"), a payment to Licensors
                                     --------------                          
               together with the annual report required in paragraph 6.3 of this
               Agreement (or, if no such annual report is required, together
               with the quarterly report required in paragraph 6.1 of this
               Agreement 

                                       5
<PAGE>
 
               for the three (3) month period ending on December 31 of such
               calendar year) equal to the difference between such Annual
               Minimum and the total royalty and sublicense payments paid to
               Licensors for the preceding calendar year pursuant to
               paragraphs 4.1(b) and (c) above:

<TABLE>
<CAPTION>
     CALENDAR YEAR                              ANNUAL MINIMUM
     -------------                              --------------
   <S>   <C>                                    <C>
 
     O    First year                            None
     O    Second and each subsequent
           year through the year the FDA
           first approves an NDA                $ 25,000
     O    Each year after the year the
           FDA first approves an NDA            $100,000
</TABLE>

     4.2   NON-CUMULATIVE ROYALTIES.  Royalties shall be payable by Licensee
           ------------------------                                         
with respect to all of its or its Sublicensees' Sales except for Licensees'
resale of any products purchased from Licensors.  Royalties shall not become
payable at the time of sublicense or transfer from Licensee to its Sublicensees,
but shall become payable only when Licensee receives payment of royalties (after
recovery of any prepaid royalties included in any Sublicense Initiation Fee)
from its Sublicensee with respect to such Sublicensee's Sales.

     4.3  NO MULTIPLE ROYALTIES.  No multiple royalties shall be payable because
          ---------------------                                                 
any Licensed Product is covered by more than one patent within the Licensed
Patents.

     4.4  DEDUCTION OF TAXES.  Any income or other tax which Licensee is
          ------------------                                            
required to withhold and pay on behalf of Licensors with respect to the
royalties payable to Licensors under this Agreement shall be deducted from such
royalties prior to remittance to Licensors; provided, however, that in regard to
                                            --------  -------                   
any tax so deducted Licensee shall give Licensors such assistance as may
reasonably be necessary to enable Licensors to claim exemption therefrom.  In
each case Licensee shall furnish Licensors with proper evidence of the taxes so
paid on its behalf.

     4.5  INTEREST.  Royalty and other payments required in this Agreement
          --------                                                        
shall, if overdue, bear interest until payment at a per annum rate of two
percent (2%) above the prime rate in effect at the Chase Manhattan Bank, N.A.,
New York, New York, U.S.A., on the due date, but not more than the highest rate
permitted by law.  The payment of such interest shall not foreclose Licensors
from exercising any other rights they may have because any payment is late.

     4.6  CURRENCY CONVERSION AND DELIVERY.  All payments required in this
          --------------------------------                                
Agreement shall be paid in United States dollars, delivered in accordance with
paragraphs 6.2 and 13.9 of this Agreement or to such other place as Licensors
may reasonably designate consistent with the applicable laws and regulations in
any foreign country.  If any currency, conversion shall be required in
connection with the payment of royalties hereunder, such conversion shall be at

                                       6
<PAGE>
 
the rate in effect at the Chase Manhattan Bank, New York, New York, U.S.A., on
the last business day of the calendar quarterly reporting period to which such
payment(s) relate.

     4.7  STOCK.  In partial consideration of the right and license granted in
          -----                                                               
this Agreement, upon execution of this Agreement, Licensee shall procure
delivery to each of OMRF and UKRF Two Hundred Thousand (200,000) shares of fully
paid and nonassessable Common Stock of the Licensee (the  "Licensors' Shares").
                                                           -----------------    
Before receiving such common stock, OMRF and UKRF shall each execute and deliver
to Licensee an Investment Representation Letter in substantially the form of
Exhibit A attached hereto.
- ---------                

          (a)  Disposition of such Licensors' Shares by OMRF or UKRF will be
               subject to the terms of a right of first refusal held by Licensee
               as set forth in the Investment Representation Letter.

          (b)  In addition, OMRF and UKRF shall have until the later of (i) 30
               days after Licensee gives them written notice of a proposed
               offering or (ii) 20 days after Licensee gives them written notice
               of the principal terms of the offering to exercise a first
               refusal to purchase their respective prorata shares of any new
               securities offered by Licensee for cash to investors generally
               prior to Licensee's initial public offering, on substantially the
               same terms as are offered to such investors.  The respective pro
               rata shares of OMRF and UKRF will be determined by dividing the
               number of shares of common stock of Licensee then owned by each
               of them by the total number of shares of common stock of Licensee
               then outstanding (assuming in each case exercise of all options
               and warrants then outstanding and conversion to common stock of
               all convertible securities then outstanding or issuable upon
               exercise of outstanding options and warrants).  The right of
               first refusal referred to in this paragraph shall not apply to
               the issuance by Licensee of new securities of Licensee that are
               offered (i) as an incentive to any employee, officer, director or
               consultant of Licensee in connection with services rendered to or
               to be rendered to Licensee, (ii) in connection with any
               transaction in which the consideration to be received by Licensee
               for its securities is other than cash, (iii) in connection with
               any borrowing of funds or leasing of equipment by Licensee from a
               financial institution, or (iv) in connection with an acquisition
               of another company or any other property or assets.

     4.8  BOARD OF DIRECTORS.  At all times during the period beginning on the
          ------------------                                                  
date of this Agreement and ending on the earlier of (a) May 31, 1997 or (b) the
closing of Licensee's initial public offering pursuant to an effective
registration statement filed under the Securities Act of 1933, as amended,
covering the offer and sale of Common Stock for the account of Licensee,
provided that Licensors continue to hold all of the Licensors' Shares, Licensors
- -------- ----                                                                   
may designate, 

                                       7
<PAGE>
 
by their mutual agreement and with the consent of Licensee's Board of
Directors (such consent not to be unreasonably withheld or delayed), one (1)
member of Licensee's Board of Directors.

5.   RECORDS
     -------

     5.1  RECORD OF SALES.  Licensee shall at all times during the term of this
          ---------------                                                      
Agreement and for a period of-three (3) years after termination of this
Agreement keep at its principal place of business true and accurate records of
all Sales subject to Section 4 of this Agreement in such form and manner that
all royalties owed hereunder to Licensors may be readily and accurately
determined.  Such records shall be kept for a period of at least three (3) years
after the end of the royalty period to which they pertain and shall include, but
not by way of limitation, all information necessary for Licensee's Auditors to
prepare the reports required by Section 6 of this Agreement.

     5.2  INSPECTION.  Licensors shall have the right, from time to time, at
          ----------                                                        
reasonable times during normal business hours no later than three (3) years
after expiration or termination of this Agreement and at Licensors' expense, to
examine the records of Licensee through an independent certified public
accountant for the purpose of verifying the amounts owed to Licensors hereunder
and the accuracy of the reports furnished by Licensee under Section 6 of this
agreement.  Licensors and their accountant shall maintain the confidentiality of
all confidential information obtained from examination of Licensee's records and
shall use such information only for the purposes of this Agreement.

6.  REPORTS
    -------

     6.1  QUARTERLY REPORTS.  Licensee shall prepare and deliver to Licensors
          -----------------                                                  
within sixty (60) days after March 31, June 30, September 30 and December 31 of
each year during the term of this Agreement a true and accurate reports giving
such particulars of the business conducted by Licensee and its sublicensees
during the preceding three (3) month period as is required to calculate the
royalties due Licensors hereunder.  Such report shall include at least the
following:

          (a)  the total Net Selling Price of all Licensed Products Sold by
               Licensee and its Sublicensees during the preceding three (3)
               month period and for the calendar year to date;

          (b)  all Sublicense Initiation Fees received from Sublicensees during
               the preceding three (3) month period and for the calendar year to
               date; and

          (c)  the names and address of all new Sublicensees of Licensee since
               the previous report.

     6.2  PAYMENTS.  With each such report delivered, Licensee shall pay to
          --------                                                         
Licensors (by delivery to OMRF) all amounts due under this Agreement.  If no
payments are due, Licensee shall so report.

                                       8
<PAGE>
 
     6.3  AUDIT REPORT.  Within one hundred fifty (150) days after the end of
          ------------                                                       
each whole or partial fiscal year of Licensee in which Licensed Products are
Sold during the term of this Agreement, Licensee shall have its books and
records audited by Licensee's Auditors and shall direct them to prepare and
submit to Licensors certified financial statements for the preceding fiscal year
including, at a minimum, a balance sheet together with an operating statement
together with an audit report thereon.  Appropriate disclosure will be made in
the footnotes to Licensee's audited financial statements of (i) the total Sales
of Licensed Products by Licensee and its Sublicensees during the past year and
(ii) the amounts owed to Licensors in total at the year end balance sheet date.
If such disclosure is not made in the footnotes to Licensee's audited financial
statements, then Licensees Auditors shall prepare a special report covering
items (i) and (ii) above and submit it to Licensors.

7.  PATENT PROSECUTION
    ------------------

     7.1  Licensors shall apply for, seek prompt issuance of, and maintain
during the term of this Agreement the patents, patent applications and foreign
counterparts, as the case may be, included within the Licensed Patents that are
(a) specifically identified by patent number or application serial number in
paragraph 1.1 of this Agreement, or (b) timely identified or specified by
Licensee by notice to Licensors.  Except as provided in Section 7.4, the
prosecution and maintenance of all patent applications, foreign counterparts and
patents within the Licensed Patents shall be the primary responsibility of
Licensors; provided, however, that Licensee shall be afforded reasonable
           --------  -------                                            
opportunities to advise Licensors and shall cooperate with Licensors in such
prosecution and maintenance.

     7.2  Except as provided in Section 7.4. Licensee shall reimburse Licensors
for all reasonable out-of-pocket fees, costs and expenses reasonably paid or
incurred by Licensors in filing, prosecuting and maintaining the Licensed
Patents during the term of this Agreement.  Licensee shall deliver such
reimbursement to Licensors (or, if Licensors request, directly to Licensors'
patent counsel) within thirty (30) days after Licensors (or Licensors' patent
counsel) notify Licensee from time to time of the amount of such fees, costs and
expenses which have been paid or incurred by Licensors.

     7.3  Licensors shall promptly advise Licensee of the grant, lapse,
revocation, surrender, any threatened invalidation of or of their intention to
abandon any such patent, application or foreign counterparts.  If Licensors
advise Licensee of their intention not to pursue a patent on any Licensed
Technology or to abandon any such patent, application or foreign counterpart,
Licensee shall have the right, at its own expense, to pursue such patent,
application or foreign counterpart, and all rights resulting therefrom shall
vest in Licensee alone.

     7.4  Licensee shall designate each country if any, in which Licensee
desires that patent applications) corresponding to the Licensed Patents be
filed.  Licensee shall pay all costs and legal fees associated with the
preparation and filing of such designated foreign patent applications and such
applications shall be in Licensors' name.  Licensors may elect to file
corresponding patent applications in countries other than those designated by
Licensee, but in 

                                       9
<PAGE>
 
that event Licensors shall be responsible for all costs associated with such
non-designated filings. Licensors will notify Licensee that it intends to make
such filings. Licensee will then have thirty (30) days to decide to pay for
such filings and prosecutions. If it does not decide to pay for such
applications within the 30-day period, neither of such applications nor any
patents that issue thereon shall be considered to be Licensed Patents, and
Licensee shall forfeit its rights under this Agreement with respect to such
applications and patents.

8.  PATENT INFRINGEMENT
    -------------------

     8.1  NOTICE OF INFRINGEMENT.  Licensee shall promptly notify Licensors of
          ----------------------                                              
any alleged infringement of the Licensed Patents and of any available evidence
of such infringement.

     8.2  SUIT BY LICENSEE.  Licensee shall have the right, but shall not be
          ----------------                                                  
obligated, to commence suit for any infringement of the Licensed Patents, and
Licensors agree that Licensee may cause Licensors to join it as a party to any
such suit at no expense to Licensors.  The total cost of any such infringement
action commenced or defended solely by Licensee shall be borne by Licensee and
Licensee shall retain any recovery or damages awarded in such action, but such
recovery or damages shall be treated as Sales of Licensed Products, and Licensee
shall pay royalties thereon to Licensors in accordance with paragraph 4.1(b) of
this Agreement.  No settlement, consent judgment or other voluntary final
disposition of the suit may be entered into without the written consent of
Licensors, which consent shall not be unreasonably withheld.  Licensee shall
indemnify Licensors against any order for costs or award of sanctions that may
be made or entered against Licensors in such proceedings.

     8.3  SUIT BY LICENSORS.  If within six (6) months after notice by Licensee
          -----------------                                                    
to Licensors, or by one of Licensors to Licensee, of any alleged infringement,
Licensee has been unsuccessful in persuading the alleged infringer to desist and
has not brought an infringement action, or if Licensee notifies Licensors at any
time of its intention not to bring suit against an alleged infringer, then and
only then, Licensors shall have the right, but shall not be obligated, to
commence suit for such infringement at Licensors' sole expense, and Licensors
may, in such suit, use the name of Licensee as a nominal party.  No settlement,
consent judgment or other voluntary final disposition of the suit may be entered
into without the written consent of Licensee, which consent shall not be
unreasonably withheld.  Licensee shall not be responsible for any order for
costs or award of sanctions that may be made or entered against Licensee in such
proceedings.

     8.4  DEFENSE.  In the event that a declaratory judgment action alleging
          -------                                                           
invalidity, unenforceability or noninfringement of any of the Licensed Patents
shall be brought against Licensee, Licensors or either of them, Licensee shall
have the first right to defend such action; provided, however, that if Licensee
                                            --------  -------                  
determines at any time that it does not desire to defend such action, it shall
promptly so advise Licensors, and Licensors shall then have the right to defend
such action at Licensors' sole expense.  Licensee shall not be responsible for
any order for costs or award of sanctions that may be made or entered against
Licensee in such proceedings.

                                       10
<PAGE>
 
     8.5  COOPERATION.  In any suit either party may commence or defend pursuant
          -----------                                                           
to its rights under this Agreement in order to enforce or defend the valid or
enforceability of the Licensed Patents, the other party shall, at the reasonable
request and expense of the party initiating or defending such suit, reasonably
cooperate in all respects and, to the extent possible, have its employees
testify when requested and make available relevant records, papers, information,
samples, specimens and the like.

9.  CONFIDENTIALITY
    ---------------

     9.1  MAINTENANCE OF CONFIDENTIALITY.  No party shall, without the express
          ------------------------------                                      
written consent of the other parties to this Agreement in advance, for any
reason or at any time either during or for a period of three (3) years
subsequent to the term of this Agreement except as otherwise provided in this
paragraph, use (except in the course of practicing the licenses granted in this
Agreement) or disclose (except as is necessary in the course of sublicensing,
marketing or selling Licensed Products or obtaining governmental approval to do
so, or as is required to be disclosed pursuant to law (provided that the
receiving party uses reasonable efforts to give the disclosing party reasonable
notice of such required disclosure) as contemplated in this Agreement) to any
person (including without limitation any director, officer or employee of a
party who is not under an obligation of confidentiality substantially similar to
the obligation contained herein) the Licensed Technology or any other
information relating to the Licensed Products (hereinafter referred to as the
"Proprietary Information").  This obligation of non-use and non-disclosure shall
- ------------------------                                                        
not extend to Proprietary Information:

          (a)  which can be demonstrated by the receiving party to have been
               within its legitimate possession prior to the time of disclosure
               by the disclosing party;

          (b)  which was in the public domain prior to disclosure by the
               disclosing party, as evidenced by documents which were generally
               published prior to such disclosure;

          (c)  which, after disclosure by the disclosing party comes into the
               public domain through no fault of the receiving party; or

          (d)  which is disclosed, on the receiving party by a third party
               having legitimate possession thereof and the unrestricted right
               to make such disclosure.

     9.2  PRIOR AGREEMENTS.  The provisions of this Agreement supersede and
          ----------------                                                 
shall be substituted for any terms of any prior confidentiality agreement(s)
relating to the Proprietary Information between Licensee and either of the
Licensors which are not consistent with this Agreement.

                                       11
<PAGE>
 
10.  TERM AND TERMINATION
     --------------------

     10.1  DURATION.  Unless sooner terminated as otherwise provided in this
           --------                                                         
Agreement, the term of this Agreement shall commence upon the date hereof and
shall continue until the later of fifteen (15) years from the date hereof or the
date of expiration of the last to expire of the Licensed Patents, except that
                                                                  -----------
upon expiration of this Agreement at the end of such term, Licensee shall
automatically have a perpetual, paid-up, royalty-free license to use and
sublicense Licensed Technology without restriction.

     10.2  TERMINATION.  Licensors shall have the right to terminate this
           -----------                                                   
Agreement on the occurrence of any one or more of the following events:

          (a)  failure of Licensee to make any payment required pursuant to this
               Agreement when due;

          (b)  failure of Licensee to render reports to Licensors as required by
               this Agreement;

          (c)  the insolvency of Licensee;

          (d)  the institution of any proceeding by Licensee under any
               bankruptcy, insolvency or moratorium law;

          (e)  any assignment by Licensee of substantially all of its assets for
               the benefit of creditors;

          (f)  placement of Licensee's assets in the hands of a trustee or a
               receiver unless the receivership or trust is dissolved within
               thirty (30) days thereafter; or

          (g)  the material and intentional breach by Licensee of any other term
               of this Agreement.

     10.3  EXERCISE.  Licensors may exercise their right of termination by
           --------                                                       
giving Licensee, its trustees or receivers or assigns, sixty (60) days prior
written notice of Licensors' election to terminate.  Upon the expiration of such
period, this Agreement shall automatically terminate unless (a) the other party
has previously cured the breach or condition permitting termination under the
preceding paragraph or (b) such breach or condition cannot reasonably be cured
within sixty (60) days due to causes beyond Licensee's control, Licensee
commences good faith efforts to cure such breach within such 60-day period and
Licensee does cure the breach within one hundred twenty (120) days after the
expiration of such 60-day period, in which case this Agreement shall not
terminate.  Such notice and termination shall not prejudice Licensors' rights to
any royalties and other sums due hereunder and shall not prejudice any cause of
action or claim of Licensors accrued or to accrue on account of any breach or
default by Licensee.

                                       12
<PAGE>
 
     10.4  FAILURE TO ENFORCE.  The failure of Licensors at any time, or for any
           ------------------                                                   
period of time, to enforce any of the provisions of this Agreement shall not be
construed as a waiver of such provisions or the right of Licensors thereafter to
enforce each and every such provision.

     10.5  TERMINATION BY LICENSEE.  Licensee may terminate this Agreement at
           -----------------------                                           
any time giving Licensors six (6) months prior written notice of Licensee's
election to terminate.

     10.6  EFFECT.  In the event this Agreement is terminated prior to its
           ------                                                         
expiration for any reason whatsoever, Licensee shall not have any right to
return of any payments of any kind theretofore made by it to Licensors pursuant
to this Agreement; Licensee shall return, or at Licensor's direction destroy,
all plans, drawings, papers, notes, writings and other documents, samples,
organisms, biological materials and models constituting the Licensed Technology,
retaining no copies; and Licensee shall refrain from using or publishing any
portion of the Licensed Technology as provided in Section 9 of this Agreement.
Upon such termination of this Agreement, Licensee shall cease manufacturing,
processing, producing, using, selling or distributing Licensed Products;
provided, however that Licensee may continue to sell in the ordinary course of
- --------  -------                                                             
business for a period of one hundred eighty (180) days reasonable quantities of
Licensed Products which are fully manufactured and in Licensee's normal
inventory at the date of termination if:

          (a)  all monetary obligations of Licensee to Licensors have been
               satisfied and

          (b)  royalties on such sales are paid to Licensors in the amounts and
               in the manner provided in this Agreement.

Upon termination of this Agreement, any sublicenses granted by Licensee to
Sublicensees that have been approved by Licensor as contemplated by Section 2.3
and in which the Sublicensees are in full compliance, including without
limitation compliance with the obligations under Sections 5, 9, 11 and 12 of
this Agreement, shall continue in full force and effect with Licensors
substituted in Licensee's place.  The provisions of Section 9, 11 and 12 of this
Agreement shall remain in full force and effect notwithstanding any termination
of this Agreement.

11.  INDEMNIFICATION AND INSURANCE
     -----------------------------

     11.1  INDEMNIFICATION.  Licensee shall defend, indemnify and hold harmless
           ---------------                                                     
Licensors, the University of Kentucky, the University of Oklahoma and their
officers, directors, trustees and employees and all of their heirs, executors,
administrators and legal representatives ("Indemnitees") from and against any
                                           -----------                       
and all claims, demands, loss, liability, expense or damage (including
investigative costs, court costs and attorneys' fees) Indemnitees may suffer,
pay or incur as a result of claims, demands or actions against any of the
Indemnities arising or alleged to arise by reason of or in connection with any
and all personal injury, economic loss and property damage caused or alleged to
be caused or contributed to in whole or in part by the manufacture, use, lease,
sale or sublicense of Licensed Products by Licensee, whether asserted under a
tort or contractual theory or any other legal theory, including but not limited
to any and all claims, 

                                       13
<PAGE>
 
demands and actions in which it is alleged that: (1) an Indemnities negligence
or representations about the Licensed Products caused any defect in their
manufacture, design, labeling or performance or (2) any alleged infringement
of any patent, trademark or copyright, caused or contributed in whole or in
part to the personal injury, economic loss or property damage. Licensee's
obligations under this paragraph shall survive the expiration or termination
of this Agreement for any reason.

     11.2  INSURANCE.  Without limiting Licensee's indemnity obligations under
           ---------                                                          
the preceding paragraph, prior to testing any compounds in humans, Licensee
shall obtain a liability insurance policy which:

          (a)  insures Indemnitees for all claims, demands and actions mentioned
               in the preceding paragraph of this Agreement;

          (b)  includes a contractual endorsement providing coverage for all
               such liability which may be incurred by Indemnitees in connection
               with this Agreement;

          (c)  requires the insurance carrier to provide Licensors with no less
               than thirty (30) days written notice of any change in the terms
               of coverage of the policy or its cancellation; and

          (d)  provides Indemnitees with product liability coverage in the
               following amounts for the periods indicated below:

               (i)  $500,000 in product liability coverage during the period in
                    which one (1) or more Licensed Products are being used in
                    United States FDA clinical trials in human beings but no
                    Licensed Products are approved by FDA for use in human
                    beings;

               (ii) $2,500,000 in product liability coverage for each Licensed
                    Product approved by FDA for use in human beings;

          provided that the aggregate maximum amount of product liability
          -------- ----                                                  
          coverage for all Licensed Products at any time shall not exceed
          $10,000,000 combined single limit for bodily injury and property
          damage liability, subject to a deductible of not more than $100,000
          per occurrence.

Licensee shall maintain such liability insurance policy throughout the term of
this Agreement and for three (3) years thereafter.

     11.3  NOTICE OF CLAIMS.  Licensee will promptly notify Licensors  of all
           ----------------                                                  
claims involving Licensed Products.

                                       14
<PAGE>
 
     11.4  EVIDENCE OF INSURANCE.  Licensee shall provide Licensors with copies
           ---------------------                                               
of liability policies which comply fully with this Agreement during the entire
period Licensee is required to maintain such insurance.  If Licensee fails at
any time to maintain insurance as required in this Agreement, Licensors may (but
shall be under no obligation to) purchase their own policy providing all or any
of the coverage and recover from Licensee the cost thereof, which shall be
payable on demand.

     11.5  COMPLIANCE WITH SECURITIES LAWS.  Licensee shall use its reasonable
           -------------------------------                                    
efforts to ensure that any sales of its securities that shall be effected
subsequent to the date hereof shall only be made, and that any activities to
raise funds with which Licensee will satisfy any of its obligations to Licensors
hereunder will only be conducted, in compliance with all applicable laws,
including without limitation all applicable federal, state or foreign securities
laws.  Licensee shall retain independent legal counsel to advise Licensee with
respect to the liabilities and obligations arising out of, among other things,
the raising of funds by Licensee to fund its payment obligations to Licensors
hereunder and the offers or sales of securities by Licensee.  Such counsel shall
be experienced and competent in corporate and securities matters such as the
foregoing and shall be reasonably acceptable to Licensors.  It is understood and
agreed that current counsel to Licensee, Fenwick & West, is acceptable to
Licensors.

     11.6  INDEMNIFICATION BY LICENSEE.  Licensee shall indemnify and hold
           ---------------------------                                    
harmless Indemnitees against and with respect to all losses, damages, claims,
liabilities or expenses (including reasonable attorneys' fees and expenses)
incurred or sustained by any of them as a result of, or arising out of, any
violation breach or nonfulfillment on the part of licensee of any
representation, warranty, covenant or agreement made by Licensee pursuant to
this Agreement.  Licensors or another indemnified party hereunder shall notify
Licensee in writing promptly after it or they acquire actual knowledge of any
action or claim against it or them hereunder which may give rise to liability of
Licensee pursuant to this paragraph.  Licensee may, at its own expenses, through
legal counsel approved by Licensors, defend or settle any such claim or action,
provided that Licensee posts security that is adequate in the reasonable
discretion of Licensors to protect Licensor or the other indemnified party or
parties and provided Licensors are notified in writing of Licensee's intent to
so defend within ten (10) days after Licensee has been notified by Licensors or
such other indemnified party of such claim or action.

     11.7  CONTRIBUTION BY LICENSEE.  If the indemnification provided for in the
           ------------------------                                             
immediately preceding paragraph is unavailable or insufficient to hold harmless
an indemnified party in respect of any of the losses, claims, damages or
liabilities (or actions in respect thereof) referred to above, then Licensee
shall contribute to the amount paid or payable by each such indemnified party as
a result of such losses, claims, damages or liabilities (or actions in respect
thereof) in such proportion as is appropriate to reflect the relative benefits
received by Licensee on the one hand and Licensors and any other indemnified
parties on the other from the activities from which such losses, claims, damages
or liabilities arose, as well as the relative fault of Licensee on the one hand
and Licensors on the other in connection with the actions or inactions which
resulted in such losses, claims, damages or liabilities (or actions in respect
thereof) as well as any other relevant equitable considerations.

                                       15
<PAGE>
 
12.  MERCHANTABILITY, EXCLUSION OF WARRANTIES, LIMITATION OF DAMAGES AND
     -------------------------------------------------------------------
WARRANTIES
- ----------

     12.1  Licensee has made its own evaluation of the potential capabilities,
safety, utility and commercial application of the Licensed Technology, Licensed
Products and Licensed Processes.

          ACCORDINGLY, LICENSORS MAKE NO REPRESENTATION OR WARRANTY OF ANY KIND
          WITH RESPECT TO THE LICENSED TECHNOLOGY, LICENSED PRODUCTS OR LICENSED
          PROCESSES AND EXPRESSLY DISCLAIM ANY WARRANTIES OF MERCHANTABILITY OR
          FITNESS FOR A PARTICULAR PURPOSE AND ANY OTHER IMPLIED WARRANTIES WITH
          RESPECT TO THE CAPABILITIES, SAFETY, UTILITY OR COMMERCIAL APPLICATION
          OF LICENSED TECHNOLOGY LICENSED PRODUCTS AND LICENSED PROCESSES.

     12.2  LIMITATION OF LIABILITY.  LICENSORS SHALL NOT BE LIABLE FOR ANY
           -----------------------                                        
DIRECT, CONSEQUENTIAL OR OTHER DAMAGES SUFFERED BY LICENSEE OR ANY OTHER
RESULTING FROM THE USE OF THE LICENSED TECHNOLOGY, LICENSED PRODUCTS OR LICENSED
PROCESSES.

     12.3  REPRESENTATIONS AND WARRANTIES OF LICENSEE.  Licensee hereby makes
           ------------------------------------------                        
the following representations and warranties to Licensors, which representations
and warranties, together with all other representations and warranties of
Licensee in this Agreement, are true and correct on the date hereof;

          (a)  Licensee is a corporation duly organized, validly existing and in
               good standing under the laws of the State of Delaware and has all
               requisite corporate power and authority to enter into this
               Agreement and perform its obligations hereunder.

          (b)  Neither the execution or delivery of this Agreement, nor the
               consummation of the transactions contemplated herein, will (a)
               violate or conflict with any provision of the Certificate of
               Incorporation or By-laws of Licensee, as each may have been
               amended; (b) with or without the giving of notice or the lapse of
               time or both (i) result in a breach of, or violate, or be in
               conflict with or constitute a default under or result in the
               termination or cancellation of, or accelerate the performance
               required under, any security instrument, mortgage, note,
               debenture, indenture, loan, lease, contract, agreement or other
               instrument, to which Licensee is a party or by which it or any of
               its properties or assets may be bound or affected, or (ii) result
               in the loss or adverse modification of any lease, franchise,
               license or other contractual right or other 

                                       16
<PAGE>
 
               authorization granted to or otherwise held by Licensee; (c)
               require the consent of any party to any such agreement or
               commitment to which Licensee is a party or by which any of its
               properties or assets are bound; (d) result in the creation or
               imposition of any lien, claim or encumbrance upon any property
               or assets of Licensee; or (e) require any consent, approval,
               authorization, order, filing, registration or qualification of
               or with any court or governmental authority or arbitrator to
               which Licensee is subject or by which any of its properties or
               assets may be bound or affected.

          (c)  All actions to authorize the execution and delivery of this
               Agreement and the consummation of the transactions contemplated
               herein have been duly taken, and this Agreement constitutes the
               valid and binding obligation of Licensee enforceable in
               accordance with its terms.

          (d)  There are no claims (relating to patent infringement or any other
               matters), actions, suits, proceedings, arbitrations or
               investigations pending or, to the best of Licensee's knowledge,
               threatened, against Licensee which if adversely determined would
               adversely affect the Licensed Technology (or the patentability
               thereof) or other technology practiced by Licensee, or Licensee's
               ability to enter into or carry out this Agreement or use or
               license Licensed Technology.

     12.4  REPRESENTATIONS AND WARRANTIES OF OMRF.  OMRF hereby makes the
           --------------------------------------                        
following representations and warranties to Licensee, which representations and
warranties, together with all other representations and warranties of OMRF in
this Agreement, are true and correct on the date hereof;

          (a)  OMRF is a nonprofit corporation duly organized, validly existing
               and in good standing under the laws of the State of Oklahoma and
               has all requisite corporate power and authority to enter into
               this Agreement and perform its obligations hereunder.

          (b)  Neither the execution or delivery of this Agreement, nor the
               consummation of the transactions contemplated herein, will (a)
               violate or conflict with any provision of the Articles of
               Incorporation or By-laws of OMRF, as each may have been amended;
               (b) require the consent of any party to any agreement or
               commitment to which OMRF is a party or which affects the Licensed
               Technology; (c) result in the creation or imposition of any lien,
               claim or encumbrance upon the Licensed Technology; or (d) require
               any consent, approval, authorization, order, filing, registration
               or qualification of or with any court or governmental 

                                       17
<PAGE>
 
               authority or arbitrator to which OMRF is subject or by which
               the Licensed Technology may be affected.

          (c)  All actions to authorize the execution and delivery of this
               Agreement and the consummation of the transactions contemplated
               herein have been duly taken, and this Agreement constitutes the
               valid and binding obligation of OMRF enforceable in accordance
               with its terms.

          (d)  There are no claims (relating to patent infringement or any other
               matters), actions, suits, proceedings, arbitrations or
               investigations pending or, to the best of OMRF's knowledge,
               threatened, against OMRF which if adversely determined would
               adversely affect the Licensed Technology (or the patentability
               thereof) or OMRF's ability to enter into or carry out this
               Agreement.

     12.5  REPRESENTATION AND WARRANTIES OF UKRF.  UKRF hereby makes the
           -------------------------------------                        
following representations and warranties to Licensee, which representations and
warranties, together with all other representations and warranties of UKRF in
this Agreement, are true and correct on the date hereof;

          (a)  UKRF is a nonprofit corporation duly organized, validly existing
               and in good standing under the laws of the State of Kentucky and
               has all requisite corporate power and authority to enter into
               this Agreement and perform its obligations hereunder.

          (b)  Neither the execution or delivery of this Agreement, nor the
               consummation of the transactions contemplated herein, will (a)
               violate or conflict with any provision of the Articles of
               Incorporation or By-laws of UKRF, as each may have been amended;
               (b) require the consent of any party to any agreement or
               commitment to which UKRF is a party or which affects the Licensed
               Technology; (c) result in the creation or imposition of any lien,
               claim or encumbrance upon the Licensed Technology; or (d) require
               any consent, approval, authorization, order, filing, registration
               or qualification of or with any court or governmental authority
               or arbitrator to which UKRF is subject or by which the Licensed
               Technology may be affected.

          (c)  All action to authorize the execution and delivery of this
               Agreement and the consummation of the transactions contemplated
               herein have been duly taken, and this Agreement constitutes the
               valid and binding obligation of UKRF enforceable in accordance
               with its terms.

                                       18
<PAGE>
 
          (d)  There are no claims (relating to patent infringement or any other
               matters), actions, suits, proceedings, arbitrations or
               investigations pending or, to the best of UKRF's knowledge,
               threatened, against UKRF which if adversely determined would
               adversely affect the Licensed Technology (or the patentability
               thereof) or UKRF's ability to enter into or carry out this
               Agreement.

13.  MISCELLANEOUS AND GENERAL
     -------------------------

     13.1  EXPORT CONTROLS.  Licensee acknowledges that Licensors are subject to
           ---------------                                                      
United States laws and regulations controlling the export of technical data,
computer software, laboratory prototypes and other commodities and that its
obligations hereunder are contingent on compliance with all applicable United
States export and other laws and regulations.  The transfer of certain technical
data and commodities may require a license from the cognizant agency of the
United States Government and/or written assurances by Licensee that Licensee
shall not export data or commodities to certain foreign countries without prior
approval of such agency.  Licensors neither represent that a license shall not
be required nor that, if required, it shall be issued.

     13.2  LEGAL COMPLIANCE.  Licensee agrees that will comply with all
           ----------------                                            
applicable laws and regulations in relation to its manufacture, processing,
producing, use, selling or distributing of Licensed Products and that it will
not at any time take any action which would cause Licensors or Licensee to be in
violation of any of such applicable laws and regulations.

     13.3  REQUIRED CONSENTS.  Licensee shall obtain any and all licenses,
           -----------------                                              
permits, approvals or authorizations ("Required Consents") required by any
                                       -----------------                  
governmental entity or agency having jurisdiction over the transactions
contemplated by this Agreement.  Licensors shall cooperate with, and provide
reasonable assistance to, Licensee in obtaining the Required Consents; provided,
                                                                       ---------
however, the Licensee shall reimburse Licensors for all of Licensors' out-of-
- -------                                                                     
pocket expenses incurred in providing such assistance.

     13.4  INDEPENDENT CONTRACTOR.  Licensee's relationship to Licensors
           ----------------------                                       
hereunder shall be that of a licensee only.  Licensee shall not be the agent of
Licensors and shall have no authority to act for or on behalf of Licensors in
any matter.  Persons retained by Licensee as employees or agents shall not by
reason thereof be deemed to be employees or agents of Licensors.

     13.5  PATENT MARKING.  Licensee agrees to mark, to the extent practical,
           --------------                                                    
the Licensed Products sold in the United States with all applicable United
States patent numbers.  All Licensed Products shipped to or sold in other
countries shall be marked, to the extent practical, in such a manner as to
conform with the patent laws and practice of the country of manufacture or sale.

     13.6  USE OF NAMES.  No name of any party to this Agreement, or of any
           ------------                                                    
officer, trustee, director or employee of any party, may be used by any party in
any manner for announcing, advertising, promoting or marketing Licensed
Products, Licensed Processes or 

                                       19
<PAGE>
 
securities unless the written permission of such party, or the individual, as
the case may be, is obtained in advance.

     13.7  INTERPRETATION.  The parties are equally responsible for the
           --------------                                              
preparation of this Agreement, and in any judicial proceeding the terms hereof
shall not be more strictly construed against one party than the other.

     13.8  NOTICES.  All notices, statements and reports required or
           -------                                                  
contemplated herein by one party to the other shall be in writing and shall be
deemed to have been given upon delivery in person or upon the expiration of five
(5) days after deposit in a lawful mail depository in the country of residence
of the party giving the notice, registered or certified airmail postage prepaid,
and addressed as follows:

     If to Licensors:
     --------------- 

          OMRF:

               Attention: President
               Oklahoma Medical Research Foundation
               825 N.E. 13th Street
               Oklahoma City, Oklahoma 73104
               Facsimile:  (405) 271-3980

          With a copy to:

               John S. Pratt
               Kilpatrick & Cody
               1100 Peachtree Street
               Atlanta, Georgia  30309-4530
               Facsimile:  (404)  815-6555

          UKRF:

               Director
               Office of Intellectual Property
               University of Kentucky Research Foundation
               120 Graham Avenue
               Lexington, Kentucky 40506-0051

          With a copy to:

               Office of Legal Counsel
               University of Kentucky
               2 Administration Building
               Lexington, KY  40506-0032

                                       20
<PAGE>
 
     If to Licensee:
     -------------- 

               Attention: President
               Centaur Pharmaceuticals, Inc.
               1250 Coast Village Road
               Suite K
               Santa Barbara, CA  93108
               Facsimile:  (805) 565-5915

          With a copy to:

               Gordon K. Davidson
               Fenwick & West
               Two Palo Alto Square, Suite 800
               Palo Alto, CA  94306
               Facsimile:  (415) 857-0361

     Any party hereto may change the address to which notices to such party are
to be sent by giving notice to the other parties at the addresses and in the
manner provided above.  Any notice herein required or permitted to be given may
be given, in addition to the manner set forth above, by telex, facsimile or
cable, provided that the party giving such notice obtains acknowledgment by
telex, facsimile or cable that such notice has been received by the party or
parties to be notified.  Notice made in this manner shall be deemed to have been
given when such acknowledgment has been transmitted.

     13.9  ASSIGNMENTS AND INUREMENT.  Except as otherwise provided in this
           -------------------------                                       
Agreement, Licensee shall not grant, transfer, convey or otherwise assign any of
its rights or delegate any of its obligations under this Agreement (except in
the course of a merger, consolidation or acquisition of all or substantially all
of Licensee's business) without the prior written consent of Licensors, which
consent shall not be unreasonably withheld or delayed, and any attempt by
Licensee to do so shall be of no effect; however, this Agreement shall be
assignable by each of Licensors.  This Agreement shall be binding upon and inure
to the benefit of the successors and permitted assigns of the parties hereto.

     13.10  ENTIRE AGREEMENT.  This Agreement constitutes the entire agreement
            ----------------                                                  
between Licensors and Licensee with respect to the subject matter hereof and
shall not be modified, amended or terminated except as herein provided or
executed by another agreement in writing executed by the parties hereto.

     13.11  HEADINGS.  The section and paragraph headings are for convenience
            --------                                                         
only and are not a part of this Agreement.

     13.12  SEVERABILITY.  All rights and restrictions contained herein may be
            ------------                                                      
exercised and shall be applicable and binding only to the extent that they do
not violate any applicable laws and 

                                       21
<PAGE>
 
are intended to be limited to the extent necessary so that they will not
render this Agreement illegal, invalid or unenforceable. If any provision or
portion of any provision of this Agreement not essential to the commercial
purpose of this Agreement shall be held to be illegal, invalid or
unenforceable by a court of competent jurisdiction, it is the intention of the
parties that the remaining provisions or portions thereof shall constitute
their agreement with respect to the subject matter hereof, and all such
remaining provisions or portions thereof shall remain in full force and
effect. To the extent legally permissible, any illegal, invalid or
unenforceable provision of this Agreement shall be replaced by a valid
provision which will implement the commercial purpose of the illegal, invalid
or unenforceable provision. In the event that any provision essential to the
commercial purpose of this Agreement is held to be illegal, invalid or
unenforceable and cannot be replaced by a valid provision which will implement
the commercial purpose of this Agreement, this Agreement and the rights
granted herein shall terminate.

     13.13  COUNTERPARTS.  This Agreement may be executed in two or more
            ------------                                                
counterparts each of which shall be deemed an original, but all of which shall
constitute one and the same instrument.

                                       22
<PAGE>
 
     IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
by their duly authorized representatives as of the day and year first above
written.


                            LICENSORS:
                            --------- 

                         OKLAHOMA MEDICAL RESEARCH FOUNDATION

                            By:  /s/ William G. Thurman
                               -------------------------
                               Dr. William G. Thurman
                               President


                         UNIVERSITY OF KENTUCKY RESEARCH FOUNDATION

                            By: /s/ Linda J. Magid
                               ---------------------
                               Dr. Linda J. Magid
                               Executive Director


                            LICENSEE:
                            -------- 

                         CENTAUR PHARMACEUTICALS, INC.

                            By: /s/ John M. Carney
                               ---------------------
                               John M. Carney, Ph.D.
                               President


            SIGNATURE PAGE TO CENTAUR/OMRF/UKRF/LICENSE AGREEMENT
            -----------------------------------------------------
                                                                                

     ATTACHMENT:
     ---------- 

     Exhibit A         Investment Representation Letter

                                       23
<PAGE>
 
                                  EXHIBIT A
                                  ---------
                                        



                         ____________________, 1992



Centaur Pharmaceuticals, Inc.
1250 Coast Village Road, Suite K
Santa Barbara, CA 93108

                      INVESTMENT REPRESENTATION LETTER
                      --------------------------------
                                        
Ladies and Gentlemen:

     On this date, the undersigned ("Investor") has acquired from ___________,
                                     --------                                 
an individual residing at ________________________________________ ("Founder"),
                                                                     -------   
an aggregate of Two Hundred Thousand (200,000) shares of the Common Stock (the
"Shares") of Centaur Pharmaceuticals, Inc., a Delaware corporation (the
- -------                                                                
"Company") in a private transaction.
 -------                            

     1.  REPRESENTATIONS AND WARRANTIES OF INVESTOR.
         ------------------------------------------ 

     Investor represents and warrants to the Company that:

     (a) ACQUISITION FOR OWN ACCOUNT FOR INVESTMENT.  Investor is acquiring the
         ------------------------------------------                            
Shares for Investor's own account for investment purposes only and not with a
view to, or for sale in connection with, a distribution of the Shares within the
meaning of the Securities Act of 1933, as amended (the "1933 Act").  Investor
                                                        --------             
has no present intention of selling or otherwise disposing of all or any portion
of the Shares and no one other than Investor has any beneficial ownership of any
of the Shares.

     (b) ACCESS TO INFORMATION.  Investor has had access to all information
         ---------------------                                             
regarding the Company and its present and prospective business, assets,
liabilities and financial condition that Investor reasonably considers important
in making the decision to acquire the Shares, and Investor has had ample
opportunity to ask questions of the Company's representatives concerning such
matters and this investment.

     (c) UNDERSTANDING OF RISKS.  Investor is fully aware of: (i) the highly
         ----------------------                                             
speculative nature of the investment in the Shares; (ii) the financial hazards
involved; (iii) the lack of liquidity of the Shares and the restrictions on
transferability of the Shares (e.g., that Investor may not be able to sell or
                              -----                                          
dispose of the Shares or use them as collateral for loans and that the Shares
are subject to a right of first refusal in the Company); (iv) the qualifications
and backgrounds of 

                                       24
<PAGE>
 
the management of the Company; and (v) the tax consequences of investment in
the Shares. Investor agrees to be bound by the following restrictions on
transferability of the Shares:

          COMPANY'S RIGHT OF FIRST REFUSAL.  Before any Shares held by Oklahoma
          --------------------------------                                     
     Medical Research Foundation ("OMRF") or The University of Kentucky Research
                                   ----                                         
     Foundation ("UKRF") (OMRF and UKRF being sometimes referred to herein as
                  ----                                                       
     the "Holder") may be sold or otherwise transferred (including without
          ------                                                          
     limitation transfer by gift or operation of law, but excluding transfers
     between OMRF and UKRF), the Company shall have a right of first refusal to
     purchase the Shares on the terms and conditions set forth in this Section
     (the "Right of First Refusal").
           ----------------------   

               (a) NOTICE OF PROPOSED TRANSFER.  The Holder of the Shares shall
                   ---------------------------                                 
     deliver to the Company a written notice (the "Notice") stating (i) the
                                                   ------                  
     Holder's bona fide intention to sell or otherwise transfer such Shares;
     (ii) the name of each proposed purchaser or other transferee ("Proposed
                                                                    --------
     Transferee"); (iii) the number of Shares to be transferred to each Proposed
     ----------                                                                 
     Transferee; (iv) the bona fide cash price or other consideration for which
     the Holder proposes to transfer the Shares (the "Offered Price"); and (v)
                                                      -------------           
     that the Holder shall offer to sell the Shares at the Offered Price to the
     Company.

               (b) EXERCISE OF RIGHT OF FIRST REFUSAL.  At any time within 30
                   ----------------------------------                        
     days after receipt of the Notice, the Company may, by giving written notice
     to the Holder, elect to purchase all of the Shares proposed to be
     transferred to any one or more of the Proposed Transferees, at the purchase
     price determined in accordance with subsection (c) below.

               (c) PURCHASE PRICE.  The purchase price for Shares purchased
                   --------------                                          
     under this Section shall be the Offered Price.  If the Offered Price
     includes consideration other than cash, the cash equivalent value of the
     non-cash consideration shall be determined by the Board of Directors of the
     Company in good faith.

               (d) PAYMENT. Payment of the purchase price shall be made (i) in
                   -------                                                    
     cash (by check) within 60 days after receipt of the Notice, or (ii) in the
     manner and at the time(s) set forth in the Notice.

               (e) HOLDER'S RIGHT TO TRANSFER.  If all of the Shares proposed in
                   --------------------------                                   
     the Notice to be transferred to a given Proposed Transferee are not
     purchased by the Company and/or its assignee(s) as provided in this
     Section, then the Holder may sell or otherwise transfer such Shares to that
     Proposed Transferee at the Offered Price or at a higher price, provided
     that such sale or other transfer is consummated within 120 days after the
     date of the Notice and provided further that any such sale or other
     transfer is effected in compliance with any applicable securities laws.  If
     the Shares described in the Notice are not transferred to the Proposed
     Transferee within such period, a new Notice shall be given to the Company,
     and the Company shall again be offered the Right of First Refusal before
     any Shares held by the Holder may be sold or otherwise transferred.

                                       25
<PAGE>
 
               (f) TERMINATION OF RIGHT OF FIRST REFUSAL.  The Right of First
                   -------------------------------------                     
     Refusal shall terminate on the earlier of (i) 90 days after the first sale
     of common stock of the Company to the general public pursuant to a
     registration statement filed with and declared effective by the SEC, or
     (ii) on the tenth anniversary of the date of this Agreement.

     (d) INVESTOR'S QUALIFICATIONS.  Investor has a preexisting personal or
         -------------------------                                         
business relationship with the Company and/or certain of its officers and/or
directors of a nature and duration sufficient to make Investor aware of the
character, business acumen and general business and financial circumstances of
the Company and/or such officers and directors.  By reason of Investor's
business or financial experience, investor is capable of evaluating the merits
and risks of this investment, has the ability to protect Investor's own
interests in this transaction and is financially capable of bearing a total loss
of this investment.

     (e) NO GENERAL SOLICITATION.  At no time was Investor presented with or
         -----------------------                                            
solicited by any publicly issued or circulated newspaper, mail, radio,
television or other form of general advertising or solicitation in connection
with the offer and acquisition of the Shares.

     (f) COMPLIANCE WITH SECURITIES LAWS.  Investor understands and acknowledges
         -------------------------------                                        
that, in reliance upon the representations and warranties made by Investor
herein, among other things, the Shares are not being registered with the
Securities and Exchange Commission ("SEC") under the 1933 Act or with the
                                     ---                                 
securities administrator of any state, but instead are being transferred under
an exemption or exemptions from the registration and qualification requirements
of the 1933 Act and/or other applicable state securities laws which impose
certain restrictions on Investor's ability to transfer the Shares.

     (g) RESTRICTIONS ON TRANSFER.  Investor understands that Investor may not
         ------------------------                                             
transfer any Shares unless such Shares are registered under the 1933 Act or
qualified under applicable state securities laws unless, in the opinion of
counsel to the Company, exemptions from such registration and qualification
requirements are available.  Investor understands that only the Company may file
a registration statement with the SEC or securities administrators of the
various states and that the Company is under no obligation to do so with respect
to the Shares.  Investor has also been advised that exemptions from registration
and qualification may not be available or may not permit Investor to transfer
all or any of the Shares in the amounts or at the times proposed by Investor.

     (h) RULE 144.  In addition, Investor has been advised that SEC Rule 144
         --------                                                           
promulgated under the 1933 Act, which permits certain limited sales of
unregistered securities, is not presently available with respect to the Shares
and, in any event, requires that the Shares be held for a minimum of two years,
and in certain cases three years, after they have been acquired and paid for
                                                                ------------
(within the meaning of Rule 144), before they may be sold under Rule 144.
Investor understands that Rule 144 may indefinitely restrict transfer of the
Shares so long as Investor remains an "affiliate" of the Company and "current
public information" about the Company (as defined in Rule 144) is not publicly
available.

                                       26
<PAGE>
 
     2.  LEGENDS AND STOP-TRANSFER ORDERS.
         -------------------------------- 

     Investor understands that certificates or other instruments representing
any of the Shares acquired by Investor will bear legends substantially similar
to the following, in addition to any other legends required by federal or state
laws:

          THE SECURITIES REPRESENTED HEREBY HAVE NOT BEEN REGISTERED UNDER THE
          SECURITIES ACT OF 1933, AS AMENDED (THE "ACT"), OR UNDER THE
          SECURITIES LAWS OF CERTAIN STATES.  THESE SECURITIES ARE SUBJECT TO
          RESTRICTIONS ON TRANSFERABILITY AND RESALE AND MAY NOT BE TRANSFERRED
          OR RESOLD EXCEPT AS PERMITTED UNDER THE ACT AND APPLICABLE STATE
          SECURITIES LAWS, PURSUANT TO REGISTRATION OR EXEMPTION THEREFROM.
          INVESTORS SHOULD BE AWARE THAT THEY MAY BE REQUIRED TO BEAR THE
          FINANCIAL RISKS OF THIS INVESTMENT FOR AN INDEFINITE PERIOD OF TIME.
          THE ISSUER OF THESE SECURITIES MAY REQUIRE AN OPINION OF COUNSEL IN
          FORM AND SUBSTANCE SATISFACTORY TO THE ISSUER TO THE EFFECT THAT ANY
          PROPOSED TRANSFER OR RESALE IS IN COMPLIANCE WITH THE ACT AND ANY
          APPLICABLE STATE SECURITIES LAWS.

          THE SHARES REPRESENTED BY THIS CERTIFICATE ARE SUBJECT TO CERTAIN
          RESTRICTIONS ON PUBLIC RESALE, TRANSFER AND RIGHT OF FIRST REFUSAL
          OPTIONS HELD BY THE ISSUER OR ITS ASSIGNEE(S) AS SET FORTH IN AN
          INVESTMENT REPRESENTATION LETTER EXECUTED BY THE ORIGINAL HOLDER OF
          THESE SHARES, A COPY OF WHICH MAY BE OBTAINED AT THE PRINCIPAL OFFICE
          OF THE ISSUER.  SUCH PUBLIC SALE AND TRANSFER RESTRICTIONS AND THE
          RIGHT OF FIRST REFUSAL MAY BE BINDING ON TRANSFEREES OF THESE SHARES.

     The undersigned agrees that, in order to ensure and enforce compliance with
the restrictions imposed by applicable law and those referred to in the
foregoing legends, or elsewhere herein, the Company may issue appropriate "stop
transfer" instructions to its transfer agent, if any, with respect to any
certificate or other instrument representing the Shares, or if the Company
transfers its own securities, that it may make appropriate notations to the same
effect in the Company's records.

     3.  MARKET STANDOFF AGREEMENT.  Investor agrees in connection with any 
         -------------------------                     
registration of under the 1933 Act (other than Form S-8 or S-4) that, upon the
request of the underwriters managing any registered public offering of the
Company's securities, Investor will not sell or otherwise dispose of any
Shares without the prior written consent of the Company or 

                                       27
<PAGE>
 
such managing underwriters, as the case may be, for a period of time (not to
exceed 180 days) after the effective date of such registration requested by
such managing underwriters and subject to all restrictions as the Company or
the managing underwriters may specify for officer-shareholders generally.

     4.  TITLE.
         ----- 

         The exact spelling of the name(s) under which title to the Restricted
Securities will be taken is:

     ______________________________________________________________________

     ______________________________________________________________________

                         Very truly yours,

                         ______________________________ RESEARCH FOUNDATION

                Address: __________________________________________________

                         __________________________________________________

                         By: ______________________________________________

                         Name: ____________________________________________
                                 (Please Type or Print)

                         Title: ___________________________________________

                         Tax ID Number: ___________________________________

                                       28

<PAGE>
 
                                                                   EXHIBIT 10.12

                     FIRST AMENDMENT TO LICENSE AGREEMENT
                     ------------------------------------

     This First Amendment to License Agreement (the "FIRST AMENDMENT") is made
and entered into as of this 29th day of June, 1995, by and among the OKLAHOMA
MEDICAL RESEARCH FOUNDATION, an Oklahoma nonprofit corporation ("OMRF"), 825
N.E. 13th Street, Oklahoma City, OK 73104; THE UNIVERSITY OF KENTUCKY RESEARCH
FOUNDATION, a Kentucky nonprofit corporation ("UKRF"), 120 Graham Avenue,
Lexington, KY 40506-0051 (OMRF and UKRF are hereinafter collectively referred to
as "LICENSORS"); and CENTAUR PHARMACEUTICALS, INC., a Delaware corporation, 484
Oakmead Parkway, Sunnyvale, CA 94086 ("LICENSEE").

                                 RECITALS

     A.  Licensors and Licensee entered into a License Agreement dated as of
July 15, 1992 (the "AGREEMENT"), providing, in part, for an exclusive grant by
Licensors to Licensee of certain Licensed Technology in order to make, have
made, use and sell Licensed Products within the Licensed Territory.

     B.  Licensee and Astra AB, a Swedish corporation, S-151 85 Sodertalje,
Sweden ("ASTRA") have entered into a Development, License and Marketing
Agreement dated as of June 26, 1995 (the "ASTRA/CENTAUR AGREEMENT"), defining,
in part, a collaboration between Astra and Licensee in regard to the research,
development and marketing of Licensed Product.

     C.  UKRF and OMRF entered into Research Study Agreement(s) with Licensee
dated as of December 1, 1992 and February 1, 1993, respectively, with respect to
the conduct of an integrated, multi-part research program relating to the
synthesis and evaluation of certain anti-oxidant compounds (collectively and as
subsequently amended from time to time, the "RESEARCH AGREEMENTS").

     D.  Licensors and Licensee desire to amend and otherwise ratify the
Agreement pursuant to the provisions of this First Amendment.

     E.  All initially capitalized terms not otherwise defined in this First
Amendment shall have the meaning given in the Agreement.

- --------------------------------------------------------------------------------
[*] - Confidential treatment is being sought with respect to this portion of
      this agreement. This portion has been omitted from this filing and has
      been filed separately with the Securities and Exchange Commission.

                                      -1-
<PAGE>
 
     NOW, THEREFORE, for and in consideration of the foregoing and the mutual
covenants and agreements contained herein and for other good and valuable
consideration the receipt and legal sufficiency is hereby acknowledged, the
parties agree as follows:

     1.  LICENSED PATENTS.  The definition of "Licensed Patents" at paragraph
         ----------------                                                    
1.1 of the Agreement is hereby stricken in its entirety and the following
substituted therefor:

     1.1  "Licensed Patents" shall mean the United States and foreign patents
           ----------------                                                  
          and patent applications set forth below:

          (a)  United States Patent No. 5,025,032, titled "Phenyl Butyl Nitrone
               Compositions and Methods for Treatment of Oxidative Tissue
               Damage," issued June 18, 1991;

          (b)  United States Patent No. 5,036,097, titled "Phenylbutyl Nitrone
               Compositions and Methods for Prevention of Gastric Ulceration,"
               issued July 30, 1991;

          (c)  United States Patent No. 5,405,874, titled "PBN, DMPO, and POBN
               Compositions and Methods of Use Thereof for Inhibition of Age-
               Associated Oxidation," issued April 11, 1995;

          (d)  United States Patent Application No. [*]

          (e)  United States Patent Application No. 08/173,579, titled "2,4
               Disulfonyl PBN, Its Salts, and Their Use as Pharmaceuticals"
               filed ____________;

          (f)  United States Patent Application No. 08/011,968, titled "DMPO
               Spin-trapping Pharmaceutical Compositions and Methods of Use
               Thereof", filed February 1, 1993;

          (g)  All patents on inventions relating to the Licensed Technology
               made jointly, as determined under United States patent law
               relating to determination of inventorship, by one or more
               individuals in 

                                      -2-
<PAGE>
 
               each of the following two subparagraphs:

               (i)  One (1) or more employees of Licensee and/or Astra, and

               (ii) One (1) or more employees of either or both Licensors;

          (h)  All patent applications and continuations-in-part contemplated by
               OMRF or UKRF as of the date of the Agreement relating to
               compositions of and methods for using spin-trapping compounds as
               evidenced by documented communications between Dr. Carney and/or
               Dr. Floyd and Kilpatrick and Cody, patent counsel for UKRF and
               OMRF;

and all divisionals, continuations, reexaminations, reissues, extensions and
foreign counterparts of these applications and patents and all patents and
comparable rights that issue thereon.

2.  LICENSED TECHNOLOGY.  The definition of "Licensed Technology" at paragraph
    -------------------                                                       
1.2 of the Agreement is hereby stricken in its entirety and the following
substituted therefor:

     "1.2  "Licensed Technology" means collectively the
            -------------------                        

           (a)  Licensed Patents, and

           (b)  Licensed Process, and

           (c)  all designs, technical information, know-how, knowledge, data,
                specifications, test results and other information (including
                but not limited to designs, technical information, know-how,
                knowledge, data, specifications, test results and other
                information previously disclosed to Licensee) relating to the
                subject matter of the Licensed Patents or Licensed Process known
                to Licensors on the date of the Agreement."

3.  LICENSED PROCESS.  The definition of "Licensed Process" at paragraph 1.3 of
    ----------------                                                           
the Agreement is hereby stricken in its entirety and the following substituted
therefor:


    "1.3  "LICENSED PROCESS" means any existing or future process which is
           ----------------                                               
covered in whole or in part by an issued, unexpired claim or a pending claim
contained in the Licensed Patents in the country in which the process is
practiced."

                                      -3-
<PAGE>
 
4.  FIRST RIGHT OF NEGOTIATION.  Paragraph 2.8 of the Agreement is hereby
    --------------------------                                           
stricken in its entirety and the following substituted therefor:

    "2.8  FIRST RIGHT OF NEGOTIATION.  Licensee shall have the first right to
          --------------------------                                         
negotiate with Licensors to obtain a license to practice any patent Licensors
may acquire after the date of this Agreement (other than any patent included or
to be included within Licensed Patents) that is dominated by one or more patents
included in the Licensed Patents on such terms and conditions that Licensors and
Licensee may agree through negotiations in good faith.  If Licensee declines to
exercise its right to negotiate or the parties have not entered into a License
within six (6) months after Licensors notify Licensee of the existence of a
patent subject to this paragraph, Licensors may negotiate with and grant a
license or other rights in such patent to others (a "Third Party Grant") on
                                                     -----------------     
terms substantially no more favorable to such other party than were last offered
by Licensors to Licensee.  Notwithstanding any Third Party Grant, Licensors'
grant and license to Licensee (set forth at paragraph 2.1 of the Agreement)
shall continue as an exclusive right and license, and shall not be affected by
any Third Party Grant."


5.  ASTRA LICENSE AGREEMENT.  Licensee consents to the terms and conditions of
    -----------------------                                                   
the License Agreement dated June ___, 1995 by and between Licensors and Astra
and to the "License" granted therein to Astra by Licensors.

6.  RATIFICATION.  In all other respects, the parties do hereby ratify the
    ------------                                                          
remaining terms and provisions of the Agreement.

     IN WITNESS WHEREOF, the parties have caused this First Amendment to be
executed by their duly authorized representatives as of the day and year first
above written.

                                  Licensors:
                                  --------- 


                                  OKLAHOMA MEDICAL RESEARCH FOUNDATION



                                  By:  /s/ William G. Thurman
                                     -------------------------
                                     Dr. William G. Thurman, President

                                      -4-
<PAGE>
 
                                  UNIVERSITY OF KENTUCKY RESEARCH
                                  FOUNDATION



                                  By:  /s/ Del Collins
                                     -----------------
                                     Del Collins



                                  Licensee:
                                  -------- 


                                  CENTAUR PHARMACEUTICALS, INC.



                                  By:  /s/ Brian D. Frenzel
                                     ----------------------
                                     Brian D. Frenzel, President

                                      -5-

<PAGE>
 
                                                                   EXHIBIT 10.13


                 DEVELOPMENT, LICENSE AND MARKETING AGREEMENT



                                BY AND BETWEEN

                                   ASTRA AB
                                      AND
                         CENTAUR PHARMACEUTICALS, INC.
                              DATED JUNE 26, 1995
                                        























- --------------------------------------------------------------------------------
[*] - Confidential treatment is being sought with respect to this portion of
      this agreement. This portion has been omitted from this filing and has
      been filed separately with the Securities and Exchange Commission.

<PAGE>
 
<TABLE>
<S>   <C>                                                        <C>
1.    DEFINITIONS................................................   -2-
2.    GRANT......................................................   -7-
2.1   License Grant to ASTRA - ASTRA License.....................   -7-
(a)   Exclusive License..........................................   -8-
(b)   Co-Exclusive License.......................................   -8-
2.2   ASTRA Affiliates...........................................   -8-
2.3   License Grant to CENTAUR - CENTAUR Grant...................   -8-
2.4   CENTAUR Co-Promote Rights..................................   -8-
2.5   Oklahoma/Kentucky License..................................   -9-
2.6   Access to CENTAUR Technology...............................   -9-
3.    STEERING COMMITTEE AND DAY TO DAY
      MANAGEMENT OF THE PROJECT WORK.............................   -9-
3.1   Formation of Steering Committee............................   -9-
3.2   Meetings of the Steering Committee.........................   -9-
3.3   Steering Committee Review of Project Work..................   -9-
3.4   Steering Committee - Dispute Resolution....................  -10-
3.5   Project Groups.............................................  -10-
3.6   Third Persons..............................................  -10-
4.    RESEARCH WORK..............................................  -10-
4.1   Commencement and Completion of Research Work...............  -10-
4.2   R&D Plans..................................................  -10-
4.3   R&D Period.................................................  -11-
5.    FUNDING OF RESEARCH WORK...................................  -11-
5.1   Budgets....................................................  -11-
5.2   CENTAUR FTE................................................  -11-
5.3   ASTRA Payments of Annual Funding/Out-Of-Pocket
      Research Costs.............................................  -11-
5.4   Funding of R&D Periods - Annual Maximum....................  -12-
5.5   CENTAUR's Records..........................................  -12-
6.    DEVELOPMENT WORK...........................................  -12-
6.1   Development Work - ASTRA...................................  -12-
6.2   Development Work - CENTAUR.................................  -12-
6.3   Regulatory Approvals.......................................  -12-
6.4   Development of Licensed Product - Major Markets............  -13-
(a)   NDA Approval...............................................  -13-
(b)   First Commercial Sale......................................  -13-
6.5   Development of Licensed Product - Other Than
      Major Markets..............................................  -13-
6.6   ASTRA Non-Compliance.......................................  -13-
6.7   Notification of Development Work...........................  -14-
7.    REMUNERATION TO CENTAUR....................................  -14-
</TABLE>

                                      -i-
<PAGE>
 
<TABLE>
<S>   <C>                                                        <C>
7.1   Total Compensation to CENTAUR..............................  -14-
7.2   Payments...................................................  -14-
(a)   Effective Date.............................................  -14-
(b)   Selection of First CD of SP................................  -14-
(c)   Selection of First CD of AP................................  -14-
(d)   First SP IND in U.S........................................  -15-
(e)   First SP IND in EC Major Market or Japan...................  -15-
(f)   First AP IND in U.S........................................  -15-
(g)   First AP IND in EC Major Market or Japan...................  -15-
(h)   First SP Phase III Trial in U.S............................  -15-
(i)   First AP Phase III Trial in EC Major Markets or Japan......  -15-
(j)   First AP Phase III Trial in U.S............................  -15-
(k)   First AP Phase III Trial in EC Major Markets or Japan......  -15-
(l)   First SP NDA Filing in U.S.................................  -15-
(m)   First SP NDA Filing in EC Major Market or Japan............  -16-
(n)   First AP NDA Filing in U.S.................................  -16-
(o)   First AP NDA Filing in EC Major Market or Japan............  -16-
(p)   First SP NDA Approval in U.S...............................  -16-
(q)   First SP NDA Approval in EC Major Market or Japan..........  -16-
(r)   First AP NDA Approval in U.S...............................  -16-
(s)   First AP NDA Approval in EC Major Market or Japan..........  -16-
7.3   Net Sales Royalty..........................................  -16-
(a)   Countries Where CENTAUR Patents are Effective..............  -16-
(b)   Countries Where CENTAUR Patents Inapplicable...............  -17-
7.4   CENTAUR Default/Bankruptcy.................................  -17-
7.5   Termination of CENTAUR Royalty - ASTRA Paid Up License.....  -17-
7.6   Third Party Royalties on Sales of Licensed Product.........  -17-
7.7   Computation and Payment of Royalty to CENTAUR..............  -17-
7.8   ASTRA Records..............................................  -18-
7.9   CENTAUR Audit..............................................  -18-
8.    OPTION TO CO-PROMOTE IN THE U.S............................  -18-
8.1   Notification to Co-Promote.................................  -18-
8.2   Election of Co-Promotion Rights............................  -18-
(a)   Co-Promote Market Plan.....................................  -18-
(b)   CENTAUR Medical Representatives............................  -19-
(c)   Co-Promote Profits.........................................  -19-
8.3   Co-Promote Term............................................  -20-
9.    EXCHANGE OF INFORMATION....................................  -20-
9.1   Communication of Information...............................  -20-
10.   REPRESENTATIONS AND WARRANTIES.............................  -20-
10.1  General Representations....................................  -20-
</TABLE>                                                        
                                                           
                                     -ii-                       
<PAGE>
 
<TABLE>
<S>   <C>                                                        <C>
(a)   Duly Organized.............................................  -20-
(b)   Due Execution..............................................  -20-
(c)   No Third Party Approval....................................  -21-
(d)   Binding Agreement..........................................  -21-
(e)   Governmental Status........................................  -21-
(f)   Full Disclosure............................................  -21-
10.2  CENTAUR Representations....................................  -21-
11.   PUBLICATIONS...............................................  -22-
11.1  Disclosure of Know-How.....................................  -22-
11.2  Use of Other Party's Name..................................  -22-
12.   MARKETING OF LICENSED PRODUCT..............................  -22-
12.1  ASTRA's Commercialization of Licensed Product..............  -22-
12.2  Labeling...................................................  -22-
13.   INVENTION, IMPROVEMENTS AND DISCOVERIES....................  -23-
13.1  Ownership of Technology....................................  -23-
14.   PATENTS AND PATENT APPLICATIONS............................  -23-
14.1  Maintenance of CENTAUR Patents.............................  -23-
14.2  CENTAUR New Inventions Patents.............................  -23-
14.3  Joint Patents..............................................  -24-
(a)   Joint Patent - ASTRA Default or Bankruptcy.................  -24-
(b)   Joint Patent - CENTAUR Default or Bankruptcy...............  -24-
14.4  Notification With Respect to Patents.......................  -25-
14.5  CENTAUR's Election.........................................  -25-
14.6  ASTRA's Election...........................................  -25-
14.7  Minimum Patent Protection..................................  -25-
15.   PATENT INFRINGEMENTS.......................................  -26-
15.1  Notification of Alleged Patent Infringement................  -26-
15.2  Third Party Claims.........................................  -26-
15.3  Payment of Additional Third Party Royalties................  -26-
15.4  Infringement of CENTAUR Patents/Joint Patents/
      New Inventions Patents.....................................  -26-
15.5  Monetary Recovery - ASTRA Prosecution......................  -27-
15.6  Monetary Recovery - CENTAUR Prosecution....................  -27-
16.   CONFIDENTIALITY............................................  -27-
16.1  Treatment of Confidentiality...............................  -27-
16.2  Release from Restrictions..................................  -27-
17.   TRADEMARK..................................................  -28-
18.   EXCLUSIVITY AND OPTION TO EXTEND THE LICENSE...............  -28-
18.1  Restrictions...............................................  -28-
18.2  ASTRA Right of First Negotiation...........................  -28-
19.   WARRANTY DISCLAIMER........................................  -29-
</TABLE>

                                     -iii-
<PAGE>
 
<TABLE>
<S>   <C>                                                        <C>
19.1  Disclaimer by Parties......................................  -29-
(a)   CENTAUR Technology/Product Know-How........................  -29-
(b)   Third Party Infringement...................................  -29-
(c)   Prosecution................................................  -29-
(d)   Use of Name/Trademark......................................  -29-
(e)   CENTAUR Limitation.........................................  -29-
(f)   ASTRA Limitation...........................................  -29-
20.   TERM AND TERMINATION.......................................  -30-
20.1  Term.......................................................  -30-
20.2  Default....................................................  -30-
20.3  Insolvency or Bankruptcy...................................  -30-
20.4  Special Termination Provisions.............................  -31-
20.5  Effect of Termination of License Agreement.................  -31-
(a)   Existing Obligations.......................................  -31-
(b)   Expiration of Term or CENTAUR Default or Bankruptcy........  -31-
(c)   Expiration of Term or ASTRA Default or Breach..............  -31-
21.   MISCELLANEOUS PROVISIONS...................................  -32-
21.1  No Partnership.............................................  -32-
21.2  Assignments................................................  -32-
21.3  Force Majeure..............................................  -32-
21.4  No Trademark Rights........................................  -33-
21.5  Public Announcements.......................................  -33-
21.6  Entire Agreement of the Parties and Amendment..............  -33-
21.7  Severability...............................................  -33-
21.8  Captions...................................................  -34-
21.9  Notice and Delivery........................................  -34-
21.10 Limitation of Liability....................................  -34-
21.11 ASTRA Indemnification......................................  -34-
21.12 CENTAUR Indemnification....................................  -35-
21.13 Remedies Cumulative........................................  -35-
21.14 Governing Law..............................................  -35-
22.   RESOLUTION OF DISPUTES.....................................  -35-
22.1  General....................................................  -35-
22.2  Dispute Resolution Process.................................  -35-
(a)   Selection of Arbitrators...................................  -35-
(b)   Written Proposals..........................................  -36-
(c)   Hearing....................................................  -36-
(d)   Ruling.....................................................  -36-
22.3  Arbitration Costs..........................................  -36-
22.4  Attorneys' Fees/Costs......................................  -37-
</TABLE>

                                     -iv-
<PAGE>
 
Appendix 1 - Supply Agreement
Appendix 2 - CENTAUR Licenses
Appendix 3 - Oklahoma/Kentucky License
Appendix 4 - ASTRA Strategic Research Areas
Appendix 5 - First Amendment to CENTAUR Licenses
 










                                      -v-
<PAGE>
 
                 DEVELOPMENT, LICENSE AND MARKETING AGREEMENT



This Development, License and Marketing Agreement (the "LICENSE AGREEMENT"),
entered into as of June 26, 1995 (the "EFFECTIVE DATE"), is made by and between

ASTRA AB, a corporation organized and existing under the laws of Sweden, S-151
85 Sodertalje, Sweden ("ASTRA")

and

CENTAUR PHARMACEUTICALS, INC., a corporation organized and existing under the
laws of the State of Delaware, 484 Oakmead Parkway, Sunnyvale CA 94086, USA
("CENTAUR").


                                  WITNESSETH


    WHEREAS, ASTRA, through its fully owned Affiliate, Astra Arcus AB, inter
alia is conducting research and development of agents for diseases of the
central nervous system; and


    WHEREAS, CENTAUR has certain proprietary information comprising expertise,
know-how and patents in the Field; and


    WHEREAS, the parties desire to enter into a collaborative research and
development program in the Field; and


    WHEREAS, CENTAUR is willing to grant ASTRA an exclusive, worldwide right and
license to commercialize Licensed Product under the CENTAUR Technology and
Product Know-How, with a retained co-promotion right for CENTAUR in the United
States; and


    WHEREAS, CENTAUR and ASTRA as of the Effective Date, have entered into the
Supply Agreement, a copy of which is attached hereto as Appendix 1, regarding
                                                        ----------           
supply of Substance to be included in Licensed Product.


    NOW THEREFORE, in consideration of the promises and mutual covenants herein
contained, the parties agree as follows:

                                      -1-
<PAGE>
 
1.  DEFINITIONS
    -----------

As used herein, the following terms have the following meaning:

1.1 "AFFILIATE" means any company or entity which controls, is controlled by or
     ---------                                                                 
    is under common control with a party to this License Agreement.  "CONTROL"
                                                                      ------- 
    shall mean direct or indirect ownership of at least fifty percent (50%) of
    the stock or shares entitled to vote for the election of directors or direct
    or indirect ownership of at least fifty percent (50%) of the equity interest
    with the power to direct the management and policies of such non-corporate
    entities.  The terms "ASTRA" and "CENTAUR" as used herein shall be deemed to
    include Affiliates of ASTRA and CENTAUR respectively.

1.2 The "ALZHEIMERS' PROJECT" or "AP" means the development of spin trapping
         -------------------      --                                        
    agents and derivatives and compositions thereof used as free radical
    scavengers and/or therapeutics for the treatment of Alzheimer's disease, as
    specified in the R&D Plan.

1.3 "ANNUAL FUNDING" has the meaning provided in Section 5.4.
     --------------                                          

1.4 "ARCUS" means Astra Arcus AB, S-151 85 Sodertalje, Sweden, which company is
     -----                                                                     
    authorized by ASTRA to represent ASTRA in all aspects under this License
    Agreement.

1.5 "ASTRA LICENSE" has the meaning provided in Section 2.1.
     -------------                                          

1.6 "BANKRUPTCY" has the meaning provided in Section 20.3.
     ----------                                           

1.7 "CANDIDATE DRUG" or "CD" means any compound selected hereunder for GLP
     --------------      --                                               
    safety and/or other studies necessary for IND filing in the Field.

1.8 "CENTAUR GRANT" has the meaning provided in Section 2.3.
     -------------                                          

1.9 "CENTAUR LICENSES" mean collectively and as attached hereto as Appendix 2:
     ----------------                                              ---------- 

        (a) License Agreement dated as of July 15, 1992 by and among Oklahoma
            Medical Research Foundation, The University of Kentucky Research
            Foundation and CENTAUR,

        (b) Research Study Agreement dated as of February 1, 1993 by and between
            CENTAUR and [*],

        (c) Research Study Agreement dated as of June 6, 1994 by and between

                                      -2-
<PAGE>
 
            CENTAUR and [*],

        (d) Research Study Renewal Agreement dated as of January 1, 1995 by and
            between CENTAUR and [*], and

        (e) Research Study Agreement dated as of February 1, 1995 by and between
            CENTAUR and [*],

as the same may be amended, extended or modified from time to time during the
Term of this License Agreement.

1.10  "CENTAUR PATENTS" means collectively:
       ---------------                     

        (a) the patents and patent applications, if any, listed in the CENTAUR
            Patents index dated as of June 26, 1995 and initialed by the
            parties,

        (b) all additional chemical entity patents with respect to Substance for
            Licensed Product that are purchased by or licensed to CENTAUR from
            Third Persons and under which CENTAUR has the right to grant
            licenses to ASTRA during the Term hereof (collectively the "NEW
            CHEMICAL ENTITY PATENTS"), and

        (c) all "New Inventions Patents", as defined in Section 14.2,

including with respect to all such patents, all additions, divisions,
continuations, continuations-in-part, substitutions, extensions, patent term
extensions and renewals thereof and all patents issuing from such patent
applications and their foreign counterparts, provided, however, that all New
Chemical Entity Patents and New Inventions Patents referenced in this Section
1.10(b) and (c) shall only be deemed to be "CENTAUR Patents" pursuant to the
provisions of Section 14.6.  Joint Patents shall not be deemed to be "CENTAUR
Patents".

1.11  "CENTAUR TECHNOLOGY" means collectively (i) CENTAUR Patents, (ii) CENTAUR
       ------------------                                                      
      Know-How now or hereafter owned by or licensed to CENTAUR or under which
      CENTAUR has, or may in the future have, the right to grant licenses to
      ASTRA during the Term of this License Agreement that are used or useful in
      the research, development, manufacture, use or sale of Substance and
      Licensed Product, and (iii) CENTAUR's interest in the Joint Patents and
      Joint Project Technology.

1.12  "CO-PROMOTE" shall mean the right of CENTAUR to Co-Promote Licensed
       ----------                                                        
      Product in the United States pursuant to Section 8.

1.13  "CONFIDENTIAL INFORMATION" shall mean any and all information of or about
       ------------------------                                                
      a party 

                                      -3-
<PAGE>
 
      including all information relating to any technology, product, process or
      intellectual property of such party (including, but not limited to, owned
      or licensed intellectual property rights, data, know-how, samples,
      technical and non-technical materials, and specifications) as well as any
      business plan, financial information, or other confidential commercial
      information of or about such other party. Notwithstanding the foregoing,
      specific information shall not be considered "Confidential Information"
      with respect to such party to the extent that the other party possessing
      such information can demonstrate by written record or other suitable
      physical evidence that:

        (a) such specific information was lawfully in such other party's
            possession or control prior to the time such information was
            disclosed to such other party by the party to whom the information
            relates,

        (b) such specific information was developed by such other party
            independently of the Confidential Information of the other party,

        (c) such specific information was lawfully obtained by such other party
            from a third party under no obligation of confidentiality to the
            party to whom such information relates, or

        (d) such specific information was at the time it was disclosed or
            obtained by such other party, or thereafter became, publicly known
            otherwise than through a breach by such other party of such other
            party's obligations to the party to whom such information relates,
            provided, however, that disclosure of such information to a
            regulatory authority or governmental body, unless it becomes widely
            disseminated, will not be considered publicly known.

1.14  "DEFAULT" has the meaning provided in Section 20.2.
       -------                                           

1.15  "DEVELOPMENT WORK" means all work reasonably necessary to develop a CD
       ----------------                                                     
      into a Licensed Product approved for marketing and sale by the relevant
      regulatory authorities in the Major Markets.

1.16  "DOLLAR" and "$" shall mean United States dollars.
       ------       -                                   

1.17  "EC" shall mean the member countries of the European Union, as presently
       --                                                                     
      exist and as may be in the future.

1.18  "FDA" shall mean the United States Food and Drug Administration.
       ---                                                            

1.19  "FTES" means the equivalent of one person devoted full time for one year
       ----                                                                   
      (consisting of 

                                      -4-
<PAGE>
 
      a single person devoted full time or a number of persons devoted part
      time) to carrying out CENTAUR's obligations to perform Project Work as
      measured by CENTAUR's time allocation practices.

1.20  "FIELD" means the fields of treatment specified in the SP and the AP
       -----                                                              
      through the use of spin trapping agents and derivatives and compositions
      thereof used as free radical scavengers.

1.21  "FIRST COMMERCIAL SALE" shall mean, with respect to each Licensed Product
       ---------------------                                                   
      in each country, the first bona fide, arm's length sale of such Licensed
      Product in such country following receipt of all regulatory approvals
      necessary to commence regular, commercial scale sales of such Licensed
      Product in such country. Sales prior to receipt of all approvals necessary
      to commence commercial sales, such as so-called "treatment IND sales,"
      "named patient sales," and "compassionate use sales," shall not be First
      Commercial Sales.

1.22  "IND" means an "Investigational New Drug" application as such term is
       ---                                                                 
      defined under the rules and regulations of the FDA, or its equivalent in
      any country.

1.23  "JOINT PATENTS" has the meaning provided in Section 14.3.
       -------------                                           

1.24  "JOINT PROJECT TECHNOLOGY" has the meaning provided in Section 13.1.
       ------------------------                                           

1.25  "KNOW-HOW" means with respect to either party, collectively, all
       --------                                                       
      proprietary information, Confidential Information, methods, products,
      ideas, processes, technologies, inventions, data, information and all
      intellectual property rights connected therewith, whether or not
      patentable and whether oral, written or stored in any computer format,
      owned, controlled or licensed to either party, now or during the Term of
      this License Agreement, to the extent related to the research,
      development, manufacture, use or sale of any Licensed Product in the Field
      worldwide, and in the case where licensed to a party, where such party
      has, or may in the future have, the right to transfer, disclose and/or
      grant licenses to the other party without violating contractual agreements
      with such third party existing prior or subsequent to the Effective Date.

1.26  "LICENSED PRODUCT" means any compound, product or process utilizing
       ----------------                                                  
      CENTAUR Technology.

1.27  "MAJOR MARKETS" means France, Germany, Japan, Sweden, United Kingdom and
       -------------                                                          
      the United States.

1.28  "NDA" means a New Drug Approval application, as defined under the rules 
       ---                                                                   
      and 

                                      -5-
<PAGE>
 
      regulations of the FDA, or its equivalent in any country.

1.29  "NET SALES" means the aggregate gross revenues derived by ASTRA and its
       ---------                                                             
      sublicensees on account of the sale of Licensed Product(s) in an arm's
      length transaction, less:

        (a) trade and quantity discounts or rebates actually taken or allowed,

        (b) credits or allowances given or made for rejection, damaged Licensed
            Product, return of previously sold Licensed Product or retroactive
            price reductions actually taken or allowed,

        (c) any tax or government charge (including any tax such as a value
            added or similar tax or government charge other than an income tax)
            levied on the sale, transportation or delivery of a Licensed Product
            and borne by the seller thereof, and

        (d) any charges for freight or insurance billed to the final customer.

      Where (i) a Licensed Product is sold as one of a number of items without a
      separate price; or (ii) the consideration for the Licensed Product shall
      include any non-cash element; or (iii) the Licensed Product shall be
      transferred in any manner other than an invoiced sale, the Net Sales
      applicable to any such transaction shall be deemed to be ASTRA's average
      Net Sales for the applicable quantity of Licensed Product at that time in
      the country in which the transaction occurred. If there are no independent
      Net Sales of Licensed Product in the country at that time, then ASTRA and
      CENTAUR shall mutually agree on a surrogate measurement.

1.30  "NEW CHEMICAL ENTITY PATENTS" has the meaning provided in the definition
       ---------------------------                                            
      of CENTAUR Patents.

1.31  "NEW INVENTIONS PATENTS" has the meaning provided in Section 14.2.
       ----------------------                                           

1.32  "OKLAHOMA/KENTUCKY LICENSE" means the license granted as of the Effective
       -------------------------                                               
      Date to ASTRA by the Oklahoma Medical Research Foundation and the
      University of Kentucky Research Foundation, attached hereto as Appendix 3.
                                                                     ---------- 
1.33  "OUT-OF-POCKET RESEARCH COSTS" means all amounts paid by CENTAUR to third
       ----------------------------                                            
      parties as provided in Budget(s) set forth in the R&D Plans in connection
      with CENTAUR's performance of Project Work, except for such categories of
      such expenses which CENTAUR and ASTRA agree in the R&D Plans are to be
      paid by CENTAUR through the payments received by CENTAUR in respect of
      CENTAUR's FTEs. Out-of-Pocket 

                                      -6-
<PAGE>
 
      Research Costs will not include employee salaries or other related
      expenses, lab supplies used in CENTAUR's business generally, rent,
      overhead or depreciation or legal expenses.

1.34  "PRODUCT KNOW-HOW" means all enabling information with respect to
       ----------------                                                
      production and quality control of Substance (including patented
      processes), now owned by or licensed to CENTAUR or hereinafter acquired or
      developed by CENTAUR or ASTRA during the Term of this License Agreement or
      the Supply Agreement.

1.35  "PROJECT" means either of SP or AP, and "PROJECTS" means collectively SP
       -------                                 --------                       
      and AP.

1.36  "PROJECT WORK" means collectively the Research Work and the Development
       ------------                                                          
      Work.

1.37  "R&D PERIOD" has the meaning given in Section 4.3.
       ----------                                       

1.38  "R&D PLAN(S)" means the research and development plans and budgets for SP
       -----------                                                             
      and AP respectively dated as of June 26, 1995 and initialed by the
      parties, outlining the parties' best estimate as of the Effective Date of
      the entire scope of Research Work and Development Work to be performed
      within the respective Project and the Annual Funding to be provided by
      ASTRA to CENTAUR for the Research Work intended to be performed by CENTAUR
      under such R&D Plans.

1.39  "RESEARCH WORK" means the pre-clinical work outlined for each Project in
       -------------                                                          
      the respective R&D Plan up to selection of adequate number of CDs.

1.40  "SPECIFICATIONS" has the meaning provided in the Supply Agreement.
       --------------                                                   

1.41  "STEERING COMMITTEE" has the meaning provided in Section 3.1.
       ------------------                                          

1.42  "STROKE PROJECT" or "SP" means development of spin trapping agents and
       --------------      --                                               
      derivatives and compositions thereof used as free radical scavengers
      and/or therapeutics for (i) acute treatment of stroke, (ii) prophylactic
      treatment of stroke, (iii) head trauma, and (iv) multi-infarct dementia,
      all as specified in the R&D Plans.

1.43  "SUBSTANCE" means the active ingredient(s) included in Licensed Product.
       ---------                                                              

1.44  "SUPPLY AGREEMENT" means the agreement entered into by the parties as of
       ----------------                                                       
      the Effective Date regarding manufacture and supply of active ingredients
      included in Licensed Product, a copy of which is attached hereto as
      Appendix 1.
      ----------

1.45  "TERM" has the meaning provided in Section 20.1.
       ----                                           

                                      -7-
<PAGE>
 
1.46  "THIRD PARTY ROYALTIES" has the meaning provided in Section 7.6.
       ---------------------                                          

1.47  "THIRD PERSONS" has the meaning provided in Section 3.6.
       -------------                                          

2.    GRANT
      -----

2.1   LICENSE GRANT TO ASTRA - ASTRA LICENSE. Subject to the terms and
      --------------------------------------
      conditions of this License Agreement and the Supply Agreement, CENTAUR
      hereby grants to ASTRA:

        (a) EXCLUSIVE LICENSE.  An exclusive, royalty-bearing, worldwide license
            -----------------                                                   
            (the "EXCLUSIVE LICENSE"), including ASTRA's right to grant
            sublicenses, under the CENTAUR Technology to research, develop, use,
            sell and have sold Licensed Product in the Field in accordance with
            this License Agreement.  The Exclusive License shall be subject to
            CENTAUR's right to Co-Promote Licensed Product pursuant to Section
            9, and

        (b) CO-EXCLUSIVE LICENSE.  Collectively, co-exclusive (with CENTAUR)
            --------------------                                            
            worldwide license(s) (the "CO-EXCLUSIVE LICENSE") (i) a royalty-
            bearing license under the CENTAUR Technology and Product Know-How to
            manufacture Substance for Licensed Product for use and sale in the
            Field to the extent such manufacture is undertaken by ASTRA pursuant
            to the Supply Agreement, and (ii) a non-royalty bearing license of
            CENTAUR's rights in the Field, including ASTRA's right to grant
            sublicenses, under the CENTAUR Licenses, provided, further, that in
            the event of termination of this License Agreement by ASTRA pursuant
            to (x) Default by CENTAUR pursuant to Section 20.2, or (y)
            Bankruptcy of CENTAUR pursuant to Section 20.3, said Co-Exclusive
            License shall be deemed to be an exclusive license to ASTRA for such
            purposes in the Field.

      The Exclusive License and Co-Exclusive License may be herein collectively
      referred to as the "ASTRA LICENSE".

2.2   ASTRA AFFILIATES.  ASTRA may designate Affiliates in countries where such
      ----------------                                                         
      exist and third parties in countries where no Affiliates exist, to carry
      out ASTRA's rights and obligations hereunder in whole or in part, provided
      that ASTRA remains primarily liable and such Affiliates or third parties
      consent to be bound by this License Agreement to the same extent as ASTRA.
      ASTRA shall inform CENTAUR from time to time of the names of the
      Affiliates and third parties appointed by ASTRA hereunder.

                                      -8-
<PAGE>
 
2.3   LICENSE GRANT TO CENTAUR - CENTAUR GRANT.  Subject to the terms and
      ----------------------------------------                           
      conditions of this License Agreement and the Supply Agreement, ASTRA
      hereby grants to CENTAUR a co-exclusive (with ASTRA), royalty-free,
      worldwide license (the "CENTAUR GRANT") under ASTRA's interests in the
      Joint Patents and Joint Project Technology for use by CENTAUR solely to
      fulfill its obligations under this License Agreement and the Supply
      Agreement.

2.4   CENTAUR CO-PROMOTE RIGHTS.  CENTAUR retains the right in the United States
      -------------------------                                                 
      to Co-Promote, directly and solely through its own wholly-owned sales
      force and not that of a third party, any Licensed Product launched by
      ASTRA in the United States. The general terms for such Co-Promote are set
      forth in Section 8, but the detailed conditions thereof shall be
      separately agreed upon by the parties.

2.5   OKLAHOMA/KENTUCKY LICENSE.  CENTAUR agrees and acknowledges that this
      -------------------------                                            
      License Agreement and ASTRA's obligations hereunder (including, without
      limitation, the obligation to make payments to CENTAUR pursuant to Section
      7.2) are specifically contingent upon (i) the execution and delivery of
      the Oklahoma/Kentucky License to ASTRA in substantially the form attached
      hereto as Appendix 3, and (ii) the First Amendment to the CENTAUR
                ----------
      Licenses, in substantially the form attached hereto as Appendix 5. CENTAUR
                                                             ----------
      agrees and acknowledges that the Oklahoma/Kentucky License to ASTRA is co-
      exclusive with CENTAUR, notwithstanding the prior exclusive right and
      license granted to CENTAUR pursuant to the CENTAUR Licenses.

2.6   ACCESS TO CENTAUR TECHNOLOGY.  In order to permit ASTRA the full use and
      ----------------------------                                            
      enjoyment of the ASTRA License, CENTAUR shall, on the Effective Date and
      from time to time thereafter during the Term, make available to ASTRA all
      CENTAUR Technology and Product Know-How.

3.    STEERING COMMITTEE AND DAY TO DAY MANAGEMENT OF THE PROJECT WORK
      ----------------------------------------------------------------

3.1   FORMATION OF STEERING COMMITTEE.  Following the Effective Date, the 
      -------------------------------                                     
      parties will form a Steering Committee comprised of senior managers (two
      (2) each from ASTRA and CENTAUR), responsible for the Projects. The
      Steering Committee shall be initially chaired by a manager selected by
      CENTAUR up to the date when Development Work under a Project is first
      commenced, and thereafter, by a manager selected by ASTRA. The Steering
      Committee may, from time to time, when deemed necessary or appropriate,
      call upon other representatives of the parties to participate in the work
      of the Steering Committee.

                                      -9-
<PAGE>
 
3.2   MEETINGS OF THE STEERING COMMITTEE.  The Steering Committee will meet at
      ----------------------------------                                      
      least quarterly, either in person or by telephone conference. At least two
      meetings each year will be held in person, alternating between ASTRA and
      CENTAUR locations. Extraordinary meetings shall be held when necessary.

3.3   STEERING COMMITTEE REVIEW OF PROJECT WORK.  Within the framework of this
      -----------------------------------------                               
      License Agreement and the R&D Plans, the Steering Committee will review
      the progress of the Project Work, scrutinize the non-financial reporting
      and direct the work performed hereunder, including, without limitation,
      decision-making with regard to inter alia the following matters:

      -  procedures for exchange of Know-How between the parties; and

      -  directing the Research Work in pursuit of CDs; and

      -  selection of CDs for further development - it being understood that
         more than one CD may be selected within each Project and that such CDs
         may later be excluded from further development without affecting
         ASTRA's rights under this License Agreement; and

      -  deciding on whether or not to search for additional CDs within a
         Project; and

      -  regulatory matters.

3.4   STEERING COMMITTEE - DISPUTE RESOLUTION.  Disagreements, if any, which may
      ---------------------------------------                                   
      arise between the respective parties' representatives in the Steering
      Committee shall be amicably resolved whenever possible. In the event the
      Steering Committee is deadlocked, the matter shall be referred to the
      President of each of CENTAUR and ARCUS for resolution. In the event the
      Presidents are unable to resolve such deadlock, ASTRA will have the sole
      right to finally decide on all matters regarding (i) the Development Work,
      (ii) approach of the Research Work in pursuit of CDs, (iii) selection of
      CDs, (iv) the development of a CD for more than one (1) indication for
      use, and (v) whether or not to search for additional CDs in a respective
      Project; and CENTAUR shall have the sole right to finally decide all other
      matters regarding the Research Work to be performed by CENTAUR.

3.5   PROJECT GROUPS.  Each party will appoint managers for the respective
      --------------                                                      
      Projects to form Project Groups. The Project Groups shall meet at regular
      intervals to plan, share ideas and review progress on the Project Work.
      The Project Groups shall be responsible to the Steering Committee for
      accomplishing Project goals and objectives and will coordinate 

                                      -10-
<PAGE>
 
      joint research and development efforts between the parties. During the
      course of the Project Work, each party shall permit individuals designated
      by the other to be present, when reasonable, while various tasks,
      inspections and other activities under the Project Work are being
      conducted.

3.6   THIRD PERSONS.  Subject to the prior approval of the Steering Committee, 
      -------------
      the parties may from time to time appoint third persons ("THIRD PERSONS")
      to provide services with respect to the Projects.

4.    RESEARCH WORK
      -------------

4.1   COMMENCEMENT AND COMPLETION OF RESEARCH WORK.  The parties shall commence
      --------------------------------------------                             
      the Research Work without undue delay following the Effective Date, and
      shall use their best reasonable efforts to complete the Research Work
      substantially in accordance with the R&D Plans and the other terms and
      conditions of this License Agreement.

4.2   R&D PLANS.  The parties acknowledge that the R&D Plans as of the Effective
      ---------                                                                 
      Date are estimates of the scope of Research Work and Development Work to
      be performed under the respective Project during the indicated five year
      timeframe, which R&D Plans will be specified in further detail by the
      Steering Committee from time to time.

4.3   R&D PERIOD.  The parties have agreed upon five R&D Periods (i.e., July 1,
      ----------                                                               
      1995 - June 30, 2000). The first R&D Period shall commence as of July 1,
      1995 and shall continue thereafter through and including June 30, 1996.
      Subsequent R&D Periods shall be for the same twelve (12) calendar months
      (i.e., July 1 - June 30) (the "R&D PERIOD"). During the third R&D Period
      (i.e., July 1, 1997 - June 30, 1998), the Steering Committee will propose
      R&D Plan(s) covering Research and Development Work, if any, which will
      remain to be completed after the fifth and final R&D Period (i.e., on and
      after June 30, 2000) with respect to each Project. If the parties are
      unable to agree on extensions of the R&D Plan(s) and R&D Periods after the
      fifth R&D Period, ASTRA will have the sole right to determine the scope
      and budget of such R&D Plan(s), if any, extending after the fifth R&D
      Period.

5.    FUNDING OF RESEARCH WORK
      ------------------------

5.1   BUDGETS.  The budget set forth in the R&D Plans (the "BUDGET") as of the
      -------                                                                 
      Effective Date is intended to provide for Research Work to be undertaken
      during the five R&D Periods.

5.2   CENTAUR FTE.  ASTRA shall provide Annual Funding to CENTAUR at an annual
      -----------                                                             
      rate of [*] (the "FTE 

                                      -11-
<PAGE>
 
      RATE") times the number of CENTAUR FTEs employed by CENTAUR to perform
      Research Work during the relevant R&D Period. The FTE Rate shall be
      increased annually on the anniversary of the Effective Date by [*].

5.3   ASTRA PAYMENTS OF ANNUAL FUNDING/OUT-OF-POCKET RESEARCH COSTS.  ASTRA 
      -------------------------------------------------------------         
      shall pay CENTAUR quarterly in advance the amount of Annual Funding
      contemplated to be provided to CENTAUR with respect to each calendar
      quarter as specified in the Budget pursuant to the respective R&D Plan
      (the "ADVANCE AMOUNT"), based on (i) the number of CENTAUR FTEs specified
      with respect to such calendar quarter, and (ii) Out-of-Pocket Research
      Costs. Within thirty (30) days following the end of each calendar quarter,
      CENTAUR shall submit to ASTRA an accounting of the actual amount of
      research funding incurred with respect to such calendar quarter (the
      "ACTUAL AMOUNT"), indicating the number of CENTAUR FTEs utilized and the
      actual Out-of-Pocket Research Costs incurred by CENTAUR in such calendar
      quarter. If the Actual Amount exceeds the Advance Amount and provided that
      ASTRA has agreed in advance to the expenditure of such excess amount,
      ASTRA shall pay such excess amount to CENTAUR at the time of payment of
      Annual Funding for the following calendar quarter. If the Advance Amount
      exceeds the Actual Amount, ASTRA shall deduct such excess amount from
      payments of Annual Funding for the next calendar quarter. Annual Funding
      Payments shall be made by wire transfer to a bank designated by CENTAUR
      from time to time.

5.4   FUNDING OF R&D PERIODS - ANNUAL MAXIMUM.  The Steering Committee may 
      ---------------------------------------                              
      modify the R&D Plans from time to time, it being understood, however, that
      unless otherwise agreed by ASTRA, and notwithstanding the provisions of
      Sections 5.2 and 5.3, ASTRA's undertaking to fund Research Work and
      Development Work to be performed by CENTAUR hereunder shall not be more
      than Six Million Dollars ($6,000,000.00) annually for each of R&D Periods
      one through five, unless such sum is increased by ASTRA in its sole
      discretion or decreased pursuant to Section 20.4 (the "ANNUAL FUNDING").

5.5   CENTAUR'S RECORDS.  CENTAUR shall keep accurate records of the number of
      -----------------                                                       
      CENTAUR FTEs that perform Project Work and Out-of-Pocket Research Costs
      expended by CENTAUR for the latest three (3) R&D Periods. ASTRA shall have
      the right annually, at ASTRA's expense, to have an independent, certified
      public accountant reasonably acceptable to CENTAUR, review and audit such
      records, upon reasonable notice and during regular business hours, for the
      purpose of verifying the number of CENTAUR FTEs that performed Project
      Work and the expenditure of Out-of-Pocket Research Costs. If such review
      and audit reflects an overpayment to CENTAUR, CENTAUR shall promptly remit
      such overpayment to ASTRA, together with reasonable interest. If the
      overpayment is equal to or greater than five percent (5%) of the Annual

                                      -12-
<PAGE>
 
      Funding made by ASTRA to CENTAUR for such R&D Period(s), for which the
      review and audit has been undertaken, CENTAUR shall reimburse ASTRA for
      all costs of such review and audit.

6.    DEVELOPMENT WORK
      ----------------

6.1   DEVELOPMENT WORK - ASTRA.  Under the supervision of the Steering 
      ------------------------
      Committee, ASTRA shall be primarily responsible for undertaking
      Development Work. The Steering Committee will decide on detailed plans for
      Development Work and may from time to time amend such plans as the
      Steering Committee deems mutually appropriate.

6.2   DEVELOPMENT WORK - CENTAUR.  CENTAUR will perform such portions of the
      --------------------------                                            
      Development Work as agreed upon by the Steering Committee. The Annual
      Funding will include the Development Work to be performed by CENTAUR in
      accordance with the provisions of Section 5.4.

6.3   REGULATORY APPROVALS.  All registrations, approvals and other regulatory
      --------------------                                                    
      requirements relating to Licensed Product will be applied for by ASTRA and
      held in ASTRA's name, provided, however, that with respect to the
      manufacture of Substance for Licensed Product, such obligations of the
      parties will be governed by the Supply Agreement.

6.4   DEVELOPMENT OF LICENSED PRODUCT - MAJOR MARKETS.  Following successful
      -----------------------------------------------                       
      completion of the Research Work for a respective Project, ASTRA agrees,
      for each Project, to use best reasonable efforts, including providing
      adequate resources and qualified personnel, to undertake Development Work
      for at least one Licensed Product to secure marketing approval for such
      Licensed Product for at least the Major Markets. In such regard, ASTRA
      shall:

        (a) NDA APPROVAL.  File for NDA approval in each of the Major Market
            ------------                                                    
            countries within twelve (12) months following completion of all
            required clinical trials and other studies in each relevant country,

        (b) FIRST COMMERCIAL SALE.  Make the First Commercial Sale and commence
            ---------------------                                              
            regular commercial sales of each Licensed Product in each country of
            the Major Markets as promptly as practicable, but within nine (9)
            months after receipt of NDA and such other approvals and permits as
            ASTRA deems reasonably necessary to successfully commercialize the
            Licensed Product in the relevant Major Markets (i.a. government
                                                            ----           
            reimbursement or price approval).

                                      -13-
<PAGE>
 
    Notwithstanding the time limits set forth in Section 6.4(a) or 6.4(b), such
    limits shall be extended (i) to account for any period during which ASTRA
    encounters technical or regulatory delays which prevent ASTRA's compliance
    with such time limits, provided that ASTRA informs CENTAUR on an ongoing
    basis of such delays, which delays have not resulted from ASTRA's gross
    negligence or willful misconduct, and (ii) for other commercial reasons
    which ASTRA and CENTAUR reasonably believe will benefit long-term commercial
    sales of such Licensed Product.



6.5 DEVELOPMENT OF LICENSED PRODUCT - OTHER THAN MAJOR MARKETS.  Following
    ----------------------------------------------------------            
    successful commercial sale of Licensed Product in any of the Major Markets,
    ASTRA agrees to use best reasonable efforts to make the First Commercial
    Sale and commence regular commercial sales of each Licensed Product in each
    country of the world, other than the Major Markets.  ASTRA and CENTAUR will
    confer with respect to such countries where sales and marketing of Licensed
    Product is not warranted as a result of economies of scale.



6.6 ASTRA NON-COMPLIANCE. In the event ASTRA fails to comply with Section 6.4
    --------------------
    (a), 6.4(b) or 6.5, and CENTAUR provides a written notice to ASTRA of such
    failure, ASTRA shall, within sixty (60) days of ASTRA's receipt of such
    notice from CENTAUR, provide CENTAUR with a plan reasonably acceptable to
    CENTAUR of ASTRA's proposal to remedy such failure within a time period not
    to exceed one hundred eighty (180) days from the date of CENTAUR's receipt
    of such plan. In the event ASTRA shall fail to (i) provide CENTAUR with such
    a plan within such 60-day period, or (ii) cure such failure with respect to
    ASTRA's obligations pursuant to Section 6.4(a), 6.4(b) or 6.5 within one
    hundred eighty (180) days, in accordance with such plan, such failure shall
    not be deemed a breach or Default by ASTRA of this License Agreement and
    CENTAUR's sole and exclusive remedy thereupon shall be the right to notify
    ASTRA within one hundred twenty (120) days thereafter of CENTAUR's intent to
    terminate the ASTRA License with regard to the relevant country and Licensed
    Product for which ASTRA has failed to comply with respect to Section 6.4(a),
    6.4(b) or 6.5. In such event, ASTRA shall allow CENTAUR or its nominee to
    make cross reference to ASTRA's relevant NDA file(s) and take such other
    actions as may be reasonably necessary for CENTAUR to efficiently
    commercialize the relevant Licensed Product in such country.


6.7 NOTIFICATION OF DEVELOPMENT WORK.  Each party will inform the other from
    --------------------------------                                        
    time to time as to the progress of the Development Work performed by such
    party in accordance with the routines agreed upon by the Steering Committee.

7.  REMUNERATION TO CENTAUR
    -----------------------

                                      -14-
<PAGE>
 
7.1 TOTAL COMPENSATION TO CENTAUR.  As total compensation to CENTAUR for (i)
    -----------------------------                                           
    CENTAUR's obligations undertaken pursuant to this License Agreement, and
    (ii) the grant of the ASTRA License, CENTAUR shall be paid only such
    compensation and for such periods as set forth in Sections 7 and 8 of this
    License Agreement.

7.2 PAYMENTS.  As payment for prior and future research and development
    --------                                                           
    performed by CENTAUR, ASTRA will make the following non-refundable payments
    to CENTAUR upon the occurrence of the following events:

        (a) EFFECTIVE DATE. On the Effective Date (subject to ASTRA's receipt of
            --------------                                                      
            the Oklahoma/Kentucky License and First Amendment to CENTAUR
            Licenses provided in Section 2.5), Four Million Dollars
            ($4,000,000.00) as reimbursement for prior research and development
            expenses incurred by CENTAUR,

        (b) SELECTION OF FIRST CD OF SP.  [*] within thirty (30) days from the
            ---------------------------                                      
            date of selection of the first CD for the first indication within
            SP, and [*] within thirty (30) days from the date of selection of
            the first CD for each subsequent indication within the SP, it being
            understood, however, that payment (i) will only be made once in
            respect of each CD, even if a CD is selected for more than one
            indication, and (ii) payment under this Section 7.2(b) is limited to
            a maximum of [*],

        (c) SELECTION OF FIRST CD OF AP.  [*] within thirty (30) days from the
            ---------------------------                                      
            date of selection of the first CD within the AP,

        (d) FIRST SP IND IN U.S..  [*] within thirty (30) days from the date of
            --------------------                                             
            filing of the first IND on a Licensed Product in the United States
            within the SP,

        (e) FIRST SP IND IN EC MAJOR MARKET OR JAPAN.  [*] within thirty (30)
            ----------------------------------------                      
            days from the date of filing of the first IND on a Licensed Product
            in any of the Major Markets within EC, or Japan within the SP,

        (f) FIRST AP IND IN U.S..  [*] within thirty (30) days from the date of
            --------------------                                             
            filing of the first IND on a Licensed Product in the United States
            within the AP,

        (g) FIRST AP IND IN EC MAJOR MARKET OR JAPAN.  [*]
            ----------------------------------------                      

                                      -15-
<PAGE>
 
            [*] within thirty (30) days from the date of filing of the first IND
            on a Licensed Product in any of the Major Markets within EC, or
            Japan within the AP,

        (h) FIRST SP PHASE III TRIAL IN U.S..  [*] within thirty (30) days from
            --------------------------------                                
            the date ASTRA receives the first approval to start phase III
            clinical trials in the United States on a Licensed Product within
            the SP,

        (i) FIRST SP PHASE III TRIAL IN EC MAJOR MARKETS OR JAPAN. [*] within 
            -----------------------------------------------------              
            thirty (30) days from the date ASTRA receives the first approval to
            start phase III clinical trials in any of the Major Markets within
            EC, or Japan, on a Licensed Product within the SP,

        (j) FIRST AP PHASE III TRIAL IN U.S..  [*] within thirty (30) days from
            --------------------------------
            the date ASTRA receives the first approval to start phase III
            clinical trials in the United States on a Licensed Product within
            the AP,

        (k) FIRST AP PHASE III TRIAL IN EC MAJOR MARKETS OR JAPAN.  [*] within
            -----------------------------------------------------              
            thirty (30) days from the date ASTRA receives the first approval to
            start phase III clinical trials in any of the Major Markets within
            EC, or Japan, on a Licensed Product within the AP,

        (l) FIRST SP NDA FILING IN U.S..  [*] within thirty (30) days from the
            ---------------------------                                         
            date of filing by ASTRA of the first NDA in the United States on a
            Licensed Product within the SP,

        (m) FIRST SP NDA FILING IN EC MAJOR MARKET OR JAPAN.  [*] within thirty
            -----------------------------------------------
            (30) days from the date of filing by ASTRA of the first NDA in any
            of the Major Markets within EC, or Japan, on a Licensed Product
            within the SP,

        (n) FIRST AP NDA FILING IN U.S..  [*] within thirty (30) days from the
            ---------------------------                                         
            date of filing by ASTRA of the first NDA in the United States on a
            Licensed Product within the AP,

                                      -16-
<PAGE>
 
        (o) FIRST AP NDA FILING IN EC MAJOR MARKET OR JAPAN. [*] within thirty
            ----------------------------------------------- 
            (30) days from the date of filing by ASTRA of the first NDA in any
            of the Major Markets within EC, or Japan, on a Licensed Product
            within the AP,

        (p) FIRST SP NDA APPROVAL IN U.S..  [*] within thirty (30) days from 
            -----------------------------                                    
            the date of the first NDA approval obtained by ASTRA in the United
            States on a Licensed Product within the SP,

        (q) FIRST SP NDA APPROVAL IN EC MAJOR MARKET OR JAPAN.  [*] within
            -------------------------------------------------                   
            thirty (30) days from the date of the first NDA approval obtained by
            ASTRA in any of the Major Markets within EC, or Japan, on a Licensed
            Product within the SP,

        (r) FIRST AP NDA APPROVAL IN U.S..  [*] within thirty (30) days from
            -----------------------------                                    
            the date of the first NDA approval obtained by ASTRA in the United
            States on a Licensed Product within the AP, and

        (s) FIRST AP NDA APPROVAL IN EC MAJOR MARKET OR JAPAN.  [*] within 
            -------------------------------------------------                   
            thirty (30) days from the date of the first NDA approval obtained by
            ASTRA in any of the Major Markets within EC, or Japan, on a Licensed
            Product within the AP.

7.3 NET SALES ROYALTY.  ASTRA will pay to CENTAUR royalty based on the Net Sales
    -----------------                                                           
    of Licensed Product as follows:

        (a) COUNTRIES WHERE CENTAUR PATENTS ARE EFFECTIVE.  [*] of Net Sales
            ---------------------------------------------                       
            of Licensed Product in countries where, without the ASTRA License
            granted hereunder, the manufacture, use or sale of such Licensed
            Product would infringe the CENTAUR Patents,

        (b) COUNTRIES WHERE CENTAUR PATENTS INAPPLICABLE.  [*] of Net Sales
            --------------------------------------------                       
            of Licensed Product in countries other than those set forth in
            Section 7.3(a).

7.4 CENTAUR DEFAULT/BANKRUPTCY.  In the event of termination of this License
    --------------------------                                              
    Agreement by ASTRA pursuant to (i) Default by CENTAUR pursuant to Section
    20.2, or (ii) Bankruptcy of CENTAUR pursuant to Section 20.3, ASTRA may
    assume development and manufacture of Substance for ASTRA's and ASTRA's
    sublicensee's use worldwide, and in such event, ASTRA shall, in lieu of all
    other payments otherwise to be made by 

                                      -17-
<PAGE>
 
    ASTRA to CENTAUR under this License Agreement or the Supply Agreement,
    including, without limitation, such amounts set forth in Sections 7.2 and
    7.3, make payments to CENTAUR for such period of time as limited by the
    provisions of Section 7.5, in an amount equal to [*] of Net Sales of
    Licensed Product, less all Third Party Royalties pursuant to Section 7.6. In
    the event of such termination of this License Agreement, the ASTRA License
    shall be deemed to be an exclusive, worldwide, perpetual, royalty-free, with
    the right to grant sublicenses, except for such payments to be made pursuant
    to this Section 7.4 as limited by the provisions of Section 7.5.

7.5 TERMINATION OF CENTAUR ROYALTY - ASTRA PAID UP LICENSE.  ASTRA's obligation
    ------------------------------------------------------                     
    to pay CENTAUR royalty on Net Sales of Licensed Product will expire, on a
    country-by-country basis, on the later of (i) the last to expire of the
    CENTAUR Patents, and (ii) the fifteenth (15th) anniversary of the First
    Commercial Sale of a Licensed Product in a relevant country.  Upon
    termination of the CENTAUR royalty, the ASTRA License will be deemed co-
    exclusive with CENTAUR, perpetual, worldwide and non-royalty bearing.

7.6 THIRD PARTY ROYALTIES ON SALES OF LICENSED PRODUCT.  ASTRA and CENTAUR will
    --------------------------------------------------                         
    share, on an equal (50/50) basis the cost of all royalties, fees and license
    fees payable to third parties due on Net Sales of Substance or Licensed
    Product pursuant to license agreements existing (i) on the Effective Date,
    including, without limitation, payments, if any, due pursuant to the CENTAUR
    Licenses, and (ii) after the Effective Date to the extent approved by the
    Steering Committee (collectively, the "THIRD PARTY ROYALTIES"), but not
    including research funding or grant payments payable by CENTAUR to third
    parties.

7.7 COMPUTATION AND PAYMENT OF ROYALTY TO CENTAUR.  ASTRA shall deliver to 
    ---------------------------------------------              
    CENTAUR within sixty (60) days after the end of each calendar quarter a
    written report showing its computation of remuneration to CENTAUR due under
    this License Agreement during such calendar quarter and at the same time
    make the payment of all Net Sales royalties due CENTAUR. All Net Sales shall
    be segmented in each such report according to sales on a country-by-country
    basis, including the rates of exchange used for conversion to Dollars from
    the currency in which such sales were made. For the purposes hereof, the
    rates of exchange to be used for conversion hereunder, Dollars shall be the
    average purchase rates of the respective currencies as quoted by
    Skandinaviska Enskilda Banken, Sweden for the quarter in question.

7.8 ASTRA RECORDS.  ASTRA shall keep for a period of three (3) years following
    -------------                                                             
    the year to which such records relate, full, true and accurate books of
    accounts and other records containing all information and data which may be
    necessary to ascertain and verify the Net Sales royalties payable to CENTAUR
    hereunder.

7.9 CENTAUR AUDIT.  CENTAUR shall have the right to have such pertinent books
    -------------                                                            
    and 

                                      -18-
<PAGE>
 
    records of ASTRA inspected and examined at all reasonable times for the
    purpose of determining the accuracy of payments made hereunder. Such
    inspection and examination shall be conducted by an independent, certified
    public accountant selected by CENTAUR and to whom ASTRA shall have no
    reasonable objection. Such accountant shall not disclose to CENTAUR any
    information except for information necessary to verify the accuracy of the
    reports and payments made pursuant to this License Agreement. Results of
    such review shall be made available to both parties. If the review reflects
    an underpayment, ASTRA shall promptly remit to CENTAUR any amounts due with
    reasonable interest. If the underpayment is equal to or greater than five
    percent (5%) of the payments made by ASTRA to CENTAUR for such period under
    review, ASTRA shall pay all costs of such review and audit.

8.  OPTION TO CO-PROMOTE IN THE U.S.
    --------------------------------

8.1 NOTIFICATION TO CO-PROMOTE.  Within sixty (60) days after filing of an NDA
    --------------------------                                                
    with respect to any Licensed Product in the United States, CENTAUR shall
    notify ASTRA of its willingness to Co-Promote such Licensed Product with
    ASTRA in the United States.  Should CENTAUR fail to do so, CENTAUR's option
    to Co-Promote such Licensed Product shall automatically expire.

8.2 ELECTION OF CO-PROMOTION RIGHTS.  Upon CENTAUR's exercise of its Co-Promote
    -------------------------------                                            
    rights set forth in Section 8.1, ASTRA and CENTAUR shall discuss how to
    implement the Co-Promote activities and agree in good faith upon conditions
    therefor according to the following principles:

        (a) CO-PROMOTE MARKET PLAN.  CENTAUR and ASTRA shall promote the
            ----------------------                                      
            Licensed Product under ASTRA's trademark and the NDA held by ASTRA.
            ASTRA or its nominee shall be the sole distributor of the Licensed
            Product.  CENTAUR and ASTRA shall in good faith discuss strategies
            for marketing the Licensed Product including the pricing, and seek
            to produce a mutually agreeable marketing plan for the Licensed
            Product.  The marketing plan shall include role, activities and
            obligations of ASTRA and CENTAUR.  In the event the parties fail to
            agree as above said, ASTRA is entitled to make the final decision.
            The parties shall review progress against the marketing plan from
            time to time.

        (b) CENTAUR MEDICAL REPRESENTATIVES.  In no event shall the number of
            -------------------------------                                  
            CENTAUR's medical representatives be less than ten percent (10%) of
            ASTRA's medical representatives used for detailing the Licensed
            Product or exceed the number of ASTRA's medical representatives to
            be used for 

                                      -19-
<PAGE>
 
            detailing the Licensed Product. The total number of medical
            representatives shall not be higher than the respective market
            reasonably requires for the Licensed Product in question.

        (c) CO-PROMOTE PROFITS.  CENTAUR and ASTRA shall share the profit
            ------------------                                           
            obtained from the Co-Promote activities on a [*]

            The term "profit" as used herein shall mean, with respect to the
            given period, the Net Sales of the Licensed Product in the United
            States less

            (i)   the cost of the Licensed Product including, without limitation
                  (1) all Third Party Royalties, (2) Net Sales royalty payable
                  to CENTAUR hereunder, (3) the supply price for Substance
                  payable to CENTAUR pursuant to the Supply Agreement, if
                  CENTAUR is manufacturing Substance, and (4) other direct and
                  indirect costs actually incurred in connection with the
                  manufacture of the Licensed Product in finished form in
                  accordance with generally acceptable accounting principles;
                  and

            (ii)  distribution cost of ASTRA not exceeding [*] of the Net Sales;
                  and

            (iii) advertisement and promotional expenses actually used by the
                  parties comprising media publicity, sample package,
                  promotional materials and other selling materials and
                  seminars, conventions and symposia and any other activities
                  generally recognized in the United States to be advertisement
                  and promotion, but excluding cost for detailing the Licensed
                  Product by the medical representatives of the parties; and

            (iv)  the cost of phase IV studies on the Licensed Product amortized
                  over five years; and

            (v)   [*] of the Net Sales for the cost of Development Work related
                  to the Licensed Product undertaken at ASTRA's expense, such
                  cost to be deducted from the Net Sales at the said rate for
                  the initial [*] of co-promotion hereunder.

                                      -20-
<PAGE>
 
8.3  CO-PROMOTE TERM.  The co-promotion by CENTAUR subject to this Article 8
     ---------------                                                        
     shall continue for a period of not less than [*], as separately agreed by
     the parties.

9.   EXCHANGE OF INFORMATION
     -----------------------

9.1  COMMUNICATION OF INFORMATION.  Commencing on the Effective Date and
     ----------------------------                                       
     continuing thereafter during the Term, each party shall, on a timely and
     regular basis, furnish each other with any Know-How obtained by such party
     pursuant to the procedures agreed upon by the Steering Committee. Each
     party shall promptly and thoroughly disclose to the other party all
     information and data in the Field resulting from activities undertaken as
     part of the Project Work. In addition, each party shall promptly disclose
     to the other party all safety and toxicity data relating to Licensed
     Product. The parties shall agree on a plan for adverse event reporting and
     shall keep one another appropriately informed.

10.  REPRESENTATIONS AND WARRANTIES
     ------------------------------

10.1 GENERAL REPRESENTATIONS.  Each party hereby represents and warrants to the
     -----------------------                                                   
     other as follows:

        (a) DULY ORGANIZED.  It is a corporation duly organized, validly
            --------------                                              
            existing and is in good standing under the laws of the jurisdiction
            of its incorporation, is qualified to do business and is in good
            standing as a foreign corporation in each jurisdiction in which the
            conduct of its business or the ownership of its properties requires
            such qualification and has all requisite power and authority,
            corporate or otherwise, to conduct its business as now being
            conducted, to own, lease and operate its properties and to execute,
            deliver and perform this License Agreement.

        (b) DUE EXECUTION.  The execution, delivery and performance by it of
            -------------                                                   
            this License Agreement (including the grant of the ASTRA License by
            CENTAUR and of the CENTAUR Grant by ASTRA) have been duly authorized
            by all necessary corporate action and do not and will not (i)
            require any consent or approval of its stockholders, (ii) violate
            any provision of any law, rule, regulation, order, writ, judgment,
            injunction, decree, determination or award presently in effect
            having applicability to it or any provision of its charter or by-
            laws, or (iii) result in a breach of or constitute a default under
            any material agreement (including, without limitation, the CENTAUR
            Licenses), mortgage, lease, license, permit, patent or other
            instrument or obligation to which it is a party or by which it or
            its assets may 

                                      -21-
<PAGE>
 
            be bound or affected.

        (c) NO THIRD PARTY APPROVAL.  No authorization, consent, approval,
            -----------------------                                       
            license, exemption of, or filing or registration with, any court or
            governmental authority or regulatory body is required for the due
            execution, delivery or performance by it of this License Agreement
            (including the grant of the ASTRA License by CENTAUR and of the
            CENTAUR Grant by ASTRA).

        (d) BINDING AGREEMENT.  This License Agreement is a legal, valid and
            -----------------                                               
            binding obligation of such party, enforceable against it in
            accordance with its terms and conditions, except as may be limited
            by bankruptcy laws or other laws affecting the rights of creditors
            generally, and rules of law governing equitable remedies.  Each is
            not under any obligation to any person, contractual or otherwise,
            that is conflicting or inconsistent in any respect with the terms of
            this License Agreement (including the grant of the ASTRA License by
            CENTAUR and of the CENTAUR Grant by ASTRA) or that would impede the
            diligent and complete fulfillment of its obligations hereunder.

        (e) GOVERNMENTAL STATUS.  It is not debarred or suspended from receiving
            -------------------                                                 
            contracts from the United States or Swedish government or other
            governmental authority or agency.

        (f) FULL DISCLOSURE.  Each party has disclosed to the other in good
            ---------------                                                
            faith any and all material information relevant to the subject
            matter of this License Agreement and the Supply Agreement to such
            party's ability to observe and perform its obligations hereunder,
            and each party covenants on and after the Effective Date to provide
            to the other such additional material information which may, or with
            the passage of time, effect the subject matter of this License
            Agreement or the Supply Agreement or the ability of such party to
            observe and perform its obligations hereunder or thereunder.

10.2 CENTAUR REPRESENTATIONS.  CENTAUR covenants, represents and warrants to
     -----------------------                                                
     ASTRA that

        (a) CENTAUR is the owner or licensee, as the case may be, of the CENTAUR
            Technology and Product Know-How and the same are free of any liens,
            encumbrances, restrictions and other legal or equitable claims of
            any kind or nature, excepting the rights of grantors of the CENTAUR
            Licenses,

        (b) CENTAUR has the right to grant the ASTRA License,

                                      -22-
<PAGE>
 
        (c) CENTAUR has not granted and will not grant during the Term of this
            License Agreement any license or sublicense of the CENTAUR Licenses,
            CENTAUR Technology and Product Know-How in the Field,

        (d) With respect to each of the CENTAUR License(s) that (i) CENTAUR will
            fully comply with all of CENTAUR's covenants and obligations
            thereunder, (ii) to the best of its knowledge, each is in full force
            and effect, not having been amended, other than as set forth in
            Appendix 2, (iii) CENTAUR has received no oral or written
            ----------                                               
            notification of any alleged breach or default by CENTAUR, (iv)
            CENTAUR is not aware of any breach or default by any party, and (v)
            CENTAUR will not terminate or otherwise amend the CENTAUR Licenses
            (x) on less than sixty (60) days' prior written notice to ASTRA, and
            (y) in any manner which would materially adversely affect the ASTRA
            License, and

        (e) As of the Effective Date, to the best of CENTAUR's knowledge and
            belief, there are no third party rights, licenses or patents, other
            than the CENTAUR Licenses, which are necessary for ASTRA's use and
            enjoyment of the ASTRA License and the research, development,
            production, manufacture, sale or use of Licensed Products.

11.  PUBLICATIONS
     ------------

11.1 DISCLOSURE OF KNOW-HOW.  Unless as necessary for ASTRA to utilize the
     ----------------------                                               
     ASTRA License granted to ASTRA hereunder, neither party will make any
     publications of Know-How of the other party or other results developed
     hereunder without the other party's prior written approval, which approval
     shall not be unreasonably withheld.

11.2 USE OF OTHER PARTY'S NAME.  Unless as required by law and/or applicable
     -------------------------                                              
     government regulation, neither party will use the name of the other party,
     nor of any member of such party's staff, in any publicity, advertising, or
     news release without the prior written approval of an authorized
     representative of such party.

12.  MARKETING OF LICENSED PRODUCT
     -----------------------------

12.1 ASTRA'S COMMERCIALIZATION OF LICENSED PRODUCT.  ASTRA agrees to use its
     ---------------------------------------------                          
     best reasonable efforts to commercialize any Licensed Product successfully
     developed hereunder, and will keep CENTAUR continuously informed with
     respect to such 

                                      -23-
<PAGE>
 
     commercialization period.

12.2 LABELING.  Unless otherwise prohibited by regulatory authority, Licensed
     --------                                                                
     Product(s) or the packaging in which they are contained shall bear the
     label "Manufactured under license from Centaur Pharmaceuticals, Inc., 484
     Oakmead Parkway, Sunnyvale, CA 94086, USA", or any similar wording as may
     be mutually agreed upon by the parties.

13.  INVENTION, IMPROVEMENTS AND DISCOVERIES
     ---------------------------------------

13.1 OWNERSHIP OF TECHNOLOGY. The parties shall keep each other apprised on 
     -----------------------
     the development of patentable and other inventions in the Field. Each party
     shall retain sole title to any technology, know-how, inventions, concepts,
     processes and the like (whether or not patentable) which it develops
     solely. Except as provided in this License Agreement, neither party shall
     have any right to use or license technology to which the other party has
     sole title. Each party shall own a fifty percent (50%) undivided interest
     in all technology, know-how, inventions, concepts, processes and the like
     (whether or not patentable) made, conceived, reduced to practice or
     generated jointly in connection with the Project Work by (i) one party
     and/or Third Persons obligated to assign their rights therein to such
     party, and (ii) the other party and/or Third Persons obligated to assign
     their rights therein to such other party (collectively the "JOINT PROJECT
     TECHNOLOGY"). Such Joint Project Technology, to the extent in the Field,
     shall be used by each party exclusively within the context of this License
     Agreement and the Supply Agreement, provided, however, either party may use
     such Joint Project Technology outside the Field, as such party deems
     appropriate.

14.  PATENTS AND PATENT APPLICATIONS
     -------------------------------

14.1 MAINTENANCE OF CENTAUR PATENTS.  CENTAUR shall diligently prosecute and
     ------------------------------                                         
     maintain, at CENTAUR's sole cost and expense, the CENTAUR Patents unless,
     with regard to one or more patents comprising the CENTAUR Patents, the
     parties agree that such is not necessary or commercially advisable. If
     CENTAUR fails to diligently prosecute, maintain and defend the CENTAUR
     Patents, ASTRA may (but shall not be obligated to), upon notice to CENTAUR,
     undertake such prosecution, maintenance and defense of the CENTAUR Patents,
     and all costs incurred by ASTRA in such regard may be deducted from Net
     Sales royalty payable to CENTAUR hereunder from countries where such
     Centaur patents are being prosecuted and maintained over a three (3) year
     period.

14.2 CENTAUR NEW INVENTIONS PATENTS.  If ASTRA, in its sole discretion, and
     ------------------------------                                        
     following 

                                      -24-
<PAGE>
 
     consultation with CENTAUR, determines that any invention of CENTAUR in the
     Field, developed solely by CENTAUR (as opposed to Joint Patents) not
     already covered by the CENTAUR Patents in one or more countries, is
     patentable (the "NEW INVENTIONS PATENTS"), CENTAUR shall, upon notice from
     ASTRA, promptly prepare, file, and prosecute in CENTAUR's name patent
     application(s) and/or any related continuation, continuation-in-part,
     divisional, and/or reissue application(s) thereof, with respect to such
     invention in such countries as selected by ASTRA. ASTRA shall reimburse
     CENTAUR for all out-of-pocket expenses incurred in connection with the
     above preparation, filing, and prosecution of application(s) and
     maintenance of New Inventions Patents directed to such inventions in the
     countries chosen by ASTRA. ASTRA shall cooperate with CENTAUR to assure
     that such application(s) and any related continuation, continuation-in-
     part, divisional, and/or reissue applications(s) thereof, will cover, to
     the best of ASTRA's knowledge, all items of commercial interest and
     importance and ASTRA shall have the right, through ASTRA's patent attorneys
     and/or agents, to advise and cooperate with CENTAUR's patent attorneys in
     the prosecution of such patent applications. In the event CENTAUR shall
     fail to prepare, file and prosecute any New Inventions Patents, ASTRA may
     (but shall not be obligated to) undertake such preparation, filing and
     prosecution of the New Inventions Patents in CENTAUR's name, at ASTRA's
     sole cost and expense.

14.3 JOINT PATENTS.  If ASTRA, in its sole discretion and following
     -------------                                                 
     consultation with CENTAUR, determines that any invention made jointly by
     the parties (a "JOINT PATENT") is patentable, ASTRA shall, at its expense
     and discretion, promptly prepare, file and prosecute in both parties' names
     patent application(s) and/or any related continuation, continuation-in-
     part, divisional, and/or reissue application(s) thereof, in the United
     States and in such foreign countries selected by ASTRA, with respect to
     such joint invention. CENTAUR shall have the right, through CENTAUR's
     patent attorneys and/or agents, to advise and cooperate with ASTRA's patent
     attorneys in the prosecution of such patent applications. ASTRA and CENTAUR
     agree to use all Joint Patents exclusively within the context of this
     License Agreement. Should the inventions, improvements and/or discoveries
     referred to in Section 14.3 fall within the definition of Know-How or if
     same are patentable, then they shall be used exclusively within the context
     of this License Agreement and the Supply Agreement if within the Field.
     Either party may use such inventions, improvements and/or discoveries which
     are outside the Field, whether or not patentable, as such party may deem
     appropriate.

        (a) JOINT PATENT - ASTRA DEFAULT OR BANKRUPTCY.  In the event this
            ------------------------------------------                    
            License Agreement is terminated as a result of a Default or
            Bankruptcy by ASTRA, then such joint inventions, improvements and/or
            discoveries whether existing as Know-How or as a patent application
            or patent, and ASTRA's interests in the Joint Patents will be
            automatically exclusively licensed, royalty-free, to 

                                      -25-
<PAGE>
 
            CENTAUR to develop, use, market, distribute and sell Licensed
            Product(s) worldwide in the Field. In addition, should this License
            Agreement be terminated with respect to only one of the Projects in
            accordance with Section 20.4, then such inventions, improvements
            and/or discoveries related to the terminated Project as well as
            ASTRA's interests in the Joint Patents related to the terminated
            Project will be automatically exclusively licensed in the Field to
            CENTAUR, royalty-free.

        (b) JOINT PATENT - CENTAUR DEFAULT OR BANKRUPTCY.  In the event this
            --------------------------------------------                    
            License Agreement is terminated as a result of a Default or
            Bankruptcy by CENTAUR, then such joint inventions, improvements
            and/or discoveries whether existing as Know-How or as a patent
            application or patent, and CENTAUR's interests in the Joint Patents
            will be automatically exclusively licensed to ASTRA to develop, use,
            market, distribute and sell Licensed Product(s) worldwide in the
            Field, subject to the royalty obligations provided herein.



14.4 NOTIFICATION WITH RESPECT TO PATENTS.  Each party shall keep the other
     ------------------------------------                                  
     advised as to all developments with respect to any patent application(s)
     referred to in this Section 14, and shall promptly supply to the other
     copies of relevant papers received and filed by it in connection with the
     prosecution thereof in sufficient time for such party to comment thereon.
     The parties shall reasonably cooperate and assist each other in the patent
     prosecution provided for in this Section 14.

14.5 CENTAUR'S ELECTION.  If ASTRA elects, with regard to CENTAUR Patents, New
     ------------------                                                       
     Inventions Patents, or Joint Patents not to have CENTAUR seek or maintain
     patent protection in one or more countries, CENTAUR will have the right, at
     CENTAUR's sole expense and discretion, to file, procure, maintain and
     enforce such patents in such countries and ASTRA will cooperate fully. The
     parties agree that should CENTAUR exercise said right it will not in any
     way affect the ASTRA License granted hereunder other than should ASTRA or
     its sublicensees later sell a Licensed Product, the sale of which would
     infringe such patent procured by CENTAUR at its own expense, ASTRA will
     reimburse CENTAUR for its patent out-of-pocket expenses, plus twenty
     percent (20%) thereof related to the relevant country or countries. ASTRA
     agrees to advise CENTAUR in a timely manner of any decision not to continue
     to seek or maintain, or have CENTAUR continue to seek, or to maintain
     patent protection with respect to CENTAUR Patents, New Inventions Patents
     or Joint Patents in one or more countries in order to allow CENTAUR the
     timely exercise of its rights under this Section 14.5.

14.6 ASTRA'S ELECTION.  Notwithstanding the provisions of Section 14.2, New
     ----------------                                                      
     Inventions Patents and New Chemical Entity Patents shall not be deemed to
     be "CENTAUR 

                                      -26-
<PAGE>
 
     Patents" for purposes of determining the period during which ASTRA shall
     pay royalty to CENTAUR on Net Sales of Licensed Product pursuant to Section
     7.5, unless (i) ASTRA's manufacture, use or sale of Licensed Product in a
     particular country would infringe such New Inventions Patents or New
     Chemical Entity Patents, or (ii) ASTRA shall, in ASTRA's sole discretion,
     agree that such New Inventions Patents and/or New Chemical Entity Patents
     shall be deemed to be "CENTAUR Patents" for purposes of Section 7.5.

14.7 MINIMUM PATENT PROTECTION.  Unless extraordinary circumstances require
     -------------------------                                             
     otherwise, patent protection is to be sought and upheld on inventions
     falling under the license herein granted in at least the countries in which
     ASTRA Affiliates are established.

15.  PATENT INFRINGEMENTS
     --------------------

15.1 NOTIFICATION OF ALLEGED PATENT INFRINGEMENT.  If a third party notifies
     -------------------------------------------                            
     CENTAUR, ASTRA or its sublicensees that any act by either party allegedly
     infringes any patent owned by the third party or any patent rights owned by
     or licensed to the third party, CENTAUR or ASTRA, as the case may be, shall
     promptly notify the other in writing.

15.2 THIRD PARTY CLAIMS.  In the event of a third party claim that the exercise
     ------------------                                                        
     of the ASTRA License with respect to the manufacture, sale or other use of
     Licensed Product infringes any patent of such third party (a "THIRD PARTY
     CLAIM"), CENTAUR shall consult with ASTRA and with respect to such Third
     Party Claim, CENTAUR shall (i) undertake, at CENTAUR's sole cost and
     expense, defense of such Third Party Claim, or (ii) request ASTRA to
     undertake such defense, at ASTRA's sole cost and expense. Neither ASTRA nor
     CENTAUR shall settle any Third Party Claim, including an agreement to pay
     Third Party Royalties, without the reasonable approval of the other party.
     If ASTRA shall, at ASTRA's sole cost and expense, undertake to defend such
     Third Party Claim, fifty percent (50%) of all costs and expenses incurred
     by ASTRA, including, without limitation, expert witness and attorneys'
     fees, and such damages payable to any third party (other than Third Party
     Royalties) shall be deducted from Net Sales royalties payable to CENTAUR
     hereunder from countries where such Third Party Claim claims infringement,
     over a three (3) year period.

15.3 PAYMENT OF ADDITIONAL THIRD PARTY ROYALTIES.  Should ASTRA or its
     -------------------------------------------                      
     sublicensees obtain one or more licenses under any patent not licensed
     hereunder and agree to pay Third Party Royalties in order to make, use or
     sell a Licensed Product (whether as a condition of settlement of an
     infringement action or by court order), the Net Sales royalties payable to
     CENTAUR hereunder shall be reduced by fifty percent (50%) of such Third
     Party Royalties as set forth in Section 7.6.

                                      -27-
<PAGE>
 
15.4 INFRINGEMENT OF CENTAUR PATENTS/JOINT PATENTS/NEW INVENTIONS PATENTS.  If
     --------------------------------------------------------------------     
     a third party shall, in the reasonable opinion of either party, infringe
     any CENTAUR Patent, Joint Patent or New Inventions Patents, then such party
     shall promptly notify the other party. ASTRA or its sublicensees shall have
     the initial sole right to commence an action for infringement against the
     third party, in its own name and/or in the name of CENTAUR, together with
     the right to enforce and collect any judgment thereon. If ASTRA or its
     sublicensee elects to exercise the right to commence an action, then
     CENTAUR shall, at ASTRA's request and at ASTRA's expense, assist in the
     prosecution of such action, including, but not limited to, consenting to
     being joined in such action as a voluntary plaintiff. ASTRA shall bear its
     own internal and external legal and other costs and expenses associated
     with the prosecution of the action. CENTAUR shall have the right to
     independently retain legal counsel and consultants, at CENTAUR's sole cost
     and expense, but such counsel or consultants shall not have the right to
     affect ASTRA's or its sublicensee(s) sole management of the prosecution of
     the action.

15.5 MONETARY RECOVERY - ASTRA PROSECUTION.  Any monetary recovery (whether by
     -------------------------------------                                    
     settlement or judgment) in connection with an infringement action commenced
     by ASTRA or ASTRA's sublicensees shall be applied first to reimburse ASTRA
     and its sublicensees, if applicable, for their out-of-pocket expenses
     (including reasonable attorneys' fees) incurred in prosecuting such action
     and the expenses of CENTAUR borne by ASTRA hereunder. Any balance remaining
     shall be shared in the ratio of 80:20 (ASTRA:CENTAUR, respectively).

15.6 MONETARY RECOVERY - CENTAUR PROSECUTION.  Should neither ASTRA, its
     ---------------------------------------                            
     Affiliates nor its sublicensees take appropriate and diligent action with
     respect to any such infringement within three (3) months after receiving
     notice of any infringement or possible infringement of a CENTAUR Patent,
     Joint Patent or New Inventions Patents, CENTAUR shall have the right, but
     not the obligation, to take such action, at its own expense, in its own
     name, and the right to enforce and collect any judgment thereon. If the
     recovery exceeds CENTAUR's out-of-pocket expenses (including reasonable
     attorneys' fees) for prosecuting the claim, then such excess recovery shall
     be shared by the parties in the ratio of 80:20 (CENTAUR:ASTRA,
     respectively).

16.  CONFIDENTIALITY
     ---------------

16.1 TREATMENT OF CONFIDENTIALITY.  A party receiving Confidential Information
     ----------------------------                                             
     of the other party shall maintain such Confidential Information in strict
     confidence and shall not disclose the Confidential Information to any third
     party. Furthermore, neither party shall use the Confidential Information
     for any purpose other than those purposes specified in 

                                      -28-
<PAGE>
 
     this License Agreement. The parties may disclose Confidential Information
     to the minimum number of its employees reasonably requiring access thereto
     for the purposes of this License Agreement, provided, however, that prior
     to making such disclosures, each such employee shall be apprised of the
     duty and obligation to maintain Confidential Information in confidence and
     not to use such Confidential Information for any purpose other than in
     accordance with the terms and conditions of this License Agreement.

16.2 RELEASE FROM RESTRICTIONS. The provisions of Section 16.1 shall not apply
     -------------------------
     to any Confidential Information disclosed hereunder which is required to be
     disclosed by the receiving party to comply with applicable laws, or to
     comply with laws or regulations (including, without limitation, testing and
     marketing regulations), in each case only to the extent required to carry
     out the work contemplated by this License Agreement or other legal
     obligations provided that the receiving party provides prior written notice
     of such disclosure to the other party and takes reasonable and lawful
     actions to avoid and/or minimize the degree of such disclosure.

17.  TRADEMARK
     ---------

     ASTRA shall market, distribute and sell Licensed Product under trademarks
     selected and owned by ASTRA and to which CENTAUR shall have no reasonable
     objections.

18.  EXCLUSIVITY AND OPTION TO EXTEND THE LICENSE
     --------------------------------------------

18.1 RESTRICTIONS. During the Term of this License Agreement and the Supply
     ------------
     Agreement (i) neither party shall sell any products or provide any service
     in the Field other than Licensed Product, or conduct any research alone
     (excepting as provided in this Section 18.1), or with third parties or fund
     research by third parties in the Field, except research conducted pursuant
     to the Research Program, and (ii) CENTAUR shall not grant any license or
     sublicense in the Field of (w) CENTAUR Technology, (x) Product Know-How,
     (y) the CENTAUR Licenses in the Field, or (z) any right which would
     materially adversely affect ASTRA's use and enjoyment of the ASTRA License,
     and (iii) ASTRA will not grant any license or sublicense of any right which
     would materially, adversely affect CENTAUR's use and enjoyment of the
     CENTAUR Grant in the Field. The foregoing restrictions shall not prohibit
     either party from conducting research, either alone or with third parties,
     that has applicability outside the Field, notwithstanding that such
     research may also have utility in the Field. CENTAUR further acknowledges
     that ASTRA has, and may continue to undertake research, development and
     marketing of products outside the Field which may have indications for use
     comparable to Licensed Product.

                                      -29-
<PAGE>
 
18.2 ASTRA RIGHT OF FIRST NEGOTIATION.  ASTRA acknowledges that CENTAUR may
     --------------------------------                                      
     undertake research, development and marketing of products outside the Field
     which may have indications for use comparable to Licensed Product.
     Notwithstanding the foregoing, CENTAUR will not enter into any agreement or
     collaboration with any third party with respect to the development,
     manufacture or sale of any substance or product outside the Field, but
     falling within ASTRA's strategic research areas and/or such other research
     areas of interest to ASTRA as set forth on Appendix 4 hereof, and as the
                                                ----------                   
     same may be modified from time to time by ASTRA in writing, without, in the
     first instance, CENTAUR providing ASTRA by written notice with a right of
     first negotiation with CENTAUR. ASTRA shall, within sixty (60) days of
     written notification from CENTAUR, either (i) waive such right of first
     negotiation, or (ii) enter into discussions with CENTAUR in which the
     parties shall diligently and in good faith seek to agree upon the terms and
     conditions of such agreement and/or collaboration. Should the parties not
     reach agreement within one hundred twenty (120) days (which period may be
     extended by mutual agreement of the parties), CENTAUR shall be free to
     enter into negotiations and/or agreements or collaborations with third
     parties.

19.  WARRANTY DISCLAIMER
     -------------------

19.1 DISCLAIMER BY PARTIES.  Other than with respect to the provisions of this
     ---------------------                                                    
     License Agreement and the Supply Agreement, nothing in this License
     Agreement shall be construed as:

        (a) CENTAUR TECHNOLOGY/PRODUCT KNOW-HOW.  A warranty or representation
            -----------------------------------                               
            by CENTAUR as to the validity or scope of the CENTAUR Technology or
            Product Know-How, other than as specifically provided to the
            contrary herein,

        (b) THIRD PARTY INFRINGEMENT.  A warranty or representation that
            ------------------------                                    
            anything made, used, sold or otherwise disposed of under this
            License Agreement is or will be free from infringement of patents,
            copyrights and trademarks of third parties,

        (c) PROSECUTION.  An obligation to bring or prosecute actions or suits
            -----------                                                       
            against third parties for infringement,

        (d) USE OF NAME/TRADEMARK.  Conferring rights to use in advertising,
            ---------------------                                           
            publicity or otherwise any trademark or the name of CENTAUR or
            ASTRA,

                                      -30-
<PAGE>
 
        (e) CENTAUR LIMITATION.  Granting by implication, estoppel or otherwise
            ------------------                                                 
            any licenses under (i) patents of CENTAUR other than the CENTAUR
            Patents, and (ii) the CENTAUR Patents and Know- How outside the
            Field.  Except as expressly set forth in this License Agreement
            and/or the Supply Agreement, CENTAUR makes no representations and
            extends no warranties of any kind, either express or implied.  There
            are no express or implied warranties of merchantability or fitness
            for a particular purpose, or that the use of the Licensed Product
            will not infringe any third party patent, copyright, trademark or
            other rights,

        (f) ASTRA LIMITATION.  Except as expressly set forth in this License
            ----------------                                                
            Agreement, ASTRA makes no representations and extends no warranties
            of any kind, either express or implied.  There are no express or
            implied warranties of merchantability or fitness for a particular
            purpose, or that the use of the Licensed Product will not infringe
            any patent, copyright or trademark or other rights.

20.  TERM AND TERMINATION
     --------------------
20.1 TERM. The Term of this License Agreement (the "TERM") shall commence as of
     ----
     the Effective Date. Unless sooner terminated pursuant to Section 20.2, 20.3
     or 20.4, the Term shall expire at such time as ASTRA shall have no further
     obligation to make payments to CENTAUR on Net Sales of Licensed Product
     pursuant to Section 7.5.

20.2 DEFAULT. Other than as provided in Section 6.6, failure by either party to
     -------
     comply with any of its material obligations contained in this License
     Agreement following notice and opportunity to cure, as hereinafter provided
     (a "DEFAULT") shall entitle the other party to terminate this License
     Agreement. The non-defaulting party shall give the other party notice
     specifying the nature of the breach of this License Agreement and requiring
     it to cure. If such breach is not cured within ninety (90) days after the
     receipt of such notice (or one hundred twenty (120) days in event such
     breach cannot be reasonably expected to be cured within ninety (90) days,
     and the defaulting party gives notice to the other party of its inability
     to cure such breach within a 90-day period and the defaulting party
     thereafter uses reasonable efforts to cure such breach as soon as
     practicable, but in no event longer than one hundred twenty (120) days),
     the notifying party shall be entitled, without prejudice to any of its
     other rights under this License Agreement, and in addition to any other
     remedies available to it by law or in equity, to terminate this License
     Agreement by giving notice to that effect to the defaulting party. The
     right of either party to terminate this License Agreement, as hereinabove
     provided, shall not be affected in any way by its waiver or failure to take
     action with respect to any previous Default. 

                                      -31-
<PAGE>
 
     Notwithstanding the foregoing, and other than as provided in Section 20.3
     and 20.4, a party shall not have a right to terminate this License
     Agreement in the event the other party pursuant to Section 22 has sought to
     resolve the dispute for which termination is being sought.

20.3 INSOLVENCY OR BANKRUPTCY. Either party may, in addition to any other
     ------------------------
     remedies available to it by law or in equity, terminate this License
     Agreement by written notice to the other party in the event (i) the other
     party shall have become insolvent or bankrupt, or shall have made an
     assignment for the benefit of its creditors, or (ii) there shall have been
     appointed a trustee or receiver of the other party or for all or a
     substantial part of its property, or (iii) any case or proceeding shall
     have been commenced or some other action taken by or against the other
     party in bankruptcy or seeking reorganization, liquidation, dissolution,
     winding-up, arrangement, composition or readjustment of its debts or any
     other relief under any bankruptcy, insolvency, reorganization or other
     similar act or law of any jurisdiction now or hereafter in effect or there
     shall have been issued a warrant of attachment, execution, distraint or
     similar process against any substantial part of the property of the other
     party, and any such event or action (except where a party voluntarily takes
     such actions (e.g., where a party makes a bankruptcy filing)) shall have
                   ----
     continued for ninety (90) days undismissed, unbounded and undischarged
     (alternatively a "BANKRUPTCY"); provided, however, that no such right to
     terminate shall pertain solely by virtue of a voluntary reorganization for
     the purpose of solvent amalgamation or reconstruction.

20.4 SPECIAL TERMINATION PROVISIONS. ASTRA shall have the right to terminate
     ------------------------------
     this License Agreement partially or entirely with respect to a specific
     Project, at any time, for any reason, upon twelve (12) months' prior notice
     to CENTAUR following the second R&D Period, provided, however, that ASTRA
     may terminate this License Agreement with respect to a specific indication
     for use of SP at any time, for any reason upon twelve (12) months' prior
     notice to CENTAUR, although the Annual Funding shall remain the same.
     Should a specific Project (i.e., either SP or AP) be terminated, while the
     other Project remains, research funds will be reallocated to the remaining
     Project (or to a substitute project if such is mutually agreed upon by the
     parties) but at a reduced minimum Annual Funding of [*], as adjusted in
     accordance with Section 5. If this License Agreement is terminated with
     respect to only one of the Projects, the scope of the Field and other terms
     of this License Agreement shall be modified accordingly, including that all
     rights with regard to such Project or such indication or use with respect
     to SP as terminated, will revert to CENTAUR.

20.5 EFFECT OF TERMINATION OF LICENSE AGREEMENT.
     ------------------------------------------ 

        (a) EXISTING OBLIGATIONS.  Upon termination of this License Agreement
            --------------------                                             
            for any 

                                      -32-
<PAGE>
 
            reason, nothing herein shall be construed to release either party
            from any obligation that matured prior to the effective date of such
            termination.

        (b) EXPIRATION OF TERM OR CENTAUR DEFAULT OR BANKRUPTCY.  Upon
            ---------------------------------------------------       
            termination of this License Agreement (i) at the expiration of the
            Term, or (ii) by ASTRA as a result of (x) a Default by CENTAUR
            hereunder, or (y) the Bankruptcy of CENTAUR, the following
            provisions of this License Agreement shall survive such termination:

            Section 2.1  -  License Grant to ASTRA - ASTRA License
            Section 2.4  -  Oklahoma/Kentucky License
            Section 14.1 -  Ownership of Technology
            Section 15.3 -  Joint Patents
            Section 16   -  Confidentiality
            Section 21.12-  CENTAUR Indemnification
            Section 21.14-  Governing Law
            Section 22   -  Resolution of Disputes

        (c) EXPIRATION OF TERM OR ASTRA DEFAULT OR BREACH.  Upon termination of
            ---------------------------------------------                      
            this License Agreement (i) at the expiration of the Term, or (ii) by
            CENTAUR as a result of (x) a Default by ASTRA hereunder, or (y) the
            Bankruptcy of ASTRA, the following provisions of this License
            Agreement shall survive such termination:

            Section 2.3  -  License Grant to CENTAUR - CENTAUR Grant
            Section 14.1 -  Ownership of Technology
            Section 15.3 -  Joint Patents
            Section 16   -  Confidentiality
            Section 21.11-  ASTRA Indemnification
            Section 21.14-  Governing Law
            Section 22   -  Resolution of Disputes

21.   MISCELLANEOUS PROVISIONS
      ------------------------

21.1  NO PARTNERSHIP. Nothing in this License Agreement is intended or shall be
      --------------
      deemed to constitute a partnership, agency, employer, employee or joint
      venture relationship between the parties. Neither party shall incur any
      debts or make any commitments for the other.

21.2  ASSIGNMENTS. Except as otherwise provided herein, neither this License 
      -----------
      Agreement nor

                                      -33-
<PAGE>
 
      any interest hereunder shall be assignable by either party by operation of
      law or otherwise without the prior written consent of the other; provided,
      however, that either party may assign this License Agreement to any 
      wholly-owned subsidiary or to any successor by merger or sale of
      substantially all of its assets to which this License Agreement relates in
      a manner such that the assignor shall remain liable and responsible for
      the performance and observance of all its duties and obligations
      hereunder, or if the assignor disappears because of such transaction, the
      assignee must agree to abide by the terms and conditions of this License
      Agreement, provided, however, that if a third party engaged in the
      manufacture and/or sale of pharmaceutical products acquires in one (1) or
      a series of transactions more than thirty percent (30%) of the capital
      stock of CENTAUR entitled to vote for directors (a "TAKEOVER EVENT"),
      ASTRA may, at its option, within one hundred eighty (180) days following
      notice to ASTRA of such Takeover Event, upon twelve (12) months' prior
      notice to CENTAUR, cease Annual Funding, in which event ASTRA shall
      undertake (i) to reasonably complete the Project Work on its own, and (ii)
      manufacture (or have manufactured) Substance for Licensed Product for
      ASTRA's (and ASTRA's sublicensees) use worldwide as provided in the Supply
      Agreement. ASTRA will make payments pursuant to Section 7.2 and Net Sales
      royalty payments to CENTAUR pursuant to Section 7.3, until such time as
      ASTRA's obligation to pay Net Sales royalties terminates pursuant to
      Section 7.5.

21.3  FORCE MAJEURE. Neither party shall be liable to the other for loss or
      -------------
      damages or shall have any right to terminate this License Agreement for
      any default or delay (including, without limitation, an inability to
      supply Licensed Product) attributable to any act of God, earthquake,
      flood, fire, explosion, strike, lockout, labor dispute, casualty or
      accident, war, revolution, civil commotion, act of public enemies,
      blockage or embargo, injunction, law, order, proclamation, regulation,
      ordinance, demand or requirement of any government or subdivision,
      authority (including, without limitation, drug regulatory authorities) or
      representative of any such government, or any other cause beyond the
      reasonable control of such party, if the party affected shall give prompt
      notice of any such cause to the other party. The party providing such
      notice shall thereupon be excused from such of its obligations hereunder
      as it is so disabled and for thirty (30) days thereafter. Notwithstanding
      the foregoing, nothing in this Section 21.3 shall excuse or suspend the
      obligation to make any payment due hereunder in the manner and at the time
      provided.

21.4  NO TRADEMARK RIGHTS.  No right, express or implied, is granted by this
      -------------------
      License Agreement to use in any manner any trade name or trademark of
      CENTAUR or ASTRA in connection with the performance of this License
      Agreement or the exploitation of any license granted hereunder; each party
      may make any legally required reference to the other in connection with
      such manufacture or sale of Licensed Product.

                                      -34-
<PAGE>
 
21.5 PUBLIC ANNOUNCEMENTS.  Copies of press releases or similar written
     --------------------
     communications containing a party's name shall be provided to that party
     prior to release.

21.6 ENTIRE AGREEMENT OF THE PARTIES AND AMENDMENT.  This License Agreement and
     ---------------------------------------------
     the Supply Agreement together with the Project Work to be entered into as
     provided herein constitutes and contains the entire understanding and
     agreement of the parties, and cancel and supersede any and all prior
     negotiations, correspondence and understandings and agreements, whether
     verbal or written, between the parties respecting the subject matter
     hereof. No waiver, modification or amendment of any provision of this
     License Agreement shall be valid or effective unless made in writing and
     signed by a duly authorized officer of each of the parties.

21.7 SEVERABILITY.  In the event any one or more of the provisions of this
     ------------
     License Agreement should for any reason be held by any court or authority
     having jurisdiction over this License Agreement or either of the parties to
     be invalid, illegal or unenforceable, such provision or provisions shall be
     validly reformed by addition or deletion of wording as appropriate to avoid
     such result and as nearly as possible approximate the intent of the parties
     and, if unreformable, shall be divisible and deleted in such jurisdiction
     to the extent necessary to comply with such holding, and in all other
     jurisdictions this License Agreement shall not be affected; provided,
     however, that no such reformation shall be made if the effect of such
     reformation would be such as to fundamentally alter the terms of this
     License Agreement beyond the intent of the parties.

21.8 CAPTIONS.  The captions to this License Agreement are for convenience
     --------
     only, and are to be of no force or effect in construing or interpreting any
     of the provisions of this License Agreement.

21.9 NOTICE AND DELIVERY.  Any notice, requests, delivery, approval or consent
     -------------------
     required or permitted to be given under this License Agreement shall be in
     writing and shall be deemed to have been sufficiently given if delivered in
     person, delivered by internationally recognized courier, telegraph or sent
     by registered air mail letter to the party (which notice shall be
     considered effective when received) to whom it is directed at its address
     shown below, or such other address as such party shall have last given by
     notice to the other party.

        If to CENTAUR, addressed to:

        President and Chief Executive Officer
        Centaur Pharmaceuticals, Inc.
        484 Oakmead Parkway
        Sunnyvale CA 94086, USA

                                      -35-
<PAGE>
 
        If to ASTRA, addressed to:

        President and Chief Executive Officer
        ASTRA AB
        S-151 85 Sodertalje
        Sweden

21.10  LIMITATION OF LIABILITY.  Neither party shall be liable to the other for
       -----------------------
       indirect, incidental or consequential damages arising out of any of the
       terms or conditions of this License Agreement or with respect to its
       performance or lack thereof, except in the case of a Default resulting
       from any reckless and intentional breach of its material obligations
       hereunder.

21.11  ASTRA INDEMNIFICATION.  ASTRA shall indemnify, defend and hold CENTAUR
       ---------------------
       and each of its officers, directors, employees, agents and consultants
       and their respective heirs and assigns (each a "CENTAUR INDEMNITEE")
       harmless from and against all third party costs, claims, suits, expenses
       (including reasonable attorneys' fees) and damages arising out of or
       resulting from (i) the development, testing, manufacture, sale, use or
       promotion by ASTRA, or ASTRA's sublicensees, of any Licensed Product,
       (ii) a claim of product liability with respect to a Licensed Product
       (including, without limitation, a cause of action in the form of tort,
       warranty or strict liability), (iii) arising out of any other activity
       carried out by ASTRA or ASTRA's sublicensees pursuant to this License
       Agreement, provided, however, that the CENTAUR Indemnitee gives
       reasonable notice to ASTRA of any such claim or action, tenders the
       defense of such claim or action to ASTRA and assists ASTRA, at ASTRA's
       expense, in defending such claim or action and does not compromise or
       settle such claim or action without ASTRA's prior written consent,
       provided, further, however, that ASTRA's indemnification of CENTAUR
       hereunder shall not extend to any cost, claim, suit, expense or damage
       which arises or results from any gross negligence or intentional
       misconduct of CENTAUR, or any third party for whom CENTAUR is
       responsible, in the manufacture of Substance for Licensed Product by
       CENTAUR, which results in the failure of CENTAUR to manufacture Substance
       for Licensed Product in accordance with the Specifications.

21.12  CENTAUR INDEMNIFICATION.  CENTAUR shall indemnify, defend and hold ASTRA
       -----------------------
       and each of its officers, directors, employees, agents and consultants
       (and their respective heirs and assigns) (each an "ASTRA INDEMNITEE")
       harmless from any gross negligence or intentional misconduct of CENTAUR,
       or any third party for whom CENTAUR is responsible (i) in the manufacture
       of Substance for Licensed Product by CENTAUR, which results in the
       failure of CENTAUR to manufacture Substance for Licensed Product in
       accordance with the Specifications, and (ii) arising out of 

                                      -36-
<PAGE>
 
       CENTAUR's Co-Promote pursuant to Section 8, and provided, further, that
       the ASTRA Indemnitee gives reasonable notice to CENTAUR of any such
       claims or action, tenders the defense of such claim or action to CENTAUR
       and assists CENTAUR at CENTAUR's expense in defending such claim or
       action and does not compromise or settle such claim or action without
       CENTAUR's prior written consent.

21.13  REMEDIES CUMULATIVE.  Except as provided in Section 6.6, the remedies
       -------------------
       provided hereunder are cumulative and not exclusive.

21.14  GOVERNING LAW.  This License Agreement shall be governed by and construed
       -------------
       in accordance with the laws of the State of New York without regard to
       the conflict of laws provisions thereof.

22.    RESOLUTION OF DISPUTES
       ----------------------

22.1   GENERAL.  In acknowledgment of the benefit to both parties to resolve
       -------
       differences quickly and efficiently with as little disruption of each
       parties' business as possible, the parties agree to abide by the
       following provisions in connection with any dispute that should arise
       between the parties with respect to any matter relating to this License
       Agreement or the Supply Agreement, including any questions regarding the
       existence, validity or termination thereof.


22.2  DISPUTE RESOLUTION PROCESS.
      --------------------------

      (a) SELECTION OF ARBITRATORS.  In the event that the parties are unable to
          ------------------------                                              
          resolve a dispute within thirty (30) days after commencement of
          mediation efforts by members of senior management (as described in
          Section 3.4), either party may submit the matter to binding
          arbitration in accordance with the procedures set forth in this
          Section 22.2. If a party intends to commence arbitration to resolve a
          dispute, such party shall provide written notice to the other party of
          such intention, and shall designate one arbitrator. Within ten (10)
          days of receipt of such notice, the other party shall designate in
          writing a second arbitrator. The two arbitrators so designated shall,
          within ten (10) days thereafter, designate a third arbitrator. The
          arbitrators so designated shall not be employees, consultants,
          officers, directors or shareholders of or otherwise associated with
          either party or an Affiliate of either party. Except as modified by
          the provisions of this Section 22, the arbitration shall be conducted
          in accordance with the then rules of commercial arbitration of and
          before the American Arbitration Association in New York, New York. The
          language of such arbitration shall be English and all notices and
          written submissions provided in such proceeding shall be in English.

                                      -37-
<PAGE>
 
      (b) WRITTEN PROPOSALS.  Within thirty (30) days after the designation of
          -----------------                       
          the third arbitrator, the arbitrators and the parties shall meet, at
          which time each party shall be required to set forth in writing the
          issues which need to be resolved and a proposed ruling on each such
          issue. Written submissions shall be limited to 30 pages of text (not
          including exhibits which may include copies of agreements, or extracts
          from books and records, but including testimony affidavits).

      (c) HEARING.  The arbitrators shall set a date for a hearing, which shall
          -------   
          be no later than thirty (30) days after the submission of written
          proposals, to discuss each of the issues identified by the parties.
          Each party shall have the right to be represented by counsel. The
          arbitrators shall have sole discretion with regard to the
          admissibility of any evidence. Unless otherwise determined by
          unanimous agreement of the arbitrators the hearing shall be concluded
          in one (1) day unless the arbitrators conclude by majority vote that
          the hearing should be extended to avoid working an injustice to one of
          the parties.

      (d) RULING.  The arbitrators shall use their best efforts to rule on each
          ------                                                               
          disputed issue within thirty (30) days after the completion of the
          hearings described in subsection (c) above. The arbitrators shall, by
          majority decision, select the ruling proposed by one of the parties as
          the arbitrators' ruling. The arbitrators' ruling shall be, in the
          absence of fraud or manifest error, binding and conclusive upon both
          parties and may be enforced in a court of competent jurisdiction. The
          arbitrators may not award punitive or exemplary damages.

22.3  ARBITRATION COSTS.  The arbitrators shall be paid a reasonable fee plus
      -----------------
      expenses, which fees and expenses shall be paid as designated by the
      arbitrators or if the arbitrators do not so designate, such costs shall be
      shared equally by the parties.

22.4  ATTORNEYS' FEES/COSTS.  If any arbitration, litigation, or other legal
      ---------------------                                                 
      proceeding occurs between the parties relating to this License Agreement,
      the prevailing party shall be entitled to recover (in addition to any
      other relief awarded or granted) its reasonable costs and expenses,
      including attorneys' fees, incurred in the proceeding.



IN WITNESS WHEREOF, this License Agreement has been duly executed as of June 26,
1995.



ASTRA AB                                CENTAUR PHARMACEUTICALS, INC.
(PUBL)

                                      -38-
<PAGE>
 
  /s/ Hakan Mogren                        /s/ Brian D. Frenzel
- ------------------                      ----------------------
Name: Hakan Mogren                      Name:  Brian D. Frenzel
Title: President and                    Title: President and
       Chief Executive Officer                 Chief Executive Officer

                                      -39-
<PAGE>
 
                                  APPENDIX 1
                                  ----------
                                      TO
                 DEVELOPMENT, LICENSE AND MARKETING AGREEMENT
                              DATED JUNE 26, 1995
                                    BETWEEN
                         CENTAUR PHARMACEUTICALS, INC.
                                      AND
                                   ASTRA AB
                                        
                               SUPPLY AGREEMENT
                               ----------------



               [SEE EXHIBIT 10.14 TO THE REGISTRATION STATEMENT]
<PAGE>
 
                                  APPENDIX 2
                                  ----------
                                      TO
                 DEVELOPMENT, LICENSE AND MARKETING AGREEMENT
                              DATED JUNE 26, 1995
                                    BETWEEN
                         CENTAUR PHARMACEUTICALS, INC.
                                      AND
                                   ASTRA AB
                                        
                CENTAUR LICENSES PREVIOUSLY FURNISHED TO ASTRA
                ----------------------------------------------

        1.  License Agreement dated as of July 15, 1992 by and among Oklahoma
            Medical Research Foundation, The University of Kentucky Research
            Foundation and CENTAUR

        2.  Research Study Agreement dated as of February 1, 1993 by and between
            CENTAUR and [*]

        3.  Research Study Agreement dated as of June 6, 1994 by and between
            CENTAUR and [*]

        4.  Research Study Renewal Agreement dated as of January 1, 1995 by and
            between CENTAUR and [*]

        5.  Research Study Agreement dated as of February 1, 1995 by and between
            CENTAUR and [*]
<PAGE>
 
                                  APPENDIX 3
                                  ----------
                                      TO
                 DEVELOPMENT, LICENSE AND MARKETING AGREEMENT
                              DATED JUNE 26, 1995
                                    BETWEEN
                         CENTAUR PHARMACEUTICALS, INC.
                                      AND
                                   ASTRA AB
                                        


                           OKLAHOMA/KENTUCKY LICENSE
                           -------------------------

                               LICENSE AGREEMENT
                               -----------------

     This License Agreement (the "LICENSE AGREEMENT") is made and entered into
as of this _____ day of June, 1995, by and among the OKLAHOMA MEDICAL RESEARCH
FOUNDATION, an Oklahoma nonprofit corporation ("OMRF"), 825 N.E. 13th Street,
Oklahoma City, OK 73104; THE UNIVERSITY OF KENTUCKY RESEARCH FOUNDATION, a
Kentucky nonprofit corporation ("UKRF"), 120 Graham Avenue, Lexington, KY 40506-
0051 (OMRF and UKRF may be hereinafter collectively referred to as "LICENSORS");
and ASTRA AB, a corporation organized and existing under the laws of Sweden
("ASTRA"), having an office at S-151 85 Sodertalje, Sweden.  OMRF, URKF,
Licensors and Astra may be individually referred to as a "PARTY" and
collectively as the "PARTIES".

                                 RECITALS

     A.  Licensors own rights in and to technology relating to compositions of
and methods for using spin-trapping compounds developed or investigated by Dr.
John M. Carney of UKRF and/or Dr. Robert A. Floyd of OMRF, including the
Licensed Technology.

     B.  Licensors, desiring and intending to have such Licensed Technology used
in the public interest, entered into a License Agreement dated as of July 15,
1992 with Centaur Pharmaceuticals, Inc. ("CENTAUR"), a copy of which, together
with all amendments thereto as of the date hereof, is attached as Exhibit A
                                                                  ---------
(collectively and as subsequently hereafter amended from time to time, the
"CENTAUR LICENSE AGREEMENT"), providing in part for a grant of license to
Centaur with respect to the Licensed Technology, with Centaur's right of
sublicense.

     C.  Astra and Centaur entered into a Development, License and Marketing
Agreement dated as of June 26, 1995 (the "ASTRA-CENTAUR AGREEMENT") wherein
Centaur granted to Astra (the "ASTRA SUBLICENSE"), pursuant to the Centaur
License Agreement, certain 

                                      -1-
<PAGE>
 
sublicense rights in and to the Licensed Technology.

     D.  UKRF and OMRF entered into Research Study Agreement(s) with Centaur
dated as of December 1, 1992 and February 1, 1993, respectively, with respect to
the conduct of an integrated, multi-part research program relating to the
synthesis and evaluation of certain anti-oxidant compounds (collectively and as
subsequently hereafter amended from time to time, the "RESEARCH AGREEMENTS"),
copies of which, together with all amendments thereto as of the date hereof, are
attached collectively as Exhibit B.
                         --------- 

     E.  Pursuant to the Astra-Centaur Agreement, Astra has agreed to provide
Centaur with certain funding (the "ASTRA FUNDING") for research and development
of certain aspects of the Licensed Technology.

     F.  Licensors agree and acknowledge that Astra requires continued and
uninterrupted right of access to and use of the Licensed Technology in order to
exercise Astra's rights pursuant to the Astra Sublicense and Licensor Grant, in
order to research, develop, make, have made, use and sell Licensed Products.

     G.  Licensors desire that the Licensed Technology be used in the public
interest and is willing to grant a license to Astra on the terms and conditions
set forth herein.

     NOW, THEREFORE, for and in consideration of the foregoing and the mutual
covenants and agreements contained herein, the Parties agree as follows:

1.  DEFINITIONS
    -----------

    As used herein:

    1.1  "AFFILIATE" means any person, corporation or business entity that owns
          ---------                                                            
or controls Astra, is under common control with Astra or which is owned or
controlled by Astra through ownership of a majority interest, directly or
indirectly, of the outstanding stock eligible to vote for the Board of Directors
or other similar governing body of the entity.

    1.2  "ASTRA-CENTAUR AGREEMENT" is defined in Recital C of this License
          -----------------------                                         
Agreement.

    1.3  "ASTRA SUBLICENSE" is defined in Recital C of this License Agreement.
          ----------------                                                    

    1.4  "ASTRA'S AUDITORS" means the independent certified or chartered
          ----------------                                              
accountants regularly employed by Astra to audit its accounts and certify its
financial statements.

                                      -2-
<PAGE>
 
     1.5  "EFFECTIVE DATE" is defined in paragraph 3.3 of this License
           --------------                                             
Agreement.

     1.6  "FDA" means the U.S. Food and Drug Administration.
           ---                                              

     1.7  "FIRST COMMERCIAL SALE" shall mean the initial transfer by Astra, its
           ---------------------                                               
Affiliate or Sublicensee, to an unrelated third party of Licensed Products
subject to royalties hereunder for commercial use, and not for research,
development or testing purposes.

     1.8  "LICENSE AGREEMENT" means this License Agreement including all
           -----------------                                            
Exhibits and any amendments thereof.

     1.9  "LICENSED PATENTS" shall mean the United States and foreign patents,
           ----------------                                                   
and patent applications set forth below and any other United States or foreign
patent applications subsequently filed by or on behalf of Licensors (or patents
licensed to the Licensors with right of sublicense) which arise out of, or which
are based on, the Licensed Technology:

          (a)  United States Patent No. 5,025,032, titled "Phenyl Butyl Nitrone
               Compositions and Methods for Treatment of Oxidative Tissue
               Damage," issued June 18, 1991;

          (b)  United States Patent No. 5,036,097, titled "Phenylbutyl Nitrone
               Compositions and Methods for Prevention of Gastric Ulceration,"
               issued July 30, 1991;

          (c)  United States Patent Application No. [*];

          (d)  United States Patent Application No. [*];

          (e)  United States Patent Application No. 08/173,579, titled "2,4
               Disulfonyl PBN, Its Salts, and Their Use as Pharmaceuticals"
               issued _______________;

          (f)  All patent applications and continuations-in-part contemplated by
               OMRF or UKRF as of the date of the Centaur License Agreement
               relating to compositions of and methods for using spin-trapping
               compounds as evidenced by documented communications between Dr.
               Carney and/or Dr. Floyd and Kilpatrick and Cody, patent counsel
               for UKRF and 

                                      -3-
<PAGE>
 
               OMRF;

any and all divisions, continuations, continuations-in-part, reexaminations,
reissues, extensions and foreign counterparts of these applications and patents
and all patents and comparable rights that issue thereon."

    1.10  "LICENSED PROCESS" means any existing or future process which is
           ----------------                                               
covered in whole or in part by an issued, unexpired claim or a pending claim
contained in the Licensed Patents in the country in which the process is
practiced.

    1.11  "LICENSED PRODUCT(S)" means any product or part of a product which:
           -------------------                                               

          (a)  is covered in whole or in part by an issued, unexpired claim or a
               pending claim contained in the Licensed Patents in the country in
               which the product or part of a product is made, used or sold,

          (b)  is manufactured using a Licensed Process, or

          (c)  is used in a Licensed Process and has no substantial use except
               in a Licensed Process.

    1.12  "LICENSED TECHNOLOGY" means collectively the
           -------------------                        

          (a)  Licensed Patents, and

          (b)  Licensed Process, and

          (c)  all ideas, designs, inventions, discoveries, technical
               information, know-how, knowledge, data, specifications, test
               results and other information (including but not limited to
               designs, technical information, know-how, knowledge, data,
               specifications, test results and other information previously
               disclosed to Centaur) relating to the subject matter of the
               Licensed Patents or Licensed Process (i) known to Licensors on
               the date of the Centaur License Agreement, or (ii) arising out of
               collaboration between Licensors and Centaur, whether or not
               pursuant to the Research Agreements.

    1.13  "LICENSED TERRITORY" means the entire world.
           ------------------                         

    1.14  "LICENSOR GRANT" is defined paragraph 2.1 of this License Agreement.
           --------------                                                     

    1.15  "NDA" means a New Drug Application or its equivalent under then
           ---                                                           
applicable 


                                      -4-
<PAGE>
 
FDA regulations for the marketing of a human pharmaceutical Licensed Product.

     1.16  "NET SELLING PRICE" of Licensed Products means the actual cash
            -----------------                                            
receipts of Astra or its Sublicensees and, if applicable, the value of all
properties and services received in consideration of a Sale of Licensed
Products, less only:

          (a)  customary trade, quantity, cash discounts, or rebates actually
               allowed and taken,

          (b)  any freight or other transportation costs, insurance charges,
               import/export duties, tariffs or other excise taxes separately
               invoiced to and paid or reimbursed by the purchaser,

          (c)  returns which are accepted by Astra or its Sublicensees from
               unrelated purchasers in accordance with their normal practice and
               for which Astra or its Sublicensees give credit to such
               purchasers, and

          (d)  sales, excise, turnover and similar use taxes and any duties and
               governmental charges imposed upon the production, importation,
               use or Sale of such Licensed Products which Astra or its
               Sublicensees are under a legal obligation to pay.

provided, however, that where a Sale is deemed consummated by the transfer or
- --------  -------                                                            
other disposition of Licensed Products for other than a selling price stated in
cash, the term "Net Selling Price" shall mean the average Net Selling Price
billed by Astra or its Sublicensee, as the case may be, in consideration of the
Sale of comparable Licensed Products during the three (3) month period
immediately preceding such Sale, without reduction of any kind.

     1.17  "PROPRIETARY INFORMATION" is defined in paragraph 9.1 of this License
            -----------------------                                             
Agreement.

     1.18  "RESEARCH AGREEMENTS" means collectively (i) the "Research Study
            --------------------                                           
Agreement" dated as of December 1, 1992, between UKRF and Centaur, and (ii) the
"Research Study Agreement" dated as of February 1, 1993, between OMRF and
Centaur, as the same are amended to date and may be hereafter amended, extended
or modified from time to time, copies of which, together with all amendments
thereto as of the date hereof, are collectively attached as Exhibit B.
                                                            --------- 
     1.19  "REQUIRED CONSENTS" is defined in paragraph 13.3 of this License
            -----------------                                              
Agreement.

     1.20  "SALE"/"SOLD" means the sale, transfer, exchange or other disposition
            -----------                                                         
of 

                                      -5-
<PAGE>
 
Licensed Products, excluding:
                   --------- 

          (a)  transfers of Licensed Products by Astra to its Sublicensees,

          (b)  transfers of Licensed Products for which Astra or its
               Sublicensees receives no more than nominal payment in connection
               with clinical testing in support of efforts to obtain regulatory
               approvals to sell Licensed Products in the Licensed Territory,
               and

          (c)  all distribution of Licensed Products for promotional purposes
               for which Astra or its Sublicensees receives no more than nominal
               payment.

Sales of Licensed Products shall be deemed consummated upon the later of
recognition of revenue or receipt of payment, by Astra or its Sublicensees, as
the case may be, for such Sales of Licensed Products from the purchaser.

     1.21  "SUBLICENSE INITIATION FEE" means any Sublicense Fee or non-
            -------------------------                                 
refundable advance against royalties paid or to be paid by a Sublicensee, but
does not include any payment for research or other services or reimbursement of
Astra's expenses.

     1.22  "SUBLICENSEES" is defined in paragraph 2.3 of this License Agreement.
            ------------                                                        

2.   GRANT OF LICENSE
     ----------------

     2.1  LICENSE.  Subject to the license retained by Licensors in paragraph
          -------                                                            
2.2 and the other terms of this License Agreement, and effective as of the date
hereof, Licensors hereby grant to Astra (the "LICENSOR GRANT") an exclusive
right and license (co-exclusive with Centaur), with Astra's right to sublicense,
of such rights and licenses under and pursuant to the Licensed Technology, but
only to the extent set forth in the Astra Sublicense granted by Centaur, to use
the Licensed Technology to research, develop, make, have made, use, lease and
sell and have sold Licensed Products and to practice the Licensed Processes in
the Licensed Territory during the term of this License Agreement unless sooner
terminated as provided in this License Agreement.

     2.2  RETAINED LICENSE.  Licensors retain the perpetual, royalty-free right
          ----------------                                                     
and license to practice the Licensed Technology solely for research and
educational purposes.

     2.3  SUBLICENSES.  Astra shall have the right to sublicense the rights
          -----------                                                      
granted hereunder to third parties and Affiliates of Astra (collectively the
"SUBLICENSEES") provided that Astra promptly notifies Licensors of each such
Sublicense.  Any such Sublicense will survive termination of this License
Agreement only if Licensors approve the identity of the 

                                      -6-
<PAGE>
 
Sublicensee in writing, either before or after Astra's grant of the Sublicense.
Astra may request Licensors' approval of a Sublicensee at any time, and
Licensors will not unreasonably withhold or delay such approval.

     2.4  SUBLICENSEE OBLIGATIONS.  All Sublicenses granted by Astra shall
          -----------------------                                         
provide that the obligations of Astra to Licensors under Sections 5, 9, 11 and
12 of this License Agreement shall be binding upon Sublicensee as if it were a
party to this License Agreement.

     2.5  SUBLICENSE COPIES AND REPORTS.  Astra shall provide to Licensors (i) a
          -----------------------------                                         
copy of all Sublicense agreements promptly after execution, and (ii) annually,
following the Effective Date, copies of all reports relating to Sales of
Licensed Product received by Astra from its Sublicensees during the preceding
twelve (12) month period.

     2.6  NONCASH CONSIDERATION.  If Astra receives from Sublicensees anything
          ---------------------                                               
of value in lieu of cash payments in satisfaction of payment of obligations
under the Sublicense and this License Agreement, then Astra shall determine the
cash value of such consideration in good faith and shall pay Licensors based on
such cash value as set forth in Section 4.

     2.7  NO IMPLIED LICENSE.  The license and rights granted in this License
          ------------------                                                 
Agreement shall not be construed to confer any rights upon Astra by implication,
estoppel or otherwise as to any technology not specifically identified in this
License Agreement as "Licensed Technology", nor shall it be construed to confer
any rights outside the Licensed Territory.

     2.8  FIRST RIGHT OF NEGOTIATION.  [*]
          --------------------------                                      

3.   DUE DILIGENCE - EFFECTIVE DATE
     ------------------------------

     3.1  DILIGENCE.  Astra shall use its reasonable efforts throughout the term
          ---------                                                             
of this License Agreement to bring one or more Licensed Products to market
through a program for 

                                      -7-
<PAGE>
 
exploiting the Astra Sublicense and Licensor Grant and for creating, supplying
and servicing a market for Licensed Products in the Licensed Territory.

     3.2  DELIVERY.  Promptly after the date hereof and thereafter from time to
          --------                                                             
time upon reasonable notice, Licensors shall deliver to Astra (to the extent not
provided to Astra by Centaur pursuant to the Astra Sublicense) all data,
documentation, and other physical embodiments of the Licensed Technology
together with all cooperation, assistance and access to data reasonably
requested by Astra to effect transfer of the Licensed Technology and permit
Astra to fully utilize the Astra Sublicense and Licensor Grant.

     3.3  EFFECTIVE DATE.  Notwithstanding the current effectiveness of the
          --------------                                                   
Licensor Grant, Astra, and its Sublicensees, covenant and agree not to use the
Licensor Grant, or any right granted herein, until on and after the date (the
"EFFECTIVE DATE") which is the earlier to occur of:

          (a)  notification by Licensors (the "LICENSORS NOTIFICATION") that the
               Centaur License Agreement has been terminated, or

          (b)  notification by Astra (the "ASTRA NOTIFICATION") that the Astra-
               Centaur Agreement has been terminated by Astra as a result of a
               "Default" or "Bankruptcy" of Centaur (as such terms are defined
               in the Astra-Centaur Agreement).

Upon the Effective Date, Astra and its Sublicensees may use and exercise the
Licensor Grant in full, without further agreement or documentation being entered
into by Astra or Licensors.  Licensors covenant and agree that the effect,
accuracy or underlying basis of the Astra Notification shall be uncontestable by
Licensors.  Upon termination of the Centaur License Agreement, the Licensor
Grant to Astra shall be deemed exclusive.

     3.4  TERMINATION OF ASTRA FUNDING.  Any termination, cessation or
          ----------------------------                                
interruption of the Astra Funding shall have no affect upon Licensor Grant or
Astra's rights herein.

4.  ROYALTY
    -------

     4.1  PAYMENT OF ROYALTY.  Commencing with the First Commercial Sale
          ------------------                                            
following the Effective Date and continuing during the term of this License
Agreement as set forth in paragraph 10.1 hereof, Astra agrees to pay to
Licensors, in full consideration for the Licensor Grant:

          (a)  A royalty equal to [*] of the Net Selling Price of
               Licensed Products Sold by or for Astra and its Sublicensees;

                                      -8-
<PAGE>
 
          (b)  With respect to each Sublicense granted by Astra under this
               License Agreement, [*] of all Sublicensee
               Initiation Fees paid to Astra pursuant to such Sublicense;

          (c)  in the event that Astra's total annual royalty and Sublicense
               payments to Licensors pursuant to the preceding paragraph 4.1(a)
               and (b) during the calendar year following the Effective Date and
               each calendar year thereafter is less than the annual minimum set
               forth opposite such year below (the "ANNUAL MINIMUM"), a payment
               to Licensors together with the annual report required in
               paragraph 6.3 of this License Agreement (or, if no such annual
               report is required, together with the quarterly report required
               in paragraph 6.1 of this License Agreement for the three (3)
               month period ending on December 31 of such calendar year) equal
               to the difference between such Annual Minimum and the total
               royalty and Sublicense payments paid to Licensors for the
               preceding calendar year pursuant to paragraphs 4.1(a) and (b)
               above:

               Calendar Year                    Annual Minimum
               -------------                    --------------

               .  First year                    [*]
               .  Second and each subsequent
                  year through the year
                    the FDA first approves
                    an NDA                              [*]
               .  Each year after the year the
                    FDA first approves an NDA   [*]


     4.2  NON-CUMULATIVE ROYALTIES.  Royalties shall be payable by Astra with
          ------------------------                                           
respect to all of its or its Sublicensees' Sales except for Astra's resale of
any products purchased from Licensors.  Royalties shall not become payable at
the time of Sublicense or transfer from Astra to its Sublicensees, but shall
become payable only when Astra receives payment of royalties (after recovery of
any prepaid royalties included in any Sublicense Initiation Fee) from its
Sublicensee with respect to such Sublicensee's Sales.

     4.3  NO MULTIPLE ROYALTIES.  No multiple royalties shall be payable because
          ---------------------                                                 
any Licensed Product is covered by more than one patent within the Licensed
Patents.

     4.4  DEDUCTION OF TAXES.  Any income or other tax which Astra is required
          ------------------                                                  
to withhold and pay on behalf of Licensors with respect to the royalties payable
to Licensors under this License Agreement shall be deducted from such royalties
prior to remittance to 

                                      -9-
<PAGE>
 
Licensors; provided, however, that in regard to any tax so deducted, Astra shall
           --------  -------                           
give Licensors such assistance as may reasonably be necessary to enable
Licensors to claim exemption therefrom. In each case, Astra shall furnish
Licensors with proper evidence of the taxes so paid on its behalf.

     4.5  INTEREST.  Royalty and other payments required in this License
          --------                                                      
Agreement shall, if overdue, bear interest until payment at a per annum rate of
two percent (2%) above the prime rate in effect at the Chase Manhattan Bank,
N.A., New York, New York, U.S.A., on the due date, but not more than the highest
rate permitted by law.  The payment of such interest shall not foreclose
Licensors from exercising any other rights they may have because any payment is
late.

     4.6  CURRENCY CONVERSION AND DELIVERY.  All payments required in this
          --------------------------------                                
License Agreement shall be paid in United States dollars, delivered in
accordance with paragraph 6.2 and 13.9 of this License Agreement or to such
other place as Licensors may reasonably designate consistent with the applicable
laws and regulations in any foreign country.  If any currency conversion shall
be required in connection with the payment of royalties hereunder, such
conversion shall be at the rate in effect at the Chase Manhattan Bank, New York,
New York, U.S.A., on the last business day of the calendar quarterly reporting
period to which such payment(s) relate.

5.  RECORDS
    -------

     5.1  RECORDS OF SALES.  Commencing on and after the Effective Date, Astra
          ----------------                                                    
shall at all times during the term of this License Agreement and for a period of
three (3) years after termination of this License Agreement keep at its
principal place of business true and accurate records of all Sales subject to
Section 4 of this License Agreement in such form and manner that all royalties
owed hereunder to Licensors may be readily and accurately determined.  Such
records shall be kept for a period of at least three (3) years after the end of
the royalty period to which they pertain and shall include, but not by way of
limitation, all information necessary for Astra's Auditors to prepare the
reports required by Section 6 of this License Agreement.

     5.2  INSPECTION.  Commencing on and after the Effective Date, Licensors
          ----------                                                        
shall have the right, from time to time, at reasonable times during normal
business hours no later than three (3) years after expiration or termination of
this License Agreement and at Licensors' expense, to examine the records of
Astra, at Astra's place of business, through an independent certified public
accountant for the purpose of verifying the amounts owed to Licensors hereunder
and the accuracy of the reports furnished by Astra under Section 6 of this
License Agreement.  Licensors and their accountant shall maintain the
confidentiality of all confidential information obtained from examination of
Astra's records and shall use such information only for the purposes of this
License Agreement.

                                     -10-
<PAGE>
 
6.  REPORTS
    -------

     6.1  QUARTERLY REPORTS.  Astra shall, on and after the Effective Date,
          -----------------                                                
prepare and deliver to Licensors within sixty (60) days after March 31, June 30,
September 30 and December 31 of each year during the term of this License
Agreement, a true and accurate report, giving such particulars of the business
conducted by Astra and its Sublicensees during the preceding three (3) month
period as is required to calculate the royalties due Licensors hereunder.  Such
report shall include at least the following:

          (a)  the total Net Selling Price of all Licensed Products Sold by
               Astra and its Sublicensees during the preceding three (3) month
               period and for the calendar year to date,

          (b)  all Sublicense Initiation Fees received from Sublicensees during
               the preceding three (3) month period and for the calendar year to
               date, and

          (c)  the names and address of all new Sublicensees of Astra since the
               previous report.

     6.2  PAYMENTS.  With each such report delivered, Astra shall pay to
          --------                                                      
Licensors (by delivery to OMRF) all amounts due under this License Agreement.
If no payments are due, Astra shall so report.

     6.3  AUDIT REPORT.  Commencing on and after the Effective Date, and within
          ------------                                                         
one hundred fifty (150) days after the end of each whole or partial fiscal year
of Astra in which Licensed Products are Sold during the term of this License
Agreement, Astra shall have its books and records audited by Astra's Auditors
and shall direct them to prepare and submit to Licensors, certified financial
statements for the preceding fiscal year including, at a minimum, a balance
sheet together with an operating statement together with an audit report
thereon.  Appropriate disclosure will be made in the footnotes to Astra's
audited financial statements of (i) the total Sales of Licensed Products by
Astra and its Sublicensees during the past year, and (ii) the amounts owed to
Licensors in total at the year end balance sheet date.  If such disclosure is
not made in the footnotes to Astra's audited financial statements, then Astra's
Auditors shall prepare a special report covering items (i) and (ii) above and
submit it to Licensors.

7.  PATENT PROSECUTION
    ------------------

     7.1  LICENSED PATENTS.  Licensors shall apply for, seek prompt issuance of,
          ----------------                                                      
and maintain during the term of this License Agreement the patents, patent
applications and foreign 

                                     -11-
<PAGE>
 
counterparts, as the case may be, included within the Licensed Patents that are
(i) specifically identified by patent number or application serial number in
paragraph 1.9 of this License Agreement, or (ii) timely identified or specified
by Astra by notice to Licensors. Except as provided in paragraph 7.4, the
prosecution and maintenance of all patent applications, foreign counterparts and
patents within the Licensed Patents shall be the primary responsibility of
Licensors; provided, however, that Astra shall be afforded reasonable
           --------  -------                  
opportunities to advise Licensors and shall cooperate with Licensors in such
prosecution and maintenance.

     7.2  LICENSORS' REIMBURSEMENT.  Except as provided in paragraph 7.4, Astra
          ------------------------                                             
shall on and after the Effective Date reimburse Licensors for all reasonable
out-of-pocket fees, costs and expenses reasonably paid or incurred by Licensors
in filing, prosecuting and maintaining the Licensed Patents on a pro-rata basis
with other Foundation licensees under the Licensed Technology, taking into
consideration the relative value obtained by each such licensee from such patent
or patent application as determined by Licensors in good faith consultation with
such licensees.  Astra shall, on and after the Effective Date, deliver such
reimbursement to Licensors (or, if Licensors request, directly to Licensors'
patent counsel) within thirty (30) days after Licensors (or Licensors' patent
counsel) notify Astra from time to time of the amount of such fees, costs and
expenses which have been paid or incurred by Licensors.

     7.3  PATENT ABANDONMENT.  Licensors shall, on and after the date hereof,
          ------------------                                                 
promptly advise Astra of the grant, lapse, revocation, surrender, any threatened
invalidation of, or of their intention to abandon any such patent, application
or foreign counterpart.  If Licensors advise Astra of their intention not to
pursue a patent on any Licensed Technology or to abandon any such patent,
application or foreign counterpart, Astra shall have the right, at its own
expense, to pursue such patent, application or foreign counterpart, in Astra's
name or in Licensors' name, as Astra may determine, and all rights resulting
therefrom shall vest in Astra alone.

     7.4  FOREIGN APPLICATION.  Astra shall on and after the Effective Date
          -------------------                                              
designate each country, if any, in which Astra desires that patent
application(s) corresponding to the Licensed Patents be filed.  Astra shall, on
and after the Effective Date, pay all costs and legal fees associated with the
preparation and filing of such designated foreign patent applications, and such
applications shall be in Licensors' name.  Licensors may elect to file
corresponding patent applications in countries other than those designated by
Astra, but in that event Licensors shall be responsible for all costs associated
with such non-designated filings.  Licensors will notify Astra that it intends
to make such filings.  Astra will, on and after the Effective Date, have thirty
(30) days to decide to pay for such filings and prosecutions.  If it does not
decide to pay for such applications within the 30-day period, on and after the
Effective Date, neither of such applications nor any patents that issue thereon
shall be considered to be Licensed Patents, and Astra shall forfeit its rights
under this License Agreement with respect to such applications and patents.

                                     -12-
<PAGE>
 
8.  PATENT INFRINGEMENT
    -------------------

     8.1  NOTICE OF INFRINGEMENT.  Astra shall promptly notify Licensors of any
          ----------------------                                               
alleged infringement of the Licensed Patents and of any available evidence of
such infringement.

     8.2  SUIT BY ASTRA.  Astra shall have the right, but not the obligation, to
          -------------                                                         
commence suit for any infringement of the Licensed Patents, and Licensors agree
that Astra may cause Licensors to join Astra as a party to any such suit at no
expense to Licensors.  The total cost of any such infringement action commenced
or defended solely by Astra shall be borne by Astra, and Astra shall retain any
recovery or damages awarded in such action, but such recovery or damages (less
the cost of such recovery, including reasonable attorneys' and experts' fees)
shall be treated as Sales of Licensed Products, and Astra shall pay royalties
thereon to Licensors in accordance with paragraph 4.1(a) of this License
Agreement.  No settlement, consent judgment or other voluntary final disposition
of the suit may be entered into without the written consent of Licensors, which
consent shall not be unreasonably withheld.  Astra shall indemnify Licensors
against any order for costs or award of sanctions that may be made or entered
against Licensors in such proceedings commenced or defended solely by Astra.

     8.3  SUIT BY LICENSORS.  If within six (6) months after notice by Astra to
          -----------------                                                    
Licensors, or by one of Licensors to Astra, of any alleged infringement, Astra
has been unsuccessful in persuading the alleged infringer to desist and has not
brought an infringement action, or if Astra notifies Licensors at any time of
Astra's intention not to bring suit against an alleged infringer, then and only
then, Licensors shall have the right, but not the obligation, to commence suit
for such infringement at Licensors' sole expense, and Licensors may, in such
suit, use the name of Astra as a nominal party.  No settlement, consent judgment
or other voluntary final disposition of the suit may be entered into without the
written consent of Astra, which consent shall not be unreasonably withheld.
Astra shall not be responsible for any order for costs or awards of sanctions
that may be made or entered against Astra in such proceedings.

     8.4  DEFENSE.  In the event that a declaratory judgment action alleging
          -------                                                           
invalidity, unenforceability or noninfringement of any of the Licensed Patents
shall be brought against Astra, Licensors or either of them, Astra shall have
the first right to defend such action; provided, however, that if Astra
                                       -----------------               
determines at any time that it does not desire to defend such action, it shall
promptly so advise Licensors, and Licensors shall then have the right to defend
such action at Licensors' sole expense.  Astra shall not be responsible for any
order for costs or award of sanctions that may be made or entered against Astra
in such proceedings.

     8.5  COOPERATION.  In any suit either Party may commence or defend pursuant
          -----------                                                           
to its rights under this License Agreement in order to enforce or defend the
validity or enforceability 


                                     -13-
<PAGE>
 
of the Licensed Patents, the other Party shall, at the reasonable request and
expense of the Party initiating or defending such suit, reasonably cooperate in
all respects and, to the extent possible, have its employees testify when
requested and make available relevant records, papers, information, samples,
specimens and the like.

9.  CONFIDENTIALITY
    ---------------

     9.1  MAINTENANCE OF CONFIDENTIALITY.  No Party shall, without the express
          ------------------------------                                      
written consent of the other Parties to this License Agreement in advance, for
any reason or at any time either during or for a period of three (3) years
subsequent to the term of this License Agreement, except as otherwise provided
in this paragraph 9.1, (i) use (except in the course of practicing the licenses
granted in this License Agreement), or (ii) disclose (except as is necessary in
the course of sublicensing, marketing or selling Licensed Products or obtaining
governmental approval to do so, or as is required to be disclosed pursuant to
law (provided that the receiving Party uses reasonable efforts to give the
disclosing Party reasonable notice of such required disclosure) as contemplated
in this License Agreement) to any person (including without limitation any
director, officer or employee of a Party who is not under an obligation of
confidentiality substantially similar to the obligation contained herein) the
Licensed Technology or any other information relating to the Licensed Products
(collectively the "PROPRIETARY INFORMATION").  This obligation of non-use and
non-disclosure shall not extend to Proprietary Information:

          (a)  which can be demonstrated by the receiving Party to have been
               within its legitimate possession prior to the time of disclosure
               by the disclosing Party,

          (b)  which was in the public domain prior to disclosure by the
               disclosing Party, as evidenced by documents which were generally
               published prior to such disclosure,

          (c)  which, after disclosure by the disclosing Party, comes into the
               public domain through no fault of the receiving Party, or

          (d)  which is disclosed to the receiving Party by a third party having
               legitimate possession thereof and the unrestricted right to make
               such disclosure.

     9.2  PRIOR AGREEMENTS.  The provisions of this License Agreement supersede
          ----------------                                                     
and shall be substituted for any terms of any prior confidentiality agreement(s)
relating to the Proprietary Information between Astra and either of the
Licensors which are not consistent with this License Agreement.


                                     -14-
<PAGE>
 
10.  TERM AND TERMINATION
     --------------------

     10.1  DURATION.  Unless sooner terminated as otherwise provided in this
           --------                                                         
License Agreement, the term of this License Agreement shall commence upon the
date hereof and shall continue until the later of (i) fifteen (15) years from
the date hereof, or (ii) the date of expiration of the last to expire of the
Licensed Patents, except that upon expiration of this License Agreement at the
                  -----------                                                 
end of such term, Astra shall automatically have a perpetual, paid-up, royalty-
free license to use and sublicense Licensed Technology without restriction.

     10.2  TERMINATION.  Licensors shall have the right to terminate this
           -----------                                                   
License Agreement on the occurrence of any one or more of the following events
and notice to Astra pursuant to paragraph 10.3:

          (a)  failure of Astra to make any payment when due required pursuant
               to this License Agreement;

          (b)  failure of Astra to render reports to Licensors as required by
               this License Agreement;

          (c)  the insolvency of Astra;

          (d)  the institution of any proceeding by Astra under any bankruptcy,
               insolvency or moratorium law;

          (e)  any assignment by Astra of substantially all of its assets for
               the benefit of creditors;

          (f)  placement of Astra's assets in the hands of a trustee or a
               receiver unless the receivership or trust is dissolved within
               thirty (30) days thereafter; or

          (g)  the material or intentional breach by Astra of any other term of
               this License Agreement.

     10.3  EXERCISE.  Licensors may exercise their right of termination as
           --------                                                       
provided in paragraph 10.2, by giving Astra, its trustees, receivers or assigns,
sixty (60) days prior written notice of Licensors' election to terminate this
License Agreement.  Upon the expiration of such period, this License Agreement
shall automatically terminate unless (i) Astra has previously cured the breach
or condition permitting termination under the preceding paragraph 10.2, or (ii)
such breach or condition cannot reasonably be cured within sixty (60) days due
to causes beyond Astra's reasonable control, Astra commences good faith efforts
to cure such breach 

                                     -15-
<PAGE>
 
within such 60-day period and Astra does cure the breach within one hundred
twenty (120) days after the expiration of such 60-day period, in which case this
License Agreement shall not terminate. Such notice and termination shall not
prejudice Licensors' rights to any royalties and other sums due hereunder and
shall not prejudice any cause of action or claim of Licensors accrued or to
accrue on account of any breach or default by Astra.

     10.4  FAILURE TO ENFORCE.  The failure of Licensors at any time, or for any
           ------------------                                                   
period of time, to enforce any of the provisions of this License Agreement shall
not be construed as a waiver of such provisions or the right of Licensors
thereafter to enforce each and every such provision.

     10.5  TERMINATION BY ASTRA.  Astra may terminate this License Agreement at
           --------------------                                                
any time giving Licensors six (6) months prior written notice of Astra's
election to terminate.

     10.6  EFFECT.  In the event this License Agreement is terminated prior to
           ------                                                             
its expiration for any reason whatsoever, Astra (i) shall not have any right to
return of any payments of any kind theretofore made by Astra to Licensors
pursuant to this License Agreement, (ii) shall return, or at Licensor's
direction, destroy, all plans, drawings, papers, notes, writings and other
documents, samples, organisms, biological materials and models constituting the
Licensed Technology, retaining no copies, (iii) shall refrain from using or
publishing any portion of the Licensed Technology as provided in Section 9 of
this License Agreement, and (iv) shall cease manufacturing, processing,
producing, using, selling or distributing Licensed Products; provided, however
                                                             -----------------
that Astra may continue to sell in the ordinary course of business for a period
of one hundred eighty (180) days reasonable quantities of Licensed Products
which are fully manufactured and in Astra's normal inventory at the date of
termination if:

          (a)  all monetary obligations of Astra to Licensors have been
               satisfied, and

          (b)  royalties on such sales are paid to Licensors in the amounts and
               in the manner provided in this License Agreement.

Upon termination of this License Agreement, any Sublicenses granted by Astra to
Sublicensees that have been approved by Licensor as contemplated by Section 2.3
and in which the Sublicensees are in full compliance, including without
limitation compliance with the obligations under Section 5, 9, 11 and 12 of this
License Agreement, shall continue in full force and effect with Licensors
substituted in Astra's place.  The provisions of Sections 9, 11 and 12 of this
License Agreement shall remain in full force and effect notwithstanding any
termination of this License Agreement.

11.  INDEMNIFICATION AND INSURANCE
     -----------------------------

                                     -16-
<PAGE>
 
     11.1  INDEMNIFICATION.  Other than as specifically provided elsewhere in
           ---------------                                                   
this License Agreement, Astra shall defend, indemnify, and hold harmless
Licensors, The University of Kentucky, the University of Oklahoma and their
officers, directors, trustees and employees and all of their heirs, executors,
administrators and legal representatives ("INDEMNITEES") from and against any
and all claims, demands, loss, liability, expense or damage (including
investigative costs, court costs and attorneys' fees) Indemnitees may suffer,
pay or incur as a result of claims, demands or actions against any of the
Indemnitees arising or alleged to arise by reason of or in connection with any
and all personal injury, economic loss and property damage caused or alleged to
be caused or contributed to in whole or in part by the manufacture, use, lease,
sale or sublicense of Licensed Products by Astra, whether asserted under a tort
or contractual theory or any other legal theory, including but not limited to
any and all claims, demands, and actions in which it is alleged that (i) an
Indemnitee's negligence or representations about the Licensed Products caused
any defect in their manufacture, design, labeling or performance, or (ii) any
alleged infringement of any patent, trademark or copyright, caused or
contributed in whole or in part to the personal injury, economic loss or
property damage.  Astra's obligations under this paragraph 11.1 shall survive
the expiration or termination of this License Agreement for any reason.  The
foregoing indemnification shall not apply in the event a court of competent
jurisdiction determines that such liability, demands, damages, expenses and
losses, arose in whole or in part as a result of Licensors' intentional
misconduct or gross negligence.

     11.2  INSURANCE.  Without limiting Astra's indemnity obligations under the
           ---------                                                           
preceding paragraph 11.1, prior to testing any compounds in humans, Astra shall
obtain a liability insurance policy which:

          (a)  insures Indemnitees for all claims, demands and actions mentioned
               in the preceding paragraph 11.1 of this License Agreement;

          (b)  includes a contractual endorsement providing coverage for all
               such liability which may be incurred by Indemnitees in connection
               with this License Agreement;

          (c)  requires the insurance carrier to provide Licensors with no less
               than thirty (30) days written notice of any change in the terms
               of coverage of the policy or its cancellation; and

          (d)  provides Indemnitees with product liability coverage in the
               following amounts for the periods indicated below:


               (i)  [*] in product liability coverage during the period in which
                    one (1) or more Licensed Products are being used in United

                                     -17-
<PAGE>
 
                    States FDS clinical trials in human beings but no Licensed
                    Products are approved by FDA for use in human beings;

               (ii) [*] in product liability coverage for each Licensed Product
                    approved by FDA for use in human beings;

provided that the aggregate maximum amount of product liability coverage for all
- -------------                                                                   
Licensed Products at any time shall not exceed [*] combined single limit for
bodily injury and property damage liability, subject to a deductible of not more
than [*] per occurrence, and provided further that Astra, at its option, may
provide Licensors with a certificate of Astra's insurer substantially in the
form of Exhibit C attached hereto, in lieu of naming
        ---------
Licensors as insureds.

Astra shall maintain such liability insurance policy throughout the term of this
License Agreement and for three (3) years thereafter.

     11.3  NOTICE OF CLAIMS.  Astra will promptly notify Licensors of all claims
           ----------------                                                     
involving Licensed Products.

     11.4  EVIDENCE OF INSURANCE.  Astra shall provide Licensors with copies of
           ---------------------                                               
liability policies which comply fully with this License Agreement during the
entire period Astra is required to maintain such insurance.  If Astra fails at
any time to maintain insurance as required in this License Agreement, Licensors
may (but shall be under no obligation to) purchase their own policy providing
all or any of the coverage and recover from Astra the cost thereof, which shall
be payable on demand.

     11.5  INDEMNIFICATION BY ASTRA.  Astra shall indemnify and hold harmless
           ------------------------                                          
Indemnitees against and with respect to all losses, damages, claims, liabilities
or expenses (including reasonable attorneys' fees and expenses) incurred or
sustained by any of them as a result of, or arising out of, any violation,
breach or nonfulfillment on the part of Astra of any representation, warranty,
covenant or agreement made by Astra pursuant to this License Agreement.
Licensors or Indemnities shall notify Astra in writing promptly after it or they
acquire actual knowledge of any action or claim against it or them hereunder
which may give rise to liability of Astra pursuant to this paragraph 11.5.
Astra may, at its own expense, through legal counsel reasonably approved by
Licensors, defend or settle any such claim or action, provided that Astra posts
security that is adequate in the reasonable discretion of Licensors to protect
Licensors or Indemnities and provided Licensors are notified in writing of
Astra's intent to so defend within ten (10) days after Astra has been notified
by Licensors or such other Indemnities of such claim or action.

     11.6  CONTRIBUTION BY ASTRA.  If the indemnification provided for in the
           ---------------------                                             
preceding 

                                     -18-
<PAGE>
 
paragraph 11.5 is unavailable or insufficient to hold harmless Indemnities in
respect of any of the losses, claims, damages or liabilities (or actions in
respect thereof) referred to above, then Astra shall contribute to the amount
paid or payable by each such Indemnities as a result of such losses, claims,
damages or liabilities (or actions in respect thereof) in such proportion as is
appropriate to reflect the relative benefits received by Astra on the one hand
and Licensors and any other Indemnities on the other from the activities from
which such losses, claims, damages or liabilities arose, as well as the relative
fault of Astra on the one hand and Licensors on the other in connection with the
actions or inactions which resulted in such losses, claims, damages or
liabilities (or actions in respect thereof), as well as any other relevant
equitable considerations.

12.  MERCHANTABILITY, EXCLUSION OF WARRANTIES, LIMITATION OF DAMAGES AND
     -------------------------------------------------------------------
     WARRANTIES.
     ---------- 

     12.1  NO WARRANTY.  Astra has made its own evaluation of the potential
           -----------                                                     
capabilities, safety, utility and commercial application of the Licensed
Technology, Licensed Products and Licensed Processes.

          ACCORDINGLY, LICENSORS MAKE NO REPRESENTATION OR WARRANTY OF ANY KIND
          WITH RESPECT TO THE LICENSED TECHNOLOGY, LICENSED PRODUCTS OR LICENSED
          PROCESSES AND EXPRESSLY DISCLAIM ANY WARRANTIES OF MERCHANTABILITY OR
          FITNESS FOR A PARTICULAR PURPOSE AND ANY OTHER IMPLIED WARRANTIES WITH
          RESPECT TO THE CAPABILITIES, SAFETY, UTILITY OR COMMERCIAL APPLICATION
          OF LICENSED TECHNOLOGY, LICENSED PRODUCTS AND LICENSED PROCESSES.

     12.2  LIMITATION OF LIABILITY.  LICENSORS SHALL NOT BE LIABLE FOR ANY
           -----------------------                                        
DIRECT, CONSEQUENTIAL OR OTHER DAMAGES SUFFERED BY ASTRA OR ANY OTHER RESULTING
FROM THE USE OF THE LICENSED TECHNOLOGY, LICENSED PRODUCTS OR LICENSED
PROCESSES.

     12.3  REPRESENTATIONS AND WARRANTIES OF ASTRA.  Astra hereby makes the
           ---------------------------------------                         
following representations and warranties to Licensors, which representations and
warranties, together with all other representations and warranties of Astra in
this License Agreement, are true and correct on the date hereof:

          (a)  Astra is a corporation duly organized, validly existing and in
               good standing under the laws of Sweden and has all requisite
               corporate power and authority to enter into this License
               Agreement and perform its obligations hereunder.

                                     -19-
<PAGE>
 
          (b)  Neither the execution or delivery of this License Agreement, nor
               the consummation of the transactions contemplated herein, will
               (i) violate or conflict with any provision of the incorporation
               documents or By-laws of Astra, as each may have been amended,
               (ii) with or without the giving of notice of the lapse of time or
               both (x) result in a breach of, or violate, or be in conflict
               with or constitute a default under, or result in the termination
               or cancellation of, or accelerate the performance required under,
               any security instrument, mortgage, note, debenture, indenture,
               loan, lease, contract, agreement or other instrument, to which
               Astra is a party or by which Astra or any of Astra's properties
               or assets may be bound or affected, or (y) result in the loss or
               adverse modification of any lease, franchise, license or other
               contractual right or other authorization granted to or otherwise
               held by Astra, (iii) require the consent of any party to any such
               agreement or commitment to which Astra is a party or by which any
               of Astra's properties or assets are bound, (iv) result in the
               creation or imposition of any lien, claim or encumbrance upon any
               property or assets of Astra, or (v) require any consent,
               approval, authorization, order, filing, registration or
               qualification of or with any court or governmental authority or
               arbitrator to which Astra is subject or by which any of its
               properties or assets may be bound or affected.

          (c)  All actions to authorize the execution and delivery of this
               License Agreement and the consummation of the transactions
               contemplated herein have been duly taken, and this License
               Agreement constitutes the valid and binding obligation of Astra
               enforceable in accordance with its terms.

          (d)  There are no claims (relating to patent infringement or any other
               matters), actions, suits, proceedings, arbitrations or
               investigations pending or, to the best of Astra's knowledge,
               threatened, against Astra which is adversely determined would
               adversely affect the Licensed Technology (or the patentability
               thereof) or other technology practiced by Astra, or Astra's
               ability to enter into or carry out this License Agreement or use
               or license Licensed Technology.

     12.4  REPRESENTATIONS AND WARRANTIES OF OMRF.  OMRF hereby makes the
           --------------------------------------                        
following representations and warranties to Astra, which representations and
warranties, together with all other representations and warranties of OMRF in
this License Agreement, are true and correct on the date hereof:

                                     -20-
<PAGE>
 
          (a)  OMRF is a nonprofit corporation duly organized, validly existing
               and in good standing under the laws of the State of Oklahoma and
               has all requisite corporate power and authority to enter into
               this License Agreement and perform its obligations hereunder.

          (b)  Neither the execution or delivery of this License Agreement, nor
               the consummation of the transactions contemplated herein, will
               (i) violate or conflict with any provision of the Articles of
               Incorporation or By-laws of OMRF, as each may have been amended,
               (ii) require the consent of any party to any agreement or
               commitment to which OMRF is a party or which affects the Licensed
               Technology, (iii) result in the creation or imposition of any
               lien, claim or encumbrance upon the Licensed Technology; or (iv)
               require any consent, approval, authorization, order, filing,
               registration or qualification of or with any court or
               governmental authority or arbitrator to which OMRF is subject or
               by which the Licensed Technology may be affected.

          (c)  All actions to authorize the execution and delivery of this
               License Agreement and the consummation of the transactions
               contemplated herein have been duly taken, and this License
               Agreement constitutes the valid and binding obligation of OMRF
               enforceable in accordance with its terms.

          (d)  There are no claims (relating to patent infringement or any other
               matters relating to the Licensed Technology), actions, suits,
               proceedings, arbitrations or investigations pending or, to the
               best of OMRF's knowledge, threatened, against OMRF which if
               adversely determined would adversely affect the Licensed
               Technology (or the patentability thereof) or OMRF's ability to
               enter into or carry out this License Agreement.

          (e)  OMRF represents and warrants to the best of its knowledge and
               belief that OMRF (together with UKRF) is the sole owner of the
               Licensed Technology and such is free of any lien, encumbrance,
               restriction, and other legal or equitable claim, apart from the
               possible non-exclusive rights held by the United States
               Government as a result of research sponsorship.

          (f)  OMRF further represents and warrants that OMRF has not granted
               (and will not grant during the term of this License Agreement)
               such rights or licenses to the Licensed Technology as set forth
               in the Licensor Grant 

                                     -21-
<PAGE>
 
               (other than to Centaur pursuant to Centaur License Agreement).

     12.5  REPRESENTATIONS AND WARRANTIES OF UKRF.  UKRF hereby makes the
           --------------------------------------                        
following representations and warranties to Astra, which representations and
warranties, together with all other representations and warranties of UKRF in
this License Agreement, are true and correct on the date hereof:

          (a)  UKRF is a nonprofit corporation duly organized, validly existing
               and in good standing under the laws of the State of Kentucky and
               has all requisite corporate power and authority to enter into
               this License Agreement and perform its obligations hereunder.

          (b)  Neither the execution or delivery of this License Agreement, nor
               the consummation of the transactions contemplated herein, will
               (i) violate or conflict with any provision of the Articles of
               Incorporation or By-laws of UKRF, as each may have been amended,
               (ii) require the consent of any party to any agreement or
               commitment to which UKRF is a party or which affects the Licensed
               Technology, (iii) result in the creation or imposition of any
               lien, claim or encumbrance upon the Licensed Technology, or (iv)
               require any consent, approval, authorization, order, filing,
               registration or qualification of or with any court or
               governmental authority or arbitrator to which UKRF is subject or
               by which the Licensed Technology may be affected.

          (c)  All actions to authorize the execution and delivery of this
               License Agreement and the consummation of the transactions
               contemplated herein have been duly taken, and this License
               Agreement constitutes the valid and binding obligation of UKRF
               enforceable in accordance with its terms.

          (d)  There are no claims (relating to patent infringement or any other
               matters relating to the Licensed Technology), actions, suits,
               proceedings, arbitrations or investigations pending or, to the
               best of UKRF's knowledge, threatened, against OMRF which if
               adversely determined would adversely affect the Licensed
               Technology (or the patentability thereof) or UKRF's ability to
               enter into or carry out this License Agreement.

          (e)  UKRF represents and warrants to the best of its knowledge and
               belief that UKRF (together with OMRF) is the sole owner of the
               Licensed Technology and such is free of any lien, encumbrance,
               restriction, and other legal or equitable claim, apart from the
               possible non-exclusive 

                                     -22-
<PAGE>
 
               rights held by the United States Government as a result of
               research sponsorship.

          (f)  UKRF further represents and warrants that UKRF has not granted
               (and will not grant during the term of this License Agreement)
               such rights or licenses to the Licensed Technology as set forth
               in the Licensor Grant (other than to Centaur pursuant to Centaur
               License Agreement).

13.  MISCELLANEOUS AND GENERAL
     -------------------------

     13.1  EXPORT CONTROLS.  Astra acknowledges that Licensors are subject to
           ---------------                                                   
United States laws and regulations controlling the export of technical data,
computer software, laboratory prototypes and other commodities and that
Foundation's obligations hereunder are contingent on compliance with all
applicable United State export and other laws and regulations.  The transfer of
certain technical data and commodities may require a license from the cognizant
agency of the United States Government and/or written assurances by Astra that
Astra shall not export data or commodities to certain foreign countries without
prior approval of such agency.  Licensors neither represent that a license shall
not be required nor that, if required, it shall be issued.

     13.2  LEGAL COMPLIANCE.  Astra agrees that it will comply with all
           ----------------                                            
applicable laws and regulations in relation to its manufacture, processing,
producing, use, selling or distributing of Licensed Products and that it will
not at any time take any action which would cause Licensors or Astra to be in
violation of any of such applicable laws and regulations.

     13.3  REQUIRED CONSENTS.  Astra shall obtain any and all licensees,
           -----------------                                            
permits, approvals or authorizations (the "REQUIRED CONSENTS") required by any
governmental entity or agency having jurisdiction over the transactions
contemplated by this License Agreement.  Licensors shall cooperate with, and
provide reasonable assistance to, Astra in obtaining the Required Consents;
provided, however, that Astra shall reimburse Licensors for all of Licensor's
- --------  -------                                                            
out-of-pocket expenses incurred in providing such assistance.

     13.4  INDEPENDENT CONTRACTOR.  Astra's relationship to Licensors hereunder
           ----------------------                                              
shall be that of a license only.  Astra shall not be the agent of Licensors and
shall have no authority to act for or on behalf of Licensors in any matter.
Persons retained by Astra as employees or agents shall not by reason thereof be
deemed to be employees or agents of Licensors.

     13.5  PATENT MARKING.  Astra agrees to mark, to the extent practical, the
           --------------                                                     
Licensed Products sold in the United States with all applicable United States
patent numbers.  All Licensed Products shipped to or sold in other countries
shall be marked, to the extent practical, in such a manner as to conform with
the patent laws and practice of the country of manufacture or sale.

                                     -23-
<PAGE>
 
     13.6  USE OF NAMES.  No name of any Party to this License Agreement, or of
           ------------                                                        
any officer, trustee, director or employee of any Party, may be used by any
Party in any manner for announcing, advertising, promoting or marketing Licensed
Products or Licensed Processes unless the written permission of such Party, or
the individual, as the case may be, is obtained in advance.

     13.7  INTERPRETATION.  The Parties are equally responsible for the
           --------------                                              
preparation of this License Agreement, and in any judicial proceeding the terms
hereof shall not be more strictly construed against one Party than the other.

     13.8  NOTICES.  All notices, statements and reports required or
           -------                                                  
contemplated herein by one Party to the other shall be in writing and shall be
deemed to have been given upon delivery in person or upon the expiration of five
(5) days after the deposit in a lawful mail depository in the country of
residence of the Party giving the notice, registered or certified airmail
postage prepaid, and addressed as follows:

     If to Licensors:
     --------------- 

          OMRF:

               Attention:  President
               Oklahoma Medical Research Foundation
               825 N. E. 13th Street
               Oklahoma City, OK 73104
               Facsimile:  (405) 271-3980

          With a copy to:

               John S. Pratt, Esquire
               Kilpatrick & Cody
               1100 Peachtree Street
               Atlanta, GA 30309-4530
               Facsimile:  (404) 815-6555

          UKRF:

               Director
               Office of Intellectual Property
               University of Kentucky Research Foundation
               120 Graham Avenue

                                     -24-
<PAGE>
 
               Lexington, KY 40506-0051
               Facsimile:

          With a copy to:

               Office of Legal Counsel
               University of Kentucky
               2 Administration Building
               Lexington, KY 40506-0032
               Facsimile:

     If to Astra:
     ----------- 

               Astra AB
               S-151 85 Sodertalje
               Sweden
               Attention:  President and Chief Executive
                           Officer
               Facsimile:  011 46 85 53 29 000

     Any Party hereto may change the address to which notices to such Party are
to be sent by giving notice to the other Parties at the addresses and in the
manner provided above.  Any notice herein required or permitted to be given may
be given, in addition to the manner set forth above, by telex, facsimile or
cable, provided that the Party giving such notice obtains acknowledgement by
telex, facsimile or cable to be notified.  Notice made in this manner shall be
deemed to have been given when such acknowledgement has been transmitted.

     13.9  ASSIGNMENTS AND INUREMENT.  Except as otherwise provided in this
           -------------------------                                       
License Agreement, Astra shall not grant, transfer, convey or otherwise assign
any of its rights or delegate any of its obligations under this License
Agreement (except in the course of a merger, consolidation or acquisition of all
or substantially all of Astra's business) without the prior written consent of
Licensors, which consent shall not be unreasonably withheld or delayed, and any
attempt by Astra to do so shall be of no effect; however, this License Agreement
shall be assignable by each of Licensors, provided that any such assignee has
agreed in writing with Astra to be bound by the terms and provisions of this
License Agreement.  This License Agreement shall be binding upon and inure to
the benefit of the successors and permitted assigns of the Parties hereto.

     13.10  GOVERNING LAW.  This License Agreement shall be construed, governed,
            -------------                                                       
interpreted and applied in accordance with the laws of the State of New York,
except that questions affecting the construction and effect of any patent shall
be determined by the law of 

                                     -25-
<PAGE>
 
the country in which the patent was granted.

     13.11  ENTIRE AGREEMENT.  This License Agreement constitutes the entire
            ----------------                                                
agreement between Licensors and Astra with respect to the subject matter hereof
and shall not be modified, amended or terminated except as herein provided or
except by another agreement in writing executed by the Parties hereto.

     13.12  HEADINGS.  The section and paragraph headings are for convenience
            --------                                                         
only and are not part of this License Agreement.

     13.13  SEVERABILITY.  All rights and restrictions contained herein may be
            ------------                                                      
exercised and shall be applicable and binding only to the extent that they do
not violate any applicable laws and are intended to be limited to the extent
necessary so that they will not render this License Agreement illegal, invalid
or unenforceable.  If any provision or portion of any provision of this License
Agreement not essential to the commercial purpose of this License Agreement
shall be held to be illegal, invalid or unenforceable by a court of competent
jurisdiction, it is the intention of the Parties that the remaining provisions
or portions thereof shall constitute their agreement with respect to the subject
matter hereof, and all such remaining provisions or portions thereof shall
remain in full force and effect.  To the extent legally permissible, any
illegal, invalid or unenforceable provision of this License Agreement shall be
replaced by a valid provision which will implement the commercial purpose of the
illegal, invalid or unenforceable provision.  In the event that any provision
essential to the commercial purpose of this License Agreement is held to be
illegal, invalid or unenforceable and cannot be replaced by a valid provision
which will implement the commercial purpose of this License Agreement, this
License Agreement and the rights granted herein shall terminate.

     13.14  COUNTERPARTS.  This License Agreement may be executed in two or more
            ------------                                                        
counterparts, each of which shall be deemed an original, but all of which shall
constitute one and the same instrument.

     IN WITNESS WHEREOF, the Parties have caused this License Agreement to be
executed by their duly authorized representatives as of the day and year first
above written.

                                     -26-
<PAGE>
 
                         Licensors:
                         --------- 

                         OKLAHOMA MEDICAL RESEARCH FOUNDATION



                         By:_________________________________
                           Dr. William G. Thurman, President
                           hereunto duly authorized


                         UNIVERSITY OF KENTUCKY RESEARCH
                         FOUNDATION



                         By:__________________________________


                           hereunto duly authorized


                         ASTRA:
                         ----- 

                         ASTRA AB
                         (publ)



                         By:__________________________________
                           Hakan Mogren, President and
                           Chief Executive Officer
                           hereunto duly authorized


                                     -27-
<PAGE>
 
                                   EXHIBIT A
                                   ---------
                                      TO
                               LICENSE AGREEMENT
                  MADE AND ENTERED INTO AS OF JUNE ___, 1995
                                 BY AND AMONG
                     OKLAHOMA MEDICAL RESEARCH FOUNDATION,
                                      AND
                THE UNIVERSITY OF KENTUCKY RESEARCH FOUNDATION
                                      AND
                                   ASTRA AB



                           CENTAUR LICENSE AGREEMENT
                           -------------------------
<PAGE>
 
                                   EXHIBIT B
                                   ---------
                                      TO
                               LICENSE AGREEMENT
                  MADE AND ENTERED INTO AS OF JUNE ___, 1995
                                 BY AND AMONG
                     OKLAHOMA MEDICAL RESEARCH FOUNDATION,
                                      AND
                THE UNIVERSITY OF KENTUCKY RESEARCH FOUNDATION
                                      AND
                                   ASTRA AB



                              RESEARCH AGREEMENTS
                              -------------------



<PAGE>
 
                                   EXHIBIT C
                                   ---------
                                      TO
                               LICENSE AGREEMENT
                  MADE AND ENTERED INTO AS OF JUNE ___, 1995
                                 BY AND AMONG
                     OKLAHOMA MEDICAL RESEARCH FOUNDATION,
                                      AND
                THE UNIVERSITY OF KENTUCKY RESEARCH FOUNDATION
                                      AND
                                   ASTRA AB



                          ASTRA INSURANCE CERTIFICATE
                          ---------------------------
<PAGE>
 
                                  APPENDIX 4
                                  ----------
                                      TO
                 DEVELOPMENT, LICENSE AND MARKETING AGREEMENT
                              DATED JUNE 26, 1995
                                    BETWEEN
                         CENTAUR PHARMACEUTICALS, INC.
                                      AND
                                   ASTRA AB
                                        


                        ASTRA STRATEGIC RESEARCH AREAS
                        ------------------------------


[REFERENCE TO APPENDIX 4 REPLACED IN ITS ENTIRETY BY AMENDMENT DATED OCTOBER 7, 
1997 -- SEE EXHIBIT 10.15 TO THE REGISTRATION STATEMENT]
<PAGE>
 
                                  APPENDIX 5
                                  ----------
                                      TO
                 DEVELOPMENT, LICENSE AND MARKETING AGREEMENT
                              DATED JUNE 26, 1995
                                    BETWEEN
                         CENTAUR PHARMACEUTICALS, INC.
                                      AND
                                   ASTRA AB
                                        


                      FIRST AMENDMENT TO CENTAUR LICENSES
                      -----------------------------------


               [SEE EXHIBIT 10.12 TO THE REGISTRATION STATEMENT]

<PAGE>
 
                                                                   EXHIBIT 10.14


                        S U P P L Y   A G R E E M E N T



This Supply Agreement (the "SUPPLY AGREEMENT"), entered into as of June 26, 1995
(the "EFFECTIVE DATE"), is made by and between

ASTRA AB, a corporation organized and existing under the laws of Sweden, S-151
85 Sodertalje, Sweden ("ASTRA")

and

CENTAUR PHARMACEUTICALS, INC., a corporation organized and existing under the
laws of the State of Delaware, 484 Oakmead Parkway, Sunnyvale CA 94086, USA
("CENTAUR").


                                WITNESSETH

         WHEREAS CENTAUR under a Development, License and Marketing Agreement
(the "LICENSE AGREEMENT") dated as of the Effective Date has granted ASTRA
certain worldwide rights to exploit Licensed Product under the CENTAUR
Technology and Product Know-How (all as more particularly set forth in the
License Agreement); and

         WHEREAS ASTRA wishes to purchase from CENTAUR and CENTAUR wishes to
manufacture and supply ASTRA with Substance to be included in Licensed Product,
initially synthesized in smaller quantities for pre-clinical and clinical use
and, later, on a full commercial scale.

         NOW THEREFORE, in consideration of the promises and mutual covenants
herein contained, the parties agree as follows:



1.       DEFINITIONS
         -----------
As used herein, the following terms have the following meanings:

1.1      "AFFILIATE" shall have the meaning given in the License Agreement.
          ---------                                                        

1.2      "ASTRA LICENSE" shall have the meaning provided in Section 2.1 of the
          -------------                                                       
         License Agreement.

1.3      "BANKRUPTCY" shall have the meaning provided in Paragraph 10.3 hereof.
          ----------                                                           

1.4      "CENTAUR TECHNOLOGY" shall have the meaning provided in the License
          ------------------                                                

- --------------------------------------------------------------------------------
[*] - Confidential treatment is being sought with respect to this portion of 
      this agreement.  This portion has been omitted from this filing and has 
      been filed separately with the Securities and Exchange Commission.

                                      -1-
<PAGE>
 
         Agreement.

1.5      "CONFIDENTIAL INFORMATION" shall have the meaning provided in the
          ------------------------                                        
         License Agreement.

1.6      "DEFAULT" shall have the meaning provided in Paragraph 10.2 hereof.
          -------                                                           

1.7      "FIELD" shall have the meaning provided in the License Agreement.
          -----                                                           

1.8      "FORCE MAJEURE PERIOD" shall have the meaning provided in Paragraph 6.3
          --------------------                                                  
         hereof.

1.9      "FORCE MAJEURE PERIOD AS EXTENDED" shall have the meaning provided in
          --------------------------------                                    
         Paragraph 6.3 hereof.

1.10     "FORCE MAJEURE SUPPLY PAYMENTS" shall have the meaning provided in
          -----------------------------                                    
         Paragraph 6.3 hereof.

1.11     "LICENSE AGREEMENT" means the Development, License and Marketing
          -----------------                                              
         Agreement entered into by CENTAUR and ASTRA on the same date as this
         Supply Agreement, under which CENTAUR has granted ASTRA certain rights
         to commercialize Licensed Product throughout the world.

1.12     "MANUFACTURING COST" means CENTAUR's actual cost for the manufacture of
          ------------------                                                    
         Substance, not including any development costs, and calculated as the
         sum of the following, all determined in accordance with generally
         accepted accounting practices:

         (a)  Direct material cost; and

         (b)  Direct labor cost, including benefits; and

         (c)  A fair portion of manufacturing overhead and indirect
              manufacturing costs; and

         (d)  A fair portion of administrative costs; and

         (e)  Quality control; and

         (f)  Handling and warehousing costs.

         Where standard cost is employed, such cost of production will include
         normal variances, e.g. price variances, yield variances and other
         variances associated 

                                      -2-
<PAGE>
 
         with the relevant production.

1.13     "OKLAHOMA/KENTUCKY LICENSE" shall have the meaning provided in the
          -------------------------                                        
         License Agreement.

1.14     "PRODUCT KNOW-HOW" means all enabling information with respect to
          ----------------                                                
         production and quality control of Substance (including patented
         processes), now owned by or licensed to CENTAUR or hereinafter acquired
         or developed by CENTAUR or ASTRA during the Term of this Supply
         Agreement.

1.15     "RECOMMENCEMENT NOTICE" shall have the meaning provided in Paragraph
          ---------------------                                              
         6.3 hereof.

1.16     "SPECIFICATIONS" shall have the meaning provided in Paragraph 7.1
          --------------                                                  
         hereof.

1.17     "STEERING COMMITTEE" shall have the meaning provided in the License
          ------------------                                                
         Agreement.

1.18     "SUBSTANCE(S)" means the active ingredient(s) included in Licensed
          ------------                                                     
         Product.

         Other capitalized terms not defined herein shall have the meaning
         provided in the License Agreement, unless the context clearly requires
         otherwise.  In case of a conflict between this Supply Agreement and the
         License Agreement, the License Agreement shall govern.

1.19     "TERM" shall have the meaning provided in Paragraph 10.1 hereof.
          ----                                                           



2.       REGULATORY CLEARANCE
         --------------------

2.1      CENTAUR TO SECURE REGULATORY APPROVALS.  CENTAUR will use its best
         --------------------------------------                            
         reasonable efforts in the performance of its obligations under this
         Supply Agreement to obtain all regulatory approvals necessary or
         appropriate for the manufacture or supply of Substance for Licensed
         Product and promptly provide ASTRA with such information regarding the
         manufacture and quality control of Substance for Licensed Product
         necessary to permit ASTRA to secure approvals to carry out clinical
         studies and for marketing authorization of Licensed Product worldwide.
         CENTAUR's obligations to obtain regulatory approvals shall include,
         without limitation, the following:

         (a)      MANUFACTURING APPROVAL.  CENTAUR will prepare a Drug Master
                  ----------------------                                     
                  File and/or a Plant Master File, as applicable for each
                  Substance (collectively the "DOCUMENTATION") in accordance
                  with 

                                      -3-
<PAGE>
 
                  the requirements of relevant regulatory authorities in
                  countries where ASTRA intends to use and sell Licensed
                  Product. The Documentation will comply with relevant
                  regulations and standards existing from time to time in the EC
                  countries, the United States and Japan.

         (b)      RIGHT OF REFERENCE.  CENTAUR will provide to all regulatory
                  ------------------                                         
                  authorities and to ASTRA (i) on filing of its Drug Master File
                  or Plant Master File, and thereafter for new filings, (ii) at
                  the time of submission of an NDA, any statement or other
                  document necessary or appropriate to permit and authorize
                  ASTRA or ASTRA's sublicensees to cross-reference CENTAUR's
                  Drug Master File or Plant Master File when and as deemed
                  necessary by ASTRA.

         (c)      GOOD MANUFACTURING PRACTICES.  CENTAUR will undertake such
                  ----------------------------                              
                  steps to insure, with respect to each Substance, manufacturing
                  compliance with all regulatory approvals, including, without
                  limitation, "GOOD MANUFACTURING PRACTICES" and will permit
                  ASTRA to conduct GMP audits at CENTAUR's manufacturing
                  facilities from time to time.

         (d)      REGULATORY INSPECTION.  Should any national or international
                  ---------------------                                       
                  regulatory authority give notice of intent to conduct an
                  inspection at CENTAUR's manufacturing plant or take any other
                  regulatory action with respect to the manufacture and supply
                  of Substance, CENTAUR will promptly give ASTRA notice thereof,
                  supply all information pertinent thereto, and ASTRA shall have
                  the right, but not the obligation, to be present and take part
                  in any such inspection or regulatory action.

         (e)      CONTACT WITH REGULATORY AUTHORITIES.  CENTAUR will be
                  -----------------------------------                  
                  responsible for all contacts with the regulatory authorities
                  with respect to the Documentation after it has been submitted
                  to the relevant authority and will continuously keep the
                  Documentation updated (with copies to ASTRA) with respect to
                  developments and changes in production methods, quality,
                  specifications or in other respects of the Licensed Product.

         (f)      REGULATORY APPROVAL - LICENSED PRODUCT.  CENTAUR will use its
                  --------------------------------------                       
                  best reasonable efforts to assist ASTRA in providing to
                  regulatory authorities all information with respect to the
                  manufacture or quality control of Substance necessary for

                                      -4-
<PAGE>
 
                  regulatory approval of Licensed Product.

         (g)      REFERENCE STANDARD.  CENTAUR shall provide ASTRA from time to
                  ------------------                                           
                  time with reasonable quantities of Substance of reference
                  standard quality for analytical purposes.

         (h)      CENTAUR TO INFORM ASTRA.  With respect to CENTAUR's
                  -----------------------                            
                  undertakings set forth in this Paragraph 2.1 hereof, CENTAUR
                  shall regularly inform ASTRA of the status of such
                  undertakings including, without limitation, the preparation
                  and progress of Documentation.  All Documentation shall be
                  subject to ASTRA's prior written approval prior to submission
                  by CENTAUR to regulatory authorities.

ASTRA will collaborate with CENTAUR in the performance of CENTAUR's undertakings
pursuant to Paragraph 2.1 hereof and shall provide documents in ASTRA's
possession which would assist CENTAUR with respect to such obligations.



3.       CENTAUR COMPENSATION
         --------------------

3.1      TOTAL COMPENSATION.  As total compensation to CENTAUR for CENTAUR's
         ------------------                                                 
         obligations undertaken pursuant to this Supply Agreement and the supply
         of Substance for Licensed Product, ASTRA shall pay to CENTAUR a supply
         price as follows:

         (a)      CLINICAL TRIALS AND SAMPLING.  The supply price paid by ASTRA
                  ----------------------------                                 
                  for all Substance (and any placebo or other materials, implant
                  or device) used in pre-clinical and clinical trials of
                  Licensed Product shall be an amount equal to [*].

         (b)      COMMERCIAL SALES.   The supply price paid by ASTRA for all
                  ----------------                                          
                  Substance, other than that covered by Paragraph 3.1(a) hereof,
                  shall be an amount equal to [*].  CENTAUR shall use its best
                  reasonable efforts at all times to minimize Manufacturing
                  Cost.



4.       SUPPLY FOR PRE-CLINICAL AND CLINICAL USE
         ----------------------------------------

4.1      PRE-CLINICAL AND CLINICAL SUPPLIES OF SUBSTANCE.  Subject to the
         -----------------------------------------------                 
         provisions of this Supply Agreement, and to ASTRA taking over some or
         all of the manufacture and supply of Substance for Licensed Product, as
         contemplated by 

                                      -5-
<PAGE>
 
         Paragraphs 6.2, 6.3 and 11.2 hereof, CENTAUR will manufacture and
         supply all Substance for Licensed Product required by ASTRA and its
         sublicensees, including substance for pre-clinical and clinical trials.

4.2      FORECAST AND DELIVERY SCHEDULE.  CENTAUR undertakes to supply Substance
         ------------------------------                                         
         for pre-clinical and clinical use within sixty (60) days of ASTRA's
         firm order.  ASTRA will give CENTAUR forecasts of its expected need of
         Substance for pre-clinical and clinical use in such manner as agreed
         upon in the Steering Committee.



5.       SUPPLY FOR COMMERCIAL USE
         -------------------------

5.1      SUPPLY FOR COMMERCIAL USE.  CENTAUR undertakes on an exclusive basis to
         -------------------------                                              
         manufacture and supply Substance to ASTRA for commercial use in the
         Field.

5.2      FORECAST.  ASTRA will, before each January 1, April 1, July 1 and
         --------                                                         
         October 1, present to CENTAUR a written forecast estimating the
         quantities of Substance to be delivered during each of the next fifteen
         (15) months.

5.3      FIRM ORDERS.  ASTRA will place firm orders for delivery not less than
         -----------                                                          
         ninety (90) days prior to the required shipment date, and CENTAUR will
         be obliged to deliver all ordered Substance by the delivery date stated
         in the order, except to the extent that such supply would exceed the
         latest forecast given by more than twenty percent (20%) for the month
         in question.

5.4      DELIVERY TERMS.  Each delivery of Substance will be effected Ex Works
         --------------                                                       
         CENTAUR's plant, in accordance with Incoterms 1990, as published by the
         International Chamber of Commerce.  All quantities of Substance will be
         delivered suitably packed for transportation.



6.       PURCHASE UNDERTAKING AND MANUFACTURING LICENSE
         ----------------------------------------------

6.1      EXCLUSIVE SUPPLY.  Subject to Paragraphs 6.2, 6.3 and 11.2 of this
         ----------------                                                  
         Supply Agreement, ASTRA undertakes to purchase from CENTAUR all
         Substance needed by ASTRA for the formulation of Licensed Product to be
         sold throughout the world.

6.2      ASTRA'S MANUFACTURE OF SUBSTANCE.  The parties recognize the value of a
         --------------------------------                                       
         second source of supply of Substance for Licensed Product for risk
         management and backup purposes.  ASTRA shall be entitled under the
         ASTRA License to manufacture or have manufactured up to ten percent
         (10%) of ASTRA's (or ASTRA's sublicensees) total requirement of
         Substance.  

                                      -6-
<PAGE>
 
         Notwithstanding such manufacture by ASTRA (or have manufactured), ASTRA
         shall, other than for Substance with respect to the provisions of
         Paragraph 3.1(a) hereof, pay to CENTAUR with respect to such
         manufacture an amount equal to [*] of Manufacturing Cost as if such
         Substance had been manufactured by CENTAUR.

6.3      FORCE MAJEURE - MANUFACTURE.  If for a period of three hundred sixty
         ---------------------------                                         
         five (365) days or less (the "FORCE MAJEURE PERIOD") CENTAUR shall, for
         reasons of force majeure, be unable to supply ASTRA (or ASTRA's
         sublicensees) with substantially all requirements of Substance for pre-
         clinical, clinical or commercial use, ASTRA will be free during the
         Force Majeure Period to manufacture or have manufactured Substance on a
         commercial scale for all of ASTRA's (or ASTRA's sublicensees)
         requirements of Substance.  Within ninety (90) days following
         commencement of a Force Majeure Period, CENTAUR shall certify by notice
         in writing to ASTRA (i) CENTAUR's intent to recommence manufacture of
         Substance as soon as reasonably practical, but prior to termination of
         the Force Majeure Period (the "RECOMMENCEMENT NOTICE"), or (ii)
         terminate this Supply Agreement pursuant to Paragraph 10.4 hereof, but
         effective as of the commencement of the Force Majeure Period.  If
         CENTAUR delivers the Recommencement Notice, CENTAUR shall continuously
         advise ASTRA, from time to time, as to the date CENTAUR will recommence
         manufacture of Substance, and ASTRA shall pay to CENTAUR with respect
         to such manufacture of Substance by ASTRA during the Force Majeure
         Period, an amount equal to [*] of the Manufacturing Cost, less all
                                                                   ----
         sums paid or payable to CENTAUR from insurance policies for "business
         loss", or "business interruption insurance" arising out of the event of
         force majeure (the "FORCE MAJEURE SUPPLY PAYMENTS").  Notwithstanding
         the Recommencement Notice, CENTAUR may, within thirty (30) days prior
         to termination of the Force Majeure Period, by written notice to ASTRA,
         extend the Force Majeure Period, for an additional period of one
         hundred twenty (120) days (the "FORCE MAJEURE PERIOD AS EXTENDED"),
         provided that during the Force Majeure Period As Extended, ASTRA shall
         make no Force Majeure Supply Payments to CENTAUR.  In the event CENTAUR
         shall fail to recommence manufacture of Substance prior to termination
         of the Force Majeure Period or the Force Majeure Period As Extended, as
         the case may be, CENTAUR shall be deemed to have terminated this Supply
         Agreement pursuant to Paragraph 10.4 hereof, effective as of the
         commencement of the Force Majeure Period, and ASTRA shall be entitled
         to a return of all Force Majeure Supply Payments, or at ASTRA's
         election, to deduct such Force Majeure Supply Payments from Net Sales
         royalties payable to CENTAUR pursuant to the License Agreement.

                                      -7-
<PAGE>
 
6.4      ASTRA IMPROVEMENTS TO PRODUCT KNOW-HOW.  In the event that ASTRA
         --------------------------------------                          
         develops improvements to Product Know-How, such improvements will be
         shared cost free with CENTAUR, which shall be free to use said
         improvements in its own manufacture of Substance.

6.5      ACCESS TO CENTAUR TECHNOLOGY AND PRODUCT KNOW-HOW.  In order to permit
         -------------------------------------------------                     
         ASTRA the full use and enjoyment of the ASTRA License, CENTAUR shall,
         on the Effective Date and from time to time thereafter during the Term
         of this Supply Agreement, make available to ASTRA all CENTAUR
         Technology and Product Know-How.

6.6      NOTIFICATION OF EVENTS CONCERNING SUPPLY.  CENTAUR will promptly notify
         ----------------------------------------                               
         ASTRA of any circumstances that may be of importance as to CENTAUR's
         ability to supply ASTRA with Substance.  In the event ASTRA should
         commence manufacture of Substance as provided herein, CENTAUR will
         support ASTRA or its nominee in setting up a well functioning
         production, i.a. by furnishing ASTRA or its nominee with information,
         know-how and advice regarding processing and choice of machinery,
         equipment, etc.



7.       QUALITY
         -------

7.1      GUARANTY OF QUALITY.  CENTAUR covenants and warrants that the quality
         -------------------                                                  
         of Substance to be supplied by CENTAUR hereunder shall correspond to
         the most stringent of the following: (i) CENTAUR standards, (ii) the
         mutually established specifications to be subsequently annexed to this
         Supply Agreement as Appendix A, (iii) the applicable provisions of the
                             ----------                                        
         U.S. Food, Drug and Cosmetic Act and corresponding regulations within
         EC and Japan, and (iv) all applicable GMP standards (alternatively the
         "SPECIFICATIONS").

7.2      ASTRA INSPECTION.  Within sixty (60) days following receipt of each
         ----------------                                                   
         shipment and before Substance is put into further production, whichever
         is first to occur, ASTRA shall carry out customary tests and
         inspections as separately agreed between the parties.  Should any
         quantity of Substance be found not to conform with the Specifications,
         CENTAUR shall, at its sole cost, replace the defective quantity without
         delay, provided that ASTRA has notified CENTAUR of such non-conformity
         within ninety (90) days following receipt of the defective quantity of
         Substance.

7.3      CHANGES IN MANUFACTURING PROCESS.  No changes shall be made in the
         --------------------------------                                  
         processes or specifications used in producing Substance for Licensed
         Product without agreement by both parties.  If such changes are
         required for regulatory reasons, neither party shall unreasonably
         withhold its consent to such changes.

                                      -8-
<PAGE>
 
7.4      INSPECTION.  ASTRA shall be entitled to visit and inspect any CENTAUR's
         ----------                                                             
         manufacturing site involved in the manufacture of Substance at any
         reasonable time, upon prior notice.

7.5      COMPLIANCE.  CENTAUR covenants and warrants that all production of
         ----------                                                        
         Substance carried out hereunder will be performed in compliance with
         (i)  the Specifications, (ii) applicable law, (iii) applicable Good
         Manufacturing Practice (GMP), and (iv) relevant health and
         environmental authorities' directions.



8.   REPRESENTATIONS AND WARRANTIES
     ------------------------------

8.1      GENERAL REPRESENTATIONS.  Each party hereby represents and warrants to 
         -----------------------
         the other as follows:

         (a)      DULY ORGANIZED.  It is a corporation duly organized, validly
                  --------------                                              
                  existing and is in good standing under the laws of the
                  jurisdiction of its incorporation, is qualified to do business
                  and is in good standing as a foreign corporation in each
                  jurisdiction in which the conduct of its business or the
                  ownership of its properties requires such qualification and
                  has all requisite power and authority, corporate or otherwise,
                  to conduct its business as now being conducted, to own, lease
                  and operate its properties and to execute, deliver and perform
                  this Supply Agreement.

         (b)      DUE EXECUTION.  The execution, delivery and performance by it
                  -------------                                                
                  of this Supply Agreement have been duly authorized by all
                  necessary corporate action and do not and will not (i) require
                  any consent or approval of its stockholders, (ii) violate any
                  provision of any law, rule, regulation, order, writ, judgment,
                  injunction, decree, determination or award presently in effect
                  having applicability to it or any provision of its charter or
                  by-laws, or (iii) result in a breach of or constitute a
                  default under any material agreement, mortgage, lease,
                  license, permit, patent or other instrument or obligation to
                  which it is a party or by which it or its assets may be bound
                  or affected.

         (c)      NO THIRD PARTY APPROVAL.  No authorization, consent, approval,
                  -----------------------                                       
                  license, exemption of, or filing or registration with, any
                  court or governmental authority or regulatory body is required
                  for the due execution, delivery or performance by it of this
                  Supply Agreement.

                                      -9-
<PAGE>
 
         (d)      BINDING AGREEMENT.  This Supply Agreement is a legal, valid
                  -----------------                                          
                  and binding obligation of such party, enforceable against it
                  in accordance with its terms and conditions, except as may be
                  limited by bankruptcy laws or other laws affecting the rights
                  of creditors generally, and rules of law governing equitable
                  remedies.  It is not under any obligation to any person,
                  contractual or otherwise, that is conflicting or inconsistent
                  in any respect with the terms of this Supply Agreement or that
                  would impede the diligent and complete fulfillment of its
                  obligations hereunder.

         (e)      GOVERNMENTAL STATUS.  It is not debarred or suspended from
                  -------------------                                       
                  receiving contracts from the United States or Swedish
                  government or other governmental authority or agency.

         (f)      FULL DISCLOSURE.  Each party has disclosed to the other in
                  ---------------                                           
                  good faith any and all material information relevant to the
                  subject matter of this Supply Agreement and to such party's
                  ability to observe and perform its obligations hereunder, and
                  each party covenants on and after the Effective Date to
                  provide to the other such additional material information
                  which may, or with the passage of time, effect the subject
                  matter of this Supply Agreement or the ability of such party
                  to observe and perform its obligations hereunder.

8.2      CENTAUR REPRESENTATIONS.  CENTAUR covenants, represents and warrants to
         -----------------------                                                
         ASTRA that

         (a)      CENTAUR is the owner or licensee, as the case may be, of the
                  CENTAUR Technology and Product Know-How and the same are free
                  of any liens, encumbrances, restrictions and other legal or
                  equitable claims of any kind or nature, excepting the rights
                  of grantors of the CENTAUR Licenses,

         (b)      CENTAUR has the right to grant the ASTRA License, and

         (c)      CENTAUR has not granted and will not grant during the Term of
                  this Supply Agreement any license or sublicense of the CENTAUR
                  Licenses, CENTAUR Technology and Product Know-How in the
                  Field.


9.       CONFIDENTIAL INFORMATION
         ------------------------

                                      -10-
<PAGE>
 
9.1      CONFIDENTIAL INFORMATION.  Confidential Information shall be treated as
         ------------------------                                               
         provided in the License Agreement.



10.      TERM AND TERMINATION
         --------------------

10.1     TERM.  The Term of this Supply Agreement (the "TERM") shall commence 
         ----
         as of the Effective Date. Unless sooner terminated pursuant to
         Paragraphs 10.2 or 10.3 hereof, the Term of this Supply Agreement shall
         expire at such time as the License Agreement expires.

10.2     DEFAULT.  Failure by either party to comply with any of its material
         ------- 
         obligations contained in this Supply Agreement following notice and
         opportunity to cure, as hereinafter provided (a "DEFAULT") shall
         entitle the other party to terminate this Supply Agreement.  The non-
         defaulting party shall give the other party notice specifying the
         nature of the breach of this Supply Agreement and requiring it to cure.
         If such breach is not cured within ninety (90) days after the receipt
         of such notice (or one hundred twenty (120) days in event such breach
         cannot be reasonably expected to be cured within ninety (90) days, and
         the defaulting party gives notice to the other party of its inability
         to cure such breach within a 90-day period and the defaulting party
         thereafter uses reasonable efforts to cure such breach as soon as
         practicable, but in no event longer than one hundred twenty (120)
         days), the notifying party shall be entitled, without prejudice to any
         of its other rights under this Supply Agreement, and in addition to any
         other remedies available to it by law or in equity, to terminate this
         Supply Agreement by giving notice to that effect to the defaulting
         party.  The right of either party to terminate this Supply Agreement,
         as hereinabove provided, shall not be affected in any way by its waiver
         or failure to take action with respect to any previous Default.
         Notwithstanding the foregoing, and other than as provided in Paragraph
         10.3 hereof, a party shall not have a right to terminate this Supply
         Agreement in the event the other party pursuant to Paragraph 12 has
         sought to resolve the dispute for which termination is being sought.

10.3     INSOLVENCY OR BANKRUPTCY.  Either party may, in addition to any other 
         ------------------------ 
         remedies available to it by law or in equity, terminate this Supply
         Agreement by written notice to the other party in the event (i) the
         other party shall have become insolvent or bankrupt, or shall have made
         an assignment for the benefit of its creditors, or (ii) there shall
         have been appointed a trustee or receiver of the other party or for all
         or a substantial part of its property, or (iii) any case or proceeding
         shall have been commenced or some other action taken by or against the
         other party in bankruptcy or seeking reorganization, liquidation,

                                      -11-
<PAGE>
 
         dissolution, winding-up, arrangement, composition or readjustment of
         its debts or any other relief under any bankruptcy, insolvency,
         reorganization or other similar act or law of any jurisdiction now or
         hereafter in effect or there shall have been issued a warrant of
         attachment, execution, distraint or similar process against any
         substantial part of the property of the other party, and any such event
         or action (except where a party voluntarily takes such actions (e.g.,
         where a party makes a bankruptcy filing)) shall have continued for
         ninety (90) days undismissed, unbounded and undischarged (alternatively
         a "BANKRUPTCY"); provided, however, that no such right to terminate
         shall pertain solely by virtue of a voluntary reorganization for the
         purpose of solvent amalgamation or reconstruction.

10.4     TERMINATION BY CENTAUR.  CENTAUR may, on six (6) months' prior notice
         ----------------------                                               
         to ASTRA terminate this Supply Agreement, whereupon CENTAUR shall
         provide all reasonable assistance to ASTRA pursuant to Paragraph 6.5
         hereof to establish a manufacturing facility for Substance.

10.5     EFFECT OF TERMINATION OF SUPPLY AGREEMENT.
         ----------------------------------------- 

         (a)      EXISTING OBLIGATIONS.  Upon termination of this Supply
                  --------------------                                  
                  Agreement for any reason, nothing herein shall be construed to
                  release either party from any obligation that matured prior to
                  the effective date of such termination.

         (b)      MANUFACTURE OF SUBSTANCE BY ASTRA.  Upon termination of this
                  ---------------------------------                           
                  Supply Agreement pursuant to Paragraphs 6.3, 10.1, 10.4, a
                  Default or Bankruptcy by CENTAUR pursuant to Paragraphs 10.2
                  or 10.3 or a Takeover Event pursuant to Paragraph 11.2 hereof,
                  ASTRA shall be entitled pursuant to the ASTRA License to the
                  exclusive worldwide right and license to manufacture, or have
                  manufactured, Substance for Licensed Product for ASTRA (and
                  ASTRA's sublicensees), without compensation to CENTAUR
                  pursuant to this Supply Agreement.

         (c)      EXPIRATION OF TERM OR CENTAUR DEFAULT OR BREACH.  Upon
                  -----------------------------------------------       
                  termination of this Supply Agreement (i) at the expiration of
                  the Term, or (ii) by ASTRA as a result of (x) a Default by
                  CENTAUR hereunder or under the License Agreement, or (y) the
                  Bankruptcy of CENTAUR, or (iii) by CENTAUR pursuant to
                  Paragraph 10.4 hereof, the following provisions of this Supply
                  Agreement shall survive such termination:

                  Paragraph 11.12 -  CENTAUR Indemnification

                                      -12-
<PAGE>
 
                  Paragraph 11.14 -  Governing Law
                  Paragraph 12    -  Resolution of Disputes

         (d)      EXPIRATION OF TERM OR ASTRA DEFAULT OR BREACH.  Upon the
                  ---------------------------------------------           
                  termination of this Supply Agreement (i) at the expiration of
                  the Term, or (ii) by CENTAUR as a result of (x) a Default by
                  ASTRA hereunder or under the License Agreement, or (y) the
                  Bankruptcy of ASTRA, the following provisions of this Supply
                  Agreement shall survive such termination:

                  Paragraph 6.4   -  ASTRA's Improvements to  Product Know-How
                  Paragraph 11.11 -  ASTRA Indemnification
                  Paragraph 10.14 -  Governing Law
                  Paragraph 12    -  Resolution of Disputes



11.      MISCELLANEOUS PROVISIONS
         ------------------------

11.1     NO PARTNERSHIP.  Nothing in this Supply Agreement is intended or shall 
         --------------
         be deemed to constitute a partnership, agency, employer, employee or
         joint venture relationship between the parties. Neither party shall
         incur any debts or make any commitments for the other.

11.2     ASSIGNMENTS.  Except as otherwise provided herein, neither this Supply 
         -----------
         Agreement nor any interest hereunder shall be assignable by either
         party by operation of law or otherwise without the prior written
         consent of the other; provided, however, that either party may assign
         this Supply Agreement to any wholly-owned subsidiary or to any
         successor by merger or sale of substantially all of its assets to which
         this Supply Agreement relates in a manner such that the assignor shall
         remain liable and responsible for the performance and observance of all
         its duties and obligations hereunder, or if the assignor disappears
         because of such transaction, the assignee must agree to abide by the
         terms and conditions of this Supply Agreement, provided, however, that
         if a third party engaged in the manufacture and/or sale of
         pharmaceutical products acquires in one (1) or a series of transactions
         more than thirty percent (30%) of the capital stock of CENTAUR entitled
         to vote for directors (the "TAKEOVER EVENT"), ASTRA may, at its option,
         within one hundred eighty (180) days following notice to ASTRA of such
         Takeover Event, upon twelve (12) months' prior notice to CENTAUR,
         terminate this Supply Agreement, in which event ASTRA may undertake the
         manufacture of Substance for Licensed Product for ASTRA's (and ASTRA's
         sublicensees) use worldwide pursuant to Paragraph 10.5(b).

                                      -13-
<PAGE>
 
11.3     FORCE MAJEURE.  Neither party shall be liable to the other for loss 
         -------------
         or damages or shall have any right to terminate this Supply Agreement
         for any default or delay (including, without limitation, an inability
         to supply Licensed Product) attributable to any act of God, earthquake,
         flood, fire, explosion, strike, lockout, labor dispute, casualty or
         accident, war, revolution, civil commotion, act of public enemies,
         blockage or embargo, injunction, law, order, proclamation, regulation,
         ordinance, demand or requirement of any government or subdivision,
         authority (including, without limitation, drug regulatory authorities)
         or representative of any such government, or any other cause beyond the
         reasonable control of such party, if the party affected shall give
         prompt notice of any such cause to the other party. The party providing
         such notice shall thereupon be excused from such of its obligations
         hereunder as it is so disabled and for thirty (30) days thereafter,
         subject, however, to CENTAUR's obligations pursuant to Paragraph 6.3
         hereof as regards the Force Majeure Period.

11.4     NO TRADEMARK RIGHTS.  No right, express or implied, is granted by this 
         -------------------
         Supply Agreement to use in any manner any trade name or trademark of
         CENTAUR or ASTRA in connection with the performance of this Supply
         Agreement or the exploitation of any license granted hereunder; each
         party may make any legally required reference to the other in
         connection with such manufacture or sale of Licensed Product.

11.5     PUBLIC ANNOUNCEMENTS.  Copies of press releases or similar written 
         --------------------
         communications containing a party's name shall be provided to that
         party prior to release.

11.6     ENTIRE AGREEMENT OF THE PARTIES; AMENDMENT.  This Supply Agreement and 
         ------------------------------------------ 
         the License Agreement constitutes and contains the entire understanding
         and agreement of the parties, and cancels and supersedes any and all
         prior negotiations, correspondence and understandings and agreements,
         whether verbal or written, between the parties respecting the subject
         matter hereof. No waiver, modification or amendment of any provision of
         this Supply Agreement shall be valid or effective unless made in
         writing and signed by a duly authorized officer of each of the parties.

11.7     SEVERABILITY.  In the event any one or more of the provisions of this 
         ------------
         Supply Agreement should for any reason be held by any court or
         authority having jurisdiction over this Supply Agreement or either of
         the parties to be invalid, illegal or unenforceable, such provision or
         provisions shall be validly reformed by addition or deletion of wording
         as appropriate to avoid such result and as nearly as possible
         approximate the intent of the parties and, if unreformable,

                                      -14-
<PAGE>
 
         shall be divisible and deleted in such jurisdiction to the extent
         necessary to comply with such holding, and in all other jurisdictions,
         this Supply Agreement shall not be affected; provided, however, that no
         such reformation shall be made if the effect of such reformation would
         be such as to fundamentally alter the terms of this Supply Agreement
         beyond the intent of the parties.

11.8     CAPTIONS.  The captions to this Supply Agreement are for convenience 
         --------
         only, and are to be of no force or effect in construing or interpreting
         any of the provisions of this Supply Agreement.

11.9     NOTICE AND DELIVERY.  Any notice, requests, delivery, approval or 
         -------------------
         consent required or permitted to be given under this Supply Agreement
         shall be in writing and shall be deemed to have been sufficiently given
         if delivered in person, delivered by internationally recognized
         courier, telegraph or sent by registered air mail letter to the party
         (which notice shall be considered effective when received) to whom it
         is directed at its address shown below or such other address as such
         party shall have last given by notice to the other party.

                  If to CENTAUR, addressed to:

                  President and Chief Executive Officer
                  Centaur Pharmaceuticals, Inc.
                  484 Oakmead Parkway
                  Sunnyvale CA 94086, USA


                  If to ASTRA, addressed to:

                  President and Chief Executive Officer
                  Astra Production Chemicals AB
                  S-151 85 Sodertalje
                  Sweden


11.10    LIMITATION OF LIABILITY.  Neither party shall be liable to the other 
         -----------------------
         for indirect, incidental or consequential damages arising out of any of
         the terms or conditions of this Supply Agreement or with respect to its
         performance or lack thereof, except in the case of a Default resulting
         from a wreckless or intentional breach of its material obligations
         hereunder.

11.11    ASTRA INDEMNIFICATION.  ASTRA shall indemnify, defend and hold CENTAUR
         ---------------------                                                 
         and each of its officers, directors, employees, agents and consultants
         and their respective heirs and assigns (each a "CENTAUR INDEMNITEE")
         harmless from and against all third party costs, claims, suits,
         expenses (including reasonable attorneys' fees) and damages arising out
         of or 

                                      -15-
<PAGE>
 
         resulting from (i) the development, testing, manufacture, sale,
         use or promotion by ASTRA, or ASTRA's sublicensees, of any Licensed
         Product, (ii) a claim of product liability with respect to a Licensed
         Product (including, without limitation, a cause of action in the form
         of tort, warranty or strict liability), (iii) arising out of any other
         activity carried out by ASTRA or ASTRA's sublicensees pursuant to this
         Supply Agreement, provided, however, that the CENTAUR Indemnitee gives
         reasonable notice to ASTRA of any such claim or action, tenders the
         defense of such claim or action to ASTRA and assists ASTRA, at ASTRA's
         expense, in defending such claim or action and does not compromise or
         settle such claim or action without ASTRA's prior written consent,
         provided, however, that ASTRA's indemnification of CENTAUR hereunder
         ------------------                                                  
         shall not extend to any cost, claim, suit, expense or damage which
         arises or results from any gross negligence or intentional misconduct
         of CENTAUR, or any third party for whom CENTAUR is responsible, in the
         manufacture of Substance for Licensed Product by CENTAUR which results
         in the failure of CENTAUR to manufacture Substance for Licensed Product
         in accordance with the Specifications.

11.12    CENTAUR INDEMNIFICATION.  CENTAUR shall indemnify, defend and hold 
         -----------------------   
         ASTRA and each of its officers, directors, employees, agents and
         consultants (and their respective heirs and assigns) (each an "ASTRA
         INDEMNITEE") harmless from (i) any gross negligence or intentional
         misconduct of CENTAUR, or any third party for whom CENTAUR is
         responsible, in the manufacture of Substance for Licensed Product by
         CENTAUR which results in the failure of CENTAUR to manufacture
         Substance for Licensed Product in accordance with the Specifications,
         and provided, further, that the ASTRA Indemnitee gives reasonable
         notice to CENTAUR of any such claims or action, tenders the defense of
         such claim or action to CENTAUR and assists CENTAUR at CENTAUR's
         expense in defending such claim or action and does not compromise or
         settle such claim or action without CENTAUR's prior written consent.

11.13    REMEDIES CUMULATIVE.  The remedies provided hereunder are cumulative 
         -------------------
         and not exclusive.

11.14    GOVERNING LAW.  This Supply Agreement shall be governed by and 
         -------------
         construed in accordance with the laws of the State of New York without
         regard to the conflict of laws provisions thereof.



12.   RESOLUTION OF DISPUTES
      ----------------------

12.1     DISPUTE RESOLUTION PROCESS.  The parties shall resolve all disputes
         --------------------------                                         
         with respect 

                                      -16-
<PAGE>
 
         to any matter relating to this Supply Agreement pursuant to Section 22
         of the License Agreement.

         IN WITNESS WHEREOF, the parties have caused this Supply Agreement to be
executed by their respective duly authorized officers as of June 26, 1995, each
copy of which shall for all purposes be deemed to be an original.

CENTAUR PHARMACEUTICALS, INC.            ASTRA AB                     
                                                                      
                                         (PUBL)                       
                                                                      
                                                                      
By:  /s/ Brian D. Frenzel                By:  /s/ Hakan Mogren        
   ----------------------                   ------------------        
 Brian D. Frenzel,                            Hakan Mogren            
 President and                                President and    
 Chief Executive Officer                      Chief Executive Officer 
 hereunto duly authorized                     hereunto duly authorized 

                                      -17-
<PAGE>
 
                                   APPENDIX A
                                   ----------
                                        
                                       TO
                                SUPPLY AGREEMENT
                              DATED JUNE 26, 1995
                                    BETWEEN
                         CENTAUR PHARMACEUTICALS, INC.
                                      AND
                                    ASTRA AB
                                        


                                SPECIFICATIONS
                                --------------

<PAGE>
 
                                                                   EXHIBIT 10.15

                    AMENDMENT TO DEVELOPMENT, LICENSE AND 
                    MARKETING AGREEMENT ENTERED INTO AS OF 
                    JUNE 26, 1995, AND MADE BY AND BETWEEN 
                  ASTRA AB AND CENTAUR PHARMACEUTICALS, INC.
                                        
                                        
This Amendment, entered into July 8, 1997, is made by /1/ and between Astra AB, 
a corporation organized and existing under the laws of Sweden, S-151 85
Sodertalje, Sweden ("Astra") and Centaur Pharmaceuticals, Inc. a corporation
organized and existing under the laws of the State of Delaware, 484 Oakmead
Parkway, Sunnyvale, CA  94086, USA ("Centaur").

WHEREAS, the parties wish to clarify and amend certain aspects of the above
mentioned agreement (referred to herein as the "Agreement");

NOW THEREFORE, in consideration of the promises and mutual covenants herein
contained, the parties agree as follows:

I.  ADDITIONAL DEFINITIONS/2/

1.   CENTAUR LIBRARY. As used herein "Centaur Library" shall mean all chemical
     structures contained in Centaur's NRT(TM) Technology substance library as
     of June 26, 1995 and additional chemical structures obtained by Centaur
     during the period of time Astra is funding at a rate of not less than U.S.
     $4

_____________________________

/1/

/2/An initial capitalized term appearing in Section I through III, if not
defined in this Section I, shall have the same meaning as in the Development,
License and Marketing Agreement.
<PAGE>
 
     million per year Centaur Research Work and/or Development work under the
     Agreement.

2.  STRUCTURE INFORMATION. As used herein "Structure Information" shall mean any
    and all Confidential Information on the chemical structures of compounds
    included in the Centaur Library including, but not limited to, compound
    descriptors, such as Mass, NMR, IR and UV spectra, melting point, and
    chirality.

3.  SCREENING CRITERIA.  As used herein "Screening Criteria" shall mean compound
    properties specified by the Joint Project Team and approved by the Steering
    Committee as prerequisites for selection of Hits (as defined below).

4.  CD NOMINATION CRITERIA.  As used herein " CD Nomination Criteria" shall mean
    the criteria proposed by the Joint Project Team and approved by the Steering
    Committee for selection of Potential CDs and CDs in the respective Project.

5.  HITS.  As used herein "Hits" shall mean each compound that is identified to
    meet any Screening Criteria in screens performed in a Project during initial
    screening of the Centaur Library.

6.  LEAD COMPOUND.  As used herein "Lead Compound" shall mean a compound
    identified among the Hits as a compound suitable for Lead Optimization, with
    the aim to identify Potential CDs (as defined below) meeting the CD
    Nomination Criteria.
<PAGE>
 
7.  LEAD OPTIMIZATION. As used herein "Lead Optimization" shall mean design
    and/or synthesis of new chemical entities based on a Lead Compound using
    Centaur's SAR program or other technologies for drug discovery and drug
    design in order to find compounds meeting CD Nomination Criteria.

8.  PRIMARY PHARMACOLOGY TESTING. As used herein "Primary Pharmacology Testing"
    shall mean the testing of Lead Compound(s) and/or compounds synthesized
    during Lead Optimization for properties regarding potency and selectivity in
    in vitro and in vivo tests related to the cellular and molecular drug
    target(s) and/or in models of the target disease in a Project.

9.  SECONDARY TESTING. As used herein "Secondary Testing" shall mean the testing
    of Lead Compound(s) and/or compounds synthesized during Lead Optimization
    for properties regarding safety pharmacology, drug metabolism and
    pharmacokinetics, and toxicity in a Project.

10. POTENTIAL CD(S). As used herein "Potential CD(s)" shall mean such Lead
    Compound(s) and/or compounds synthesized during Lead Optimization that after
    Primary Pharmacology Testing and Secondary Testing are identified by the
    Joint Project Team and approved by the Steering Committee to meet the CD
    Nomination Criteria in the relevant Project. Each potential CD, as well as
    each CD, shall include all of such CD's salts, esters which are easily
    cleaved biologically or chemically, complexes, chelates, hydrates,
    stereoisomers, crystalline and amorphous
<PAGE>
 
     forms, prodrugs, metabolites and metabolic precursors.

11.  IDENTIFICATION. As used herein "Identification" means the process in each
     Project leading up to and including selection by the Joint Project Team and
     the Steering Committee of Potential CDs and CDs. Identification includes
     the following phases: 1) initial screening of the Centaur Library for Hits,
     2) identification and selection of Lead Compounds among the Hits, 3) Lead
     Optimization, 4) Primary Pharmacology Testing, 5) Secondary Testing and 6)
     selection of Potential CDs and CDs. In a Project where Identification has
     been completed and the desired number of Potential CDs have been selected,
     Identification may be resumed, in full or in part, should the Potential CDs
     selected later prove inadequate.


II.  IDENTIFICATION AND ACCESS TO STRUCTURE INFORMATION.

1.   OVERVIEW OF PROCESS. In an effort to speed the Identification for the Field
     but at the same time being sensitive to Centaur's need for strictly
     controlling Structure Information, a limited number of Astra employees will
     actively participate with Centaur personnel in the various phases of the
     Identification.

2.   SCREENING OF THE CENTAUR LIBRARY. The number of Astra employees
     participating in each Project in the initial screening of the Centaur
     Library for Hits will be separately agreed by the parties on a
<PAGE>
 
     case by case basis but will always include Astra's Project leader and one
     or more named specialists in chemistry, in modeling and drug design, and in
     QSAR technologies.

     The said Astra employees will either alone, or together with the respective
     Joint Project Teams, be involved in i.a. preparation of proposals to the
     Steering Committee on Screening Criteria, design of the screens, analyzing
     results from the screens and identifying Hits from the screens and
     identifying Lead Compounds.  The Astra employees involved in the initial
     screening of the Centaur Library will be given access to all Structure
     Information on the Hits but not to Structure Information on other compounds
     in the Centaur Library except to the extent that is needed or necessary for
     Identification in a Project as judged by the Joint Project Team and the
     Steering Committee.

     Structure Information on compounds disclosed to Astra employees according
     to the preceding paragraph, and/or on compounds synthesized during the
     process of Lead Optimization may be disclosed within Astra on a need to
     know basis.  Astra undertakes to keep all Astra employees with access to
     Structure Information aware of its strictly confidential nature and that
     the confidentiality obligations undertaken by Astra pursuant to Section 16
     of the Agreement applies to such information.  Astra further undertakes to
     identify to Centaur, on a case to case basis, the names of such Astra
     employees.
<PAGE>
 
3.   NEW CHEMICAL INVENTIONS. Should one or more Astra employees with access to
     Structure Information, solely or jointly with Centaur employees, in the
     process of Identification, make an invention of a new chemical entity or
     new process directly or indirectly on the basis of such Structure
     Information, Astra shall promptly make a written assignment of its rights
     to such new invention to Centaur in a fashion as mutually agreed and, at a
     minimum, compatible with U.S. patent law, and such new invention shall be
     used by Astra and Centaur solely within the context of the Agreement,
     provided, however, that Centaur may use such new invention outside the
     Field subject to the provisions of Section III hereto. Any Astra employee
     who is an inventor as above said shall be named as an inventor in the
     patent application, notwithstanding assignment of Astra's rights thereto to
     Centaur.

4.   DESIGNATION OF A LEAD COMPOUND. The Joint Project Team and the Steering
     Committee may designate one or more Hits as Lead Compound(s). In the event
     of deadlock in the Steering Committee, neither Astra nor Centaur shall have
     the sole right to determine whether a Hit is designated as a Lead Compound.
     If the parties disagree on whether the standards for selection are met,
     then, notwithstanding the provisions of Section 3.4 of the Agreement,
     Article 22 will govern resolution of this dispute. The Steering Committee
     may also rescind its designation of a Hit as a Lead Compound at any time.
<PAGE>
 
5.   DESIGNATION OF A POTENTIAL CD. The Steering Committee may designate one or
     more Lead Compound(s) and/or compounds synthesized during Lead Optimization
     as Potential CDs or CDs, if they meet the CD Nomination Criteria. Within
     each project, and in the Stroke Project within each indication, the parties
     will endeavor to select 3-5 Potential CDs, 1-2 of which will serve as back-
     ups for the chosen CD ("Back-ups"). In the event of deadlock in the
     Steering Committee, Astra shall have the sole right to finally decide on
     all matters regarding selection of CDs and Potential CDs serving as Back-
     ups.


III. CERTAIN RESTRICTIONS ON CENTAUR'S ABILITY TO COMMERCIALIZE A COMPOUND
     OUTSIDE OF THE FIELD.

1.   PROCEDURES RELATING TO POTENTIAL CDS. Should Centaur itself or through a
     third party wish to commercialize a Potential CD serving as Back-up to a
     chosen CD outside of the Field, then it will provide Astra sixty (60) days
     prior written notice that it intends to do so, thereby giving Astra the
     opportunity to declare its with that the Steering Committee designates such
     Potential CD a CD. Should Astra wish the Steering Committee to declare such
     Potential CD a CD, it shall send written notice prior to the end of that
     sixty day period. Should Astra not wish the Steering Committee to declare
     such Potential CD a CD, it will either so inform Centaur in writing, or do
     nothing, and at which point either on such notice or at the end of the
<PAGE>
 
     sixty (60) day period Centaur will remain free to commercialize such
     Potential CD outside of the Field without compliance with Section 18.2 of
     the Agreement and Astra will no longer be able to prevent Centaur from
     commercializing such Potential CD outside of the Field at any time in the
     future.

2.   RESTRICTIONS RELATING TO CDS. When a Potential CD is designated a CD,
     Centaur will not itself or through third party commercialize that CD
     outside of the Field. Notwithstanding any provision of the Agreement,
     Centaur agrees that it will not itself, or through an Affiliate, license or
     exploit a CD for any indication, therapy or use whatsoever inside or
     outside of the Field anywhere in the world other than as provided in
     Section 8 of the Agreement. This provision will become null and void (a) as
     far as applications outside the Field are concerned world-wide, should
     Astra inform Centaur in writing that it no longer will conduct or support
     research, development, use or sale of such CD in the Field or, (b) with
     regard to the relevant country, regarding such CD, if Astra fails to comply
     with Sections 6.4(a), 6.4(b) or 6.5 of the Agreement and Centaur notifies
     Astra of Centaur's intent to terminate the Astra License with regard to the
     relevant country in accordance with Section 6.6 of the Agreement. The
     parties acknowledge that CPI-22 (also named NXY-059) has been declared a CD
     and thus is subject to these restrictions on commercialization by Centaur
     outside of the Field. Should the Steering Committee declare a Potential CD
     a CD, then Astra will pay the amounts, if any, called for by Section 7.2 of
     the Agreement and have
<PAGE>
 
     the concomitant obligations to use best reasonable efforts in pursuing any
     required pre-clinical studies necessary for filing an IND and subsequent
     human clinical trials of the CD and perform other work related to the
     commercial development of the CD as called for in Agreement.

3.   LAPSE OF RESTRICTIONS ON CDS. At such time as Astra no longer wishes to
     continue developing a CD for commercial exploitation or fails to meet the
     standards of performance set out in the Agreement, then Centaur will be
     free to commercialize that CD outside of the Field itself or through a
     third party. Astra shall exert its best reasonable efforts to keep Centaur
     informed of the status of all CDs and the likelihood that Astra may cease
     developing any CD for commercial exploitation in the future in order that
     Centaur may make advance provisions and plans for CDs whose rights may be
     returned to Centaur.

In witness whereof the parties hereto have executed this Amendment in two (2)
copies on the day set forth above.

ASTRA AB                                CENTAUR PHARMACEUTICALS, INC.
(publ)

 /s/ Claes Wilhelmsson                       /s/ Brian D. Frenzel
- -----------------------                     -----------------------
Claes Wilhelmsson                           Brian D. Frenzel
Executive Vice President                    President & Chief Executive
                                            Officer


   /s/ Goran Lerenius
- -----------------------
Goran Lerenius
General Counsel
<PAGE>
 
September 18, 1997

Brian D. Frenzel
President and Chief Executive Officer
Centaur Pharmaceuticals, Inc.
484 Oakmead Parkway
Sunnyvale, CA 94086, USA

Dear Mr. Frenzel:

I refer to your letter of July 18, 1997, in which you request that we waive our 
Right of First Negotiation to applications of Centaur's technology outside the 
central nervous system. After having completed our internal reviews triggered by
your request, I can now inform you that we are willing to agree to your request.

Consequently, we propose that in Article 18.2 of the Development, License and
Marketing Agreement between the parties dated June 26, 1995, in lines 6-8 the
words "Astra's strategic research areas and/or such other research areas of
interest to ASTRA as set forth in Appendix 4 hereof, and as the same may be
                                  ----------
modified from time to time by ASTRA in writing" be replaced by "the research
area of the Central Nervous System (CNS)."

Please confirm your acceptance of the above amendment which will enter into 
immediate effect by your signing and returning to us of the enclosed copy of 
this letter.

Your sincerely,

ASTRA AB
Preclinical Affairs,
Research and Development

                                        We hereby accept and agree to the above
/s/ Jan M. Lundberg                     amendment.
- -------------------
Jan M. Lundberg
Vice President                          CENTAUR PHARMACEUTICALS, INC.
                                        Date: October 7, 1997

                                        /s/ Brian D. Frenzel
                                        -----------------------------
                                        Brian D. Frenzel
                                        President and CEO

<PAGE>
 
                                                                   EXHIBIT 10.16

                                                                31, October 1996

        DEVELOPMENT, PATENT AND TRADEMARK/KNOW-HOW LICENSING AND SUPPLY
                             AGREEMENT - CPI-1189


                                    between



                             H. Lundbeck A/S
                             9 Ottiliavej
                             DK-2500 Copenhagen-Valby
                             Denmark
 
 
 
                                      and
 
 
 
                             Centaur Pharmaceuticals, Inc.
                             484 Oakmead Parkway
                             Sunnyvale, CA 94086
                             United States of America




- --------------------------------------------------------------------------------
[*] - Confidential treatment is being sought with respect to this portion of
      this agreement. This portion has been omitted from this filing and has
      been filed spearately with the Securities and Exchange Commission.

                                                                               1
<PAGE>
 
                                                                31, October 1996

                               TABLE OF CONTENTS


     PREAMBLE

1.   Definitions

2.   Grant of License Rights; Mechanism for Expansion of Territory; Rights
     Relating To a "Back-Up Compound" and to "Additional Compounds"

3.   Competition Clause

4.   Payments and Creditability of Same; Maximum Lundbeck Payments During
     Specified Years

5.   Royalties

6.   Steering Committee; Joint Project Team; Development Plan and Related
     Activities

7.   Manufacturing and Supply

8.   Marketing

9.   Reporting of Adverse Reactions

10.  Confidentiality

11.  Patent Prosecution; Patent and Trademark Infringement; Know-How;
     Proprietary Rights

12.  Liability and Indemnification

13.  Term and Termination

14.  Force Majeure

15.  Warranties and Representations

16.  Resolution of Disputes

17.  Miscellaneous Provisions

18.  Know-How and Information

                                                                               2
<PAGE>
 
                                                                31, October 1996

ANNEXES:

ANNEX A: Patents and Patent Applications
ANNEX B: Development Plan
ANNEX C: Manufacturing Agreement (including tentative quality specifications)

                                                                               3
<PAGE>
 
                                                                31, October 1996

                               LICENSE AGREEMENT


                                    between


                        H. Lundbeck A/S
                        9 Ottiliavej
                        DK-2500 Copenhagen-Valby
                        Denmark
                        (hereinafter "LUNDBECK")
 
 
                                and
 
 
                        Centaur Pharmaceuticals, Inc.
                        484 Oakmead Parkway
                        Sunnyvale, CA 94086
                        United States of America
                        (hereinafter "CENTAUR")
 


WHEREAS, Centaur has invented and developed the chemical compound known under
the name "CPI-1189" and is the owner of certain patent rights in various
European and other countries covering CPI-1189;

WHEREAS, Centaur has developed certain know-how concerning the formulation and
use of pharmaceutical forms of CPI-1189 for Parkinson's disease;

WHEREAS, Lundbeck wishes to obtain from Centaur for the Territory/1/ certain
rights relating to CPI-1189 for Parkinson's disease;

WHEREAS, Centaur and Lundbeck wish jointly to undertake the further development
of CPI-1189 for Parkinson's disease so that data and/or documentation developed
can be used by Lundbeck for governmental approval, marketing and selling in the
Territory, and Centaur can use such data and/or documentation outside the
Territory;

WHEREAS, Centaur is willing to manufacture and supply and Lundbeck may wish to
act as "back-up" supplier of CPI-1189 for the Territory;

NOW, THEREFORE, intending to be legally bound and in consideration of the mutual
promises hereinafter set forth, the parties hereto hereby agree as follows:

______________________________
/1/  Initial capitalized terms are defined below in this Agreement.

                                                                               4
<PAGE>
 
                                                                31, October 1996

1.   DEFINITIONS

For the purposes of this Agreement the following definitions shall apply:

1.1  "Additional Compounds" shall mean any compound, the rights to use for
     Primary Indication are owned or controlled by Centaur and which Centaur
     intends to develop for the Primary Indication. Additional Compounds shall
     include such compounds and all pharmaceutically acceptable salts, esters,
     prodrugs, metabolites, precursors and other such forms thereof for use in
     treating the Primary Indication.

1.2  "Affiliate" shall mean any corporation, firm, partnership or other entity,
     whether de jure or de facto, which directly or indirectly owns, is owned by
     or is under common ownership with a party to this Agreement to the extent
     of at least fifty percent (50%) of the stock or shares entitled to vote for
     the election of directors or at least fifty percent (50%) of the equity (or
     such lesser percentage which is the maximum allowed to be owned by a
     foreign corporation in a particular jurisdiction) having the power to vote
     on or direct the affairs of the entity and any person, firm, partnership,
     corporation or other entity actually controlled by, controlling or under
     common control with a party to this Agreement.  "Centaur" and "Lundbeck"
     shall mean the entities identified in the preamble, together with the
     respective Affiliates of each.

1.3  "Approval for Sale" shall mean that Lundbeck has obtained all necessary
     authorizations including the conclusion of relevant price and reimbursement
     negotiations necessary to obtain the first commercial sale of Licensed
     Products for treatment of Primary Indication in any part of the Territory
     to an Independent Third Party for treatment of human patients.

1.4  "Back-Up Compound" shall mean as defined in Section 2.4.

1.5  "Bulk Product" shall mean finished goods packaged in bulk ready for final
     packaging and labelling as Licensed Product in accordance with Annex C or
     such other material as might be agreed to by the parties.

1.6  "Bulk Substance" shall mean the pure active substance of CPI-1189 delivered
     in suitable containers as agreed by the parties in accordance with Annex C
     or such other material as might be agreed to by the parties.

1.7  "Centaur Technology" shall mean Licensed Patents and Centaur's Know-How.

1.8  "Combination Product" shall mean any finished pharmaceutical product made
     for human therapy containing CPI-1189 as an active ingredient in
     combination with one or more other active ingredients.

1.9  "Confidential Information" shall mean any and all information of or about a
     party including all information relating to any technology, product,
     process or intellectual property of such 

                                                                               5
<PAGE>
 
                                                                31, October 1996

     party only as pertinent to Licensed Product (including, but not limited to,
     owned or licensed intellectual property rights, data, Know-How, samples,
     technical and non-technical material, and specifications) as well as any
     business plan, financial information, or other confidential commercial
     information of or about such other party. Notwithstanding the foregoing,
     specific information shall not be considered "Confidential Information"
     with respect to such party to the extent that the other party possessing
     such information can demonstrate by written record or other suitable
     physical evidence that:

     (a)  such specific information was lawfully in such other party's
          possession or control prior to the time such information was disclosed
          to such other party by the party to whom the information relates;

     (b)  such specific information was developed by such other party
          independently of the Confidential Information of the other party;

     (c)  such specific information was lawfully obtained by such other party
          from a third party under no obligation of confidentiality to the party
          to whom such information relates; or

     (d)  such specific information was at the time it was disclosed or obtained
          by such other party, or thereafter became, publicly known otherwise
          than through a breach by such other party of such other party's
          obligations to the party to whom such information relates, provided,
          however, that disclosure of such information to a regulatory authority
          or governmental body, unless it becomes generally disseminated, will
          not be considered publicly known.

1.10 "CPI-1189" shall mean the chemical compound developed by Centaur known as
     CPI-1189 as well as all pharmaceutically acceptable salts, esters,
     prodrugs, precursors, metabolites and other such forms thereof. (For the
     full and exhaustive description of CPI-1189 reference is made to the letter
     between the parties dated contemporaneously with the Date of Execution.)

1.11 "Date of Execution" shall mean the date of signature to this Agreement by
     the party last to sign.

1.12 "DKK" shall mean the official currency of Denmark, the Danish Kroner.

1.13 "European Union" shall (i) if used as reference to a geographical area mean
     the following countries as they presently exist regardless of whether they
     change form, including without limitation their respective territorial
     possessions at the Date of Execution: Austria, Belgium, Denmark, Finland,
     France, Germany, Greece, Ireland, Italy, Luxembourg, the Netherlands,
     Portugal, Spain, Sweden and the United Kingdom; and (ii) if used as a
     reference to a body or agency having regulatory authority, mean the
     relevant centralized European Union authority as in existence from time to
     time.

1.14 "FDA" shall mean the Food and Drug Administration of the United States of
     America.

                                                                               6
<PAGE>
 
                                                                31, October 1996

1.15 "Force Majeure" shall mean as defined in Section 14.1.

1.16 "IND" shall mean an investigational new drug application filed with the
     FDA.

1.17 "Independent Third Party" with respect to a party hereto shall mean an
     organization or a person that is neither the party nor an Affiliate of a
     party.

1.18 "Know-How" shall mean with respect to either party, collectively, all
     proprietary information, Confidential Information, methods, products,
     ideas, processes, technologies, inventions, data, information and all
     intellectual property rights connected therewith, whether or not patentable
     and whether oral, written or stored in any computer format, owned,
     controlled or licensed to either party, now or during the term of this
     Agreement, to the extent related to the research, development, manufacture,
     use or sale of CPI-1189, Bulk Product, Bulk Substance and/or Licensed
     Product for the Primary Indication in the Territory, explicitly including
     without limitation Synthesis Data, and in the case where licensed to a
     party, where such party has, or may in the future have, the right to
     transfer, disclose and/or grant licenses to the other without violating
     contractual agreements with such third party existing prior or subsequent
     to the Effective Date.

1.19 "Licensed Patents" shall mean any and all present or future patents and
     patent applications in the Territory or covering any part of the Territory
     including a Valid Claim covering CPI-1189 and/or its use as a medicinal
     product for the Primary Indication in whole or in part which are or become
     owned by Centaur, which Centaur has, now or in the future, the right to
     grant licenses to Lundbeck, including the issued patents and patent
     applications listed in Annex A, forming an integral part of this agreement,
     as well as any and all extensions, divisions, continuations, continuations-
     in-part, reexaminations, and reissues thereof in the Territory.

1.20 "Licensed Products" shall mean Products and/or Combination Products.

1.21 "Marketing Quarter" shall mean the three (3) month period commencing on the
     first day of January, April, July and October of each calendar year.

1.22 "Marketing Year" shall mean calendar year periods except for the first
     Marketing Year.  The first Marketing Year shall commence after Registration
     in the first country in the Territory and on the first day of the month in
     which Lundbeck makes its first commercial sale of Licensed Product (that
     is, invoices its first sale of a Licensed Product to an Independent Third
     Party) in the Territory until December 31st of that year.  Subsequent
     Marketing Years shall be the applicable calendar year. The date on which
     the first Marketing Year so commences shall be immediately confirmed by
     Lundbeck to Centaur in writing.

1.23 "NDA" shall mean a new drug application filed with the FDA.

1.24 "Net Sales" shall mean gross sales of Licensed Products invoiced by
     Lundbeck and/or its Affiliates and/or its sublicensees to Independent Third
     Parties in the Territory less (1) the total of ordinary and customary trade
     discounts earned and actually taken or granted, (2) 

                                                                               7
<PAGE>
 
                                                                31, October 1996

     any statutory or contractual rebates paid to any governmental or any other
     public authority, agency or entity (3) cash and quantity discounts allowed,
     (4) allowances and adjustments actually credited or paid to customers for
     spoiled, damaged, outdated and/or returned Licensed Product, (5) freight,
     insurance, transportation costs and handling charges included by the seller
     in its invoices to Independent Third Parties, (6) excise, sales, and value
     added taxes included by the seller in its invoices to Independent Third
     Parties, and (7) customs duties and other compulsory payments made by the
     seller to national, provincial and local government authorities.

     Where (i) Licensed Products are sold as one of a number of items without a
     separate price; or (ii) the consideration for the Licensed Product shall
     include any non-cash element; or (iii) the Licensed Product shall be
     transferred in any manner other than an invoiced sale except for Licensed
     Products transferred as samples or any other similar transfer for
     promotional purposes usually made in the relevant part of the Territory,
     the Net Sales applicable to any such transaction shall be deemed to be
     Lundbeck's average Net Sales for the applicable quantity of Licensed
     Products at that time in the country in which the transaction occurred. If
     there are no independent Net Sales of Licensed Products in the country at
     that time, then Lundbeck and Centaur shall mutually agree on a surrogate
     measurement.

     With respect to a Licensed Product that is a Combination Product, "Net
     Sales" shall mean the "Adjusted Gross Sales" (as defined below) of such
     Combination Product in the Territory less the allowances and adjustments
     listed in items 1 through 7 in the first paragraph of this Section 1.24.
     '"Adjusted Gross Sales" of Combination Products shall mean the gross sales
     multiplied by a fraction, A/(A + B), where "A" shall be the average per
     unit price of Licensed Product as sold alone in that country in the
     Territory and "B" shall be the average per unit selling price in the
     Territory of each pharmaceutically active ingredient in the Combination
     Product other than Licensed Product.  If B is available in the Territory,
     the least expensive presentation shall be used as reference for the
     calculation. The fraction, A/(A+B), shall never be less than one-half
     (1/2). If  sufficient information is not available to make this
     calculation, then Lundbeck and Centaur shall mutually agree on a surrogate
     measurement

1.25 "Plan" shall mean the development plan described in Sections 6.3 and 6.4
     that is attached hereto, and made a part of this Agreement, as Annex B.

1.26 "Primary Indication" shall mean the treatment of Parkinson's Disease (as
     defined in Merck Manual of Geriatrics, 1990, p. 975) and sequelae hereof in
     humans .

1.27 "Product" shall mean any finished pharmaceutical drug for human therapy
     containing CPI-1189 as the sole active ingredient.

1.28 "Registration" shall mean all written governmental approvals excluding any
     price and/or reimbursement approval required for the legal marketing of
     Licensed Product in the Territory (e.g., approval by the United Kingdom
     Medicines Control Agency or by other equivalent government or supranational
     agencies in a the Territory that regulates, licenses or otherwise approves
     the import, manufacture, promotion and/or sale of pharmaceutical 

                                                                               8
<PAGE>
 
                                                                31, October 1996

     products in that country).

1.29 "Standard Manufacturing Price" or "SMP" shall mean as defined in Section
     7.6 below.

1.30 "Steering Committee" shall mean a committee as described in Section 6.1
     below.

1.31 "Substantial Competition" shall mean that a competitor to Lundbeck or a
     Lundbeck Affiliate or a Lundbeck sub-licensee in a given country,
     introduces and markets an identical product to or one which produces the
     same clinical effects using the same molecule as does a Licensed Product
     and such competitor obtains more than twenty percent (20%) of the total
     CPI-1189 market share including the total Combination Product market share,
     as applicable, (calculated by Marketing Year) in that country based upon
     sales revenues denominated in the currency of that country.

1.32 "Synthesis Data" shall mean all present and future data and/or
     documentation  related to the manufacture of CPI-1189 and/or Bulk Product
     and/or Bulk Substance and/or Licensed Product.

1.33 "Territory" shall mean the present geographic locations of all and any of
     the following countries as they presently exist regardless of whether they
     change form, including without limitation their respective territorial
     possessions at the Date of Execution: Austria, Belgium, Denmark, Finland,
     France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Luxembourg, the
     Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, the United
     Kingdom, Albania, Armenia, Azerbajdzjan, Belaruss, Bosnia-Hercegovinia,
     Bulgaria, Croatia, the Czech Republic, Estonia, Georgia, Kazakhastan,
     Kirgizistan, Latvia, Lithuania, Macedonia, Moldovia, Poland, Rumania,
     Russia, Serbia, Slovakia, Slovenia, Tadzhikistand, Turkmenistan, Ukraine,
     Uzbekistand, Yugoslavia and South Africa.  "Territory" may be expanded in
     accordance with the procedures set out in paragraph 2.3 below.

1.34 "Trademark(s)" shall mean any and all trademarks for use in conjunction
     with Licensed Products in any part of the Territory excluding any trademark
     comprising the name of  either party generally used by such party to
     identify itself (a "House-Mark").

1.35 "USD" shall mean the official currency of the United States of America, the
     U.S. dollar.

1.36 "US Registration" shall mean all governmental approvals required for the
     legal marketing of Licensed Product in the United States of America.

1.37 "Valid Claim" shall mean any claim of an issued and unexpired patent which
     has not been held unenforceable, unpatentable, or invalid by a court or
     governmental agency of competent jurisdiction, unappealed or unappealable
     within the time allowed for appeal, nor has been admitted by the holder of
     the patent to be unenforceable, unpatentable, or invalid through reissue,
     disclaimer, or otherwise.

1.38 When any term defined in this Agreement in singular or plural is used in
     this Agreement in plural or singular, respectively, this shall be deemed a
     reference to the defined term unless 

                                                                               9
<PAGE>
 
                                                                31, October 1996

     the context explicitly so indicates.

2.   GRANT OF LICENSE RIGHTS; MECHANISM FOR EXPANSION OF TERRITORY; RIGHTS
     RELATING TO A "BACK-UP COMPOUND" AND TO "ADDITIONAL COMPOUNDS".

     2.1  License Grant to Lundbeck
          -------------------------

     (a)  Patent and Know-How License. Subject to the terms and conditions of
          ---------------------------                                        
          this Agreement, Centaur hereby grants to Lundbeck and Lundbeck hereby
          accepts:

          (i)  Exclusive License. The sole and exclusive, royalty-bearing
               -----------------                                         
               license (the "Exclusive License"), including the right to grant
               sublicenses as provided herein, under the Centaur Technology to
               develop, import, export, package, use, sell, market, promote,
               distribute and have sold Licensed Products for the Primary
               Indication in the Territory in accordance with this Agreement. A
               sublicense includes but is not limited to co-marketing and co-
               promotion arrangements, provided that Centaur is informed of who
               the co-marketing or co-promotion partners are and has no
               reasonable objection to them.

          (ii) Non-Exclusive License. A non-exclusive license (the "Non-
               ---------------------                                   
               Exclusive License"), including the right to grant sublicenses
               under the Centaur Technology to synthesize, formulate and
               manufacture Bulk Product and Bulk Substance for Licensed Product
               for non-clinical, clinical or commercial use and sale for the
               Primary Indication in the Territory  as provided in 7.2 and as a
               "Back-Up Supplier" as  provided in Sections 7.1, 7.18 (b), 7.19,
               7.20 and 7.21 below or in accordance  with Section 13.9 below.

     (b)  Trademark License. Lundbeck and Centaur shall decide as set forth in
          -----------------                                                   
          Section 11.8 on the Trademark(s) under which Licensed Product will be
          marketed, promoted, offered for sale and sold in the Territory, which
          Trademark(s), except for those owned and in use by either party to
          identify itself or its products, shall be owned by Centaur. Subject to
          the terms and conditions of this Agreement, Centaur hereby grants and
          Lundbeck hereby accepts the sole and exclusive, royalty-bearing
          license ("Trademark License"), with right to sublicense, to use the
          Trademark(s) on Licensed Product in the Territory and in accordance
          with Section 5.11. Centaur's  obligations regarding maintenance and
          protection of the Trademark(s) are set forth in Section 11 below.

     (c)  The "Lundbeck License". The Exclusive License, Non-Exclusive License
          ----------------------                                               
          and Trademark License may be herein collectively referred to as the
          "Lundbeck License".

2.2  License Grant to Centaur. Subject to the terms and conditions of this
     -------------------------                                             
     Agreement, Lundbeck hereby grants to Centaur, and Centaur hereby accepts, a
     royalty-free license for the whole world outside the Territory, with the
     power to grant sublicenses under its license, 

                                                                              10
<PAGE>
 
                                                                31, October 1996

     to use any and all Lundbeck owned or controlled Know-how, Confidential
     Information, Synthesis Data and patents for the manufacture, use and sale
     of CPI-1189 and/or Licensed Products as set forth herein. A sublicense
     includes but is not limited to co-marketing and co-promotion arrangements.

2.3  Mechanism for Expansion of Territory.  The scope and definition in Section
     ------------------------------------                                      
     1.33 of the "Territory" may be expanded in the following manner.  Regarding
     Australia, New  Zealand, Egypt, Saudi Arabia, Yemen, Jordan, Lebanon,
     Israel, Turkey, Oman, United Arab Emirates, Kuwait Pakistan and the Gulf
     States, Centaur will give Lundbeck a first right of negotiation, with a
     preference given to Lundbeck over any other party offering substantially
     similar terms and conditions.  Further, if these areas are not part of
     another multi-country transaction or not being serviced by Centaur itself
     before the first NDA filing for a Licensed Product, then these countries
     will be included in the Territory on the same terms and conditions as
     contained in this Agreement by adding the sales of Licensed Products in the
     so included countries to the sales in the Territory when calculating the
     royalties under Section 5, and countries so included shall in all and every
     respect be included in the definition of "Territory" in Section 1.33.

2.4  "Back-Up" Compound and Option for Additional Compounds.
      ----------------------------------------------------- 

     (a)  "Back-Up" Compound.  Should the parties mutually determine in good
          ------------------                                                
          faith that CPI-1189 will be unsuccessful in clinical development for
          the Primary Indication, such determination to be made within sixty
          (60) days after notice to this effect made by either of the parties,
          then Centaur will substitute one Back-Up Compound, which shall be the
          most promising Additional Compound for the Primary Indication as
          mutually agreed by the parties, at no additional cost to Lundbeck.
          Upon such substitution, all rights to CPI-1189 will revert to Centaur
          and the Back-Up Compound will be considered licensed hereunder as if
          it was CPI-1189 and that every reference to CPI-1189 will be a
          reference to the Back-Up Compound. For the purposes of this Section
          2.4. (a) "unsuccessful" shall mean that CPI-1189 is not
          neuroprotective meaning it is not halting or  significantly delaying
          disease progress in Primary Indication and/or that CPI-1189 has
          unacceptable side effects or for some other reasons determined by the
          parties.

     (b)  Option to License Additional Compounds.  Should Centaur invent and
          --------------------------------------                            
          develop one or more Additional Compounds, for the longer of (i) the
          four (4) year period commencing on the Date of Execution or (ii) the
          date of submission of the first application for Registration in the
          Territory for CPI-1189, Lundbeck shall have the option to license each
          such Additional Compound, it being understood that any Additional
          Compound shall be deemed invented and developed in the said period if
          Centaur initiates plans for an IND for the Additional Compound in such
          period.  Each time Centaur initiates plans for an IND for an
          Additional Compound, Centaur shall notify Lundbeck in writing of
          information concerning chemical, toxicological, pharmacological and
          manufacturing details of such Additional Compound. Lundbeck shall,
          within ninety (90) days of written notification from Centaur, either
          (i) waive its right to exercise the option (with failure to respond in
          writing being deemed a waiver), or (ii) send written notification to
          exercise its option.  Should 

                                                                              11
<PAGE>
 
                                                                31, October 1996

          Lundbeck exercise its option to license an Additional Compound, then
          such Additional Compound will automatically become licensed to
          Lundbeck (as if a new agreement for the Additional Compound had been
          signed) and unless otherwise agreed by the parties such license shall
          be under the same terms and conditions as set forth herein, including
          those for Down-Payments as described in Section 4 and royalties as
          described in Section 5, provided, however, that Lundbeck will not be
          required to pay an additional Annual Fee but rather the period for
          payment of the Annual Fee referred to in Section 4.3 will be extended
          until the date of the first application for Registration in the
          Territory of such Additional Compound, and that the duration of any
          patent covering an Additional Compound shall not extend the payment of
          Basic Royalty for Licensed Product. Should Lundbeck not exercise its
          option, then Centaur shall be free to do what it wishes with that
          Additional Compound, including to enter into negotiations and/or an
          agreement and/or collaboration with another party always provided that
          Lundbeck and Centaur shall comply with the obligations set out in
          Section 3.2 hereof.

     (c)  Option to License Extends to Each Additional Compound.  The exercising
          -----------------------------------------------------                 
          by Lundbeck of its option under subparagraph (b) to license one
          Additional Compound shall not prevent Lundbeck from exercising its
          option to license any other Additional Compound.

     (d)  Third Party Royalties. If Centaur is required to pay an Independant
          ---------------------                                              
          Third Party royalty on an Additional Compound then Lundbeck shall
          reimburse Centaur 50 %  such royalty provided that the amount of such
          royalty does not exceed 50 % of the royalties to be paid to Centaur
          directly.

2.5  Use outside Primary Indication in the Territory. In the Territory, Centaur
     -----------------------------------------------                           
     shall not itself, through an Affiliate or through an Independent Third
     Party apply for registration, market, sell or in any other way
     commercialize in any form or formulation CPI-1189 or an Additional
     Compound, licensed to Lundbeck under section 2.4, for any indication,
     therapy or use whatsoever inside or outside the Primary Indication without
     the prior written approval from Lundbeck, made at Lundbeck's sole
     discretion.

 
3.   COMPETITION CLAUSE

3.1  No rights are granted to Lundbeck by this Agreement except for the
     Territory.  Lundbeck shall refer all orders received for delivery of
     Licensed Product outside the Territory to Centaur.  Centaur shall refer all
     orders received for delivery of Licensed Product within the Territory to
     Lundbeck.

3.2  Lundbeck or any of its sublicensees of Licensed Products shall, for the
     term of this Agreement, refrain from marketing any other product in the
     Territory which is competitive with Licensed Product.  A competitive
     product is a pharmaceutical for human therapy (i) with similar
     pharmacological profile and (ii) with a similar labelled indication and
     (iii) with a similar mechanism(s) of action for Parkinson's disease, it
     being understood that (i), (ii) and (iii) are cumulative. Likewise,
     Centaur, shall refrain from marketing on its own, through an 

                                                                              12
<PAGE>
 
                                                                31, October 1996

     Affiliate or through Independent Third Party license partners any
     competitive product to Licensed Product in the Territory or any Additional
     Compound for one year prior to and two years following the date of
     Registration of Licensed Product in the Territory.

4.   PAYMENTS AND CREDITABILITY OF SAME; MAXIMUM LUNDBECK PAYMENTS DURING
     SPECIFIED YEARS

4.1  Down-Payments.  Lundbeck will pay to Centaur the following amounts (which
     -------------                                                            
     shall not be paid more than once in the event that a Back-Up Compound is
     substituted for CPI-1189) in accordance with this schedule.

     (a)  Upon execution of this Agreement, the sum of [*]; and

     (b)  On the later of (i) within seven (7) days of the date of the Phase I
          Lundbeck Notice after the completion of Phase I studies/2/ (conducted
          under the Plan) in the United States or in any country in the
          Territory, or (ii) January 1, 1998, the sum of [*];and

     (c)  Within seven (7) days of the date of the Phase II Lundbeck Notice
          after the completion of Phase II studies/3/ (conducted under the Plan)
          in the United States or 

_________________________

/2/ At the time that Centaur reasonably determines reasonably uncontested by
Lundbeck that Phase I studies as set forth in the Plan have all been
satisfactorily completed, Centaur will send notice of such completion to
Lundbeck. Upon receipt of that notice, Lundbeck will have 15 days to notify
Centaur in writing whether it intends to continue under the Agreement or
terminate the Agreement (the "Phase I Lundbeck Notice"). Failure of Lundbeck to
give the Phase I Lundbeck Notice will be deemed a decision by Lundbeck to
continue with the Agreement. If Lundbeck determines that it will continue under
the Agreement, it shall make the down-payment specified in 4.1(b). In the event
that Lundbeck decides to terminate the Agreement and such decision to terminate
is after 1997 (termination prior to 1998 is governed by Section 4.4(a)), then
Lundbeck may do so on ninety (90) days prior written notice during which time it
will be obligated to continue making all payments required by this Agreement
except the down-payment described in Sections 4.1 (a) or 4.1(b).

/3/ At the time that Centaur reasonably determines reasonably uncontested by
Lundbeck that Phase II studies as set forth in the Plan have all been
satisfactorily completed, Centaur will send notice of such completion to
Lundbeck. Upon receipt of that notice, Lundbeck will have 15 days to notify
Centaur in writing whether it intends to continue under the Agreement or
terminate the Agreement (the "Phase II Lundbeck Notice"). Failure of Lundbeck to
give the Phase II Lundbeck Notice will be deemed a decision by Lundbeck to
continue with the Agreement. If Lundbeck determines that it will continue under
the Agreement, it shall make the down-payment specified in 4.1(c). In the event
that Lundbeck decides to terminate the Agreement and such decision to terminate
is after 1997 (termination prior to 1998 is governed by Section 4.4(a)), then
Lundbeck may do so on ninety (90) days prior written notice during which time it
will be obligated to continue making all payments required by this Agreement
except the down-payment described in Section 4.1(c).

                                                                              13
<PAGE>
 
                                                                31, October 1996

          in any country in the Territory, the sum of [*]; and

     (d)  Within seven (7) days of the date of submission of the first
          application for Registration in the Territory, the sum of [*]; and

     (e)  Within seven (7) days of Approval for Sale of a Licensed Product in
          the first country in the European Union, the sum of [*].

4.2  Creditability.  [*]
     -------------                                                           

4.3  Annual Fee.  In addition to the payments to be made under Section 4.1
     ----------                                                           
     above, Lundbeck shall pay an annual fee (the "Annual Fee") of [*] during
     the below initial period of this Agreement to assist financially in
     Centaur's development of CPI-1189 and Additional Compounds (which
     development work is limited to in vitro and/or in vivo screening to
     identify Additional Compounds, development of surrogate markers to support
     clinical evaluations and work to determine the mechanism of action of CPI-
     1189; and the Annual Fee shall be Lundbeck's only financial participation
     in all such screening, development and work to so determine the mechanism
     of action of CPI-1189 and all other expenses related hereto shall be borne
     solely by Centaur and shall not be covered by Section 6.5). The Annual Fee
     shall be paid quarterly in arrears in [*] amounts on 1 January, 1 April, 1
     July and 1 October. The first such payment which shall cover the partial
     quarter from the Date of Execution until December 31, 1996 shall be paid on
     1 January 1997 in an amount equal to [*] multiplied by the number of days
     from Date of Execution to year end 1996 and divided by the total number of
     days in the fourth calendar quarter of 1996, and any final payment shall be
     prorated similarly. Such Annual Fee shall be paid until the later of (i)
     the date of the first application for Registration in the Territory for the
     Licensed Product or (ii) the end of the four (4) year period commencing the
     Date of Execution.

4.4  Maximum Lundbeck Payments During Specified Years.
     ------------------------------------------------ 

     (a)  From the Date of Execution through the end of calendar year 1997, the
          aggregate of the signing down-payment (see Section 4.1 (a)), the
          Annual Fee, Lundbeck's cost of pre-clinical, clinical, non-clinical
          and regulatory activities and manufacturing costs paid or, in
          accordance with Section 6.5, internally performed by Lundbeck will not
          exceed [*]. Further, if Lundbeck determines to cancel this
          Agreement at any time during this period, Lundbeck will pay to
          Centaur, the balance between the amount it has already so paid and/or
          performed and [*]

                                                                              14
<PAGE>
 
                                                                31, October 1996

          [*], should any balance remain. Similarly, should the costs of what
          the parties agree to (which is expected to be less than [*] for
          Lundbeck) exceed this [*], Centaur will be responsible for costs in
          excess of [*]. This means that, notwithstanding any other provision of
          this Agreement, if Lundbeck exercises its right to cancel this
          Agreement on ninety (90) days prior written notice in 1996 or 1997, it
          will pay any remaining balance between the amount it has already paid
          to Centaur those years and [*].

     (b)  During calendar year 1998, including the end of Phase I down-payment
          (cf. Section 4.1 (b)) (which will be paid on the later of achievement
          of this milestone or January 1, 1998), the aggregate of the Annual
          Fee, Lundbeck's cost of pre-clinical, clinical, non-clinical and
          regulatory activities and manufacturing costs paid or, in accordance
          with Section 6.5, internally performed by Lundbeck will not exceed
          [*]. Similarly, should the costs of what the parties agree to (which
          is expected to be less than [*] for Lundbeck) exceed this [*], Centaur
          will be responsible for costs in excess of [*]. For purposes of
          computing Lundbeck's maximum payment in 1998, the Down-Payments
          provided for in Sections 4.1(c) through (e) shall be deemed to occur
          after calendar year 1998.

5.   ROYALTIES

5.1  At the end of each Marketing Quarter, Lundbeck shall pay a royalty to
     Centaur for the licenses granted hereunder.  Such royalty shall be based on
     the Net Sales of Licensed Products by Lundbeck, its Affiliates and/or its
     sublicensees in accordance with the following provisions.
 
5.2  The Basic Royalty.  Lundbeck will pay to Centaur a royalty (the "Basic
     -----------------                                                     
     Royalty") based on the total Net Sales of Licensed Product in the Territory
     during each Marketing Year, calculated quarterly on a Marketing Year basis,
     as follows:

          [*] on the first [*] of Net Sales; and
 
          [*] on Net Sales over [*] up to and including [*]; and
 
          [*] on Net Sales over [*] up to and including [*]; and

          [*] on Net Sales over [*] up to and including [*]; and

                                                                              15
<PAGE>
 
                                                                31, October 1996

          [*] on the Net Sales in excess of [*].
 
5.3  Example of Calculation.  For example, if Net Sales in the Territory for a
     ----------------------                                                   
     Marketing Year total [*], the royalty to be paid by Lundbeck shall be [*]
     on the first [*] Net Sales, or [*] plus [*] on Net Sales over [*] up to and
     including [*], or [*] plus [*] on Net Sales over [*] up to and including
     [*], or [*] plus [*] on Net Sales over [*] up to and including [*], or [*]
     plus [*] on Net Sales over [*], or [*] for a total royalty of [*].

5.4  Conversion into DKK and then USD.  Net Sales are to be calculated in local
     --------------------------------                                          
     currencies for each of the countries in the Territory and shall be
     converted into DKK based on the average of the purchase exchange rate for
     currency conversion quoted by the Den Danske Bank on the first Copenhagen
     banking day of the first month of each applicable Marketing Quarter and the
     last Copenhagen banking day of the last month of each applicable Marketing
     Quarter.   If Den Danske Bank has no such exchange rate, the conversion
     shall be made at the average rate as calculated above for such remittances
     by Bank of America, San Francisco, CA, U.S.A.  Prior to being paid to
     Centaur, royalty amounts shall be converted from DKK into U.S. Dollars,
     using the average of the purchase exchange rates for conversion from DKK to
     USD on the first and last banking day of the applicable Marketing Quarter
     as quoted by Den Danske Bank or, if such rate is not available, then a
     quote by Bank of America, San Francisco, CA, U.S.A.

5.5  Lundbeck shall within forty-five (45) days from the last day of each
     Marketing Quarter pay to Centaur the royalties due for that Marketing
     Quarter and provide Centaur with  a statement (the "Royalty Report")
     showing the total Net Sales effected hereunder by Lundbeck during the
     preceding Marketing Quarter in the Territory and all Net Sales shall be
     segmented in each such report according to sales on a country-by-country
     basis, including the rates of exchange used for conversion to DKK from the
     currency in which such sales were made and from DKK to USD.

5.6  Royalty payments due to Centaur hereunder shall be made in United States
     Dollars by wire transfer to the Bank of America or other such bank as
     identified by Centaur.  Bank fees charged by Den Danske Bank will be borne
     by Lundbeck; bank fees charged by Bank of America will be borne by Centaur.

5.7  No multiple royalties shall be payable because a Licensed Product, its
     manufacture, use or sale is or shall be covered by more than one of the
     Licensed Patents licensed under this Agreement.  Should a distributor being
     an Independant Third Party be used to selling Licensed Product for
     Lundbeck's account, royalties will be paid on distributor's Net Sales to
     the end-user.  No royalties shall be payable on sales between Lundbeck, its
     Affiliates or sublicensees or between Lundbeck Affiliates and sublicensees
     unless such sales are for use as opposed to resale by the purchasing party.

5.8  All taxes assessed or imposed against or required to be withheld from all
     payments due 

                                                                              16
<PAGE>
 
                                                                31, October 1996

     Centaur shall be deducted from amounts payable hereunder and shall be paid
     to appropriate fiscal or tax authorities by Lundbeck on behalf of Centaur.
     Tax receipts received by Lundbeck evidencing payment of such taxes shall be
     forwarded promptly to Centaur.

5.9  Royalty Rebate for Substantial Competition.  On a country by country basis,
     ------------------------------------------                
     while the Basic Royalty is being paid, there will be a rebate if in a given
     country Substantial Competition exists, which rebate will be [*] of
     the smoothed royalty rate (SRR).  For the purposes of calculating the SSR
     the Net Sales in countries in which only the Trademark Royalty is being
     paid (see Section 5.10) shall not be included.  During each Marketing Year
     the SRR will be computed by adding the sum of (a) [*] times the total
     Territory Net Sales (excluding Net Sales in countries for which only
     Trademark Royalties are paid) under [*], (b) [*] times the total Territory
     Net Sales (excluding Net Sales in countries for which only Trademark
     Royalties are paid) between [*] and [*], (c) [*] times the total Territory
     Net Sales (excluding Net Sales in countries for which only Trademark
     Royalties are paid) between [*] and [*], (d) [*] times the total Territory
     Net Sales (excluding Net Sales in countries for which only Trademark
     Royalties are paid) between [*] and [*], (e) [*] times the total Territory
     Net Sales (excluding Net Sales in countries for which only Trademark
     Royalties are paid) above [*], and dividing this total sum by the total Net
     Sales in the Territory. [*] of the SRR will be multiplied by the Net Sales
     from the country where Substantial Competition exists and that amount will
     be subtracted from the royalty amount (based upon calculation using the
     Basic Royalty) otherwise due from that country at the end of each Marketing
     Year. The Royalty Rebate shall not affect the Basic Royalty computation.
     For example, applying the figures of Section 5.3, if the SRR is [*] namely
     [*] and if the Net Sales for the same Marketing Year in countries where
     Substantial Competition exists totals [*], then the Royalty Rebate is [*]
     and the total royalty to be paid by Lundbeck for such Marketing Year shall
     be [*].

5.10 Duration of Royalty Payments; Duration of Patent Royalty; Trademark
     -------------------------------------------------------------------
     Royalty; Duration of Trademark Royalty.
     -------------------------------------- 

     (a)  The Basic Royalty Rate will be paid on Net Sales in the Territory,
          subject to subparagraph (b) below, until expiration of the Licensed
          Patents.  The Trademark Royalty will be paid on a country by country
          basis until ten years after the last to expire of the Licensed Patents
          in the Territory.

     (b)  The Basic Royalty (reduced, if appropriate, for Substantial
          Competition rebates under Section 5.9 above and the creditability of
          certain payments under Section 4.2 above) is to be paid until Licensed
          Product is not protected by a patent containing a Valid Claim in a
          country in the European Union, at which point in time, in that country
          and in any other country where a Licensed Patent is not outstanding, a
          royalty will be paid at the Trademark Royalty Rate, which will equal
          [*] of Net Sales.  Further, after this event occurs, in each country
          in the Territory where Licensed Product is no longer protected by a
          Licensed
                                                                              17
<PAGE>
 
                                                                31, October 1996

          Patent containing a Valid Claim, [*].  If patent protection is
          regained through filing of new patents with Valid Claims (i.e., new
          Licensed Patents), the royalty rate will revert to the Basic Royalty
          until expiration of such new patent.

5.11 Paid Up License.  When Lundbeck no longer owes royalties to Centaur,
     ---------------                                                     
     Lundbeck will have either a fully paid up sole and exclusive license to the
     Trademark (but excluding any portion of Centaur's House-Mark), or Centaur
     will transfer free of charge ownership to Lundbeck of the Trademark (but
     excluding any portion of the Trademark which comprises Centaur's House-
     Mark) for that country with Lundbeck as registered owner of the Trademark,
     as determined mutually by Centaur and Lundbeck at that time after
     consultation with their financial advisors in the most tax efficient way
     for both parties.  At the time when Lundbeck either has a sole and
     exclusive license for the Trademark or ownership of same in a country, it
     will be Lundbeck's responsibility to  pay all costs for the maintenance and
     defense of that Trademark.  While Lundbeck is paying the Basic Royalty or
     Trademark Royalty, Centaur will pay all costs for the maintenance and
     defense of the Trademark in that country, provided, however, that if
     Centaur determines that it is not in its financial interest to continue
     paying such maintenance and defense costs, then at Centaur's discretion, it
     may transfer to Lundbeck either a fully paid up exclusive license or
     ownership of the Trademark in the country at which point Lundbeck will no
     longer need to pay the [*] royalty, but will be responsible for all
     maintenance and defense costs in that country.

5.12 Lundbeck Records.  Lundbeck shall keep for a period of five (5) Marketing
     ----------------                                                         
     Years following the year to which such records relate, full, true and
     accurate books of accounts and other records containing all information and
     data which may be necessary to ascertain and verify the royalties payable
     to Centaur hereunder.

5.13 Centaur Audit.  Centaur shall have the right to have such pertinent books
     -------------                                                            
     and records of Lundbeck inspected and examined at all reasonable times for
     the purpose of determining the accuracy of payments made hereunder in
     respect of a Royalty Report which is not more than five (5) years old.
     Such inspection and examination shall be conducted by an independent,
     certified public accountant selected by Centaur and to whom Lundbeck shall
     have no reasonable objection.  Such accountant shall not disclose to
     Centaur any information except for information necessary to verify the
     accuracy of the reports and payments made pursuant to this Agreement.
     Results of such review shall be made available to both parties.  If the
     review reflects an underpayment, Lundbeck shall promptly remit to Centaur
     any amounts due with interest calculated using the simple average of the
     prime rate of interest as quoted by the Bank of America, San Francisco, CA,
     USA on the date originally due and the date of remittance.  If the
     underpayment (excluding said interests) is equal to or greater than five
     percent (5%) of the payments made by Lundbeck to Centaur for such period
     under review, Lundbeck shall pay all costs of such review and audit.


6.   STEERING COMMITTEE; JOINT PROJECT TEAM; DEVELOPMENT PLAN AND RELATED
     ACTIVITIES

                                                                              18
<PAGE>
 
                                                                31, October 1996
 
6.1  The Steering Committee.  Following the Date of Execution, the parties will
     ----------------------                                                    
     form a Steering Committee composed of four individuals, with two
     individuals designated by each of Lundbeck and Centaur, which will set
     policy with regard to the Plan and its implementation.  For example, the
     Steering Committee is authorized to amend or modify the Plan (in writing),
     to establish the budget for its implementation, and to determine the
     overall strategy for development and non-clinical and clinical trial
     efforts and continue until all Registrations for all countries in the
     Territory and in the United States are obtained for Licensed Product.  All
     decisions of the Steering Committee will require the approval of three or
     more members.  The Steering Committee will meet,  either in person or by
     conference telephone call, at least once each calendar quarter.   Should
     meetings be in person, the locations will alternate between one chosen by
     Lundbeck and one chosen by Centaur.  Members of the Steering Committee may
     invite guests to attend meetings, provided, however, that the other party
     has no objection against such guests attending and that the party inviting
     such guests shall obligate such guests to hold all Confidential Information
     and Know-How in confidence at least to the same extent as the party itself
     is obligated to hereunder. The members of the Steering Committee shall be
     medicinally trained professionals with a scientific university degree.

6.2  The Joint Project Team and the Project Leaders.  The Joint Project Team
     ----------------------------------------------                         
     shall be composed of employees from both Lundbeck and Centaur.  The Joint
     Project Team shall consist of project responsible managers and staff, each
     appointed by Lundbeck and Centaur respectively, who shall be responsible to
     the Steering Committee for the day-to-day management of the project and
     implementation of the Plan and any amendments thereto in accordance with
     the policies established by the Steering Committee. Each of the parties
     will further appoint a project leader (the "Project-Leader"), each of whom
     will spend at least half of their time on this project. While as a general
     guideline Lundbeck's Project Leader will have responsibility for clinical
     and non-clinical activities performed by Lundbeck for Licensed Product in
     all countries in the Territory and Centaur's Project Leader will have
     responsibility for Centaur's research and development, Centaur's
     identification of surrogate markers and Centaur's non-clinical and clinical
     activities for Licensed Product in the United States, the ultimate decision
     for the allocation of activities will be made by the Steering Committee.
     The Project Leaders will communicate on an on-going basis and in any event
     no less than an average of once every week either in person or by
     telephone, fax or E-mail.   Meetings of the Joint Project Team will be
     arranged on an as needed basis as determined jointly by the Project
     Leaders, with the location of successive meetings selected first by the
     Lundbeck Project Leader and then by the Centaur Project Leader.  Each party
     may change its Project Leader by thirty (30) days prior written notice to
     the other.

6.3  The Plan.  Centaur and Lundbeck have jointly developed and attached as
     --------                                                              
     Annex B to this Agreement their development plan for the Licensed Product
     (hereinafter the "Plan") and shall jointly prepare the relevant
     documentation for applications for Registration and NDA.  The intent of the
     parties is that the Plan shall set forth all the non-clinical and clinical
     activities and trials to be conducted by the parties specifying the timing
     and finalization of each such study and of the reporting of any such study
     hereunder and all other development activities to be conducted by the
     parties hereto in connection with the 

                                                                              19
<PAGE>
 
                                                                31, October 1996

     development of the Licensed Product for application for Registration and
     NDA. The Plan's aim is to satisfy the requirements of the health
     authorities in the Territory and the FDA in a manner which maximizes
     efficiency and minimizes cost. If the Plan itself does not specify which
     party is to perform a study and/or activity, the Steering Committee shall
     do so.

6.4  Review and, If Necessary, Revision of the Plan.  The Plan will subsequently
     ----------------------------------------------                             
     be discussed by the parties and/or the Steering Committee and with the
     European Agency for the Evaluation of Medicinal Products or the European
     Committee for Proprietary Medicinal Products, in Lundbeck's option, and if
     possible with the FDA.  After such presentation to the said public
     authorities, the Steering Committee shall in good faith discuss and, if so
     agreed, amend the draft Plan in accordance with the directions and
     suggestion made by the said public authorities and such amended Plan shall
     after being approved in writing by Centaur and Lundbeck be regarded as the
     final Plan and shall be considered the replacement Plan and should be
     annexed to this Agreement as Annex B and shall after being so annexed be
     regarded as an integral part of this Agreement.  Should the activities of
     the Plan prove to be inadequate for whatever reason for Lundbeck to obtain
     Registration in the Territory or for Centaur to obtain US-Registration,
     then the Steering Committee shall meet to revise the Plan to accomplish the
     goals as set forth above.

6.5  Division of Costs.  Costs of performance of the activities of the Plan
     -----------------                                                     
     shall be shared equally by Centaur and Lundbeck.   Tasks pursued through an
     Independent Third Party shall first be approved by the Steering Committee.
     In the case of costs incurred internally by Lundbeck or Centaur, the
     parties will first attempt to obtain a third party bid, if available to
     perform that task.  If such a third party bid is not available then
     reimbursement shall be computed as set forth in 6.5.A. below.

A.   Preclinical, Clinical, Non-clinical and Regulatory Costs.  Costs for
     ---------------------------------------------------------           
     Preclinical, Clinical, Non-clinical and Regulatory efforts (including but
     not limited to toxicological activities, formulation development,
     activities to support pivotal efficacy and safety claims in regulatory
     filings) will be shared equally by Lundbeck and Centaur for Registration in
     the United States and such major countries in the European Union as
     identified in Annex B. If the activities contemplated in the Plan show to
     be inadequate to so obtain Registration in the United States and said major
     countries in the European Union, the Steering Committee shall consider and
     decide on the necessary amendments to the Plan and before costs for so
     amended activities may be claimed by either party under this Section 6.5.
     For Lundbeck or Centaur internally incurred Preclinical, Clinical, Non-
     clinical and Regulatory costs, costs will be calculated as either (i) the
     sum of the following, all determined in accordance with U.S. Generally
     Accepted Accounting Principles ("U.S. GAAP"):

     a.   Direct labor costs, including benefits; and

     b.   Direct materials costs, including animals, chemicals, supplies; and

     c.   Bulk Product costs (see definition of Standard Costs); and

     d.   Costs to conduct and monitor Preclinical, Clinical and Non-clinical
          Activities, 

                                                                              20
<PAGE>
 
                                                                31, October 1996

          including but not limited to remuneration to patients, if any, product
          liability insurance, transport charges of drug to test centers,
          housing, food, care and monitoring of patients while at test centers,
          and performance of clinical chemistries and pharmacokinetics; and

     e.   Costs to prepare and present reports to regulatory authorities; and

     f.   Indirect costs associated with conducting, monitoring and reporting on
          Preclinical, Clinical and Non-clinical Activities, including but not
          limited to consulting, travel, education seminars, etc.; and

     g.   A portion of Preclinical, Clinical and Non-clinical Activities
          overhead, including but not limited to animal handing and animal
          facilities costs, facilities, insurance, telephone and utilities costs
          for space used in activities, depreciation, etc. allocated on the
          basis of hours spent on performance of the activities of the Plan by
          the Lundbeck/Centaur personnel working in the project contemplated in
          this Section 6, relative to the total amount of hours spent by all
          research and development personnel, but not considering general or
          administrative personnel, of that party; and

     h.   A portion of administrative costs and other corporate overhead costs
          which reasonably support Preclinical, Clinical and Non-clinical
          Activities and Regulatory activities allocated on the basis of hours
          spent on performance of the activities of the Plan by the
          Lundbeck/Centaur personnel working in the project contemplated in this
          Section 6, relative to the total amount of hours spent by all research
          and development personnel, but not considering general or
          administrative personnel, of that party;

     or alternatively (ii) a party may substitute for the items in Section 6.5 A
     (i) (a), (g) and (h) the following:

j.   Standardized direct labor costs including a portion of Preclinical,
          Clinical and Non-clinical Activities overhead, including but not
          limited to animal handing and animal facilities costs, facilities,
          insurance, telephone and utilities costs for space used in activities,
          depreciation, etc. and a portion of administrative costs and other
          corporate overhead costs which reasonably support Preclinical,
          Clinical and Non-clinical Activities and Regulatory activities all to
          be allocated on the basis of hours spent on performance of the
          activities of the Plan by  the Lundbeck/Centaur personnel working in
          the project contemplated in this Section 6, relative to the total
          amount of hours spent by all research and development personnel, but
          not considering general and administrative personnel, of that party;
          such standardized direct labor costs including overheads shall be
          calculated by using one standard rate for academic personnel and one
          standard rate for non-academic personnel such rates to reflect a fair
          average of such labor costs, including benefits, and said overheads,
          these standard rates to be approved by the other party in advance of
          being applied and to be adjusted in accordance with the relevant labor
          price index as evidenced by the relevant party and approved by the
          other party.

                                                                              21
<PAGE>
 
                                                                31, October 1996

     The parties shall be free to choose which of the mechanisms for calculation
     set forth in (i) and (ii) above it will apply and shall notify the other in
     writing in advance of initiation of the first activity under the Plan, and
     the parties may change to the other mechanism and vice versa for each new
     activity undertaken under the Plan after having notified the other party
     before it initiates this new activity.

B.   Settlement of Expenditures. After the end of each calendar quarter,
     --------------------------                                         
     Lundbeck and Centaur will review the actual expenditures made by each of
     Lundbeck and Centaur in performing the activities of the Plan.  Within
     forty-five (45) days after the end of that quarter, the party whose
     expenditures were greater than the other will pay to the other an amount
     equal to half of that excess.

C.   Records.  Both parties shall keep for a period of five (5) calendar years
     -------                                                                  
     following the year to which such records relate, full, true and accurate
     books of accounts and other records containing all information and data
     which may be necessary to ascertain and verify the expenditures paid or
     defrayed by it under this Section 6.5.

D.   Audit.  The other party shall have the right to have such pertinent books
     -----                                                                    
     and records set out in Section 6.5 C of the other party inspected and
     examined at all reasonable times for the purpose of determining the
     accuracy of any payment made hereunder in respect of such expenditures
     which are not paid and/or defrayed more than five (5) years before the
     request for inspection. Such inspection and examination shall be conducted
     by an independent, certified public accountant selected by the party
     requesting the audit and to whom the other party shall have no reasonable
     objection.  Such accountant shall not disclose to the party requesting the
     audit any information except for information necessary to verify the
     accuracy of the reports and payments made pursuant to this Agreement.
     Results of such review shall be made available to both parties.  If the
     review reflects any wrongful payment, the relevant party shall promptly
     remit to the other party any amounts due with interest calculated using the
     prime rate if interest as quoted by the Bank of America, San Francisco, CA,
     USA on the date of remittance.  If the wrongful payment (excluding said
     interests) is equal to or greater than five percent (5%) of the total costs
     paid or defrayed by either party for such period under review, the party
     not having requested the audit shall pay all costs of such review and
     audit.

E.   Early NDA/Application for Registration. Activities conducted under the Plan
     --------------------------------------                                     
     shall remain covered by this Section 6.5 irrespective of application for
     Registration or an NDA has been filed prior to the relevant activity being
     commenced.

F.   Budget. A party that is to perform an activity under the Plan shall no
     ------                                                                
     later than at the time it presents to the Steering Committee the activity
     for approval for initiation as set forth in Section 6.6 present a budget
     for the expected costs to be incurred in connection with the relevant
     activity, and the Steering Committee shall have authority to approve such
     budget. If such budget is later exceeded by the greater of 10 % of such
     budget or USD 10,000, the party performing the relevant activity shall
     inform the Steering Committee accordingly, and the Steering Committee shall
     authorize such excess, before this may be claimed under this Section 6.5 by
     the party having performed the relevant activity.

                                                                              22
<PAGE>
 
                                                                31, October 1996

6.6  Initiation of Activities.  From the Date of Execution, no activities under
     ------------------------                                                  
     the Plan will be initiated without approval of the protocol by the Steering
     Committee at regularly scheduled meetings of or through written approvals
     of Steering Committee.

6.7  Centaur shall supply Lundbeck with all Synthesis Data and all the clinical
     and non-clinical data pertinent to CPI-1189 and/or Licensed Product useful,
     pertinent or required for regulatory purposes in the Territory for Primary
     Indication available as of Date of Execution free of charge.  Each party
     shall when performing activities under the Plan supply to the other party's
     Project Leader the data developed as a part of the activities under or
     outside the Plan pertinent to Licensed Product  in hard copy and in
     computer format agreed by the Steering Committee.  No party shall deny a
     reasonable request from the other party for such data.

6.8  All activities conducted by Centaur and Lundbeck under the Plan, including
     all activities and trials with Licensed Product, shall be carried out
     according to the Plan and under common and agreed criteria for protocol
     writing, selection of contract research organizations and Good Clinical
     Practice, Good Manufacturing Practice and Good Laboratory Practice
     guidelines as currently applicable in both the Territory and the United
     States of America.  The Steering Committee shall agree mutually to the
     initiation and subsequent monitoring and modification of all activities
     conducted under the Plan.  With regard to CPI-1189 activities Centaur has
     performed prior to the Date of Execution, Centaur will repeat or supplement
     any of those activities rejected by regulatory authorities in the European
     Union countries being a part of the Territory until such activities are
     accepted by the said regulatory authorities or it is not commercially
     practicable to do so, in which latter case Lundbeck may conduct the
     relevant activities for Centaur's account applying Section 6.10 mutatis
     mutandis.

6.9  Lundbeck will prepare the relevant documentation for an application for
     Registration with the health authorities in the parts of the Territory that
     it wishes to pursue its rights granted hereunder and, solely in its own
     name, apply for Registration of Licensed Product in its own name and shall
     remain the sole holder of the Registration in the Territory, subject to
     Section 13.2 below. If one year after Lundbeck has received the first
     Approval for Sale in the European Union, Lundbeck has failed to so apply
     for Registration in any of the countries in the Territory, or, if local
     studies are required or customarily made in any country in the Territory,
     Lundbeck has not within one year after having received the said first
     Approval for Sale initiated such studies and has not within one year after
     completion of such studies applied for Registration in any of such
     countries in the Territory, then that country will be deemed excluded from
     the Territory and all rights to Licensed Product in that country (including
     the right to market) will revert to Centaur.

6.10 The parties shall use best reasonable efforts to conduct the development of
     the Licensed Product in accordance with the activities and timetable set
     forth in the Plan.

     If a party is unable for reasons within its control (for reasons beyond its
     control refer to Section 6.11) to reach a milestone or to initiate, conduct
     or complete a study referred to in the Plan by a date set forth in the
     Plan, the Project Leader of the party not in compliance 

                                                                              23
<PAGE>
 
                                                                31, October 1996

     with the Plan shall without delay inform the other Project Leader hereof.
     The Joint Project Team, or if either party so requests the Steering
     Committee, shall convene to discuss how the problems can be resolved. If
     either the milestone or the study has not been reached or completed or the
     parties have not agreed upon a solution to the problems within six (6)
     months from the date in question, the other party may decide to initiate,
     conduct and/or complete (or have initiated, conducted and/or completed) the
     relevant activity by paying the costs for or internally perform the
     necessary activities under the Plan and by requiring the other party to
     compensate its costs in this connection as assessed in accordance with the
     principles of Section 6.5 hereof applying the following mechanism:

     If Lundbeck is the party not having complied with the Plan as set out in
     this Sub-section, then after having completed the relevant activities
     Centaur may forward a statement setting forth the tasks carried out and a
     supporting invoice on the said costs in the amount that Lundbeck is to pay
     under Section 6.5, which Lundbeck shall pay within thirty (30) days of
     invoice.

     If Centaur is the party not having complied with the Plan as set out in
     this Sub-section, then after having completed the relevant activities
     Lundbeck may forward a statement setting forth the tasks carried out and a
     supporting invoice on the said costs that Centaur is to pay under Section
     6.5, and Centaur shall have the option either (i) to pay this invoice
     within thirty (30) days, or (ii) to request within the same period Lundbeck
     to apply this invoice with accrued interests (applying the interest rate
     set forth in Section 5.13) in any following payment to Centaur hereunder
     under Section 4 and/or 5 until the invoice and the interests are recovered
     in full by Lundbeck through the reduced payments.

     This right to claim compensation as provided for in this Sub-section shall
     be the sole and exclusive remedy for such failure to reach a milestone or
     initiate, conduct and/or complete a study.

6.11 In the event a party is unable due to Force Majeure, to reach a milestone
     or complete a study set forth in the Plan, the parties shall meet and
     discuss why the milestone or the study has not been reached or completed
     and will agree as to the actions to be taken to obtain Registration in the
     Territory or US Registration as quickly as possible.

6.12 Procedure For Presentation of Study Documentation. All non-clinical and
     -------------------------------------------------                      
     clinical studies and reports on such activities to be conducted under the
     Plan shall be discussed and closely liaised between the two Project
     Leaders, before being initiated by either party as set forth in the Plan.
     This shall include that the party that is to perform an activity under the
     Plan through its Project Leader shall send to the other party the study
     protocol and the first draft study report respectively and allow the other
     party's Project Leader to comment on each protocol and report.

6.13 Information On Development Status. Both parties shall quarterly and within
     ---------------------------------                                         
     15 days of the other party's reasonable request, advise the other party in
     writing of the status of their work under the Plan and any activity
     conducted under Section 6.14. Furthermore, they shall immediately upon
     request send the requesting party copies of all written material prepared
     according to the obligations hereunder, including but not limited to
     
                                                                              24
<PAGE>
 
                                                                31, October 1996

     correspondence and minutes of meetings with any public health authorities.

6.14 Activities Outside Plan. All non-clinical or clinical activities relating
     -----------------------                                                  
     to CPI-1189 and/or Licensed Products outside the Plan, which are performed
     by either party, their Affiliates or Independent Third Parties anywhere in
     the world before Registration in the Territory, shall be disclosed and
     discussed between the parties or by the Steering Committee and approved,
     such approval not to be unreasonably withheld or delayed, by the parties
     before initiated by either party provided the other party or the Steering
     Committee forwards its comments and decision on approval within one (1)
     month of receipt of the protocol.  If an approval is not received by such
     one (1) month deadline, it is acknowledged that the other party consents to
     initiation of the study.  On all non-clinical and clinical activities both
     parties shall send the other party a first draft report and allow the other
     party to comment on each report, provided that such comments are submitted
     to issuing party within one (1) month from receipt of such draft report by
     the Receiving Party and all of the Receiving Party's reasonable comments
     shall be included in the final report.

6.15 All costs and/or expenses arising or incurred in connection with
     preparation and filing of the application for Registration in the Territory
     and maintenance of Lundbeck's Registration in the Territory shall be borne
     by Lundbeck, unless Centaur has expressly agreed to the costs or  that
     Centaur is not otherwise to bear under this Agreement., and similarly
     Centaur shall bear all costs and/or expenses in connection with the
     preparation and filing of the application for US Registration or medical
     registration worldwide that Lundbeck is not otherwise to bear under this
     Agreement.

6.16 Neither Centaur nor Lundbeck warrants that Registration of the Licensed
     Product will be obtained in or outside the Territory.

6.17 Should Centaur license CPI-1189 to another party outside of the Territory,
     and that other party determines that non-clinical or clinical activities
     are necessary for regulatory approval in its territory, Centaur will
     provide in the license that it (Centaur) will at a minimum be able to
     review, comment on and reject those non-clinical and clinical trials.
     Centaur will provide an opportunity for Lundbeck to review and comment on
     those non-clinical and clinical trials as follows.  Centaur will inform
     Lundbeck of the non-clinical and clinical activities being conducted by its
     licensee and describe those trials.  Lundbeck will have fifteen days (15)
     after having received the information reasonably necessary for evaluation
     to provide Centaur with its comments in writing.  If Lundbeck fails to
     provide such written comments within that fifteen day (15) period, it will
     be assumed that it has no comments.  If Lundbeck has comments, Centaur will
     incorporate them into its comments to its licensee.  In no event shall
     Lundbeck initiate any contact with Centaur's licensee in connection with
     its review and comment on such non-clinical and clinical trials.  All
     information given by Centaur to Lundbeck relating to the activities of its
     licensee will be deemed Confidential Information.

6.18 Dispute Resolution.  If a disagreement arises between the Project Leaders,
     ------------------                                                        
     it shall be referred to the Steering Committee for resolution.
     Disagreements, if any, which may arise between the respective parties'
     representatives in the Steering Committee shall be amicably resolved
     whenever possible.  In the event the Steering Committee is deadlocked, 

                                                                              25
<PAGE>
 
                                                                31, October 1996

     the matter shall be referred to the President of each of Centaur and
     Lundbeck for resolution who must either resolve or determine how to resolve
     the situation or if necessary the overall relationship. Other disputes will
     be resolved in accordance with Section 16 below.

6.19 Centaur Development Partner in Japan. Should Centaur determine to contract
     ------------------------------------                                      
     with an Independent Third Party as a development partner for Licensed
     Products for registration, promotion or sales in Japan (as opposed to
     contracting with an Independent Third Party to merely distribute Licensed
     Product in Japan not to conduct non-clinical or clinical activities), then
     Centaur will consult with Lundbeck and take into consideration Lundbeck's
     views regarding that Independent Third Party and its capabilities, such
     Independent Third Party to be a leading pharmaceutical company experienced
     in international pharmaceutical development. Lundbeck will be free to
     suggest alternative Independent Third Parties to Centaur. Centaur shall
     consider and take in to due consideration Lundbeck's views prior to making
     a final decision regarding with which company to contract with emphasis on
     the objective that such Independent Third Party shall conduct development
     activities and establish adverse event reporting systems that will be
     consistent with those set out in this Agreement.


7.   MANUFACTURING AND SUPPLY

7.1  Overview. The parties will on a regular basis coordinate and exchange
     --------                                                             
     information related to producing Bulk Product and Bulk Substance.  Lundbeck
     and Centaur will communicate and collaborate with regard to manufacturing
     processes and costs.  Lundbeck may audit Centaur's manufacturing facility
     from a financial and manufacturing perspective, and will be given the
     opportunity to provide comments and suggestions to Centaur to improve
     efficiency and reduce the cost of the Bulk Product and, if Lundbeck
     manufactures, vice versa.  Regardless, Centaur will be responsible for the
     quality of the Bulk Product it produces.

     Centaur will unless otherwise agreed supply the Bulk Product and/or Bulk
     Substance for galenic (experimental), non-clinical and clinical for its own
     use and will supply the Bulk Product for commercial use (including without
     limitation use for promotional purposes) meeting quality standards as set
     forth below. "Bulk Product for commercial use" shall when used in this
     Section 7 mean all Bulk Product which is used by Lundbeck in Licensed
     Products that are transferred to an Independent Third Party such transfer
     being a part of the Net Sales. Centaur, in consultation with and with the
     approval of Lundbeck shall establish a back-up supplier for the Territory
     for supplies of Bulk Product for commercial use, which back-up supplier may
     also serve as a back-up supplier for outside of the Territory. Should the
     parties not be able to agree on a back-up supplier, then, until they do so,
     if at all, Lundbeck will serve as back-up supplier for the Territory.
     Additionally, even if the parties agree on a back-up supplier, Lundbeck
     may, by providing eighteen (18) months prior written notice to Centaur,
     become the back-up supplier of Bulk Product for commercial use for the
     Territory. Should Lundbeck become back-up supplier for the Territory, it
     will provide up to 10% (the exact amount to be coordinated by the parties,
     with sensitivity to Lundbeck's production scheduling) of the requirements
     of Bulk Product for

                                                                              26
<PAGE>
 
                                                                31, October 1996

     commercial use for the Territory.

     Lundbeck will supply Bulk Substance and/or Bulk Product for its own galenic
     (experimental), non-clinical and clinical use except for the initial period
     of this Agreement until Lundbeck is capable of manufacturing Bulk Substance
     and/or Bulk Product during which initial period Centaur will supply
     Lundbeck Bulk Substance and/or Bulk Product as required to duly initiate
     and conduct the activities under the Plan. Lundbeck will prepare the
     necessary documentation for deliveries of Bulk Substance and/or Bulk
     Product according to European Union and FDA requirements for experimental
     use. In addition, Lundbeck will prepare documentation for full scale
     commercial manufacturing in the Territory. Should the other party so
     request due to insufficiency of its own such supplies and if agreed to by
     the other party, the parties will supply each other with amounts of Bulk
     Substance and/or Bulk Product for development purposes.

7.2  Non-Clinical and Clinical Supply. Centaur undertakes to manufacture and
     --------------------------------                                       
     supply Bulk Product and/or Bulk Substance for Lundbeck's initial galenic
     (experimental), non-clinical use, which shall include supplies in the
     amounts and at the times stipulated and contemplated in the Plan and Annex
     B until Lundbeck is itself ready to supply its own needs which is expected
     mid-1997. Subsequent to this initial period, Lundbeck undertakes to
     manufacture or have manufactured and supply Bulk Product and/or Bulk
     Substance for its own galenic (experimental), non-clinical and clinical
     use. Both parties shall continuously after mid-1997 use their reasonable
     efforts to supply to the other party amounts of Bulk Product and/or Bulk
     Substance for the  galenic (experimental), non-clinical and clinical use
     should the other party so request due to insufficiency of its own such
     supplies. For supplies under this Section 7.2 the supplied party shall pay
     the SMP as set out in Section 7.6, without Lundbeck paying the fifty
     percent (50%) set forth in Section 7.19.

7.3  Drug Master Files. Lundbeck and Centaur will in parallel and in close
     -----------------                                                    
     cooperation prepare and regularly update (i) drug master files regarding
     manufacturing processes (known as "DMF 2") and regarding facilities (known
     as "DMF 1") for Bulk Substance for development purposes to be filed with
     and to comply with both standards directed by FDA and regulatory
     authorities in the Territory (the "DMF's"), and (ii) chemical
     manufacturing control (known as "CMC")-documentation, including but not
     limited to documentation on formulation of tablets being Licensed Products,
     to be filed with and to comply with the standards of the regulatory
     authorities in the Territory (the "CMC-documentation"). The DMF's and the
     CMC-documentation shall be made available to the other party within a
     reasonable time after such is available and upon the reasonable request by
     the other part. The DMF's and the CMC-documentation shall be regarded as
     part of Synthesis Data and shall be made available at no additional charge
     to the other party other than that the costs for preparing these files
     shall be included by the parties in the costs recoverable in accordance
     with Section 6.5.

7.4  Supply of Commercial Bulk Product.  Centaur undertakes to manufacture or
     ---------------------------------                                       
     have manufactured and supply Bulk Product to Lundbeck for commercial use in
     Licensed Product, and Lundbeck undertakes to purchase from Centaur all Bulk
     Product needed by Lundbeck for commercial use in Licensed Product to be
     sold throughout the Territory subject to Lundbeck's right to produce Bulk
     Product as set forth in this Section 7.

                                                                              27
<PAGE>
 
                                                                31, October 1996

7.5  Regulatory Clearance.
     -------------------- 

A.   Centaur to Secure Regulatory Approvals.  Centaur will use its best
     --------------------------------------                            
     reasonable efforts to obtain all regulatory approvals necessary for the
     manufacture or supply of Bulk Product for Licensed Products in the
     Territory, which shall be obtained in due time to avoid any delay in
     Lundbeck's launch and marketing of Licensed Products as reasonably notified
     by Lundbeck, and  Centaur shall promptly provide Lundbeck with such
     information regarding the manufacture and quality control of Bulk Product
     for Licensed Products necessary to permit Lundbeck to seek marketing
     approval of Licensed Products in the Territory. The undertaking by Centaur
     shall include, without limitation, the following within the said 
     time-limit:

     (a)  Manufacturing Approval.  Centaur will prepare a Plant Master File for
          ----------------------                                               
          Bulk Product containing all relevant Synthesis Data (collectively the
          "Documentation") in accordance with the requirements as applicable at
          any time of relevant regulatory authorities in the Territory and the
          United States.

     (b)  Right of Reference.  Centaur will provide to all regulatory
          ------------------                                         
          authorities in the Territory and/or to Lundbeck (i) on filing of its
          Plant Master File, and thereafter for new filings, (ii) at the time of
          submission of an NDA, any statement or other document necessary or
          appropriate to permit and authorize Lundbeck or Lundbeck's
          sublicensees or Affiliates to cross-reference Centaur's Drug Master
          File or Plant Master File when and as deemed necessary by Lundbeck for
          regulatory authorities in the Territory.

     (c)  Good Manufacturing Practices And Quality Requirements.  Centaur will
          -----------------------------------------------------               
          undertake such steps to achieve, with respect to Bulk Product,
          manufacturing compliance with "Good Manufacturing Practices"
          guidelines as in effect in any part of the Territory from time to time
          during this Agreement. The parties shall no later than six (6) months
          before the first firm order as set forth in Section 7.10 is
          anticipated by Lundbeck to be placed by it execute an agreement which
          is on all material terms substantially identical with Annex C hereto,
          which Annex C shall be amended to properly reflect the revised
          specifications of Licensed Product.

     (d)  Regulatory Inspection.  Should any national, supra-national or
          ---------------------                                         
          international regulatory authority give notice of intent to conduct an
          inspection at Centaur's manufacturing plant or the plant of any sub-
          contractor of Centaur or take any other regulatory action with respect
          to the manufacture and supply of Bulk Product, Centaur will promptly
          give Lundbeck notice thereof, supply all information pertinent thereto
          and grant access to such authorities as required.

     (e)  Contact With Regulatory Authorities.  Centaur will be responsible for
          -----------------------------------                                  
          all contacts with the regulatory authorities with respect to the
          Documentation after it has been submitted to the relevant authority
          and will continuously keep the Documentation updated (with copies to
          Lundbeck) with respect to developments and changes in production
          methods, quality, specifications or in other respects of Bulk Product,

                                                                              28
<PAGE>
 
                                                                31, October 1996

          provided that such changes shall be made only to the extent this is
          consistent with this Agreement, including without limitation Annex C.

     (f)  Regulatory Approval - Licensed Product.  Centaur will use its best
          --------------------------------------                            
          reasonable efforts to assist Lundbeck in providing to regulatory
          authorities all information with respect to the manufacture or quality
          control of Bulk Product necessary for regulatory approval of Licensed
          Products in the Territory.

     (g)  Reference Standard.  Centaur shall provide Lundbeck from time to time
          ------------------                                                   
          with reasonable quantities of Bulk Product of reference standard
          quality for analytical purposes free of charge.

     (h)  Centaur To Inform Lundbeck.  With respect to Centaur's undertakings
          --------------------------                                         
          set forth in this Section 7.5, Centaur shall regularly inform Lundbeck
          of the status of such undertakings including, without limitation, the
          preparation and progress of Documentation.

B.   Collaborative Effort.  Lundbeck and Centaur will collaborate closely and
     --------------------                                                    
     regularly with each other in the performance of their respective
     undertakings pursuant to Section 7.2, 7.3, 7.4 and 7.5 and shall provide
     documents in their possession which would assist the other party with
     respect to such obligations. The Steering Committee may decide to engage in
     these collaborative efforts in furtherance of an optimal solution to
     questions emerging.

C.   Where Lundbeck Manufactures.  As provided for above if Lundbeck makes
     ---------------------------                                          
     clinical supplies to Centaur and for below if Lundbeck is the "back-up
     supplier" in accordance with Sections 7.1, 7.19 7.20, 7.21 and 13.9, it
     will manufacture a portion of the Bulk Product necessary to serve the
     market in the Territory.  To the extent that Lundbeck is explicitly
     required to perform any of the activities described in this Section 7, then
     its obligations will be the same as the obligations of Centaur as described
     above, and Lundbeck will similarly be required to keep Centaur informed,
     all as if the word "Lundbeck" were substituted for "Centaur" and vice versa
     in the provisions above.

7.6  Price of Bulk Product.  Lundbeck will after Registration purchase all
     ---------------------                                                
     (subject to Lundbeck's own production described in this Section 7) Bulk
     Product, at the Standard Manufacturing Price ("SMP"). The SMP shall equal
     [*] of Standard Costs, which includes costs of production, quality control,
     quality assurance, handling, shipping and warehousing. Standard Costs shall
     equal the sum of A through E below:

     A.   Active and inactive raw materials and Bulk Products at purchase price
     B.   Finishing supplies at purchase price
     C.   Full direct labor costs including benefits costs
     D.   Variable overheads (variable overheads include the expenses generated
          within a production department such as wages and benefits of indirect
          labor, indirect operating supplies, etc.)
     E.   Fixed overheads (fixed overheads include those expenses necessary to
          run a particular manufacturing site (e.g. plant administration, taxes,
          insurance, 

                                                                              29
<PAGE>
 
                                                                31, October 1996

          depreciation, repairs and maintenance) and are allocated to product
          based on its share of total direct labor hours, machine hours, cycle
          time and/or volume of end product)

     Provided, however, that in calculating Standard Costs, the sum of items D
     and E shall not exceed [*] of the sum of items A, B and C.

     If Centaur sources Bulk Product  from a third party, the price charged to
     Lundbeck for such Bulk Product will be as if the Bulk Product was
     manufactured by Centaur, i.e., the SMP, using Centaur's average Standard
     Costs for the last three deliveries of Bulk Product of Centaur origin to
     Lundbeck.

     If Centaur sources Bulk Product from a third party without having sourced
     Bulk Product itself for the preceding twelve (12) months before the date of
     relevant delivery to Lundbeck hereunder, the price charged to Lundbeck for
     such Bulk Product will be the actual price charged to Centaur by the second
     supplier for the Bulk Product in question plus [*] always provided that the
     price so charged by the second supplier does not exceed the price otherwise
     charged to Centaur by the same supplier for other similar supplies as per
     Centaur's written evidence should Lundbeck so request.

     Should Centaur ever purchase Bulk Product or Bulk Substance whether for
     non-commercial or commercial use and/or finished Licensed Product from
     Lundbeck, it shall pay to Lundbeck Lundbeck's SMP price as calculated
     above.

7.7  Use of U.S. Generally Accepted Accounting Principles ("U.S. GAAP), Records
     --------------------------------------------------------------------------
     and Audit.
     --------- 

A    U.S. GAAP. U.S. GAAP will be used in determining the components items A
     ---------                                                              
     through E in Section 7.6.  The parties will have their accounting personnel
     communicate and coordinate to avoid any uncertainty and differences in
     understanding.

B.   Records.  Both parties shall keep for a period of five (5) calendar years
     --------                                                                 
     following the year to which such records relate, full, true and accurate
     books of accounts and other records containing all information and data
     which may be necessary to ascertain and verify the SMP calculated under
     Section 7.6.

C.   Audit.  The other party shall have the right to have such pertinent books
     -----                                                                    
     and records set out in Section 7.7 B of the other party inspected and
     examined at all reasonable times for the purpose of determining the
     accuracy of any payment made hereunder in respect of the SMP which are not
     charged more than three (3) years before the request for inspection. Such
     inspection and examination shall be conducted by an independent, certified
     public accountant selected by the party requesting the audit and to whom
     the other party shall have no reasonable objection.  Such accountant shall
     not disclose to the party requesting the audit any information except for
     information necessary to verify the accuracy of the reports and payments
     made pursuant to this Agreement.  Results of such review shall be made
     available to both parties.  If the review reflects any wrongful payment,
     the relevant party shall promptly remit to the other party any amounts due
     with interest calculated using the simple average of the prime rate if
     interest as quoted by the Bank of America, San 

                                                                              30
<PAGE>
 
                                                                31, October 1996

     Francisco, CA, USA on the date of the amount being originally due and the
     date of remittance. If the wrongful payment (excluding said interests) is
     equal to or greater than five percent (5%) of the total costs paid or
     defrayed by either party for such period under review, the party not having
     requested the audit shall pay all costs of such review and audit.

7.8  Minimizing Manufacturing Costs.  Centaur shall use its best reasonable
     ------------------------------                                        
     efforts at all times to minimize Standard Cost while maintaining acceptable
     quality standards.  If Lundbeck allege that Centaur's Standard Costs are
     too high, Centaur will have the burden of proving that its Standard Costs
     are not too high.

7.9  Forecast.  Lundbeck will, before each January 1, April 1, July 1 and
     --------                                                            
     October 1, present to Centaur a written non-binding forecast estimating the
     quantities of Bulk Product to be delivered during each of the next fifteen
     (15) months.

7.10 Firm Orders.  Lundbeck will place firm orders for delivery not less than
     -----------                                                             
     ninety (90) days prior to the required shipment date, and Centaur will be
     obliged to deliver all ordered Bulk Product by the delivery date stated in
     the order, except to the extent that such supply would exceed the latest
     non-binding forecast given by more than twenty percent (20%) for the month
     in question.

7.11 Delivery Terms.  Each delivery of Bulk Product will be effected Ex Works
     --------------                                                          
     Centaur's plant, in accordance with Incoterms 1990, as published by the
     International Chamber of Commerce.  All quantities of Bulk Product will be
     delivered suitably packed for transportation. If so requested by Lundbeck,
     Centaur will act as Lundbeck's agent free of charge, except that such
     expenses may be included in the calculation of SMP, to make arrangements
     based upon Lundbeck's instructions for shipping and to prepare export
     documentation for the Bulk Product to such destination as Lundbeck may
     specify.  Lundbeck will be responsible for all other arrangements including
     payment for shipping and customs at destination.

7.12 Payment for Bulk Product.  Prior to the beginning of any calendar quarter
     ------------------------                                                 
     (starting on  January 1, April 1, July 1 and October 1) Lundbeck will
     estimate the amount of Bulk Product that Lundbeck will purchase from
     Centaur and Lundbeck will pay to Centaur in advance (using the definitions
     in Section 7.6) and forecast actual costs for that quarter.  After that
     quarter ends, Lundbeck and Centaur will review the actual amount Lundbeck
     purchased and Centaur's actual costs within forty-five (45) days of the end
     of that quarter, should Lundbeck's advance payment have been greater than
     the SMP of the actual amount it purchased, Centaur will refund to Lundbeck
     the difference, or should Lundbeck's advance payment have been less than
     the SMP of the actual amount it purchased, Lundbeck will pay to Centaur the
     difference.

7.13 Lundbeck Improvements to Know-How.  In the event that Lundbeck develops
     ---------------------------------                                      
     improvements to Know-How and/or Synthesis Data, such improvements will be
     shared cost free with Centaur, which shall be free to use said improvements
     in its own manufacture of Bulk Product or Bulk Substance, unless Lundbeck
     can establish that such improvements can be used independent from Centaur
     Know-How and/or Synthesis Data

                                                                              31
<PAGE>
 
                                                                31, October 1996

     and, if so, the parties shall, if Centaur so wishes, in good faith
     negoatiate terms for a license to Centaur of such improvements. If Centaur
     and Lundbeck jointly develop patents relating to the manufacturing of Bulk
     Product and/or Bulk Substance and/or Licensed Products, those patents will
     be jointly owned and Lundbeck will not be required to pay any royalties for
     their use.

7.14 Notification of Events Concerning Supply. Centaur shall continuously at any
     ----------------------------------------                                   
     time unless having declared Force Majeure under Section 14 after the
     Registration of the first formulation of Licensed Product has been obtained
     in the Territory and for the term of this Section 7 hold a buffer of Bulk
     Product equivalent to not less than fifty (50) days average delivery to
     Lundbeck based on the deliveries in the last six (6) months. Centaur will
     promptly notify Lundbeck of any circumstances that may be of importance as
     to Centaur's ability to supply Lundbeck with Bulk Product.  In the event
     Lundbeck should commence manufacture of Bulk Product as provided herein,
     Centaur will support Lundbeck in setting up a well functioning production,
     e.g., by furnishing Lundbeck with information, know-how, Synthesis Data and
     advice regarding processing and choice of machinery, equipment etc.

7.15 Lundbeck Inspection.  Within thirty (30) days following receipt of each
     -------------------                                                    
     shipment and before Bulk Product is put into further production, whichever
     is first to occur, Lundbeck shall carry out customary tests and inspections
     as required by the regulatory authorities in the Territory.  Should any
     quantity of Bulk Product be found not to conform with the Specifications,
     Centaur shall, at its sole cost, replace the defective quantity without
     delay and no later than thirty (30) days of receipt of Lundbeck's notice to
     this effect, provided that Lundbeck has notified Centaur of such non-
     conformity within sixty (60) days following receipt of the defective
     quantity of Bulk Product.

7.16 Changes in Manufacturing Process.  No changes shall be made in the
     --------------------------------                                  
     processes or specifications used in producing Bulk Product for Licensed
     Product without agreement by both parties.  If such changes are required
     for regulatory reasons, neither party shall unreasonably withhold its
     consent to such changes. The parties shall enter into an Agreement for the
     manufacturing of Bulk Product substantially similar to that attached as
     Annex C.

7.17 Term.  Lundbeck's obligation to purchase Bulk Product for commercial use in
     ----                                                                       
     accordance with this Section 7 shall commence as of the Date of Execution
     and, subject to Section 7.22 below, shall expire on a country by country
     basis in the Territory when there is no patent protection of CPI-1189
     prohibiting an Independent Third Party from the legal or actual
     manufacturing and distribution of Bulk Product in a given country. The
     parties shall in reasonable time before such patent protection expires
     start to re-negotiate delivery terms, with a preference given by Lundbeck
     to Centaur over any other party offering substantially similar terms and
     conditions.

7.18 Back-Up Supplier.
     ---------------- 

     (a)  Appointment.  Centaur, in consultation and collaboration with and with
          -----------                                                           
          the approval of Lundbeck shall establish a back-up supplier for Bulk
          Product for commercial use for the Territory, which back-up supplier
          may also serve as a back-up supplier for 

                                                                              32
<PAGE>
 
                                                                31, October 1996

          outside of the Territory. Centaur shall no later than twenty-four
          months after the Date of Execution suggest to Lundbeck such a back-up
          supplier to which Lundbeck may agree or disagree. If Lundbeck approves
          any such back-up supplier, it shall be consistent with the provisions
          of the manufacturing agreement between Centaur and Lundbeck attached
          as Annex C hereto. These obligations will apply only to a back-up
          supplier who will be producing Bulk Product for the Territory.

     (b)  Failure to Agree on Back-Up Supplier or Uncertainty of Supply. If
          -------------------------------------------------------------    
          Centaur and Lundbeck cannot agree on a back-up supplier within three
          (3) months of Centaur suggesting a back-up supplier to Lundbeck in
          accordance with subparagraph (a) immediately above, then Lundbeck,
          until they do, if at all, shall have the right, but not the obligation
          to manufacture Bulk Product itself as a back-up supplier for the
          Territory and in accordance with Section 7.19 below.  Additionally,
          even if the parties agree on a back-up supplier, Lundbeck may, by
          providing eighteen (18) months prior written notice to Centaur become
          back-up supplier of Bulk Product for the Territory.

     (c)  May Choose Back-Up Supplier At Any Time.  Should Lundbeck become back-
          ---------------------------------------                              
          up supplier for the Territory, the parties may still at any time agree
          another back-up supplier and then, transfer the back-up supply
          obligations from Lundbeck to such other party.

7.19 Lundbeck's Manufacture of Bulk Product.  Should Lundbeck determine to
     --------------------------------------                               
     become a back-up supplier for the Territory in accordance with Section
     7.18, then Lundbeck shall be entitled under Lundbeck's Non-exclusive
     License to manufacture up to ten percent (10%) of Lundbeck's (or Lundbeck's
     Affiliates and sublicensees) total requirement of Bulk Product  for
     commercial use (the exact amount to be coordinated by the parties with
     sensitivity to Lundbeck's production scheduling).  Notwithstanding such
     manufacture by Lundbeck, Lundbeck shall, other than for Bulk Product
     covered by the provisions of Sections 7.2, 7.20 and 13.9(b) pay to Centaur
     with respect to such manufacture, an amount equal to fifty (50) percent of
     Centaur's Standard Costs as if such Bulk Product had been manufactured by
     Centaur.

7.20 Force Majeure - Manufacture.
     --------------------------- 

     (a)  Lundbeck Right to Manufacture.  Centaur will notify Lundbeck as
          -----------------------------                                  
          promptly as at all practicable of any Force Majeure event.  In the
          event Centaur shall, for reasons of Force Majeure (as defined in
          Section 14.1 below but without regard to the time periods stated
          therein), be unable to supply Lundbeck (or Lundbeck's Affiliates or
          sublicensees) with its requirements of Bulk Product for commercial
          use, Lundbeck will be free to manufacture or have manufactured Bulk
          Product to satisfy its requirements and, if Lundbeck in its sole
          discretion determines to do so and if so requested by Centaur,
          Centaur's requirements for Bulk Product as well. Lundbeck will pay to
          Centaur with respect to such manufacture no part of Centaur's Standard
          Costs or SMP.

                                                                              33
<PAGE>
 
                                                                31, October 1996

     (b)  Centaur May Recommence Manufacture; If Centaur Does Not Recommence
          ----------------------------------                                
          Manufacture. Within one hundred twenty days (120) of the first
          occurrence of the Force Majeure event (as defined in Section 14 below
          but without regard to the time periods stated therein), Centaur will
          provide written notice to Lundbeck if it intends to attempt to
          recommence manufacture of Bulk Product.  If Centaur states that it
          will not recommence manufacture, or it is unable to do so within one
          year from the end of this one hundred twenty (120) day period, then
          Lundbeck may continue to manufacture all of its requirements for Bulk
          Product in the Territory.  At any time thereafter, should Centaur be
          able to recommence manufacture of Bulk Product, it may do so upon one
          hundred eighty (180) days prior written notice to Lundbeck and the
          parties will resume their prior obligations to supply and purchase of
          Bulk Product as from the time that supplies are actually recommenced
          using the pricing scheme set out in Section 7.6.  Should Centaur
          recommence manufacture after such one hundred eighty (180) day prior
          written notice and Lundbeck still have in inventory Bulk Product which
          it has not sold, then Centaur will purchase such stocks (inventory) of
          Bulk Product from Lundbeck at a price equal to fifty (50%) of
          Lundbeck's SMP, and Centaur shall have the right to sell and Lundbeck
          shall have the obligation to purchase, any Bulk Product so purchased
          at 100% of Centaur's SMP.

7.21 Discretionary Lundbeck Supply of Centaur.  Should Centaur not be able to
     ----------------------------------------                                
     manufacture Bulk Product for commercial use for any reason, force majeure
     or otherwise it may ask Lundbeck to supply all or part of Centaur's needs
     for Bulk Product but Lundbeck, in its sole discretion, may refuse to do so.
     If Lundbeck agrees to do so the provisions above relating to Lundbeck's
     manufacturing of Bulk Product shall apply.

7.22 Default of Supply Obligation.  Failure by either party to comply with any
     ----------------------------                                             
     of its material obligations contained in this Section 7 concerning
     Manufacturing and Supply following notice and opportunity to cure, as
     hereinafter provided (a "Default") shall not be governed by the provisions
     of Section 13.4 below but rather by this Section 7.22.  The non-defaulting
     party shall give the other party notice specifying the nature of the breach
     of this Section 7 and requiring it to cure such breach.  If such breach is
     not cured within one hundred twenty (120) days after the receipt of such
     notice (or one hundred eighty (180) days in event such breach cannot be
     reasonably expected to be cured within one hundred twenty (120) days), and
     the defaulting party gives notice to the other party of its inability to
     cure such breach within a 120-day period and the defaulting party
     thereafter uses reasonable efforts to cure such breach as soon as
     practicable, but in no event longer than one hundred eighty (180) days),
     the notifying party, if the notifying party is Lundbeck, shall have such
     rights as set forth in Section 13.9 and if the notifying party is Centaur,
     shall be entitled to terminate Lundbeck's rights and/or Centaur's
     obligations (the choice being in Centaur's sole discretion) under this
     Section 7, in either case by giving notice to that effect to the defaulting
     party.  Notwithstanding the foregoing, a party shall not have a right to
     employ these remedies under this Section 7.22 in the event the  other party
     pursuant to Section 16 has sought to resolve the dispute for which the
     remedy  is being sought.


8.   MARKETING

                                                                              34
<PAGE>
 
                                                                31, October 1996

8.1  Lundbeck's Commercialization of Licensed Product.  Lundbeck agrees to use
     ------------------------------------------------                         
     its best reasonable efforts to commercialize Licensed Product in the
     Territory and will keep Centaur continuously informed with respect to such
     commercialization.

8.2  Price and Reimbursement Approval.  Lundbeck shall as promptly as
     --------------------------------                                
     practicable but in no event later than six (6) months from having received
     Registration, or as soon as legally possible, apply for price and
     reimbursement approval in each country in the Territory to the extent that
     price and reimbursement approval is mandatory or commonly obtained in each
     such country.  Lundbeck shall start marketing Licensed Product, on a
     country by country basis in the Territory, as promptly as practicable after
     the date of Registration and, if such is necessary or commonly obtained,
     receipt of price and reimbursement approval, of the Licensed Product in
     each country in the Territory.  If one year after Lundbeck has received
     Approval for Sale in a particular country within the Territory, Lundbeck
     has failed to commence sale in such country, then that country will be
     deemed excluded from the Territory and all rights to Licensed Product in
     that country (including the right to market) will revert to Centaur.

8.3  Product Manager.  Lundbeck shall at the latest one (1) year before it
     ---------------                                                      
     anticipates the start of the first Marketing Year appoint a product manager
     for the Licensed Products who shall have, as one of his/her major
     responsibilities, the marketing of Licensed Products and who shall as of
     the appointment be the focal person for future contacts between Lundbeck
     and Centaur.  Centaur will identify a contact person for this function.
     Either party may replace such product manager or contact by giving thirty
     (30) days prior written notice to the other.

8.4  Marketing Plans.  Lundbeck shall three (3) months at the latest before the
     ---------------                                                           
     start of the first Marketing Year, and thereafter annually for the duration
     of the Agreement on November 30, send to Centaur a copy of its three year
     non-binding marketing plan(s) for the Licensed Product in the Territory.

8.5  Packaging.  Lundbeck shall package the Licensed Product in a package with
     ---------                                                                
     graphics and of a design which are comparable to those used for other
     Lundbeck similar products.  Unless otherwise prohibited by regulatory
     authority, Licensed Product(s) or the packaging in which they are contained
     shall bear the label "Distributed or Manufactured (as appropriate) under
     license from Centaur Pharmaceuticals, Inc., CA, USA", or any similar
     wording as may be mutually agreed upon by the parties.

8.6. Information Regarding Post-Registration Material. Apart from the updating
     ------------------------------------------------                         
     of Know-How, Confidential Information and Synthesis Data, the parties shall
     keep each other reasonably informed about other material concerning
     Licensed Products such as without limitation marketing plans, strategic
     marketing planning  and sales penetration information to be used in the
     United States of America or in the Territory, which each party shall be
     free to communicate to the other party, including but not limited to any
     information which may directly or indirectly affect the marketing success
     of Licensed Products in  the United States of America or in the Territory,
     always provided that the other party directly or through an Affiliate or a
     licensee does not develop and/or market any other drug than Licensed
     Products for the Primary Indication. The parties shall at least six months
     before 

                                                                              35
<PAGE>
 
                                                                31, October 1996

     the anticipated first sale of Licensed Products to an Independent Third
     Party seek to establish mechanisms in furtherance of such exchange of
     information. All material supplied by a party to the other party under this
     provision shall be Confidential Information in the hands of the receiving
     party; however, notwithstanding Section 10 or any other provision of this
     Agreement, both Parties shall be free to communicate to any of its
     Affiliates and/or licensees of Licensed Product Information received by the
     Parties under this provision, provided such Affiliates and licensees are
     under a secrecy obligation which is at least as limiting as Section 10.

8.7  Marketing Costs.  Lundbeck shall pay for all costs related to its marketing
     ---------------                                                            
     and sale of Licensed Products in the Territory.

8.8  Phase IV Trials. The parties shall at least six months before the
     ---------------                                                  
     anticipated first sale of Licensed Products to an Independent Third Party
     seek to establish mechanisms in furtherance of procedures and organisations
     similar to those set forth in Section 6 in order to coordinate performance
     of and collect information relating to Phase IV trials, i.e. trials with
     Licensed Products that are conducted after the first US-Registration or the
     first Registration have been granted subject to such trials are not being
     conducted as a part of the Plan.

9.   REPORTING OF ADVERSE REACTIONS

9.1  General. The parties shall regularly agree to arrangements and revisions
     -------                                                                 
     hereof to secure the proper reporting of adverse drug reactions under any
     legislation that either party's operations with CPI-1189 and/or Licensed
     Products are subject to, and such arrangements shall be designed by taking
     due consideration of the stage reached in the development or marketing. If
     no such arrangements are agreed to, or if arrangements previously agreed to
     are terminated by either party with a notice of one (1) month, then the
     parties shall apply the procedures set forth in Section 9.2-9.9.

9.2  Definitions.  For the purpose of this Article 9, the following definitions
     -----------                                                               
     shall apply:

     (a)  "Adverse Drug Reactions (ADR)" shall mean an undesirable experience
          occurring to a patient treated with Licensed Product, in so far the
          experience may be related to the Licensed Product administered and
          provided that the experience has occurred simultaneously with or after
          the patient has received treatment with the Licensed Product at doses
          recommended for use in humans for the prophylaxis, diagnosis or
          treatment of disease or the modification of physiological function.
 
     (b)  "Serious Adverse Drug Reaction (SADR)" shall mean an ADR, which is
          fatal, life-threatening, disabling, incapacitating or which results in
          or prolongs hospitalization.
 
     (c)  "Unexpected Adverse Drug Reaction (UADR)" shall mean an ADR not listed
          in the data sheet filed with the Health Authorities in the Territory
          by Lundbeck or, if applicable, an affiliate or sublease of Lundbeck
          which sheet contains a product characteristics, including all relevant
          safety information.
 
                                                                              36
<PAGE>
 
                                                                31, October 1996

     (d)  "Serious, Unexpected Adverse Drug Reaction (SUADR)" shall mean an ADR,
          which is both Serious and Unexpected.

9.3  Report.  Within thirty (30) days from any agreed six (6) months period,
     ------                                                                 
     each party shall provide the other party with a written report giving
     relevant information on any ADR having occurred during the preceding six
     (6) month period and of other clinical safety and/or toxicity findings
     related to Licensed Products, which have come to its attention during the
     same period.

9.4  Notice.  Each party shall notify the other party of any SADR, UADR and/or
     ------                                                                   
     SUADR reported to it as having occurred in its territory, within forty-
     eight (48) hours from it becoming known to the relevant party that such an
     event has occurred. All future details relating to the reported SADR, UADR
     and/or SUADR shall be forwarded to the other party after receipt.

9.5  Notice Requirement of Sublicensees.  Centaur and Lundbeck will each ensure
     ----------------------------------                                        
     that its respective licensees and sublicensees are obligated to notify
     promptly its licensor, whether Centaur or Lundbeck, of any ADR, SADR, UADR
     and/or SUADR which has come to said sublicensee's attention. The party who
     has received notification of such event shall inform the other of such
     event promptly.

9.6  Duty to Inform.  Each party will keep the other party informed of any
     --------------                                                       
     action it will take as a consequence of the receipt of such reports, in the
     case of SADR, SUADR and/or increased incidence of ADR and/or UADR,
     destroying the reputation of Licensed Product), recall of Licensed Product,
     etc., which may be anticipated to have an impact on the other party's
     activities hereunder.

9.7  Notification.  Each party shall be liable for notification to the relevant
     ------------                                                              
     health authorities of any kind of ADR, (whether UADR, SADR and/or SUADR)
     reported to it by the other and/or third parties, in compliance with
     national legal requirements in its territory which relates to such
     notification. However, each party undertakes to have any notification
     reviewed and approved by the other party before filing, in order for the
     parties to assure full compliance between the data stated in the
     notification and the parties' central archives. In case the other party can
     not legitimately be informed prior to filing with the relevant health
     authorities due to time constrains, the relevant party shall simultaneously
     with notifying the national authorities, forward to the other party a copy
     of the notification filed, indicating that the relevant health authorities
     have already been informed.

9.8  Pharmacovigilance Guidelines.  The pharmacovigilance guidelines herein
     ----------------------------                                          
     agreed upon, reflect Council Directive 93/39/EEC of June 14, 1993, Chapter
     Va and Council Regulation (EEC) No. 2309/93 of July 22, 1993. However,
     these guidelines shall, inter partes, apply only as a minimum, being
     understood that national pharmacovigilance legislation applicable shall be
     abided by and prevail to the extent such national pharmacovigilance
     legislation is more restrictive than stated herein.

9.9  Additional Reporting.  Clinical findings related to the administration of
     --------------------                                                     
     Licensed Product to pregnant women and/or administered in indications or at
     dosages which have not been 

                                                                              37
<PAGE>
 
                                                                31, October 1996

     approved by the relevant health authorities, in particular overdoses, shall
     be reported without undue delay, i.e. within ten (10) working days from the
     relevant party having recorded the incident, whether or not such
     administration results in an ADR, SADR, UADR and/or SUADR, and thereby
     already has been reported and whether or not the administration took place
     as a part of a clinical trial.

9.10 Information, Data, Reports.  Information, data and reports exchanged
     --------------------------                                          
     hereunder shall be forwarded to the other party for the attention of the
     Drug Surveillance Unit.

9.11 Confidential Treatment.  Information and data exchanged under this Section
     ----------------------                                                    
     9 shall be considered as Confidential Information.

9.12 Right of Inspection.  Each party hereto shall have the right with a notice
     -------------------                                                       
     of one week to inspect and audit the pharmacovigilance facilities, files,
     data, procedures and other pharmacovigilance related matters of the other
     party hereto relating to CPI-1189 and Licensed Product, and without
     prejudice to any other remedy hereunder the parties shall continuously
     jointly discuss the optimizing of all pharmacovigilance related matters.


10.  CONFIDENTIALITY

10.1 Survival.  Confidential Information supplied by one party to the other as a
     --------                                                                   
     result of this Agreement, shall be held in confidence by the receiving
     party until December 31, 2020 or ten (10) years after expiration or
     termination of this Agreement, whichever period is the longer.

10.2 Non-Confidential Information.  This secrecy obligation should not be
     ----------------------------                                        
     considered violated, if and to the extent that Confidential Information:

     (a)  is disclosed to government agencies for the purpose of obtaining
          Approval for Sale or filing or prosecuting patent applications;

     (b)  must be disclosed to those persons who have a need to know in order to
          effectuate the development or, except as regards Synthesis Data,
          marketing of Licensed Product, provided that each such person signs an
          agreement obligating that person to hold the Confidential Information
          and Synthesis Data  (when applicable) in confidence to the same extent
          as the parties hereto, it being understood that for employees of
          either party such obligation may be undertaken in a general
          confidentiality statement towards its employer; or
 
     (c)  are disclosed pursuant to an order or requirement of a court,
          administrative agency or other government body but only, if possible,
          after informing the other party in advance of such disclosing and
          giving such party the opportunity to object and/or obtain satisfactory
          confidential protection.

10.3 Burden of Proof.  A party asserting that its obligation of confidentiality
     ---------------                                                           
     under this Article does not apply  because of an exception to that
     obligation shall have the burden of proving 

                                                                              38
<PAGE>
 
                                                                31, October 1996

     the exception it asserts.

10.4 Confidentiality Agreement.  Confidential Information exchanged under the
     -------------------------                                               
     Confidentiality Agreement between the parties dated August 29, 1995 shall
     be governed by the provisions of this Article and the said Confidentiality
     Agreement will remain in force only to the extent consistent with the
     obligations stated in this Section 10 (in the event of any inconsistency,
     this Section 10 shall govern).

10.5 Supply of Confidential Information.  Confidential Information supplied by a
     ----------------------------------                                         
     party to the other shall remain the property of the supplying party.  Each
     party shall supply Confidential Information to the other to the extent it
     is necessary for the other to fulfil its obligations under this Agreement.


11.  PATENT PROSECUTION; PATENT AND TRADEMARK INFRINGEMENT; KNOW-HOW;
     PROPRIETARY RIGHTS

11.1 Patent Prosecution. Centaur shall continuously use its best reasonable
     ------------------                                                    
     efforts in the continued prosecution and maintenance of Licensed Patents
     including, without limitation,

     (a)  taking those actions needed to maintain the pendency of all pending
          national phase patent applications within Licensed Patents; to gain
          their allowance and grant as issued patents; and to maintain these
          issued patents by the timely payment of all taxes and maintenance
          fees;

     (b)  taking those actions needed to maintain the pendency of pending South
          African patent application and pending Patent Cooperation Treaty (PCT)
          patent application US96/04538 through PCT Chapter I and Chapter II
          processing; to convert, no later than 26. September 1997 with written
          confirmation hereof to Lundbeck, and in accordance with a written
          notice as how to so convert by Centaur to Lundbeck no later than 3.
          September 1997,  this PCT patent application to any and all necessary
          supranational and/or national applications in the countries of the
          European Union, Norway, Switzerland, Iceland, Poland, Rumania,
          Hungary, Russia, Estonia, Latvia, Lithuania, the Czech Republic,
          Croatia and Slovenia (for the purpose of this Section 11.1 such
          countries are collectively called "Core Patent Countries") and those
          other jurisdictions in the Territory reasonably agreed upon by Centaur
          and Lundbeck, and thereafter to maintain the pendency of all these
          national phase and supranational phase patent applications; to gain
          their allowance and grant as issued patents; and to maintain them by
          the timely payment of all taxes and maintenance fees; and

     (c)  taking those actions needed to obtain any appropriate Supplementary
          Protection Certificates for medicinal products or patent term
          extensions for medicinal products for Licensed Patents wherever within
          the Territory such Certificates or extensions are desirable and
          permitted.

     (d)  Notwithstanding the above, should Centaur believe that prosecution or
          maintaining 

                                                                              39
<PAGE>
 
                                                                31, October 1996

          Licensed Patents in a given country or countries of the Territory
          other than in the Core Patent Countries is not necessary or
          commercially advisable, Centaur will give Lundbeck notice of this fact
          no less than sixty (60) days before any action for the further
          prosecution or maintaining is due. Within thirty (30) days of such
          notice Lundbeck may notify Centaur in writing that it wishes to
          prosecute and /or maintain such patent(s) on behalf of Centaur.
          Lundbeck may then do so and Centaur will cooperate with Lundbeck in
          this effort. Lundbeck's costs in so prosecuting and/or maintaining a
          patent in a country may be credited, dollar for dollar, against
          royalties Lundbeck would otherwise pay on Net Sales of Licensed
          Product in that country. Costs of prosecuting and/or maintaining a
          patent in one country may not be credited against royalties on Net
          Sales of Licensed Product in another country.

     (e)  Centaur shall within 15 days of Lundbeck's request, advise Lundbeck in
          writing of the status of the patent filing, prosecution and/or
          maintenance pertinent to Licensed Patents.

11.2 Notice. Each party shall notify the other party promptly in writing of any
     ------                                                                    
     infringement of Licensed Patents in the Territory or of equivalent patents
     for CPI-1189 outside the Territory which becomes known to such party, and
     Lundbeck and Centaur shall always use their best reasonable efforts to
     avoid Substantial Competition.

11.3 Centaur's Right to Commence Action.  Centaur shall have the initial sole
     ----------------------------------                                      
     right to commence an action for infringement against the infringing party
     in its own name and/or in the name of Lundbeck (and/or its Affiliates and
     sublicensees, if applicable), together with the right to enforce and
     collect any judgment thereon, but such decision to be taken in consultation
     with Lundbeck.  If Centaur elects to exercise the right to commence an
     action, then Lundbeck shall provide reasonable assistance in the
     prosecution of such action including, but not limited to, consenting to
     being joined in such action as a voluntary plaintiff.  Centaur shall bear
     its own internal and external legal and other costs and expenses associated
     with the prosecution of the action. If Centaur brings an action and joins
     Lundbeck herein and the court awards costs against Lundbeck, then Centaur
     shall  reimburse Lundbeck for such costs.  Lundbeck shall have the right to
     independently retain legal counsel and consultants, at Lundbeck's sole cost
     and expense, but such counsel or consultants shall not have the right to
     affect Centaur's sole management of the prosecution of the action.

11.4 Monetary Recovery - Centaur Prosecution.  Any monetary recovery (whether by
     ---------------------------------------                                    
     settlement or judgment) in connection with an infringement action commenced
     by Centaur shall be applied first to reimburse Centaur for its out-of-
     pocket expenses (including reasonable attorneys' fees) incurred in
     prosecuting such action and of any expenses of Lundbeck involved in the
     action, and second, to the extent any monetary recovery represents lost
     profits from lost sales of Licensed Product, that profit, less Centaur's
     royalty on lost Net Sales will be paid to Lundbeck with the royalty amount
     paid to Centaur.  Any balance remaining shall be shared in the ratio of
     80:20, Centaur:Lundbeck, respectively.

11.5 Lundbeck Prosecution and Monetary Recovery.  Should Centaur not initiate
     ------------------------------------------                              
     appropriate 

                                                                              40
<PAGE>
 
                                                                31, October 1996

     and diligent action with respect to any such infringement set out in
     Sections 11.3-4 within three (3) months after receiving notice of any
     infringement, other than insignificant infringements, or possible
     infringement, other than insignificant possible infringements, of a
     Licensed Patent, Lundbeck shall have the right, but not the obligation, to
     take such action, at its own expense, in its own name and/or in the name of
     Centaur with the right to enforce and collect any judgment thereon. If
     Lundbeck elects to exercise the right to commence an action, then Centaur
     shall provide reasonable assistance in the prosecution of such action
     including, but not limited to, consenting to being joined in such action as
     a voluntary plaintiff. Lundbeck shall bear its own internal and external
     legal and other costs and expenses associated with the prosecution of the
     action. If Lundbeck brings an action and joins Centaur herein and the court
     awards costs against Centaur, then Lundbeck shall reimburse Centaur for
     such costs. and shall reimburse Centaur's costs associated with Lundbeck
     having prosecuted the action fully or partly in Centaur's name. Centaur
     shall have the right to independently retain legal counsel and consultants,
     at Centaur's sole cost and expense, but such counsel or consultants shall
     not have the right to affect Lundbeck's sole management of the prosecution
     of the action, except in the case where the opponent alleges that the
     Licensed Patents are invalid, in which case Centaur may enter such case and
     control it to the extent required to defend the validity of Licensed
     Patents, and if Centaur is so entering the case then Section 11.6 (i) shall
     apply mutatis mutandis. Any monetary recovery (whether by settlement or
     judgment) in connection with an infringement action commenced by Lundbeck
     shall be applied first to reimburse Lundbeck for its out-of-pocket expenses
     (including reasonable attorneys' fees) incurred in prosecuting such action
     and of any expenses of Centaur involved in the action, and second, to the
     extent any monetary recovery represents lost profits from lost sales of
     Licensed Product, that profit, less Centaur's royalty on lost Net Sales
     will be paid to Lundbeck with the royalty amount paid to Centaur. Any
     balance remaining shall be shared in the ratio of 80:20, Lundbeck:Centaur,
     respectively.

11.6 Third Party Claims of Infringement.  In the event of a third party claim
     ----------------------------------                                      
     that the exercise of the Lundbeck License with respect to the manufacture,
     sale or other use of Licensed Product infringes any patent of such third
     party in a country in the Territory (a "Third Party Claim"), Centaur shall
     consult with Lundbeck and with respect to such Third Party Claim, Centaur
     shall (i) undertake, at Centaur's sole cost and expense, defense of such
     Third Party Claim, or (ii) request Lundbeck to undertake such defense, at
     Lundbeck's sole cost and expense. Each party will provide such reasonable
     assistance as the other needs and from time to time reasonably request.
     Neither Lundbeck nor Centaur shall settle any Third Party Claim, including
     an agreement to pay Third Party Royalties, without the reasonable approval
     of the other party.  If Lundbeck shall, at Lundbeck's sole cost and
     expense, undertake to defend such Third Party Claim, fifty percent (50 %)
     of all such costs and expenses incurred by Lundbeck, including, without
     limitation, expert witness and attorneys' fees, and such damages payable to
     any third party (other than Third Party Royalties) shall be deducted from
     Basic Royalty or Trademark Royalty royalties payable to Centaur hereunder
     from any country in the Territory, provided that Centaur as per the Date of
     Execution has no knowledge of the Third Party Claim and/or of direct or
     indirect arrangement as to the use of CPI-1189 or any right pertaining
     thereto with the party so making the Third Party Claim, otherwise all such
     costs and expenses may be deducted in the said royalty payments.

                                                                              41
<PAGE>
 
                                                                31, October 1996

11.7   Payment of Third Party Royalties.  Except as provided in Section 2.4 (d),
       --------------------------------                                         
       should Lundbeck or its sublicensees or Affiliates obtain one or more
       licenses under a patent not licensed hereunder and agree to pay a royalty
       in order to make, use or sell a Licensed Product in the Territory
       (whether as a condition of settlement of an infringement action, or by
       court order or for any other reason) the obtaining of such license must
       be reasonably approved by Centaur unless required by court order. The
       Basic Royalty or the Trademark Royalty payable to Centaur hereunder shall
       be reduced by fifty percent (50%) of the royalties paid to such third
       party, unless Centaur as per the Date of Execution has no knowledge of
       the Third Party Claim and/or of direct or indirect arrangement as to the
       use of CPI-1189 or any right pertaining thereto with the party so making
       the Third Party Claim in which case the said royalties shall be reduced
       with all the Third Party Royalties.

11.8   Registering Trademark.  Lundbeck shall select, and Centaur shall approve,
       ---------------------                                                    
       which approval shall not be unreasonably withheld or delayed, at least
       one Trademark for possible use on Licensed Products in the Territory and
       Centaur shall file applications for registrations and shall maintain such
       Trademark(s) in its own name. If Centaur has difficulties or is unable to
       register a selected Trademark, Centaur shall promptly advise Lundbeck and
       the parties shall discuss either to continue prosecution of the
       application, or Centaur shall select another Trademark which Lundbeck
       shall approve, which approval shall not be unreasonably withheld or
       delayed. All costs and expenses (including attorney's fees) associated
       with the filing of applications, prosecution of applications,
       registration and maintenance of registrations of Trademark shall be paid
       by Centaur. Lundbeck shall assist and cooperate with Centaur in its
       filing and prosecuting all Trademark applications and maintaining
       Trademark registrations as well as will sign all documents necessary to
       carry out filing and prosecuting such applications and maintaining such
       registrations, if necessary. Trademarks so selected and registered shall
       be the sole and exclusive property of Centaur.

11.9   No Confusingly Similar Marks.  Neither Centaur nor Lundbeck shall select,
       ----------------------------                                             
       file an application or register any trademark in the Territory
       confusingly similar to that which Lundbeck selects pursuant to the above
       paragraph. Lundbeck shall not elect, file an application or register any
       trademark outside the Territory confusingly similar to that which
       Lundbeck selects pursuant to the above paragraph.

11.10  Quality Control Provision. All Licensed Products offered for sale by
       -------------------------                                           
       Lundbeck bearing any Trademark licensed hereunder shall be of good
       quality. The term "good quality" shall for the purposes of this Section
       11.10 mean that the Licensed Product bearing the Trademark shall comply
       with the applicable laws and regulations for such products in the
       jurisdiction in which such Licensed Products are manufactured or offered
       for sale.

12.    LIABILITY AND INDEMNIFICATION

12.1   Limitation of Liability - Direct Damages.  A party shall be liable to the
       ----------------------------------------                                 
       other for any direct damage or personal injury caused or contributed to
       by any action or inaction only if such action or inaction was the result
       of negligence.

                                                                              42
<PAGE>
 
                                                                31, October 1996

12.2 Limitation of Liability - Indirect Damages.  Neither party nor its
     ------------------------------------------                        
     directors, officers and employees shall be held liable for any incidental,
     indirect or consequential damages, including, but not limited to the loss
     of opportunity, loss of the use of any data or information supplied
     hereunder, loss of revenue or profit in connection with or arising out of
     this Agreement, the services performed by either party hereunder or the
     existence, furnishing, functioning, or the other party's use of any
     information, documentation or services provided pursuant to this Agreement,
     even if the party causing the damage have been advised of the possibility
     of such damages.

12.3 Centaur Indemnification.  Centaur agrees to indemnify, defend and hold
     -----------------------                                               
     Lundbeck and each of its officers, directors, employees, agents and
     consultants (and their respective heirs and assigns)  (each a "Lundbeck
     Indemnitee") harmless against all costs, claims, suits, expenses (including
     reasonable attorneys' fees) and damages in the Territory arising from any
     negligence of Centaur and each of Centaur's officers, directors, employees,
     agents, sub-contractors and consultants in the manufacture of Bulk Product
     and/or Bulk Sustance by Centaur if Centaur has failed to manufacture Bulk
     Product and/or Bulk Substance in accordance with the Specifications,
     provided that the Lundbeck Indemnitee gives reasonable notice to Centaur of
     any such claims or action, tenders the defense of such claim or action to
     Centaur and assists Centaur at Centaur's expense in defending such claim or
     action and does not compromise or settle such claim or action without
     Centaur's prior written consent.

12.4 Lundbeck Indemnification.  Lundbeck agrees to indemnify, defend and hold
     ------------------------                                                
     Centaur and each of its officers, directors, employees, agents and
     consultants (and their respective heirs and assigns)  (each a "Centaur
     Indemnitee") harmless against all costs, claims, suits, expenses (including
     reasonable attorneys' fees) and damages in the Territory arising from any
     negligence of Lundbeck, or any third party for whom Lundbeck is
     responsible, (a) in the manufacture of Bulk Product and/or Bulk Substance
     by Lundbeck if Lundbeck has failed to manufacture Bulk Product and/or Bulk
     Substance in accordance with the Specifications, or (b) in the
     distribution, promotion, marketing and/or selling of Licensed Product in
     the Territory, provided that the Centaur Indemnitee gives reasonable notice
     to Lundbeck of any such claims or action, tenders the defense of such claim
     or action to Lundbeck and assists Lundbeck at Lundbeck's expense in
     defending such claim or action and does not compromise or settle such claim
     or action without Lundbeck's prior written consent.

12.5 Insurance.  Both parties hereto shall take out and maintain in full force
     ---------                                                                
     and effect for the term of this Agreement insurance with first class
     insurers covering their respective liabilities under this Article, and each
     party shall without delay upon request from the other party forward copies
     of the relevant certificates of such insurance.


13.  TERM AND TERMINATION

13.1 Term.  The term of this Agreement shall be for a period beginning with the
     ----                                                                      
     Date of Execution.  Unless sooner terminated pursuant to this Section 13,
     the term of this Agreement shall end at such time as Lundbeck shall have no
     further obligation to make 

                                                                              43
<PAGE>
 
                                                                31, October 1996

     payments to Centaur on Net Sales of Licensed Product, but the perpetual
     royalty-free license to the Trademark set forth in Section 5.11 shall
     continue unaffected unless terminated pursuant to Section 13.2-13.9.

13.2 Lundbeck Right to Terminate on Three or Twelve Months Prior Written Notice.
     -------------------------------------------------------------------------- 
     (a)  Lundbeck may at any time, prior to obtaining Approval for Sale of a
          Licensed Product in the first country in the European Union, terminate
          this Agreement for any reason, effective upon three (3) months' prior
          written notice.  Upon such termination, Lundbeck shall have no further
          rights or obligations under this Agreement except (i) for the payment
          obligation provided in Section 4.4 above, (ii) for the costs of any
          activities under the Plan or other obligations that Lundbeck had
          previously committed to (as opposed to generally agreeing to perform
          by virtue of adopting the Plan and the commencement of which having
          not been finally approved by the Steering Committee), and (iii) that
          Lundbeck shall promptly transfer to Centaur all permissions for
          clinical trials and Registrations it has made in the Territory and all
          Trademarks under which it would have or is marketing Licensed Product.

     (b)  Lundbeck may at any time, after having obtained Approval for Sale of a
          Licensed Product in the first country in the European Union, terminate
          this Agreement for any reason, effective upon twelve (12) months'
          prior written notice.

     (c)  Upon termination as set forth in Sub-paragraphs (a) and (b)
          immediately above, Lundbeck shall have no further rights or
          obligations under this Agreement except that Lundbeck shall promptly
          transfer to Centaur all permissions for clinical trials and
          Registrations it has made in the Territory and all Trademarks under
          which it would have or is marketing Licensed Product To the extent
          Lundbeck is not legally able to effect such transfers, with regard to
          the Registrations, Lundbeck will transfer to Centaur all materials
          submitted to the relevant regulatory agencies as well as back-up
          materials to permit Centaur to make its own filings, and with regard
          to the Trademarks Lundbeck cease using the Trademarks to market, sell
          and promote the Licensed Products.  The license granted to Centaur in
          Section 2.2 will become worldwide.  Lundbeck shall return all
          Confidential Information, except for one copy held in Lundbeck's
          confidential legal files for the sole purpose of monitoring compliance
          with its confidentiality obligations.  Lundbeck shall, among other
          things, cease using the permission to perform clinical trials in the
          Territory, Registrations and Confidential Information.

13.3 Extended Force Majeure Conditions.  With the exception of a Force Majeure
     ---------------------------------                                        
     situation involving Centaur's ability to supply Bulk Product, which is
     governed by Section 7.20 above, if Force Majeure conditions as set forth in
     Section 14 below persist for more than twelve (12) months from the date
     when the notice in which a party has pleaded Force Majeure was sent, the
     other party will be entitled to terminate this Agreement by written notice
     with immediate effect.

13.4 Material Breach.  If either party is in material breach of any of its
     ---------------                                                      
     obligations under this Agreement (except for breaches of obligations under
     Section 7 which are addressed in 

                                                                              44
<PAGE>
 
                                                                31, October 1996

     Section 7.22 and Section 13.9 and not hereunder), the other party may give
     notice of such breach to the defaulting party and request the latter to
     remedy the same. If the party in breach fails to remedy said breach within
     thirty (30) days after the date of notice, then this Agreement may be
     terminated immediately by written notice of termination given by the
     complaining party, providing such notice is given within ninety (90) days
     from the expiration of the first thirty (30) day period. If the breach by
     its nature cannot be remedied, the notice of breach shall have effect as
     notice of termination at the date it is received by defaulting party.

13.5 Insolvency or Bankruptcy.  Either party may, in addition to any other
     ------------------------                                             
     remedies available to it by law or in equity, terminate this Agreement by
     written notice to the other in the event (i) the other party shall have
     become insolvent or bankrupt, or shall have made an assignment for the
     benefit of its creditors, or (ii) there shall have been appointed a trustee
     or receiver of the other party, or (iii) any case or proceeding shall have
     been commenced or some other action taken by or against the other party in
     bankruptcy or seeking reorganization, liquidation, dissolution, winding-up,
     arrangement, composition or readjustment of its debts or any other relief
     under any bankruptcy, insolvency, reorganization or other similar act or
     law of any jurisdiction now or hereafter in effect of there shall have been
     issued a warrant of attachment, execution, distraint or similar process
     against any substantial part of the property of the other party, and any
     such event or action (except where a party voluntarily takes such actions
     (e.g., where a party makes a bankruptcy filing)) shall have continued for
     -----                                                                    
     ninety (90) days undismissed, unbounded and /or undischarged (alternatively
     a "Bankruptcy").

13.6 Certain Consequences of Bankruptcy.  In addition to the rights provided in
     ----------------------------------                                        
     Section 13.5 above, in the event of a Lundbeck Bankruptcy, all rights will
     revert to Centaur and the parties undertake to enact an orderly transition
     to do so including, without limitation,  that Lundbeck shall promptly
     transfer to Centaur all Registrations it has made in the Territory and all
     Trademarks under which it would have or is marketing Licensed Product.  To
     the extent Lundbeck is not legally able to effect such transfers, with
     regard to the Registrations, Lundbeck will transfer to Centaur all
     materials submitted to the relevant regulatory agencies as well as back-up
     materials to permit Centaur to make its own filings, and with regard to the
     Trademarks, Lundbeck will license Centaur exclusively on a royalty-free
     basis to use the Trademarks to market, sell and promote the Licensed
     Products on a world-wide basis.

13.7 Certain Consequences of an Acquisition of Centaur.  Should a multi-national
     -------------------------------------------------                          
     pharmaceutical or diagnostic company acquire more than 50% of the
     outstanding stock of Centaur entitled to vote for directors and there are
     still non-clinical, clinical or other activities ongoing under the Plan,
     then Lundbeck may, at its sole option,  request that it have another
     partner for these trials, in which case Centaur will cooperate and consult
     with Lundbeck and use its best reasonable efforts to find such other
     partner.

13.8 Rights Upon and Effect of Termination of Agreement.
     -------------------------------------------------- 

     (a)  Existing Obligations.  Upon termination of this Agreement for any
          --------------------                                             
          reason, nothing herein shall be construed to release either party from
          any obligation that matured 

                                                                              45
<PAGE>
 
                                                                31, October 1996

          prior to the effective date of such termination.

     (b)  Surviving Provisions.  Upon termination of this Agreement the
          --------------------                                         
          following provisions in addition to those provisions which survive
          according to their own terms, such as without limitation Section 5.11
          and Section 10, shall survive: Sections 1, 9, 16 and 17.8.

     (c)  Sale of Stocks (Inventory).  Upon termination of this Agreement under
          --------------------------                                           
          Section 13.2 or under Section 13.3, 13.4 or 13.5  by Centaur, Centaur
          shall have the right to buy any stocks of Licensed Products remaining
          unsold (if produced by Lundbeck, at Lundbeck's production costs or if
          purchased by Lundbeck, at Lundbeck's purchase price) and/or any stocks
          of CPI-1189 (if produced by Lundbeck, at Lundbeck's production costs
          or if purchased by Lundbeck, at Lundbeck's purchase price) in the
          possession of Lundbeck after the effective date of termination.  In
          the event Centaur does not wish to exercise the right to buy back
          Licensed Products, and/or CPI-1189, Lundbeck shall have the right to
          use the remaining CPI-1189 for the manufacture of Licensed Products
          and sell out the remaining stock of Licensed Products within a
          reasonable period of time.

     (d)  Termination by Centaur or Lundbeck Voluntary Termination.  At the
          --------------------------------------------------------         
          effective date of termination by Centaur for a material breach by
          Lundbeck or if Lundbeck determines to terminate this Agreement in
          accordance with Section 13.2 above, in both cases the provisions of
          Section 13.2 will apply and, in addition, Centaur shall have the
          royalty-free, non-exclusive, worldwide right to use Confidential
          Information (Know How, Information and Synthesis Data) owned and
          controlled by Lundbeck.  Lundbeck will allow any reference to the
          Registrations obtained.

13.9 Special Provisions Relating to Centaur Default of Section 7 Obligations and
     ---------------------------------------------------------------------------
     Bankruptcy and Supply of Bulk Product.  Should there be a Centaur Default
     -------------------------------------                                    
     (as defined in Section 7.22) of its material obligations under Section 7,
     except for Force Majeure in which case Section 7.20 applies,  or a Centaur
     Bankruptcy (as defined above in Section 13.5), then Lundbeck has the
     following rights.

     (a)  If a Licensed Product exists (meaning that a Licensed Product has
          obtained regulatory approval, but not necessarily reimbursement
          approval, in any country in the Territory or in the United States),
          then Lundbeck has the right to (i) manufacture all of its requirements
          of Bulk Product in the Territory, and (ii) may establish a back-up
          manufacturer of its choosing.  Lundbeck will continue to pay royalties
          on Net Sales of Licensed Product to Centaur, but will not be required
          to make any payments to Centaur related to supply of Bulk Product
          maintaining full and unchanged access and license to Centaur
          Technology and to regularly receive Centaur Know-How; or

     (b)  If a Licensed Product does not exist (using the same meaning of
          "exist" as subparagraph (a) above) and non-clinical or clinical
          development is still necessary, then Lundbeck (i) may perform the non-
          clinical and clinical activities under the Plan that remain to be
          done, crediting one half of those costs plus interest as set forth in

                                                                              46
<PAGE>
 
                                                                31, October 1996

          Section 6.10 against royalties it will owe Centaur, (ii) will have no
          obligation to make any further Annual Fee payments under Section 4.3
          above, (iii) will have no obligation to make any further payments
          under Section 4.1 above, (i) may  manufacture all of its requirements
          of Bulk Product for the Territory, and (v) may establish a back-up
          manufacturer of its choosing.  Lundbeck will continue to pay royalties
          on Net Sales of Licensed Product to Centaur, but will not be required
          to make any payments to Centaur related to supply of Bulk Product
          maintaining full and unchanged access and license to Centaur
          Technology; or

     (c)  Lundbeck may terminate this Agreement by written notice to Centaur to
          take effect forthwith.


14.  FORCE MAJEURE

14.1 "Force Majeure" when used in this Agreement means any default or delay
     (including, without limitation, an inability to supply Bulk Product and/or
     Licensed Product) attributable to any act of God, earthquake, flood, fire,
     explosion, destruction of machines, of factories, of substantial
     installations, strike, lockout, go-slows, occupation of factories and
     premises, work stoppages, labor dispute, casualty or accident, war,
     revolution, civil commotion, act of public enemies, blockage or embargo,
     injunction, law, order, proclamation, regulation, ordinance, demand or
     requirement of any government or subdivision, authority (including, without
     limitation, drug regulatory authorities) or representative of any such
     government, or any other cause beyond the reasonable control of such party.
     Neither party shall be liable to the other for loss or damages or shall
     have any right to terminate this Agreement for Force Majeure, if the party
     affected shall give prompt notice of any such cause to the other party.
     The party providing such notice shall  thereupon be excused from such of
     its obligations hereunder as it is so disabled and for thirty (30) days
     thereafter provided, however, that Force Majeure events relating to Section
     7 will be governed by the provisions of Section 7.20 and events relating to
     Section 13 will be governed by Section 13.3.  Notwithstanding the
     foregoing, nothing in this Section shall excuse or suspend the obligation
     to make any payment due hereunder in the manner and time provided.


15.  WARRANTIES AND REPRESENTATIONS

15.1 General Representations.  Each party hereby represents and warrants to the
     -----------------------                                                   
     other as follows:

     (a)  Duly Organized.  It is a corporation duly organized, validly existing
          --------------                                                       
          and is in good standing under the laws of the jurisdiction of its
          incorporation, is qualified to do business and is in good standing as
          a foreign corporation in each jurisdiction in which the conduct of its
          business or the ownership of its properties requires such
          qualification and has all requisite power and authority, corporate or
          otherwise, to conduct its business as now being conducted, to own,
          lease and operate its properties and to execute, deliver and perform
          this Agreement.

                                                                              47
<PAGE>
 
                                                                31, October 1996

     (b)  Due Execution.  The execution, delivery and performance by it of this
          -------------                                                        
          Agreement (including the grant of the Lundbeck License by Centaur and
          of the Centaur License by Lundbeck) have been duly authorized by all
          necessary corporate action and do not and will not (i) require any
          consent or approval of its stockholders, (ii) violate any provision of
          any law, rule, regulation, order, writ, judgment, injunction, decree,
          determination or award presently in effect having applicability to it
          or any provision of its charter or by-laws, or (iii) result in a
          breach of or constitute a default under any agreement, mortgage,
          lease, license, permit, patent or other instrument or obligation to
          which it is a party or by which it or its assets may be bound or
          affected.

     (c)  No Third Party Approval.  No authorization, consent, approval,
          -----------------------                                       
          license, exemption of, or filing or registration with, any court or
          governmental authority or regulatory body is required for the due
          execution, delivery or performance by it of this Agreement (including
          the grant of the Lundbeck License by Centaur  and of the Centaur
          License by Lundbeck) as it relates to CPI-1189.

     (d)  Binding Agreement.  This Agreement is a legal, valid and binding
          -----------------                                               
          obligation of such party, enforceable against it in accordance with
          its terms and conditions, except as may be limited by bankruptcy laws
          or other laws affecting the rights of creditors generally, and rules
          of law governing equitable remedies.  Each is not under any obligation
          to any person, contractual or otherwise, that is conflicting or
          inconsistent in any respect with the terms of this Agreement
          (including the grant of the Lundbeck License by Centaur  and of the
          Centaur License by Lundbeck) or that would impede the diligent and
          complete fulfilment of its obligations hereunder.

     (e)  Governmental Status.  It is not debarred or suspended from receiving
          -------------------                                                 
          contracts from the United States or Danish government or other
          governmental authority or agency.

     (f)  Full Disclosure.  Each party has disclosed to the other in good faith
          ---------------                                                      
          any and all material information relevant to the subject matter of
          this Agreement to such party's ability to observe and perform its
          obligations hereunder.

15.2 Centaur Representations.  Centaur represents and warrants to Lundbeck that:
     -----------------------                                                    

     (a)  as of the Date of Execution, to the best of Centaur's knowledge and
          belief, Centaur is the sole owner of the entire right, title and
          interest in and to those Licensed Patents which include a Valid Claim
          for CPI-1189 and the same are free of any liens, encumbrances,
          restrictions, licenses and other legal or equitable claims of any kind
          or nature;

     (b)  as of the Date of Execution, to the best of Centaur's knowledge and
          belief, Centaur is the sole owner or licensee of the entire right,
          title and interest in the part of the Centaur Technology not being
          Licensed Patents which include a Valid Claim for CPI-1189 and the same
          are free of any liens, encumbrances, restrictions, licenses and other
          legal or equitable claims of any kind or nature;

                                                                              48
<PAGE>
 
                                                                31, October 1996

     (c) it has the right to grant the Lundbeck License;

     (d)  has not granted any license or sublicense of Centaur Technology for
          CPI-1189 in the Primary Indication;

     (e)  as of the Date of Execution, to the best of Centaur's knowledge and
          belief, there are no third party rights, licenses or patents, other
          than the Lundbeck License, which is necessary for Lundbeck's use and
          enjoyment of the Lundbeck License; and

     (f)  as of the Date of Execution Centaur has initiated no plans for and has
          filed no IND for an Additional Compound.

15.3 Lundbeck Representations.  Lundbeck represents and warrants to Centaur
     ------------------------                                              
     that:

     (a)  Lundbeck is acknowledged by the authorities in parts of the Territory
          as an approved manufacturer and marketer of drugs, and is as such
          under the inspection of the competent authorities;
 
     (b)  Lundbeck, to the best of its knowledge, has been granted every
          reasonable assistance by Centaur in any inquiry concerning this
          Agreement and its subject matter; and

     (c)  it has the right to grant the Lundbeck License;

15.4 Warranty Disclaimers.  Nothing in this Agreement shall be construed as:
     --------------------                                                   

     (a)  a warranty or representation by Centaur as to the validity or scope of
          the Centaur Technology, other than as specifically provided to the
          contrary herein;

     (b)  a warranty or representation that anything made, used, sold or
          otherwise disposed of under this Agreement is or will be free from
          infringement of patents, copyrights and trademarks of third parties;

     (c)  an obligation to bring or prosecute actions or suits against third
          parties for infringement;

     (d)  conferring rights to use in advertising, publicity or otherwise any
          trademark or the name of Centaur or Lundbeck;

     (e)  granting by implication, estoppel or otherwise any licenses under (i)
          patents of Centaur other than the Centaur Patents, and (ii) the
          Centaur Technology outside of the Primary Indication and/or outside of
          the Territory;

     (f)  any representation by either party, express or implied, other than as
          specifically set forth herein, including representations of
          merchantability or fitness for a particular purpose, or that the use
          of Licensed Product will not infringe any third party patent,

                                                                              49
<PAGE>
 
                                                                31, October 1996

          copyright, trademark or other rights.


16.  RESOLUTION OF DISPUTES

16.1 General.  In acknowledgment of the benefit to both parties to resolve
     -------                                                              
     differences quickly and efficiently with as little disruption of each
     parties' business as possible, the parties agree to abide by the following
     provisions in connection  with any dispute that should arise between the
     parties with respect to any matter relating to this Agreement, including
     any questions regarding the existence, validity or termination thereof.

16.2 Conciliation.  In the event that any controversy or claim shall arise
     ------------                                                         
     under, out of, in connection with, or relating to this Agreement or the
     breach thereof, the party initiating such controversy or making such claim
     shall provide to the other party a written notice containing a brief and
     concise statement of the initiating party's claims, together with relevant
     facts supporting them.  During a period of sixty (60) days, or such longer
     period as may be mutually agreed upon in writing by the parties, following
     the date of said notice, the parties shall make good faith efforts to
     settle the dispute.  Such efforts will include, but shall not be limited
     to, full presentation of both parties' claims and responses, with or
     without the assistance of counsel, before the President of Lundbeck and the
     President of Centaur, or an equivalent executive if such positions do not
     exist in the respective companies.

16.3 Arbitration.
     ----------- 

     (a)  Selection of Arbitrators.  In the event that the parties are unable to
          ------------------------                                              
          resolve a dispute in accordance with Section 16.2 above, either party
          may submit the matter to binding arbitration in accordance with the
          procedures set forth below.  If a party intends to commence
          arbitration to resolve a dispute, such party shall provide written
          notice to the other party of such intention, and shall designate one
          arbitrator.  Within ten (10) days of receipt of such notice, the other
          party shall designate in writing a second arbitrator.  The two
          arbitrators so designated shall, within ten (10) days thereafter,
          designate a third arbitrator.  The arbitrators so designated shall not
          be employees, consultants, officers, directors or shareholders of or
          otherwise associated with either party or an Affiliate or sublicensee
          of either party.  Except as modified by the provisions of this Section
          16, the arbitration  shall be conducted in accordance with the then
          rules of commercial arbitration of and before the American Arbitration
          Association in Toronto, Canada. The language of such arbitration shall
          be English and all notices and written submissions provided in such
          proceeding shall be in English.

     (b)  Written Proposals.  Within thirty (30) days after the designation of
          -----------------                                                   
          the third arbitrator, the arbitrators and the parties shall meet at
          which time each party shall be required to set forth in writing the
          issues which need to be resolved and  a proposed ruling on each such
          issue.  Written submissions shall be limited to 30 pages to text (not
          including exhibits which may include copies of agreements, or extracts
          from books and records, but including testimony affidavits).

                                                                              50
<PAGE>
 
                                                                31, October 1996

     (c)  Hearing.  The arbitrators shall set a date for a hearing, which shall
          -------                                                              
          be no later than thirty (30) days after the submission of written
          proposals, to discuss each of the issues identified by the parties.
          Each party shall have the right to be represented by counsel.  The
          arbitrators shall have sole discretion with regard to the
          admissibility of any evidence.  Unless otherwise determined by
          unanimous agreement of the arbitrators the hearing shall be concluded
          in one (1) day unless the arbitrators conclude (by majority vote or
          greater) that the hearing should be extended to avoid working an
          injustice to one of  the parties. The arbitrators shall have the right
          to grant a temporary injunction or a preliminary injunction for good
          cause shown, upon the filing of a petition for such relief by a  party
          to this Agreement, the arbitrators deciding on the security, if any,
          to be made by the party seeking such relief for any unwarranted
          injunction

     (d)  Ruling.  The arbitrators shall use their best efforts to rule on each
          ------                                                               
          disputed issue within thirty (30) days after the completion of the
          hearings described in subsection (c) above.  The arbitrators shall, by
          majority decision, select the ruling proposed by one of the parties as
          the arbitrators' ruling.  The arbitrators' ruling shall be, in the
          absence of fraud or manifest error, binding and conclusive upon both
          parties and may be enforced in a court of competent jurisdiction.  The
          arbitrators may not award punitive or exemplary damages.

     (e)  Arbitration Costs.  The arbitrators shall be paid a reasonable fee
          -----------------                                                 
          plus expenses, which fees and expenses shall be paid as designated by
          the arbitrators or if the arbitrators do not so designate such costs
          shall be shared equally by the parties.

     (f)  Attorneys' Fees/Costs.  If any arbitration, litigation, or other legal
          ---------------------                                                 
          proceeding occurs between the Parties relating to this Agreement, the
          prevailing party shall be entitled to recover (in addition to any
          other relief awarded or granted) its reasonable costs and expenses,
          including attorneys' fees, incurred in the proceeding.


17.  MISCELLANEOUS PROVISIONS

17.1 Assignability and Sublicenses.  This Agreement shall not be assignable or
     -----------------------------                                            
     transferable, in whole or in part, by either party without the prior
     written consent of the other.  No assignment or sublicense agreement shall
     relieve any party of responsibility for the performance of any accrued
     obligation which such party has then hereunder.

17.2 Publications.  The parties to this Agreement are free to make presentations
     ------------                                                               
     and publications relating to the results of any activities conducted
     pursuant to this Agreement prior to marketing of Licensed Product, but with
     due regard to the protection of Confidential Information and Licensed
     Patents hereunder and always provided that the Steering Committee has
     approved the scientific content of any such presentation or publication.
     For that purpose, the parties agree to provide the party's Project Leader
     and each member of the Steering Committee with a copy of any proposed
     written presentation, 

                                                                              51
<PAGE>
 
                                                                31, October 1996

     abstract and/or publication relating to the results of such activities at
     least thirty (30) days prior to submission thereof for publication or
     presentation thereof. Each party will take due note of any comment by the
     other party and shall respect the response of the Steering Committee.

17.3 Public Announcements.  Each party agrees that, except as may be required by
     --------------------                                                       
     law, it shall not disclose the existence, substance or details of this
     Agreement without the prior written consent of the other party.  In cases
     in which disclosure is proposed or required by law, the disclosing party,
     prior to such disclosure, will notify the non-disclosing party of the
     contents of the proposed disclosure.  The non-disclosing party shall have
     the right to make reasonable changes to the disclosure to protect its
     interests.  The disclosing party shall not unreasonably refuse to include
     such changes in its disclosure.  Notwithstanding the above, any publicity,
     press release or announcement relating to the Licensed Product issued by
     Lundbeck shall mention Centaur to the extent reasonably feasible.

17.4 Notices.  All notices hereunder shall be in writing and shall be delivered
     -------                                                                   
     personally or mailed by registered or certified (air) mail (return receipt
     requested), postage prepaid, or by internationally recognized courier, or
     by facsimile or delivery service for which receipt is given, to the
     following addresses of the respective parties, with a copy to the
     addressee's General Counsel:

     If to Centaur:      Centaur Pharmaceuticals, Inc.
                         484 Oakmead Parkway
                         Sunnyvale, CA 94086
                         United States of America
                         Attention:  President

     If to Lundbeck:     H. Lundbeck A/S
                         Ottiliavej 9
                         DK-2500 Copenhagen-Valby
                         Denmark
                         Attention: President
 
     Such notice shall be effective upon receipt.

17.5 Entire Agreement and Modifications.  This Agreement constitutes the entire
     ----------------------------------                                        
     agreement between the parties concerning the subject matter hereof and
     supersedes all written or oral prior agreements or understandings with
     respect to the subject matter hereof.  No variation or modification of the
     terms of this Agreement, nor any waiver of any of the terms or provisions
     hereof, shall be valid unless in writing and signed by an authorized
     representative of each party or by the party against whom enforcement
     thereof may be sought.

17.6 Headings.  The headings contained in this Agreement are for convenience and
     --------                                                                   
     reference purposes only and shall not affect the meaning or interpretation
     of this Agreement.

17.7 Severability.   The provisions of this Agreement are separate and
     ------------                                                     
     divisible, and the 

                                                                              52
<PAGE>
 
                                                                31, October 1996

     invalidity or unenforceability of any part shall not affect the validity or
     enforceability of any remaining part or parts, all of which shall remain in
     full force and effect. However, the parties agree to substitute, any
     invalid or unenforceable provision, by a valid and enforceable provision
     which achieves, to the greatest extent possible, the financial balance and
     mutual understanding already established between the parties.

17.8 Governing Law.  This Agreement shall be construed, interpreted and governed
     -------------                                                              
     by the laws of the Province of Ontario and of the Commonwealth of Canada
     without regard to its conflict of law rules. Any issue of law pertaining to
     one or more Licensed Patents shall be construed, interpreted and governed
     by the law of the jurisdiction granting such Licensed Patent.

17.9 Public Notification and Approval.
     -------------------------------- 

     (a)  Both parties may notify any relevant public national and/or supra-
          national entity, including the competition authorities of the United
          States of America, the European Union and of the European Economic
          Area, of the existence of this Agreement to comply with notification
          procedures and/or seek application of approval of this Agreement under
          relevant competition law, and such notifying party shall keep the
          other party informed about any such notification and other
          communication with the said public entities after such notification.
          If none of the parties have informed the other party of its intention
          of notifying this Agreement and/or seeking application of approval of
          this Agreement within 30 days after the Date of Execution both parties
          shall be regarded as having agreed not to notify this Agreement to
          supra-national authorities.  Both party shall be solely responsible
          for notifications to the national public entities in its own
          country/state, and the party having not duly notified the national
          public entities in its own country/state shall hold the other party
          harmless for any claim, fine or any other sanctions from such national
          public entities.

     (b)  The notifying party shall decide at its own discretion how the form of
          notification/approval to be chosen, including, but not limited to
          letter of comfort or formal decision, but the other party may in
          parallel apply another form of notification after having duly
          consulted the first party. Should a party before making any such
          notification wish to informally consult or otherwise discuss with the
          said public entities this Agreement and the notification to be made,
          the notifying party shall inform the other party before any such
          discussions are commenced.

     (c)  Subject to one party intending to notify the said public entities the
          other party shall provide without any undue delay all financial and
          other information about the non-notifying party's company and the
          group of companies that the non-notifying party is affiliated with and
          relevant market information for the Licensed Product reasonably
          required by the notifying party or required by the public entities to
          which notification is made enabling the notifying party to duly make
          the notification or redress inquiries from the said public entities,
          but the non-notifying party may elect to communicate such information
          to the public authorities directly.  The notifying party shall reveal
          Confidential Information only to such public entities to the extent
          necessary for the notification to the said public entities and shall
          do its utmost to 

                                                                              53
<PAGE>
 
                                                                31, October 1996

            impose confidentiality obligations relating to the Confidential
            Information that are as least as limiting on such public entity as
            those obligations imposed on the notifying party hereunder.

       (d)  Should the final decision from the said public entities, or the
            final decision from any body to which the public entities' decision
            may be appealed, decide not to approve this Agreement the parties
            agree to substitute in good faith without delay any not so approved
            provision by a valid and enforceable arrangement which achieves to
            the greatest extent possible the mutual understanding already
            established between the parties, but the invalidity or
            unenforceability of any part shall not effect the validity or
            enforceability of remaining part or parts of this Agreement all of
            which shall remain in full force and effect.

18.    KNOW HOW AND INFORMATION

18.1.  Centaur material. Information, Know How and Synthesis Data supplied by
       ----------------                                                      
       Centaur to Lundbeck are the property of Centaur in whatever shape
       Information, Know How and Synthesis Data are available, both original and
       copy. Centaur shall provide all Know How, Information and Synthesis Data
       as licensed in accordance with this Agreement during the entire term of
       this Agreement within a reasonable time after such is available.

18.2   Lundbeck material. Information, Know How and Synthesis Data supplied by
       -----------------                                                      
       Lundbeck to Centaur are the property of Lundbeck in whatever shape
       Information, Know How and Synthesis Data are available, both original and
       copy. Lundbeck shall provide all Know How, Information and Synthesis Data
       as licensed in accordance with this Agreement during the entire term of
       this Agreement within a reasonable time after such is available.

                                                                              54
<PAGE>
 
                                                                31, October 1996

This Agreement has been made in duplicate and signed by the parties hereto.

Copenhagen,                        Sunnyvale, CA


H. Lundbeck A/S                    Centaur Pharmaceuticals, Inc.



/s/ Erik Sprunk-Jansen             /s/ Brian Frenzel
- ----------------------             -----------------
Erik Sprunk-Jansen                 Brian Frenzel
President                          President

 

/s/ Eva Steiness
- ----------------
Eva Steiness
Executive Vice President
 


/s/ Ole Antonsen
- ----------------
Ole Antonsen
Senior Vice President

Date:   31.10.96                   Date:   October 31, 1996
     -----------                        -------------------   



ANNEXES:

ANNEX A:       Patents and Patent Applications
ANNEX B:       Development Plan
ANNEX C:       Manufacturing Agreement

                                                                              55
<PAGE>
 
                                                                31, October 1996

                                    ANNEX A
                        PATENTS AND PATENT APPLICATIONS

 to Development, Patent and Trademark/Know-How Licensing and Supply Agreement -
      CPI-1189  between H. Lundbeck A/S and Centaur Pharmaceuticals, Inc.

                                                                              56
<PAGE>
 
                                                                    CONFIDENTIAL
                                    Annex A
               Lundbeck/Centaur Patents and Patent Applications
<TABLE> 
<CAPTION> 
Docket                                                                                                      Application
Number  Title                                                          File Date  Country                   Number          Status
- -----------------------------------------------------------------------------------------------------------------------------------
<S>     <C>                                                            <C>        <C>                       <C>             <C> 
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
008MA   Benzamides for Neurodegenerative Disorder Treatment             4/1/96    Morocco                   PV.24193        Pending
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
008ZA   Benzamides for Neurodegenerative Disorder Treatment                       South Africa              N/A             Pending
- -----------------------------------------------------------------------------------------------------------------------------------
009     Pharm Comp'ns of Acetoamidobenzamide Cpds for                   4/3/95    United States             08/415,694      Pending
          for Neurodegenerative Disorders                                           of America
- -----------------------------------------------------------------------------------------------------------------------------------
010     Nitro- and Aminabenzamble Compounds for                         4/3/95    United States             08/415,248      Pending
          for Neurodegenerative Disorders                                           of America
- -----------------------------------------------------------------------------------------------------------------------------------
011     Pharm Comp'ns of Nitro- & Aminabenzamble Cpds                   4/3/95    United States             08/415,847      Allowed
          for Neurodegerative Disorders                                             of America
- -----------------------------------------------------------------------------------------------------------------------------------
</TABLE> 
<PAGE>
 
                                                                31, October 1996

                                    ANNEX B
                                DEVELOPMENT PLAN

 to Development, Patent and Trademark/Know-How Licensing and Supply Agreement -
      CPI-1189  between H. Lundbeck A/S and Centaur Pharmaceuticals, Inc.

Major countries in the European Union identified according to Section 6.5 A:
France, Italy, Germany, Spain and United Kingdom.

Development Bar Chart:

The following Gantt charts outline the development plan for CPI-1189.

      Solid black bars represent tasks performed or to be performed by Centaur.
      Solid white bars represent tasks to be performed by Lundbeck.
      Shaded bars represent tasks to be performed jointly.
      Stripped bars represent tasks for which responsibility will be determined 
      by the steering committee.

               [DIAGRAMS REPRESENTING DEVELOPMENT PLAN OMITTED]

                                                                              57
<PAGE>
 
                                                                31, October 1996

                                    ANNEX C
      MANUFACTURING AGREEMENT (INCLUDING TENTATIVE QUALITY SPECIFICATIONS)

 to Development, Patent and Trademark/Know-How Licensing and Supply Agreement -
      CPI-1189  between H. Lundbeck A/S and Centaur Pharmaceuticals, Inc.

                                                                              59
<PAGE>
 
                                     DRAFT

                                   AGREEMENT

                                  concerning

                    Manufacture and Analysis under Contract

                                    between



Centaur Pharmaceuticals Inc.
484 Oakmead Parkway,
Sunnyvale, CA 94086
USA
(hereinafter referred to as "CENTAUR")

                                      and

H. Lundbeck A/S
Ottiliavej 9
DK-2500 Valby
(hereinafter referred to as "LUNDBECK")



1.    OBJECT

1.1   As CENTAUR is manufacturing pharmaceutical bulk Products (hereinafter
      referred to as Products) of which LUNDBECK is holder of the Marketing
      Approval, the relations between LUNDBECK and CENTAUR have to be 
      established according to the instructions given in "The rules governing
      medicinal products in the European Community, Volume IV, Guide to Good
      Manufacturing Practice for medicinal products".  This Agreement concerns
      manufacture and analytical control of Products mentioned in appendix I.


2.    RELATION TO AUTHORITIES

2.1   CENTAUR certifies that it is acknowledged by the "Food and Drug
      Administration" in USA as an approved manufacturer of drugs and is as such
      under the inspection of the same authorities.

                                                                        Page 1/8
<PAGE>
 
2.2     LUNDBECK bears towards the authorities in ... (hereinafter referred to
        as the Territory) the responsibility for ensuring that the
        specifications, the manufacturing processes established by CENTAUR
        (hereinafter referred to as Specifications) are adequate in all respects
        as required by the health authorities in the Territory. CENTAUR shall at
        all times supply LUNDBECK with the current manufacturing procedures and
        analytical procedures. The procedures do not enter this agreement and
        the agreement will not be updated due to new version of manufacturing
        procedures.

3       MANUFACTURE

3.1     CENTAUR bears the responsibility towards LUNDBECK that Products comply 
        with the Specifications and that the conditions for storage and
        transportation until delivery of the Products to LUNDBECK are fulfilled.
        CENTAUR is furthermore responsible to LUNDBECK for the manufacture and
        the analytical control are in compliance with the GMP-rules referred to
        in item 1.

3.2     CENTAUR shall ensure that all materials delivered to it are correct and 
        according to Specifications for the Products.

3.3     LUNDBECK has the right to obtain sufficient information, including full
        details on the manufacturing processes and analytical procedures, from
        CENTAUR to enable it to evaluate CENTAUR's ability to successfully
        accomplish the work required. LUNDBECK has the right to evaluate
        CENTAUR's ability by visiting CENTAUR's premises upon announcement
        during the term of this Agreement for inspection of facilities,
        equipment, procedures and personnel.

3.4     Any significant change in manufacturing technical arrangements shall be
        agreed upon by both parties and shall be set out in writing. Such change
        shall be made in such a way that it does not cause Products to fail to
        meet the specifications or adversely affect them in any other way.

3.5     CENTAUR will not move the production to any other site than the site
        stated in Appendix I or to a third party without LUNDBECK's approval.
        CENTAUR shall permit LUNDBECK to inspect such new production site

                                                                        Page 2/8
<PAGE>
 
        prior to moving any production process. Manufacturer shall not
        delegate, assign, or subcontract any of its rights and obligations
        hereunder to any third party unless LUNDBECK's written approval has been
        obtained.

3.6     LUNDBECK requires that reworking not covered by previously agreed to
        procedures shall be authorized by LUNDBECK's Quality Control Department
        before the reworking procedure is initiated.

4.      DOCUMENTATION

4.1     CENTAUR shall prepare a "Batch Record" for each batch of Products 
        delivered to LUNDBECK. The Batch Record shall include the following:
        - Production and packaging site
        - Name of preparation and batch number;
        - full manufacturing details;
        - the batch number and quantity of each starting material used in the 
        formulation;
        - a record of the in-process control followed and of the results 
        obtained;
        - signature of the person(s) responsible for the manufacturing operation
        and the date of the signature;
        - certificates of analytical records for each batch,

4.2     The Batch Record shall be approved by CENTAUR, and for each batch
        LUNDBECK requires such Batch Record sent to LUNDBECK's Quality Control
        department.

4.3     The analytical records shall state the results for each analysis
        performed to ensure that the starting materials and the Products comply
        with the Specifications. The said certificates shall be approved by
        CENTAUR's Quality Control Department, and shall be submitted to
        LUNDBECK. Supporting analytical data will be available at CENTAUR for
        inspection by LUNDBECK, or will be submitted to LUNDBECK as agreed to
        between the Parties.

5       RETENTION OF REFERENCE SAMPLES AND DOCUMENTATION

5.1     Batch manufacturing records and analytical records as well as reference
        samples of starting materials and finished Product shall be kept by
        CENTAUR for at least

                                                                        Page 3/8
<PAGE>
 
        one year after expiry of Product. Likewise, CENTAUR shall be monitoring
        the stability of the Product and supply LUNDBECK with the results
        thereof upon request.

6       RELEASE

6.1     LUNDBECK is responsible for the release of Products in the Territory.
        CENTAUR must not deliver Products to LUNDBECK before LUNDBECK's release
        in writing is received.

6.2     Before releasing the Products to the Territory LUNDBECK will ensure,
        that the Products comply with the Specifications, by carrying out
        analysis of each batch and by reviewing the Batch Record and the
        analytical Records provided by CENTAUR.

7       CONTACT PERSONS

7.1     The parties have appointed the following persons as responsible for the
        drawing up of technical arrangements for the manufacture, packaging and
        the quality control of the Products:

        For LUNDBECK:   Mrs. Tove Friche Nielsen,
                        -------------------------
                        Director of Quality Assurance
                        -----------------------------
                        H. Lundbeck A/S, Valby.

        For CENTAUR:    Ms. Claire Qwan, Quality Assurance Officer
                        ------------------------------------------
                        Centaur Pharmaceuticals INC., Sunnyvale

8       COMPLAINTS

8.1     CENTAUR shall be kept informed by LUNDBECK about all complaint LUNDBECK
        may receive concerning the quality of the Products and vice versa. For
        the entire shelf-life of the Products CENTAUR undertakes to answer all
        enquiries by LUNDBECK regarding Products and fully assist and cooperate
        with LUNDBECK in relation to any complaints about the quality of
        Products.

                                                                        Page 4/8




<PAGE>
 

       9       MISCELLANEOUS


       9.1     Terms and conditions for the price and supply of the Products and
               the term of the contactual relationship for the Products have
               been agreed by the Parties in a separate Supply Agreement.

       9.2     This Agreement, is written in two original copies, one for each
               party, and is valid as long as LUNDBECK continues purchasing the
               Products from CENTAUR.


       Copenhagen,

       H. LUNDBECK A/S
 
                                    Vice President
                                    Regulatory Affairs and
                                    Quality Assurance
       -------------------------    -----------------        -------
       Name Jacques Mascaro        Title                    Date 



       Sunnyvale,
       CENTAUR PHARMACEUTICALS INC.


       -------------------------    -----------------        -------
       Name                         Title                    Date 

                                                                        Page 5/8
<PAGE>
 
                                  APPENDIX I

                             To Agreement between
       Centaur Pharmaceuticals INC. and H. Lundbeck A/S dated 1996-10-11
               concerning Manufacture and Analysis under Contract

Product:          [to be completed]/R/ Tablets
- --------

Delivered as:     Bulk
- -------------

Production site:  [to be completed]
- ----------------

                                                                        Page 6/8
<PAGE>
 
<TABLE> 

<S>                                            <C> 
Solubility:

                                               Average concentration=SD
                                               ------------------------
      Water pH 6.0:                                    
      Ethanol:                                           [*]
      Ethyl acetate                            
      Phosphate buffer pH 2.0                  

Specifications:

      Primary Chemical Name                    
      Other Chemical Name                      
      Other Name                                         [*]
      Chemical Formula                         
      Molecular Weight                         
      Melting Point                            

Preliminary specification on particle
size distribution
(mean diameter, laser light diffraction):

      d 10%, more than:                        
      d 50%, interval:                         [*]
      d 95%, less than:                        

Attributes:

      Appearance                               
      Water Content                            
      Identity by FTTR                                   [*]
              by Ptoton NMR                    
      Purity by HPLC                           
      Melting Point                            
                                               
                                               
                                               
      Heavy Metals as Lead                     

      Elemental Analysis                       Target Percentages=SD
                                               ---------------------
             Carbon                            
             Hydrogen                                    [*]
             Nitrogen                          
             Oxygen                            
</TABLE> 

                                                                        Page 7/8
<PAGE>
 
Copenhagen,
H. LUNDBECK A/S



                           Vice President
                           Regulatory Affairs and
                           Quality Assurance
- ---------------------      -------------------------     ----------------------
Name Jacques Mascaro       Title                         Date





Sunnyvale,
CENTAUR PHARMACEUTICALS INC.





- ---------------------      -------------------------     ----------------------
Name                       Title                         Date























                                                                        Page 8/8
<PAGE>
 
                         Centaur Pharmaceuticals, Inc.
                             484, Oakmead Parkway
                              Sunnyvale, CA 94086
                                      USA




H. Lundbeck A/S
9, Ottiliavej
DK-2500 Copenhagen-Valby
Denmark                                                          31 October 1996



Gentlemen:

This letter will serve to verify that the compound known as CPI-1189 referred to
in the "Development, Patent and Trademark/Know-How Licensing and Supply 
Agreement - CPI-1189" between the parties to this letter and dated the same date
as this letter is the chemical formula [*] with a chemical structure as follows:




                    [DIAGRAM OF CHEMICAL COMPOUND OMITTED]



                                  Very truly yours,

                                  Centaur Pharmaceuticals, Inc.
                                  


                                  /s/ Brian Frenzel
                                  -------------------------------               
                                  Brian Frenzel
                                  President




Agreed:


H. Lundbeck A/S


/s/ Erik Sprunk-Jansen
- ------------------------
Erik Sprunk-Jansen
President




/s/ Ole Antonsen
- ------------------------
Ole Antonsen
Senior Vice President



Date: 31.10.96
      __________________


<PAGE>
 
                         Centaur Pharmaceuticals, Inc.
                             484, Oakmead Parkway
                              Sunnyvale, CA 94086
                                      USA


                                                                                
                                                          As of October 31, 1996



H. Lundbeck A/S
9 Ottiliavej
DK-2500 Copenhagen-Valby
Denmark




Gentlemen:

This letter will confirm the following amendments to the "Development, Patent 
and Trademark/Know-How Licensing and Supply Agreement - CPI-1189" (the "License 
Agreement") between the parties to this letter and dated the same date as this 
letter using the definitions and terms of the License Agreement:

Section 2.3 shall be changed by adding to the fourth line of this section, after
"Kuwait" and before "Pakistan" a comma.

Section 2.4 (b) shall be changed by adding to the twentyfourth line after 
"...Basic Royalty for Licensed Product" and before "Should Lundbeck not",
"should the Additional Compound be patent protected the royalty paid on Net
Sales of the Additional Compound shall be at the Basic Royalty for the duration
of such patent (reduced, if appropriate, for Substantial Competition rebates
under Section 5.9 and the creditability of certain payments under Section 4.2)"

Section 2.5, second word, "outside" shall be changed to "Outside".

In Section 5.10 (b) and wherever otherwise relevant all references to 
"Trademark Royalty" as such term is used and defined in the License Agreement 
will be deemed, to be references to "Know-How/Trademark Royalty" with regard to 
countries which are not part of the European Union but included in the 
Territory.

Section 6.2, the word "(Project-Leader)" in the seventh line shall be changed to
"(Project Leader)", i.e. written without hyphen.




<PAGE>
 
Section 6.5 D shall be changed by adding to the twelfth line after "calculated 
using the" and before "the prime rate" "simple average of" and by changing in
the thirteenth line after "CA, USA" and before "If the wrongful" "on the date of
remittance" to "on the date originally due and the date of remittance".

Section 6.8 shall be changed by changing "Section 6.10 mutatis mutandis" in the 
last line after "applying" to "the principles of Section 6.10 with the necessary
changes".

Section 7.7 C shall be changed by changing in the twelfth line after "the prime 
rate" and before "interest" "if" to "of".

Section 7.13 shall be changed by amending the fourth line after "or Bulk 
Substance," to "but if Lundbeck can establish that such improvement can be used 
independent from Centaur Know-How and/or Synthesis Data Lundbeck shall in 
addition be free to license its said improvements to independent Third Parties,
in so far as that does not involve disclosure of Centaur's Know-How and/or
Synthesis Data that are still secret" and by deleting", unless Lundbeck can
establish that such improvements can be used independent from Centaur Know-How
and/or Synthesis Data and, if so, the parties shall, if Centaur so wishes, in
good faith negotiate terms for a license to Centaur of such improvements".

Section 7.20 (b) shall be changed by inserting in the fourth last line after 
"fifty" and before "(50%)" "percent".

Section 8.5 shall be changed by inserting in the fifth line after "Centaur 
Pharmaceuticals, Inc." and before "CA, USA" "Sunnyvale".

Section 11.1 (b) shall be changed in the fourth line by deleting "." after "26" 
and in the sixth line by deleting "." after 3".

Section 11.5 shall be changed by amending line twenty after "entering the case 
than" with the following: "the principles of Section 11.6 (i) shall apply with 
the necessary changes" and by deleting "Section 11.6 (i) shall apply mutatis 
mutandis".

Section 11.6 shall be changed by amending line fifteen after "hereunder" and
before "provided that" with the following: "from countries where such Third
Party Claim claims infringement" and by deleting "from any country in the
Territory" and in the last line by changing "the said" to "any".



                                       2
<PAGE>
 
Section 11.7 shall be amended by inserting in line seven after "Centaur 
hereunder" and before "shall be reduced" "from countries where such Third Party 
Claim claims infringement" and in line nine by deleting after "Date of 
Execution" and before "knowledge" "no".


                                    Very truly yours,

                                    Centaur Pharmaceuticals, Inc.




                                    /s/ Brian Frenzel
                                    ------------------------------
                                    Brian Frenzel
                                    President

AGREED

H. Lundbeck A/S



/s/ Erik Sprunk-Jansen
- -----------------------------
Erik Sprunk-Jansen
President



/s/ Ole Antonsen
- -----------------------------
Ole Antonsen
Senior Vice President



                                       3

<PAGE>
 
                                                                   Exhibit 10.18


                                 LICENSE AGREEMENT


 

     THIS AGREEMENT is effective as of the 15th day of January, 1998 by and
between CENTAUR PHARMACEUTICALS, INC., a corporation organized and existing
under the laws of the State of Delaware and having its principal office at 484
Oakmead Parkway, Sunnyvale, California 94086 ("CENTAUR"), and CUTANIX
CORPORATION, a corporation organized and existing under the laws of the State of
Delaware, and having its principal office at 484 Oakmead Parkway, Sunnyvale,
California 94086("CUTANIX").



     WHEREAS, CENTAUR possesses technology and intellectual property, including
patent rights, which have applications in the FIELD OF USE;



     WHEREAS, CUTANIX wishes to obtain licenses under CENTAUR PATENT RIGHTS and
CENTAUR KNOW-HOW for the FIELD OF USE.



     NOW, THEREFORE, in consideration of the premises and the mutual promises
set forth herein, CUTANIX and CENTAUR agree as follows:

- --------------------------------------------------------------------------------
[*] - Confidential treatment is being sought with respect to this portion of
      this agreement. This portion has been omitted from this filing and has
      been filed separately with the Securities and Exchange Commission.
<PAGE>
 
     1.1  AFFILIATE means any corporation or business entity which owns or
controls CENTAUR or CUTANIX, or which CENTAUR or CUTANIX owns or controls or
which is under common control with CENTAUR or CUTANIX, as evidenced by ownership
of at least fifty percent (50%), directly or indirectly, of the outstanding
stock or other indicia of ownership eligible to vote for the Board of Directors
or other governing body.



     1.2  BANKRUPTCY PROCEEDING means a party (a) is subject to any voluntary or
involuntary proceeding under the United States Bankruptcy Code or similar
statute providing protection against creditors which is not discharged within 30
days after the filing thereof, (b) voluntarily admits an inability to pay its
creditors, (c) is subject to the appointment of a receiver for its assets, which
appointment is not discharged within 30 days, or (d) becomes insolvent.



     1.3  CENTAUR KNOW-HOW means any information or data not generally known
which are, as of the effective date of this Agreement, owned by or licensed by
CENTAUR (with the right to grant sublicenses) or which are in the future owned
by or licensed by CENTAUR (with the right to grant sublicenses) including, but
not limited to, procedures for experiments and tests and other protocols,
results of experimentation and testing, chemical or biological materials,
interpretation and insights as to the nature and activity of various compounds
and 

                                       2
<PAGE>
 
other scientific information, any of which are necessary in order to
manufacture, use, develop, sell or seek approval to market LICENSED PRODUCT.



     1.4  CENTAUR PATENT RIGHTS means (i) all patents and patent applications
and their foreign equivalents filed by CENTAUR as sole or joint owner (including
joint ownership with CUTANIX) and any other existing or future United States or
foreign patent or patent applications which CENTAUR owns or may own or under
which CENTAUR has acquired or acquires licensing rights and has the right to
sublicense those rights to CUTANIX, including all patents and patent
applications listed in Schedule A, and (ii) any divisions, continuations, or
continuations-in-part or issued patents of the patent applications set forth
above, including any reissue, reexamination or extension of such patents, any
extended or restored term, and any confirmation patent, registration patent, or
patent of addition.



     1.5  CHANGE IN CONTROL means (a) prior to an initial public offering by
CUTANIX, the date that a person (as such term is used in Sections 13(d) and
14(d) of the Securities Exchange Act of 1934, as amended from time to time or
any successor thereto (the "Exchange Act")) has become the beneficial owner (as
defined in Rule 13d-3 under the Exchange Act) of fifty percent (50%) or more of
the voting power of all securities of CUTANIX then outstanding 

                                       3
<PAGE>
 
(not including any person or entity which becomes a stockholder of the
Corporation prior to January 31, 1998 or any AFFILIATE of such persons and
entities); (b) after the initial public offering by CUTANIX, (i) the date of
public announcement that a person has become the beneficial owner of thirty
percent (30%) or more of the voting power of all securities of CUTANIX then
outstanding (not including any person or entity which becomes a stockholder of
the Corporation prior to January 31, 1998 or any AFFILIATE of such persons or
entities) or (ii) the date of the commencement of a tender offer or tender
exchange by any person, if upon the consummation thereof such person would be
the beneficial owner of thirty percent (30%) or more of the voting power of all
securities of CUTANIX then outstanding; or (c) either before or after an initial
public offering by CUTANIX, (i) the date on which individuals who constituted
the Board of Directors of CUTANIX on the date this Agreement was adopted cease
for any reason to constitute a majority thereof, provided that any person
becoming a director subsequent to such date whose election or nomination was
approved by at least a majority of such incumbent Board of Directors shall be
considered as though such person were an incumbent director, (ii) the
dissolution of CUTANIX; (iii) a sale or other disposition or the last sale or
other disposition to occur in a series of sales and/or other dispositions within
any twelve (12) month period ("Serial Sales") by CUTANIX of assets which, in the
case of Serial Sales, as of the beginning of such twelve (12) month period,
account for more than seventy five 

                                       4
<PAGE>
 
percent (75%) of the total assets or seventy-five percent (75%) of the revenue
of the CUTANIX, as determined in accordance with generally accepted accounting
principles; provided, however, that no sale or disposition of assets or stock
shall be taken into account to the extent that that proceeds of such sale or
disposition (whether in cash or in-kind) are reinvested or are, in the case
of proceeds received in-kind, used in the ongoing conduct of CUTANIX, provided
further that such a reinvestment shall not be deemed to have occurred unless
made within twelve (12) months of such sale or disposition and provided further
that, the term reinvestment shall include, inter alia, the use of proceeds to
                                           ----------
repay debt incurred in connection with the operation of the business in which
the assets sold or disposed of were used; or (iv) any other event which the
Board determines, in its discretion, would materially alter the structure of
CUTANIX or its ownership.



     1.6  COMBINATION PRODUCT means any LICENSED PRODUCT sold in combination
with one or more other products upon which royalties must be paid to a third
party relating to the SKIN.



     1.7  CUTANIX KNOW-HOW means any information and data not generally known
which are, as of the effective date of this Agreement, owned by or licensed by
CUTANIX (with the right to grant sublicenses) or which are in the future owned
by or 

                                       5
<PAGE>
 
licensed by CUTANIX (with the right to grant sublicenses) including, but
not limited to, procedures for experiments and tests and other protocols,
results of experimentation and testing, chemical or biological materials,
interpretation and insights as to the nature and activity of various compounds
and other scientific information.



     1.8  CUTANIX PATENT RIGHTS means (i) all patents and patent applications
and their foreign equivalents filed by CUTANIX as sole or joint owner (including
joint ownership with CENTAUR) and any other existing or future United States or
foreign patents or patent applications which CUTANIX owns or may own or under
which CUTANIX acquires licensing rights and has the right to sublicense those
rights to CENTAUR, and (ii) any divisions, continuations, or continuations-in-
part or issued patents of the patent applications set forth above, including any
reissue, reexamination or extension of such patents, any extended or restored
term, and any confirmation patent, registration patent, or patent of addition.

 

     1.9  DATE OF FIRST COMMERCIAL SALE means, with respect to a given LICENSED
PRODUCT, the date on which CUTANIX first sells a LICENSED PRODUCT to an
independent third party for monetary or other value (e.g., a barter arrangement)
consideration. LICENSED PRODUCT used in clinical trials, given for promotional
or marketing purposes, or given free to customers by CUTANIX sales

                                       6
<PAGE>
 
representatives, shall not be considered a commercial sale.



     1.10  FIELD OF USE means the following:

     (a)   Improvement or maintenance of the aesthetic appeal of the SKIN; or

     (b)   The prevention or treatment of any condition or disorder of the SKIN
listed in paragraphs 232 through 247 of the Merck Manual, sixteenth edition; or

     (c)   The prevention or treatment of any adverse condition of the SKIN
resulting from (i) the direct interaction of the SKIN with any object,
substance, or energy field external to the body or (ii) the exposure of the
SKIN to any adverse external environmental condition.



     1.11  LICENSED PRODUCT means any bulk or finished product applied directly
to the SKIN either topically or intradermally which incorporates CENTAUR PATENT
RIGHTS and/or CENTAUR KNOW-HOW and which makes claims and is marketed only for
the FIELD OF USE.

 

     1.12  NET SALES means

     (a) the gross amount of sales of LICENSED PRODUCT to third parties less:

         (i)     trade and quantity discounts actually allowed;

         (ii)    returns, rebates and allowances;

                                       7
<PAGE>
 
         (iii)   retroactive price reductions;

         (iv)    sales commissions to independent agents;

         (v)     the costs of devices for dispensing or administering the
LICENSED PRODUCT or of diluents or similar exogenous materials (for none of
which the customer is being charged) which accompany the LICENSED PRODUCT as it
is sold; and

         (vi)    with regard to sales in the United States, five percent (5%) of
the amount invoiced to cover cash discounts, sales or excise taxes,
transportation and insurance charges; and with regard to sales outside the
United States ten percent (10%) to include the above and additional special
packaging, duties, and other governmental charges; and

     (b) With respect to sales of COMBINATION PRODUCT, NET SALES shall be
calculated on the basis of the sales price of the same weight of LICENSED
PRODUCT (being sold without any other active ingredient) which would result in
an obligation to pay royalties to a third party, if such exists. If LICENSED
PRODUCT is not sold alone without such other active ingredient, NET SALES shall
be calculated by multiplying NET SALES of COMBINATION PRODUCT by a fraction, the
numerator of which shall be the inventory cost to CUTANIX of the sole active
ingredient of LICENSED PRODUCT in the COMBINATION PRODUCT and the denominator of
which shall be the inventory cost to CUTANIX of all active ingredients contained
therein which would result in an obligation to pay royalties. In no event shall
the fraction be less than 

                                       8
<PAGE>
 
one over the number of such active ingredients in the COMBINATION PRODUCT.



     1.13  SKIN means that part of the human anatomy consisting of the dermis,
the epidermis, and the appendages of the skin, to wit, the nails, the hair and
hair follicles, the sudoriferous and sebaceous glands and their ducts, all as
defined in Gray's Anatomy. Gray's Anatomy specifies that the skin is a
contiguous organ covering the exterior of the body which terminates in a
boundary with mucous membrane at the following orifices: eyelids, nostrils,
mouth, anus, urethra, and vagina.  Accordingly, SKIN does not include any
epithelial tissue beyond the skin-mucosa boundary.



     1.14  TERRITORY means all countries and territories of the world.



                                 ARTICLE 2 - LICENSE GRANT
                                 -------------------------

     2.1   CENTAUR grants to CUTANIX an exclusive license to and under CENTAUR
PATENT RIGHTS AND CENTAUR KNOW-HOW to make, have made, use and sell LICENSED
PRODUCTS, either individually or as part of a COMBINATION PRODUCT, in the
TERRITORY. CUTANIX shall have the right to grant sublicenses for all uses of the
license granted to CUTANIX hereunder, provided that all sublicensees must
expressly agree in writing to be bound by the terms and conditions of this
Agreement.  Notwithstanding anything else 

                                       9
<PAGE>
 
herein to the contrary, the parties agree that (i) CENTAUR may require that
CUTANIX suspend or cease the production and/or marketing of any LICENSED PRODUCT
if CENTAUR reasonably believes that there are health and/or safety issues with
respect to such LICENSED PRODUCT which are not properly addressed in accordance
with drug industry standards, in the case of drugs, or cosmetic industry
standards, in the case of cosmetics, (ii) the license granted hereunder shall
not include any compounds, data or information to which CENTAUR has granted
third parties exclusive rights prior to the date of this Agreement (as more
fully described in Section 2.5, below) and (iii) the license will not extend to
any compound which CENTAUR is developing as described in Section 2.5 below.
CENTAUR represents and warrants that as of the date hereof, only one compound is
subject to an exclusive license to a third party. However, it is anticipated
that additional compounds will become subject to an exclusive license to third
parties in the future.



     2.2  (a)  In consideration of the license granted by CENTAUR to CUTANIX
under Section 2.1 and for the agreement of CENTAUR to the terms hereof, CUTANIX
shall issue to CENTAUR 600,000 shares of CUTANIX common stock, par value $.01
per share pursuant to the Stock Purchase Agreement of even date herewith between
CUTANIX and CENTAUR (the "Stock Purchase Agreement") and shall pay to CENTAUR
royalties subsequent to a CHANGE IN CONTROL as follows: (i) with respect to
prescription products, a royalty 

                                       10
<PAGE>
 
of [*] on its annual NET SALES of LICENSED PRODUCTS beginning on
the DATE OF FIRST COMMERCIAL SALE by CUTANIX of such LICENSED PRODUCT on a
country by country basis, not including those LICENSED PRODUCTS for which either
[A] the DATE OF FIRST COMMERCIAL SALE by CUTANIX occurred, or [B] the first
phase of human efficacy trials was completed, prior to the effective date of
such CHANGE IN CONTROL; and (ii) with respect to products sold without
prescription, a royalty of [*] on its annual NET
SALES of LICENSED PRODUCTS beginning on the DATE OF FIRST COMMERCIAL SALE by
CUTANIX of such LICENSED PRODUCT on a country by country basis, not including
those LICENSED PRODUCTS for which either [A] the DATE OF FIRST COMMERCIAL SALE
by CUTANIX occurred, or [B] all required pre-marketing clinical testing had been
completed, prior to the effective date of the CHANGE IN CONTROL.



          (b) Royalties will be payable on a country by country basis as set
forth in Section 7.1 hereof. The royalty will be payable for the term of CENTAUR
PATENT RIGHTS (but only in the event that the sale of LICENSED PRODUCT would,
but for this Agreement, infringe a valid claim in an issued or pending patent of
CENTAUR PATENT RIGHTS).



          (c) In the event CUTANIX pays a royalty to a third party in order to
continue selling LICENSED PRODUCT in any country because the LICENSED PRODUCT
infringes the claims of a 

                                       11
<PAGE>
 
patent of such third party (other than as contemplated by Section 2.2(h),
below), the dollar amount of royalty payable to CENTAUR on NET SALES in that
country hereunder, if any, shall be reduced by the lesser of (i) fifty percent
(50%) of the dollar amount of royalty so paid to the third party or (ii) the
full amount of the royalty otherwise payable by CUTANIX to CENTAUR with respect
to sales of such LICENSED PRODUCT in such country.



          (d) CUTANIX shall notify CENTAUR at least three (3) months in
advance of the expected DATE OF FIRST COMMERCIAL SALE of a LICENSED PRODUCT in a
country subject to a royalty payable under this Agreement.



          (e) All payments required under this Section 2.2 shall be made by
check or by wire transfer to an account designated by CENTAUR, at CENTAUR's
option.



          (f) No royalties shall be due and payable for sales of LICENSED
PRODUCT occurring after the expiration of this Agreement under Article 9 hereof.
For the purpose of clarification, this Section 2.2(f) shall not apply if this
Agreement is terminated under Section 10.1 hereof.



          (g) Royalties shall be payable only once with respect to the same
unit of LICENSED PRODUCT irrespective of the number of claims under CENTAUR
PATENT RIGHTS which cover such unit of 

                                       12
<PAGE>
 
LICENSED PRODUCT.



          (h) In the event that the sale by CUTANIX of LICENSED PRODUCT
results in an obligation by CENTAUR to pay royalties to a third party, CUTANIX
shall pay such third party royalties, provided, however that one-half of the
amount of such third party royalties paid by CUTANIX shall be deducted from any
royalties otherwise payable by CUTANIX to CENTAUR hereunder.



     2.3  CUTANIX grants to CENTAUR an exclusive, royalty-free license to
all enhancements, improvements and inventions derived by CUTANIX or its agents
from the use of CENTAUR PATENT RIGHTS or CENTAUR KNOW-HOW and to all other
CUTANIX PATENT RIGHTS and CUTANIX KNOW-HOW for use in all fields other than the
FIELD OF USE.



     2.4  Notwithstanding anything else in this Agreement to the contrary,
the parties agree that CENTAUR will own any and all patent rights to any and all
patented compositions of matter discovered by CUTANIX through the use of CENTAUR
PATENT RIGHTS and CENTAUR KNOW-HOW, as contemplated by this Agreement.



     2.5  Notwithstanding anything else to the contrary set forth herein,
all CENTAUR compounds which CENTAUR is legally required to exclude from this
Agreement due to rights granted to Astra AB ("Astra") pursuant to the
Development, License and Marketing 

                                       13
<PAGE>
 
Agreement between Astra and Centaur dated June 26, 1995, and the amendment
thereto dated July 8, 1997 (the "Astra Agreement"), shall be outside the scope
of the license granted to CUTANIX hereunder. With respect to other CENTAUR
compounds, or compounds licensed or licensable to CENTAUR by CUTANIX under this
Agreement, the rights of either CENTAUR or CUTANIX to develop a particular
compound shall be exclusive and shall be determined when either party declares
by written notice to the other party signed by its authorized representative
that it has decided to undertake GLP toxicology testing for the compound and to
then proceed with human clinical trials for such compound, subject to acceptable
GLP toxicology results and requisite regulatory approvals (the "Notice of
Declaration")/1/. Upon receipt of a Notice of Declaration, the recipient shall
cease all research and development efforts with respect to the compound that is
the subject of the Notice of Declaration (except to the extent that the
recipient's assistance is requested by the declaring party and the recipient
elects to provide such assistance) and the party who delivered the Notice of
Declaration shall have the exclusive right to develop the compound into a
commercial product. If a party that delivers a Notice of Declaration either (i)
fails to commence GLP toxicology tests for the compound within three (3) months
after such delivery, (ii) at any time

_________________________________
/1/ Notwithstanding anything else herein to the contrary, if a compound for
which CUTANIX delivers a Notice of Declaration is subject to Astra's rights of
first refusal under the Astra Agreement, the Notice of Declaration will not be
effective until Astra's rights to the compound expire. CENTAUR will use
reasonable efforts to keep CUTANIX informed of those compounds as to which Astra
has rights of first refusal or to which rights are granted to Astra.

                                       14
<PAGE>
 
after commencing GLP toxicology testing on the compound, ceases to conduct
development activities with reasonable diligence during a period of three (3)
consecutive months or more, or (iii) terminates its efforts to develop the
compound, then the compound shall be returned to the general pool of CENTAUR or
CUTANIX compounds (the "Compound Pool") which either party may have access to,
pending delivery of a subsequent Notice of Declaration by either party. The
party that delivered a Notice of Declaration with respect to a particular
compound must give written notice within thirty (30) days of the occurrence of
any of the events described in clauses (i)-(iii), above. A party who delivers a
Notice of Declaration with respect to a particular compound which is
subsequently returned to the Compound Pool, for any reason, (a) may not issue a
new Notice of Declaration with respect to such compound for a period of six (6)
months after the compound is returned to the Compound Pool and (b) must share
with the other party all of the information and data in its possession or
control related to the work conducted by it with respect to such compound. For
the purpose of this Section 2.5, the authorized representative of Cutanix shall
be Charles R. Engles and the authorized representative for Centaur shall be
Brian D. Frenzel. Either party may change such authorized representative by
delivery of written notice to the other party. In addition to the foregoing, if
either party enters into an agreement with a third party to develop a compound
under which the committed funding therefor is at least [*] then such
compound will 

                                       15
<PAGE>
 
be removed from the Compound Pool, provided that the parties will promptly
notify each other in writing of the execution of such agreements. If such
development program is discontinued for any reason the compound will be returned
to the Compound Pool.



         ARTICLE 3 - PROTECTION AND VALIDITY OF CENTAUR PATENT RIGHTS
         ------------------------------------------------------------

     3.1  CENTAUR represents and warrants to CUTANIX that as of the effective
date of this Agreement it has the right and requisite corporate authority to
grant the license granted under Section 2.1 hereof and the right to provide the
CENTAUR KNOW-HOW to CUTANIX. CENTAUR does not represent and warrant that the
CENTAUR PATENT RIGHTS are or will be valid or that the CENTAUR PATENT RIGHTS or
the CENTAUR KNOW-HOW will not infringe the rights of third parties or that the
manufacture, use or sale of LICENSED

                                       16
<PAGE>
 
PRODUCT is not or will not be an infringement of the rights of third parties.



     3.2  CENTAUR agrees to prosecute with reasonable diligence and maintain at
its expense the CENTAUR PATENT RIGHTS which CENTAUR owns and licenses under this
Agreement. CENTAUR shall give notice to CUTANIX of any decision to cease its
prosecution or maintenance of any CENTAUR PATENT RIGHT, other than those which
are exclusively licensed to a third party, or which in the opinion of CENTAUR'S
patent counsel, cannot be used to support claims to either the composition or
synthesis of a chemical entity or to a method of use or treatment in the FIELD
OF USE. If CENTAUR elects not to prosecute or maintain any CENTAUR PATENT RIGHT,
or if CENTAUR should be subject to a BANKRUPTCY PROCEEDING, CUTANIX may, but is
not required to, prosecute or maintain the CENTAUR PATENT RIGHTS licensed to it
hereunder. If CUTANIX elects to continue prosecution or maintenance, CENTAUR
shall execute such documents and perform such acts, at CUTANIX's expense, as may
be reasonably necessary for CUTANIX to continue such prosecution or maintenance.
All expenses and costs incurred by CUTANIX to continue prosecution and
subsequent maintenance shall be creditable against royalties due under this
Agreement.



     3.3  CENTAUR and CUTANIX agree to take reasonable actions, as provided by
Sections 3.4 and 3.5 hereof, in the name 

                                       17
<PAGE>
 
of CENTAUR, CUTANIX or both to protect the CENTAUR PATENT RIGHTS licensed to
CUTANIX under this Agreement against any third party who either infringes the
CENTAUR PATENT RIGHTS or brings any claims or proceedings against CENTAUR or
CUTANIX for infringement of the third party's patents in relation to the use and
exploitation of the CENTAUR PATENT RIGHTS.



     3.4  In the event CENTAUR institutes an action against third party
infringers or takes appropriate action to defend CENTAUR PATENT RIGHTS, CUTANIX
hereby agrees to cooperate fully with CENTAUR and any recovery obtained by
CENTAUR as a result of such proceeding or other actions, whether obtained by
settlement or otherwise, shall be retained by CENTAUR except that CENTAUR shall
pay to CUTANIX any expenses incurred by CUTANIX relating to such action;
provided that CUTANIX, at its option, may elect to participate in any action and
in such event CUTANIX shall share with CENTAUR the expenses of the action and
CUTANIX and CENTAUR shall share any award, after reimbursement of each party's
contribution to the expenses of such action. CUTANIX shall pay to CENTAUR any
royalty due on damages related to lost sales.



     3.5  If, within sixty (60) days of becoming aware of the infringement
or threatened infringement of CENTAUR PATENT RIGHTS, CENTAUR decides not to
institute an infringement suit or take other appropriate action to protect
CENTAUR PATENT RIGHTS in accordance with Section 3.4, CUTANIX shall have the
right to 

                                       18
<PAGE>
 
institute such suit or other appropriate action at its own expense in the name
of CENTAUR or CUTANIX or both. In such event, CENTAUR shall cooperate fully with
CUTANIX in its efforts to protect CENTAUR PATENT RIGHTS, provided, however, that
CUTANIX shall bear the reasonable expenses of CENTAUR. Any recovery obtained by
CUTANIX as a result of such proceeding, by settlement or otherwise, shall be the
property of CUTANIX, provided, however, that CUTANIX shall pay to CENTAUR any
expenses incurred by CENTAUR in connection with such action and the applicable
royalty due to CENTAUR under Section 2.2 to the extent that the recovery is
attributable to sales lost by CUTANIX.



     3.6  CENTAUR shall promptly give notice to CUTANIX of the grant,
lapse, revocation, surrender, invalidation or abandonment of any CENTAUR PATENT
RIGHTS, other than those which are exclusively licensed to a third party or
which, in the opinion of CENTAUR'S patent counsel, cannot be used to support
claims to either the composition or synthesis of a chemical entity or to a
method of use or treatment within the FIELD OF USE.  Each party shall notify the
other of any infringement of or challenge to the validity or enforceability of
any patent within the CENTAUR PATENT RIGHTS promptly after learning of such and
shall provide the other party with any available evidence of such infringement
or challenge.



     3.7  The parties hereto shall cooperate with each other 

                                       19
<PAGE>
 
in gaining patent term extension where applicable to the CENTAUR PATENT RIGHTS.



          ARTICLE 4 - PROTECTION AND VALIDITY OF CUTANIX PATENT RIGHTS
          ------------------------------------------------------------
                                        
     4.1  CUTANIX represents and warrants to CENTAUR that as of the effective
date of this Agreement it has the right and corporate authority to grant the
license granted under Section 2.3 hereof and the right to provide the CUTANIX
KNOW-HOW to CENTAUR.



     4.2  CUTANIX agrees to prosecute with reasonable diligence and maintain at
its expense the CUTANIX PATENT RIGHTS which CUTANIX owns and licenses to CENTAUR
under this Agreement. CUTANIX shall give notice to CENTAUR of any decision to
cease its prosecution or maintenance of any CUTANIX PATENT RIGHT. If CUTANIX
elects not to prosecute or maintain any CUTANIX PATENT RIGHT, or if CUTANIX
should be subject to a BANKRUPTCY PROCEEDING, CENTAUR may, but is not required
to, prosecute or maintain the CUTANIX PATENT RIGHTS licensed to it hereunder. If
CENTAUR elects to continue prosecution or maintenance, CUTANIX shall execute
such documents and perform such acts, at CENTAUR'S expense, as may be reasonably
necessary for CENTAUR to continue such prosecution or maintenance.



     4.3  CENTAUR and CUTANIX agree to take reasonable actions, as provided by
Sections 4.4 and 4.5 hereof, in the name 

                                       20
<PAGE>
 
of CENTAUR, CUTANIX or both to protect the CUTANIX PATENT RIGHTS licensed to
CENTAUR under this Agreement against any third party who either infringes the
CUTANIX PATENT RIGHTS or brings any claims or proceedings against CENTAUR or
CUTANIX for infringement of the third party's patents in relation to the use and
exploitation of the CUTANIX PATENT RIGHTS.



     4.4  In the event CUTANIX institutes an action against third party
infringers or takes appropriate action to defend CUTANIX PATENT RIGHTS, CENTAUR
hereby agrees to cooperate fully with CUTANIX and any recovery obtained by
CUTANIX as a result of such proceeding or other actions, whether obtained by
settlement or otherwise, shall be retained by CUTANIX except that CUTANIX shall
pay to CENTAUR any expenses incurred by CENTAUR relating to such action;
provided that CENTAUR, at its option, may elect to participate in any action and
in such event CENTAUR shall share with CUTANIX the expenses of the action and
CENTAUR and CUTANIX shall share any award, after reimbursement of each party's
contribution to the expenses of such action.



     4.5  If, within sixty (60) days of becoming aware of the infringement
or threatened infringement of a CUTANIX PATENT RIGHT, CUTANIX decides not to
institute an infringement suit or take other appropriate action to protect
CUTANIX PATENT RIGHTS in accordance with Section 4.4, CENTAUR shall have the
right to institute such suit or other appropriate action at its own 

                                       21
<PAGE>
 
expense in the name of CENTAUR or CUTANIX or both. In such event, CUTANIX shall
cooperate fully with CENTAUR in its efforts to protect CUTANIX PATENT RIGHTS,
provided, however, that CENTAUR shall bear the reasonable expenses of CUTANIX.
Any recovery obtained by CENTAUR as a result of such proceeding, by settlement
or otherwise, shall be the property of CENTAUR, provided, however, that CENTAUR
shall pay to CUTANIX any expenses incurred by CUTANIX in connection with such
action.



     4.6  CUTANIX shall promptly give notice to CENTAUR of the grant, lapse,
revocation, surrender, invalidation or abandonment of any CUTANIX PATENT RIGHTS.
Each party shall notify the other of any infringement of or challenge to the
validity or enforceability of any patent within the CUTANIX PATENT RIGHTS
promptly after learning of such and shall provide the other party with any
available evidence of such infringement or challenge.



     4.7  The parties hereto shall cooperate with each other in gaining
patent term extension where applicable to the CUTANIX PATENT RIGHTS.


                     ARTICLE 5   - TRANSFER OF INFORMATION
                     -------------------------------------
                                        
     5.1  During the term of this Agreement, CUTANIX will disclose 

                                       22
<PAGE>
 
to CENTAUR on an ongoing basis all enhancements and improvements to the CENTAUR
KNOW-HOW and CENTAUR PATENT RIGHTS licensed hereunder, or inventions derived
therefrom, discovered or derived by CUTANIX and its agents, and all other
CUTANIX KNOW-HOW and CUTANIX PATENT RIGHTS.



     5.2  During the term of this Agreement, CENTAUR will disclose to CUTANIX on
an ongoing basis all CENTAUR KNOW-HOW and CENTAUR PATENT RIGHTS licensed to
CUTANIX hereunder.


                          ARTICLE 6 - CONFIDENTIALITY
                          ---------------------------

     6.1  All CENTAUR KNOW-HOW or other confidential information which is
received by CUTANIX and CUTANIX KNOW-HOW or other confidential information which
is received by CENTAUR either prior to or during the term of this Agreement
shall be maintained in confidence by the recipient and shall not be disclosed to
any other person, firm, or agency, governmental or private, without the prior
written consent of the other party during the term of the Agreement and for a
seven (7) year period thereafter except to the extent that the CENTAUR KNOW-HOW
or information or CUTANIX KNOW-HOW or information:

     6.1.1  is known by recipient at the time of its receipt as documented in
written records, provided that such information was not obtained by the
recipient from a third party that received the information in confidence from
the disclosing party, or

                                       23
<PAGE>
 
     6.1.2  is properly in the public domain, or

     6.1.3  is subsequently disclosed to a party by a third party who may
lawfully do so, or

     6.1.4  is developed independently of CUTANIX KNOW-HOW or CENTAUR KNOW-HOW
or information received from the discloser, as demonstrated by written records,
or

     6.1.5  is required to be disclosed to governmental agencies in order to
gain approval to sell LICENSED PRODUCT, provided, however, that when permitted
by local law, CUTANIX or CENTAUR shall take reasonable steps to protect the
confidentiality of the information submitted to government agencies, or

     6.1.6  is necessary to be disclosed to sublicensees, agents, consultants,
AFFILIATES and/or other third parties for the research and development and/or
marketing of LICENSED PRODUCT under this Agreement, which entities first agree
to be bound by the confidentiality obligations contained in this Agreement, or

     6.1.7  is required to be disclosed pursuant to a subpoena or order of
court, governmental agency, or other tribunal, provided that the recipient will
provide the disclosing party with prompt written notice of such compelled
disclosure and will assist the disclosing party, at the disclosing party's cost
and expense, in all efforts by the disclosing party to prevent and/or limit the
scope of the disclosure of the information which is subject to such compelled
disclosure, or

     6.1.8  is reasonably required to be disclosed in order 

                                       24
<PAGE>
 
for the recipient to enforce provisions of this Agreement.


     The recipient of any such information will have the burden of establishing
that any of the foregoing exceptions are applicable.



     6.2  It is understood that each party may disclose confidential information
with the prior written consent and approval of the other party.



     6.3  Each party acknowledges that all confidential information and CENTAUR
KNOW-HOW or CUTANIX KNOW-HOW is owned solely by the disclosing party and that
unauthorized disclosure or use could cause irreparable harm and significant
injury that might be difficult to ascertain or for which money is inadequate
compensation. Accordingly, each party will be entitled to seek injunctive relief
and other preliminary and equitable relief to enjoin the disclosure, or
threatened disclosure, of such information, in addition to all other remedies
available to it, and the recipient of the information will not claim as a
defense to such action for injunctive relief that the disclosing party has an
adequate remedy at law.



     6.4  Upon termination of this Agreement, confidential information shall be
returned to the disclosing party, except as provided by Section 10.2 hereof.

                                       25
<PAGE>
 
                             ARTICLE 7  ACCOUNTING
                             ---------------------
                                        
     7.1  The provisions of this ARTICLE 7 shall not apply until the occurrence
of the DATE OF FIRST COMMERCIAL SALE of a LICENSED PRODUCT for which royalties
are payable by CUTANIX hereunder.



     7.2  CUTANIX shall deliver to CENTAUR within sixty (60) days after the end
of each calendar quarter a written accounting, including quantities and monetary
amounts of CUTANIX's sales subject to royalty payments and the amount of the
royalty payment due to CENTAUR for such quarter.



     7.3    When CUTANIX delivers the accounting to CENTAUR, CUTANIX shall also
deliver all royalty payments due to CENTAUR for the calendar quarter.



     7.4    CUTANIX shall keep accurate records in sufficient detail to enable
the amounts due to CENTAUR to be determined.  Upon CENTAUR's request, CUTANIX
shall permit an independent, certified public accountant selected by CENTAUR,
except one to whom CUTANIX has reasonable objection, to have access during
ordinary business hours to CUTANIX's records necessary to determine the
correctness of the royalty accounting and obtain information as to the amount
payable to CENTAUR for any such period in case of CUTANIX's failure to report or
make payment.  

                                       26
<PAGE>
 
Such examination shall be at CENTAUR's expense and shall not take place more
than once each year. These rights with respect to any year shall terminate three
(3) years after the end of any such year. Information supplied to CENTAUR by
such independent, certified public accountants shall not include any proprietary
information not required to be disclosed under other sections of this Agreement.
In the event that any such audit reveals that CUTANIX has underpaid royalties
due by five percent (5%) or more, CUTANIX shall reimburse CENTAUR for the cost
of the audit. CUTANIX shall promptly pay the full amount of any underpayment to
CENTAUR.



     7.5  All payments to be made by CUTANIX to CENTAUR under this Agreement
shall be made in United States dollars.  In the case of sales outside the United
States, the rate of exchange to be used in computing the amount of currency
equivalent in United States dollars due CENTAUR shall be made at the rate of
exchange prevailing at a New York City or San Francisco money center bank
designated by CUTANIX which CUTANIX uses for currency conversion in the
preparation of CUTANIX's audited financial reports.  The method CUTANIX uses in
computing the rate of exchange for this Agreement shall be the same method
CUTANIX uses for currency conversion in preparation of CUTANIX's audited
financial reports.



                             ARTICLE 8 - LIABILITY
                             ---------------------

                                       27
<PAGE>
 
     8.1  CUTANIX assumes all risk of damage or injury to persons or property
arising out of the research and development (including clinical testing),
manufacture, use or sale of the LICENSED PRODUCT, and shall hold harmless and
indemnify CENTAUR from and against any and all personal injury, property damage,
product liability or similar claims, losses and liability arising out of
research and development (including clinical testing), manufacture, use or sale
of the LICENSED PRODUCT, including attorneys' fees and other costs of defense.
 


     8.2  CENTAUR assumes all risk of damage or injury to persons or property
arising out of the research and development (including clinical testing),
manufacturing, use or sale of products, incorporating the CUTANIX PATENT RIGHTS
and CUTANIX KNOW-HOW licensed to CENTAUR hereunder, and shall hold harmless and
indemnify CUTANIX from and against any and all personal injury, property damage,
product liability or similar claims, losses and liability arising out of
research and development (including clinical testing), manufacture, use or sale
of such products, including attorneys' fees and other cost of defense.



                             ARTICLE 9 - DURATION
                             --------------------

     This Agreement becomes effective as of the day and year first above
written, may be terminated as set forth in Article 10 hereof, and otherwise
remains in effect until December 31, 2020.  Upon expiration of this Agreement
under this Article 9, CUTANIX 

                                       28
<PAGE>
 
shall continue to have the right to make, have made, use and sell LICENSED
PRODUCT worldwide in the FIELD OF USE without payment of royalty.


                           ARTICLE 10 - TERMINATION
                           ------------------------

     10.1  CENTAUR may terminate this Agreement with or without notice to
CUTANIX if CUTANIX becomes subject to any BANKRUPTCY PROCEEDING. CENTAUR may
terminate this Agreement upon thirty (30) days prior written notice to CUTANIX
if CUTANIX fails to use commercially reasonable efforts to exploit the CENTAUR
PATENT RIGHTS and CENTAUR KNOW-HOW licensed hereunder (including, but not
limited to, research and development activities and active efforts to obtain
patent protection) for a period of one hundred eighty (180) days, provided,
however, that (i) this provision shall not take effect until the first
anniversary date of this Agreement and (ii) if the reason for such non-use is a
lack of funds and CUTANIX is actively making a good faith effort to obtain funds
necessary for it to conduct its operations, it shall be given an additional one
hundred eighty (180) days grace period in which to resume use of the CENTAUR
PATENT RIGHTS and CENTAUR KNOW-HOW (provided, further, that this clause (ii)
will not apply if CUTANIX has funds available to it, but applies such funds for
other purposes).  In the event of such termination, CENTAUR shall be granted a
perpetual, irrevocable, royalty free license to all CUTANIX improvements,
enhancements and inventions to CENTAUR's technology and to all CUTANIX PATENT
RIGHTS and CUTANIX KNOW-HOW 

                                       29
<PAGE>
 
existing at the time of termination for use outside the FIELD OF USE.
Termination by CENTAUR in accordance with this Section shall be without
prejudice to any other rights or remedies CENTAUR may have hereunder.



     10.2  Upon termination of this Agreement under Section 10.1, CUTANIX
shall return all CENTAUR KNOW-HOW to CENTAUR, provided that CUTANIX may retain
one copy of the CENTAUR KNOW-HOW in its confidential files for record purposes
only and access to such files shall be strictly limited to executive officers of
CUTANIX on a need to know basis.



     10.3  CUTANIX may terminate CENTAUR's rights under Section 2.3 hereof with
or without notice to CENTAUR if CENTAUR becomes subject to any BANKRUPTCY
PROCEEDING.  In addition, CUTANIX may terminate CENTAUR's rights under Section
2.3 hereof with respect to CUTANIX PATENT RIGHTS and CUTANIX KNOW-HOW if CENTAUR
fails to use commercially reasonable efforts to exploit the CUTANIX PATENT
RIGHTS or CUTANIX KNOW-HOW (including, but not limited to, research and
development activities and active efforts to obtain patent protection) for a
period of one year, provided, however, that (i) this provision shall not take
effect until the first anniversary date of this Agreement, (ii) if the reason
for such non-use is a lack of funds and CENTAUR is actively making a good faith
effort to obtain funds necessary for it to conduct its 

                                       30
<PAGE>
 
operations, it shall be given an additional one hundred eighty (180) days grace
period in which to resume use of the CUTANIX PATENT RIGHTS and CUTANIX KNOW-HOW
(provided, further, that this clause (ii) will not apply if CENTAUR has funds
available to it, but applies such funds for other purposes), and (iii) this
provision will not apply to the license to CENTAUR of enhancements, improvements
and inventions derived by CUTANIX or its agent from the use of CENTAUR PATENT
RIGHTS or CENTAUR KNOW-HOW for use outside the FIELD OF USE provided for in
Section 2.3.



     10.4  Upon termination of CENTAUR's rights under Section 10.3, CENTAUR
shall return all CUTANIX KNOW-HOW to CUTANIX (other than as provided in clause
(iii) of the final sentence of Section 10.3), provided that CENTAUR may retain
one copy of the CUTANIX KNOW-HOW in its confidential files for record purposes
only and access to such files shall be strictly limited to executive officers of
CENTAUR on a need to know basis.



     10.5  Sections 2.3 (unless CENTAUR'S rights thereunder are terminated
pursuant to Section 10.3), 2.4, 6.1-6.3, 7.1-7.4, 8.1, 8.2, the last sentence of
9, the third sentence of Section 10.1, 10.2, 10.4, 10.5, 10.6, 11.1, 11.2 and 12
shall survive termination of this Agreement pursuant to this Article 10 or
expiration of this Agreement pursuant to Article 9.

                                       31
<PAGE>
 
     10.6  In the event this Agreement is terminated pursuant to Section 10.1,
CENTAUR shall have the option to repurchase any or all of the supplies sold by
it to CUTANIX under the Services and Supply Agreement between CENTAUR and
CUTANIX of even date herewith at the prices set forth in CENTAUR's invoices to
CUTANIX, provided, however, that such rights will not extend to any supplies
which CUTANIX has commenced processing prior to the date of the termination of
this Agreement.  All LICENSED PRODUCT in CUTANIX's inventory at the time of such
termination may be sold by CUTANIX thereafter, subject to the terms of this
Agreement.



                        ARTICLE 11 - DISPUTE RESOLUTION
                        -------------------------------

     11.1  In the event of any controversy, claim or dispute (other than
disputes for which injunctive relief is available pursuant to Section 6.3
hereof), the party initiating the controversy, claim or dispute shall provide to
the other party a written notice containing a brief and concise statement of the
matter, together with relevant supporting facts. During a period of sixty (60)
days or such longer period as mutually agreed, the parties shall attempt to
settle the matter by good faith negotiation. Such efforts shall include, but not
be limited, to full presentations of both parties claims, with or without
counsel, to the President of CENTAUR and the President of CUTANIX.

                                       32
<PAGE>
 
     11.2  In the event that efforts under Section 11.1 are not successful,
such dispute shall be resolved by arbitration. Failure to comply with Section
11.1 with respect to such controversy, claim or dispute shall be absolute bar to
the institution of any arbitration proceeding with respect to the controversy,
claim or dispute.  Any such arbitration shall proceed in Santa Clara County,
California in accordance with the rules of the American Arbitration Association
then in effect before a single arbitrator designated by the parties.  If the
parties are unable to agree on a single arbitrator, then CUTANIX and CENTAUR
shall each select one arbitrator and a third shall be selected by the two
arbitrators so chosen.  In the event that either party fails to appoint an
arbitrator within one month after receipt of written notification of the
arbitration proceeding, such arbitrator shall, at the written request of the
party requesting arbitration, be appointed by the American Arbitration
Association.  The arbitration award shall be final and binding regardless of
whether one of the parties fails or refuses to participate in the arbitration
and shall be enforceable by any court of competent jurisdiction.  Any
arbitration proceedings hereunder shall be conducted in English.



                          ARTICLE 12 - GOVERNING LAW
                          --------------------------

     This Agreement shall be construed and the respective rights of the parties
hereto determined according to the laws of the 

                                       33
<PAGE>
 
State of California notwithstanding the provisions governing conflict of laws
under such law to the contrary.



                            ARTICLE 13 - ASSIGNMENT
                            -----------------------

     Except as otherwise provided herein, neither this Agreement, nor any
interest hereunder, shall be assignable by either party by operation of law or
otherwise without the prior written consent of the other; provided, however,
that either party may assign this Agreement to any wholly-owned subsidiary or to
any successor by merger or sale of substantially all of its assets to which this
Agreement relates in a manner such that the assignor shall remain liable and
responsible for the performance and observance of all its duties and obligations
hereunder, or if the assignor disappears because of such transaction, the
assignee must agree to abide by the terms and conditions of this Agreement.



                     ARTICLE 14 - SEVERANCE AND INSOLVENCY
                     -------------------------------------

     If any provision of this Agreement is held to be invalid or unenforceable,
all other provisions shall nevertheless continue in full force and effect.  In
the event that the invalid or unenforceable provision is a material term of the
Agreement, the parties shall negotiate a substitute provision acceptable to both
parties that accomplishes, to the extent possible, the original business
purpose.  In addition, the parties intend that the 

                                       34
<PAGE>
 
Agreement shall not be deemed an executory contract under the bankruptcy laws of
the United States of America.


                            ARTICLE 15 - AMENDMENT
                            ----------------------

     This Agreement (together with the Stock Purchase Agreement and the Services
and Supply Agreement) constitutes the entire agreement between the parties and
supersedes all previous arrangements whether written or oral.  Any amendment or
modification to this Agreement shall be made in writing signed by both parties.


                             ARTICLE 16 - NOTICES
                             --------------------


     Notices to CENTAUR shall be addressed to:

                    Centaur Pharmaceuticals, Inc.
                    484 Oakmead Parkway
                    Sunnyvale, California 94086
                    Attention:  President and Chief Executive Officer


     Notices to CUTANIX shall be addressed to:

                    Cutanix Corporation
                    484 Oakmead Parkway
                    Sunnyvale, California 94086
                    Attention:  President and Chief Executive Officer


     Either party may change its address by giving notice to the other party in
the manner herein provided.  Any notice required or provided for by the terms of
this Agreement shall be in 

                                       35
<PAGE>
 
writing and sent by telecopy, recognized overnight express courier, registered
or certified mail, return receipt requested, postage prepaid and properly
addressed in accordance with the paragraph above. The effective date of notice
shall be the actual date of receipt by CENTAUR or CUTANIX.



                          ARTICLE 17 - FORCE MAJEURE
                          --------------------------

     No failure or omission by the parties hereto in the performance of any
obligation of this Agreement shall be deemed a breach of this Agreement or
create any liability if the same arise from any cause or causes beyond the
control of the parties, including, but not limited to, the following:  act of
God; acts or omissions of any government; any rules, regulations or orders
issued by any government authority or by any officer, department, agency or
instrumentality thereof; fire; storm; flood; earthquake; accident; war;
rebellion; insurrection; riot; invasion; strikes; and lockouts and provided that
such failure or omission resulting from one of the above causes is cured as soon
as is practicable after the occurrence of one or more of the above-mentioned
causes. Notwithstanding the foregoing, the inability of a party to perform due
to its failure to comply with any applicable law, rule, regulation, ordinance,
license or permit or order of a court of other tribunal in effect on the date
hereof shall not be deemed a force mejeure event.

                                       36
<PAGE>
 
                ARTICLE 18 - PUBLIC ANNOUNCEMENTS/MISCELLANEOUS
                -----------------------------------------------

     18.1  Any announcements or similar publicity with respect to this
Agreement or the transactions contemplated herein shall be at such time and in
such manner as CENTAUR and CUTANIX shall agree, provided that nothing herein
shall prevent either party upon notice to the other from making such public
announcements as such party's legal obligations require.



     18.2  During the term of this Agreement, either party shall be free to
make scientific publications, provided that if such publication includes
information regarding the technology or know-how it receives from the other
party hereunder, the party making such publication shall submit to the other
party an early draft of all such publications, whether they are to be presented
orally or in written form, at least thirty (30) days prior to submission for
publication.  The party which has disclosed its information to the other shall
have the right to advise the party making the publication as to the
patentability of any inventions to be disclosed and both parties shall work
together to protect any and all proprietary rights.  Unless mutually agreed to
the contrary, at the end of such thirty (30) day period, the recipient may
proceed with the publication, provided that either (i) the disclosing party's
confidential information has been removed from the publication or (ii) the
disclosing party's prior written consent to such publication has been obtained.

                                       37
<PAGE>
 
     IN WITNESS WHEREOF, the undersigned have executed this Agreement as of the
date first above written.


CUTANIX CORPORATION               CENTAUR PHARMACEUTICALS, INC.

By:  /s/ Charles R. Engles        By:  /s/ Brian D. Frenzel
   -----------------------           ----------------------
   Charles R. Engles                 Brian D. Frenzel
   President and                     President and
   Chief Executive Officer           Chief Executive Officer

                                       38
<PAGE>
 
                                  SCHEDULE A

                        PATENTS AND PATENT APPLICATIONS

                                       39
<PAGE>
 
<TABLE>
<CAPTION> 
                                                        EXHIBIT A

JANUARY 14, 1998                                      CONFIDENTIAL                                             PAGE 1 OF 10

                                               CENTAUR PHARMACEUTICALS, INC.
 
                                         SUMMARY OF ACTIVE PATENTS AND APPLICANTS


Docket #     Short Title        File Date    Priority   C'try    Type        App #       Serial #     Issue Date    Exp. Date
- -----------------------------------------------------------------------------------------------------------------------------------
<S>         <C>                 <C>          <C>        <C>   <C>         <C>            <C>          <C>           <C>
001AT       Stroke, Mem - AT        8/3/94    10/17/89   AT    Foreign                    110565         3/27/95
- -----------------------------------------------------------------------------------------------------------------------------------
001AU       Stroke, Mem - AU      10/17/90    10/17/89   AU    Foreign      66133/90      653,921        2/15/95     10/17/2010
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
001BE       Stroke, Mem - BE        8/3/94    10/17/89   BE    Foreign                    496,796
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
001CH       Stroke, Mem - CH        8/3/94    10/17/89   CH    Foreign                    496,796
- -----------------------------------------------------------------------------------------------------------------------------------
001DE       Stroke, Mem - DE        8/3/94    10/17/89   DE    Foreign                    69012108       4/6/95
- -----------------------------------------------------------------------------------------------------------------------------------
001DK       Stroke, Mem - DK        8/3/94    10/17/89   DK    Foreign                    496,796
- -----------------------------------------------------------------------------------------------------------------------------------
001ES       Stroke, Mem - ES        8/3/94    10/17/89   ES    Foreign                    496,796
- -----------------------------------------------------------------------------------------------------------------------------------
001FR       Stroke, Mem - FR        8/3/94    10/17/89   FR    Foreign                    496,796
- -----------------------------------------------------------------------------------------------------------------------------------
001GB       Stroke, Mem - GB        8/3/94    10/17/89   GB    Foreign                    496,796
- -----------------------------------------------------------------------------------------------------------------------------------
001GR       Stroke, Mem - GR        8/3/94    10/17/89   GR    Foreign      3014101       3014101                    10/18/2010
- -----------------------------------------------------------------------------------------------------------------------------------
001IT       Stroke, Mem - IT        8/3/94    10/17/89   IT    Foreign                    496,796
- -----------------------------------------------------------------------------------------------------------------------------------
001JP       Stroke, Mem - JP       4/17/92    10/17/89   JP    Foreign      2-515036      2620410        3/11/97
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
001KR       Stroke, Mem - KR       4/17/92    10/17/89   KR    Foreign      92-700900     106484        10/21/96      4/17/2012
- -----------------------------------------------------------------------------------------------------------------------------------
001LI       Stroke, Mem - LI        8/3/94    10/17/89   LI    Foreign
- -----------------------------------------------------------------------------------------------------------------------------------
001LU       Stroke, Mem - LU        8/3/94    10/17/89   LU    Foreign                    496,796
- -----------------------------------------------------------------------------------------------------------------------------------
001NL       Stroke, Mem - NL        8/3/94    10/17/89   NL    Foreign                    496,796
- -----------------------------------------------------------------------------------------------------------------------------------
001R        Stroke ("Patent 1")    6/18/93    10/17/89   US    Reissue      08/078,000    Re. 35,112     12/5/95      6/18/2008
- -----------------------------------------------------------------------------------------------------------------------------------
001SE       Stroke, Mem - SE        8/3/94    10/17/89   SE    Foreign                    90915877.6
- -----------------------------------------------------------------------------------------------------------------------------------
001AU       Ulcer - AU              3/8/91      3/9/90   AU    Foreign      74895/91      658,139        7/24/95       3/8/2011
- -----------------------------------------------------------------------------------------------------------------------------------
002CA       Ulcer - CA             9/10/92      3/9/90   CA    Foreign      2,077,653
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
Docket #       Status     Attorney    Atty Docket #        Pub. Date       Pub. #
- -----------------------------------------------------------------------------------------
<S>        <C>            <C>         <C>
001AT      Issued           WHB        005699-047
- -----------------------------------------------------------------------------------------
001AU      Issued           WHB        005699-004
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
001BE      Registered       WHB        005699-037
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
001CH      Registered       WHB
- -----------------------------------------------------------------------------------------
001DE      Issued           WHB        005699-048
- -----------------------------------------------------------------------------------------
001DK      Registered       WHB
- -----------------------------------------------------------------------------------------
001ES      Registered       WHB
- -----------------------------------------------------------------------------------------
001FR      Registered       WHB
- -----------------------------------------------------------------------------------------
001GB      Registered       WHB
- -----------------------------------------------------------------------------------------
001GR      Registered       WHB        005699-036
- -----------------------------------------------------------------------------------------
001IT      Registered       WHB                      
- -----------------------------------------------------------------------------------------
001JP      Issued           WHB        005699-007
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
001KR      Issued           WHB        005699-008
- -----------------------------------------------------------------------------------------
001LI      Registered       WHB
- -----------------------------------------------------------------------------------------
001LU      Registered       WHB
- -----------------------------------------------------------------------------------------
001NL      Registered       WHB
- -----------------------------------------------------------------------------------------
001R       Issued           WHB        005699-003
- -----------------------------------------------------------------------------------------
001SE      Registered       WHB        005699-038
- -----------------------------------------------------------------------------------------
001AU      Issued           WHB        005699-011
- -----------------------------------------------------------------------------------------
002CA      Allowed          WHB        005699-012
- -----------------------------------------------------------------------------------------
[*]
</TABLE>
<PAGE>
 

January 14, 1998                 CONFIDENTIAL                     Page 2 of 10

                         CENTAUR PHARMACEUTICALS, INC.

                   SUMMARY OF ACTIVE PATENTS AND APPLICATIONS

<TABLE> 
<CAPTION> 


Docket #     Short Title          File Date    Priority   C'try    Type         App #       Serial #     Issue Date    Exp. Date
- -----------------------------------------------------------------------------------------------------------------------------------
<S>         <C>                   <C>          <C>        <C>   <C>           <C>            <C>          <C>           <C>
002R        Ulcer ("Patent 2")      7/29/93    10/17/89   US    Reissue       08/097,998     Re 35,213      4/16/96     7/30/2008
- -----------------------------------------------------------------------------------------------------------------------------------
003CIP      Memory ("Patent 3")      3/5/93    10/17/89   US    CIP           08/027,559     5,405,874      4/11/95     4/11/2012
- -----------------------------------------------------------------------------------------------------------------------------------
003CIPD     Memory ("Patent 3")    12/28/94    10/17/89   US    Divisional    08/365,548     5,578,617     11/26/96    11/26/2013
- -----------------------------------------------------------------------------------------------------------------------------------
003CIPD2    Memory ("Patent 3")      6/6/95    10/17/89   US    Continuation  08/468,561     5,681,965     10/28/97    10/28/2014
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
004AU       Spin Trap - AU          6/18/92     6/18/91   AU    Foreign       22,614/92        672,364
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
004CIP2     Spin Trap - ("Pat 4")   3/15/94    10/17/89   US    Continuation  08/212,800     5,622,994
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
004EP       Spin Trap - EP          1/17/94     6/18/91   EP    Foreign       92914539.9-2107
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
005         CPI-22                 12/23/93    12/23/93   US    Original      08/173,579     5,418,145      1/30/96    12/23/2013
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
005AU       CPI-22 - AU            12/22/94    12/23/93   AU    Foreign       15527/95          679835     10/20/97    12/22/2014
- -----------------------------------------------------------------------------------------------------------------------------------
005BR       CPI-22 - BR             6/20/96    12/23/93   BR    Foreign       PI9408378-9
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
005CIP      CPI-22 Stroke           4/24/95    12/23/93   US    CIP           08/426,961     5,475,032     12/12/95    12/23/2013
- -----------------------------------------------------------------------------------------------------------------------------------
005CIPD     CPI-22 Cancer            6/6/95    12/23/93   US    Divisional    08/468,564     5,508,305      4/16/96    12/23/2013
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
005CN       CPI-22 - CN            12/22/94    12/23/93   CN    Foreign       94194993.1
- -----------------------------------------------------------------------------------------------------------------------------------
005CO       CPI-22 - CO             6/16/95    12/23/93   CO    Foreign       95026756
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------

<CAPTION>
Docket #       Status     Attorney    Att'y Docket #     Pub. Date       Pub. #
- -----------------------------------------------------------------------------------------
<S>        <C>            <C>         <C>               <C>          <C> 
002R         Issued           WHB        005699-010
- -------------------------------------------------------------------------------------------
003CIP       Issued           WHB        005699-015
- -------------------------------------------------------------------------------------------
003CIPD      Issued           WHB        005699-034
- -------------------------------------------------------------------------------------------
003CIPD2     Issued           WHB        005699-076
- -------------------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------------------
004AU        Issued           WHB        005699-027
- -------------------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------------------
004CIP2      Issued           WHB        005699-016
- -------------------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------------------
004EP        Published        WHB        005699-020       6/4/94     0590072
- -------------------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------------------
005          Issued           WHB        005699-019
- -------------------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------------------
005AU        Issued           WHB        005699-122       7/17/95    AU-B-
- -------------------------------------------------------------------------------------------
005BR        Pending          WHB        005699-112
- -------------------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------------------
005CIP       Issued           WHB        005699-078
- -------------------------------------------------------------------------------------------
005CIPD      Issued           WHB        005699-074
- -------------------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------------------
005CN        Published        WHB        005699-125       1/6/97     1136447
- -------------------------------------------------------------------------------------------
005CO        Published        WHB        005699-060       1/9/97
- -------------------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------------------
</TABLE>

<PAGE>
 
January 14, 1998                 CONFIDENTIAL                     Page 3 of 10 

                         CENTAUR PHARMACEUTICALS, INC.

                  SUMMARY OF ACTIVE PATENTS AND APPLICATIONS
<TABLE> 
<CAPTION> 

Docket #   Short Title    File Date      Priority     C'try        Type            App #         Serial #    Issue Date    Exp. Date
- ------------------------------------------------------------------------------------------------------------------------------------
<S>       <C>            <C>           <C>          <C>         <C>             <C>           <C>          <C>           <C> 
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
005EP      CPI-22-EP     12/22/94       12/23/93       EP        Foreign         95907224.0                                  
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
005HR      CPI-22-HR      6/23/95       12/23/93       HR        Foreign         P950358A                                    
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
005ID      CPI-22-ID      6/19/95       12/23/93       ID        Foreign         P-951134                                     
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
005IR      CPI-22-IR      10/5/97       12/23/93       IR        Foreign         37,607,013                                  
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
005IP      CPI-22-JP      6/24/96       12/23/93       IP        Foreign         7-518098                                    
- ------------------------------------------------------------------------------------------------------------------------------------
005KR      CPI-22-KR     10/14/96       12/23/93       KR        Foreign         703367/1996                                
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
005MA      CPI-22-MA      6/15/95       12/23/93       MA        Foreign         PV23928         23585         12/31/95   6/15/2015
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
005PK      CPI-22-PK      5/28/95       12/23/93       PK        Foreign         0286/95        134778                          
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
005SD      CPI-22-SD      6/15/96       12/23/93       SD        Foreign         PCT/237/96/SD  PCT/SD/199     8/22/96   12/22/2004
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION> 
Docket #      Status       Attorney   Att'y Docket #   Pub. Date      Pub.#
- -------------------------------------------------------------------------------
<S>       <C>              <C>       <C>            <C>          <C>           
[*]
- -------------------------------------------------------------------------------
005EP       Published       WHB       005699-128      10/9/96      0 736 004         
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
005HR       Published       WHB       005699-073      8/31/97                        
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
005ID       Published       WHB       005699-056                                     
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
005IR       Pending         WHB       005699-071                                     
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
005IP       Pending         WHB       005699-123                                     
- -------------------------------------------------------------------------------
005KR       Published       WHB       005699-126       1/8/97      97-700022         
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
005MA       Issued          WHB       005699-065                                     
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
005PK       Accepted        WHB       005699-054                                     
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
005SD       Issued          WHB       005699-120                                      
- -------------------------------------------------------------------------------
</TABLE> 

<PAGE>
 
January 14, 1998                 CONFIDENTIAL                     Page 4 of 10

                         CENTAUR PHARMACEUTICALS, INC.
 
                  SUMMARY OF ACTIVE PATENTS AND APPLICATIONS

<TABLE> 
<CAPTION> 


Docket #     Short Title        File Date    Priority   C'try    Type        App #       Serial #     Issue Date    Exp. Date
- -----------------------------------------------------------------------------------------------------------------------------------
<S>         <C>                 <C>          <C>        <C>   <C>         <C>            <C>          <C>           <C>
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- ----------------------------------------------------------------------------------------------------------------------------------- 
005TN         CPI-22-TN           6/19/95    12/23/93   TN    Foreign      95,067         16994         5/2/96
- ----------------------------------------------------------------------------------------------------------------------------------- 
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
005TW         CPI-22-TW           1/27/95    12/23/93   TW    Foreign      84100747       82452        6/16/97        1/26/2015
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
005VE         CPI-22-VE           6/20/95    12/23/93   VE    Foreign      1005-95                             
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
005ZA         CPI-22-ZA           5/25/95    12/23/93   ZA    Foreign      954297         95/4297      3/27/96        5/25/2015
- -----------------------------------------------------------------------------------------------------------------------------------
006           CPI-1020            4/14/94     4/14/94   US    Original     08/227,777     5,472,983    12/5/95        4/14/2014
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
006TW         CPI-1020-TW         3/31/95     4/14/94   TW    Foreign      84103162
- -----------------------------------------------------------------------------------------------------------------------------------
007           DMPO Spin Trapping   2/1/93     8/17/89   US    CIP          08/011,968     5,681,845    10/28/97       10/28/2014
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------

<CAPTION>

Docket #       Status     Attorney    Att'y Docket #       Pub. Date       Pub. #
- -----------------------------------------------------------------------------------------
<S>        <C>            <C>         <C>                  <C>             <C> 
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
005TN         Issued        WHB        005699-066
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
005TW         Issued        WHB        005699-028
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
005VE         Published     WHB        005699-061
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
005ZA         Granted       WHB        005699-052
- -----------------------------------------------------------------------------------------
006           Issued        WHD        005699-001
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
006TW         Allowed       WHB        005699-040            12/8/97
- -----------------------------------------------------------------------------------------
007           Issued        PLP        OMRF141
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- ----------------------------------------------------------------------------------------- 
[*]
- ----------------------------------------------------------------------------------------- 
[*]
- ----------------------------------------------------------------------------------------- 
[*]
- ----------------------------------------------------------------------------------------- 
</TABLE>


<PAGE>
 
                                                        

January 14, 1998                 CONFIDENTIAL                     Page 5 of 10

                         CENTAUR PHARMACEUTICALS, INC.

                  SUMMARY OF ACTIVE PATENTS AND APPLICATIONS

<TABLE> 
<CAPTION> 


Docket #     Short Title        File Date    Priority   C'try    Type        App #       Serial #     Issue Date    Exp. Date
- -----------------------------------------------------------------------------------------------------------------------------------
<S>         <C>                 <C>          <C>        <C>   <C>         <C>            <C>          <C>           <C>
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
008HR       CPI-1189 HR            4/3/96      4/3/95   HR       Foreign      P-960156A
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
008ID       CPI-1189 ID            4/3/96      4/3/95   ID       Foreign      P-960864 
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
008MA       CPI-1189 MA            4/1/96      4/3/95   MA       Foreign      PV.24193      23837         12/31/96     4/1/2016
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ----------------------------------------------------------------------------------------------------------------------------------
[*]

<CAPTION>
Docket #       Status     Attorney    Atty Docket #        Pub. Date       Pub. #
- -----------------------------------------------------------------------------------------
<S>        <C>            <C>         <C>
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
008HR       Published        WHB        005699-086        10/31/97         5/97
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
008ID       Published        WHB        005699-087
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
008MA       Issued           WHB        005699-093
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------
[*]
</TABLE>

<PAGE>
 
January 14, 1998                 CONFIDENTIAL                       Page 6 of 10

                         CENTAUR PHARMACEUTICALS, INC.

                  SUMMARY OF ACTIVE PATENTS AND APPLICATIONS
<TABLE> 
<CAPTION> 

Docket #   Short Title         File Date        Priority     C'try       Type        App #         Serial #   Issue Date   Exp. Date
- ------------------------------------------------------------------------------------------------------------------------------------
<S>      <C>                  <C>             <C>          <C>        <C>          <C>           <C>          <C>          <C> 
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
008NG     CPI-1189 NO              4/2/96        4/3/95      NO        Foreign       96/96          96/96       6/4/97      4/2/2016
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
008PK     CPI-1189 PK              4/1/96        4/3/95      PK        Foreign       180/96                                    
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
008W      CPI-1189 Cpds FW         3/6/97        4/3/95      US        FW Cont'n     08/812,138                                
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
008ZA     CPI-1189 ZA             10/9/96        4/3/95      ZA        Foreign       962689         96/2689    12/31/96  4/13/2016
- ------------------------------------------------------------------------------------------------------------------------------------
009       CPI-1189 treatment       4/3/95        4/3/95      US        Original      08/415,694     5,658,953   8/19/97   4/2/2015
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
                                
<CAPTION> 

Docket #      Status       Attorney   Att'y Docket #   Pub. Date      Pub.#
- -------------------------------------------------------------------------------
<S>       <C>             <C>       <C>            <C>          <C>           
[*]
- -------------------------------------------------------------------------------
008NG       Accepted       WHB        005699-095
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
008PK       Accepted       WHB        005699-097
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
008W        Allowed        WHB        005699-022
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
008ZA       Issued         WHB        005699-105
- -------------------------------------------------------------------------------
009         Issued         WHB        005699-042
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
</TABLE> 
<PAGE>
 

January 14, 1998                 CONFIDENTIAL                     Page 7 of 10

                         CENTAUR PHARMACEUTICALS, INC.
 
                   SUMMARY OF ACTIVE PATENTS AND APPLICATIONS

<TABLE> 
<CAPTION> 


Docket #     Short Title        File Date    Priority   C'try    Type        App #       Serial #     Issue Date    Exp. Date
- -----------------------------------------------------------------------------------------------------------------------------------
<S>         <C>                 <C>          <C>        <C>   <C>         <C>            <C>          <C>           <C>
010       CPI-1033 compounds       4/3/95     4/3/95    US    Original     08/415,248   5,659,082      8/19/97       4/14/2014
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- ----------------------------------------------------------------------------------------------------------------------------------- 
011       CPI-1033 treatment       4/3/95     4/3/95    US    Original     08/415,847   5,643,965       7/1/97        4/3/2015
- ----------------------------------------------------------------------------------------------------------------------------------- 
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
013PC     Uveitis PCT             4/23/97    4/23/96    PC    Foreign      PCT/US97/06604                      
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
014PC     HIVD Nitro PCT          4/17/96    4/17/96    PC    Formal       PCT/US97/06253
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
015PC     HIVD Benz PCT           4/16/97    4/17/96    PC    Foreign      PCT/US97/06351
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- ----------------------------------------------------------------------------------------------------------------------------------- 
[*]
- ----------------------------------------------------------------------------------------------------------------------------------- 
<CAPTION>

Docket #       Status     Attorney    Att'y Docket #        Pub. Date       Pub. #
- -----------------------------------------------------------------------------------------
<S>        <C>            <C>         <C>                  <C>             <C> 
010           Issued        WHB        005699-043            
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
011           Issued        WHB        005699-044
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
013PC         Published     WHB        005699-160          10/30/97          WO97/39751
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
014PC         Published     JWH                            10/23/97          WO97/38683
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
015PC         Published     WHB        005699-157          10/23/97          WO97/38684
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- ----------------------------------------------------------------------------------------- 
[*]
- ----------------------------------------------------------------------------------------- 
[*]
- -----------------------------------------------------------------------------------------  
[*]
- -----------------------------------------------------------------------------------------  
</TABLE>



<PAGE>
 
January 14, 1998                 CONFIDENTIAL                      Page 8 of 10

                         CENTAUR PHARMACEUTICALS, INC.
                                                                   
                  SUMMARY OF ACTIVE PATENTS AND APPLICATIONS
<TABLE> 
<CAPTION> 

Docket #  Short Title         File Date        Priority     C'try       Type         App #         Serial #   Issue Date   Exp. Date
- ------------------------------------------------------------------------------------------------------------------------------------
<S>      <C>                  <C>             <C>          <C>        <C>           <C>           <C>          <C>          <C> 
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
016PC    CPI-1012 PCT          7/11/97         7/19/96       PC        Foreign        PCT/US97/11960  
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION> 

Docket #      Status       Attorney   Att'y Docket #   Pub. Date      Pub.#
- -------------------------------------------------------------------------------
<S>       <C>             <C>       <C>            <C>          <C>           
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
016PC      Pending          WHB       005699-162
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
</TABLE> 
<PAGE>
 






January 14, 1998                 CONFIDENTIAL                     Page 9 of 10

                         CENTAUR PHARMACEUTICALS, INC.
 
                  SUMMARY OF ACTIVE PATENTS AND APPLICATIONS

<TABLE> 
<CAPTION> 


Docket #     Short Title        File Date    Priority   C'try    Type        App #       Serial #     Issue Date    Exp. Date
- -----------------------------------------------------------------------------------------------------------------------------------
<S>         <C>                 <C>          <C>        <C>   <C>         <C>            <C>          <C>           <C>
026AR     Cyclic Nitrones AR      9/10/92     9/12/91   AR    Foreign      323153            247731     3/31/95       3/20/2010
- -----------------------------------------------------------------------------------------------------------------------------------
026AU     Cyclic Nitrones AU       9/8/92     9/12/91   AU    Foreign      22800/92          652662    12/20/94
- ----------------------------------------------------------------------------------------------------------------------------------- 
026C2D2   Cyclic Nitrones D2      12/9/94     9/12/91   US    Divisional   08/352,470     5,498,778     3/12/96       3/12/2013
- ----------------------------------------------------------------------------------------------------------------------------------- 
026C2D3   Cyclic Nitrones D3       6/2/95     9/12/91   US    Divisional   08/458,310     5,677,315    10/14/97      10/14/2014
- -----------------------------------------------------------------------------------------------------------------------------------
026C2D4   Cyclic Nitrones D4       6/2/95     9/12/91   US    Divisional   08/458,314     5,525,615     6/11/96       6/11/2013
- -----------------------------------------------------------------------------------------------------------------------------------
026C2D5   Cyclic Nitrones D5       6/2/95     9/12/91   US    Divisional   08/458,311     5,532,252      7/2/96        7/2/2013
- -----------------------------------------------------------------------------------------------------------------------------------
026C2D6   Cyclic Nitrones D6       6/2/95     9/12/91   US    Divisional   08/458,318     5,527,812     6/18/96       6/18/2013
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
026CIP2   Cyclic Nitrones C2       8/5/92     9/12/91   US    CIP          07/926,109     5,292,746      3/8/94       9/12/2011
- -----------------------------------------------------------------------------------------------------------------------------------
026CIP2D  Cyclic Nitrones C2D1   12/20/93     9/12/91   US    Divisional   08/170,543     5,397,789     3/14/95       3/14/2012
- -----------------------------------------------------------------------------------------------------------------------------------
026EP     Cyclic Nitrones EP      9/11/92     9/12/91   EP    Foreign      92115575.0
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
026IL     Cyclic Nitrones IL       9/8/92     9/12/91   IL    Foreign      103111         103111       10/24/96        9/8/2012
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
026MX     Cyclic Nitrones MX      9/11/92     9/12/91   MX    Foreign      5199           180965         3/6/96       9/11/2012
- -----------------------------------------------------------------------------------------------------------------------------------
026NO     Cyclic Nitrones NO      9/11/92     9/12/91   NO    Foreign      923538         179514       10/23/96       9/11/2012 
- -----------------------------------------------------------------------------------------------------------------------------------
026NZ     Cyclic Nitrones NZ       9/8/92     9/12/91   NZ    Foreign      244268         244268        2/18/95        9/8/2012
- -----------------------------------------------------------------------------------------------------------------------------------
026TW     Cyclic Nitrones TW       9/8/92     9/12/91   TW    Foreign      81107090       073715        1/23/96        9/8/2012
- -----------------------------------------------------------------------------------------------------------------------------------
026ZA     Cyclic Nitrones ZA       9/7/92     9/12/91   ZA    Foreign      92/6781        92/6781       5/26/93        9/7/2012
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------------------------------------------------
<CAPTION>

Docket #       Status     Attorney    Att'y Docket #       Pub. Date       Pub. #
- -----------------------------------------------------------------------------------------
<S>        <C>            <C>         <C>                  <C>             <C> 
026AR         Issued        JMD        MO 1625B              
- -----------------------------------------------------------------------------------------
026AU         Issued        JMD        MO 1625B   
- -----------------------------------------------------------------------------------------
026C2D2       Issued        JMD        MO 1625D   
- -----------------------------------------------------------------------------------------
026C2D3       Issued        JMD        MO 1625E   
- -----------------------------------------------------------------------------------------
026C2D4       Issued        JMD        MO 1625F   
- -----------------------------------------------------------------------------------------
026C2D5       Issued        JMD        MO 1625G   
- -----------------------------------------------------------------------------------------
026C2D6       Issued        JMD        MO 1625H   
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
026CIP2       Issued        JMD        MO 1625B
- -----------------------------------------------------------------------------------------
026CIP2D      Issued        JMD        MO 1625C   
- -----------------------------------------------------------------------------------------
026EP         Published     JMD        MO 1625B   
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
026IL         Issued        JMD        MO 1625B                                     
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
026MX         Issued        JMD        MO 1625B             
- -----------------------------------------------------------------------------------------
026NO         Issued        JMD        MO 1625B    
- -----------------------------------------------------------------------------------------
026NZ         Issued        JMD        MO 1625B              
- -----------------------------------------------------------------------------------------
026TW         Issued        JMD        MO 1625B    
- -----------------------------------------------------------------------------------------
026ZA         Issued        JMD        MO 1625B    
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- -----------------------------------------------------------------------------------------
[*]
- ----------------------------------------------------------------------------------------- 
[*]
- ----------------------------------------------------------------------------------------- 
</TABLE>




<PAGE>
 
January 14, 1998                 CONFIDENTIAL
                                                                   Page 10 of 10
                         CENTAUR PHARMACEUTICALS, INC.

                  SUMMARY OF ACTIVE PATENTS AND APPLICATIONS
<TABLE> 
<CAPTION> 

Docket #   Short Title         File Date        Priority     C'try       Type         App #        Serial #   Issue Date   Exp. Date
- ------------------------------------------------------------------------------------------------------------------------------------
<S>      <C>                  <C>             <C>          <C>        <C>           <C>           <C>          <C>        <C> 
027ZA     Cyclic Nitrones 2 ZA     9/5/96       9/11/95       ZA        Foreign      96/7514        96/7514    5/28/97      9/5/2016
- ------------------------------------------------------------------------------------------------------------------------------------
029       Hindered Phenols       10/22/93      10/22/93       US        Original     141,241      5,455,272    10/3/95     10/3/2012
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
029D1     Hindered Phenols D1     4/10/95      10/22/93       US        Divisional   419,157      5,527,828    6/18/96     6/18/2013
- ------------------------------------------------------------------------------------------------------------------------------------
029D2     Hindered Phenols D2     4/10/95      10/22/93       US        Divisional   419,159      5,532,273     7/2/96     10/3/2012
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------
[*]
- ------------------------------------------------------------------------------------------------------------------------------------

<CAPTION> 
Docket #      Status       Attorney   Att'y Docket #   Pub. Date      Pub.#
- -------------------------------------------------------------------------------
<S>       <C>             <C>       <C>            <C>          <C>           
027ZA       Issued         JMD       MO1831
- -------------------------------------------------------------------------------
029         Issued         POS 
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
029D1       Issued         POS
- -------------------------------------------------------------------------------
029D2       Issued         POS
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
[*]
- -------------------------------------------------------------------------------
</TABLE> 

                                 PATENT COUNTS
<TABLE> 
<CAPTION> 
                  Awaiting Confirmation     Pending      Allowed        Issued     Total
    <S>                 <C>                 <C>           <C>            <C>       <C> 
      US                  0                   22            1             24         47
      Foreign             0                  140            6             35        181
      Total               0                  162            7             59        228
</TABLE> 

<PAGE>
 
                                                                 EXHIBIT 10.19
                        SERVICES AND SUPPLY AGREEMENT

     Services and Supply Agreement (the "Agreement"), dated as of January 15,
1998 by and between Cutanix Corporation, a corporation organized and existing
under the laws of the State of Delaware, with offices at 484 Oakmead Parkway,
Sunnyvale, California 94086 ("Cutanix"), and Centaur Pharmaceuticals, Inc., a
corporation organized and existing under the laws of the State of Delaware, with
offices at 484 Oakmead Parkway, Sunnyvale, California 94086 ("Centaur").


                                   WITNESSETH

     WHEREAS, Centaur and Cutanix are parties to a certain License of even date
herewith Agreement (the "License Agreement");

     WHEREAS, Cutanix requires a supply of certain Nitrone Related Therapeutic
(NRT/TM/) compounds (the "Compounds") in connection with its activities
permitted under the License Agreement;

     WHEREAS, Cutanix wishes to purchase from Centaur and Centaur wishes to
manufacture and supply Cutanix with the Compounds; and

     WHEREAS, Cutanix wishes to receive services from Centaur for the support of
its business and Centaur is willing to provide such services on the terms and
conditions set forth herein.

     NOW THEREFORE, in consideration of the promises and mutual covenants herein
contained, the parties agree as follows:

     1.  Services to be Provided.
         ----------------------- 

         (a)  Subject to the terms and conditions hereof, Centaur will provide
Cutanix with the following services to the extent requested by Cutanix (the
"Services"):

               (i)  Management.  Management services necessary to enable 
                    ----------                                           
Cutanix to manage its overall operations, including, without limitation,
manufacturing, sales and marketing, research and development, and accounting
and financial activities;

               (ii)  Accounting.  Accounting services necessary to the 
                     ----------                                      
operation of the Company, including maintaining books of record, cash
management and financial reporting;

- --------------------------------------------------------------------------------
[*] - Confidential treatment is being sought with respect to this portion of 
      this agreement.  This portion has been omitted from this filing and has 
      been filed separately with the Securities and Exchange Commission.

<PAGE>
 
               (iii)  MIS Support.  MIS support, including, without limitation, 
                      -----------                                       
services for financial systems, inventory control and other administrative
functions;

               (iv)   Facilities.  Use of designated office and laboratory 
                      ----------                                     
space;

               (v)    Purchasing and Receiving.  Purchasing and receiving of 
                      ------------------------                           
items such as raw materials, equipment, components, and the like;

               (vi)  Human Resources.  Personnel and related services as 
                     ---------------                                   
necessary, including payroll activities and access to employee benefit plans
and other corporate programs, to the extent the same can legally and
contractually be made available to Cutanix and its employees;
 
               (vii) Scientific and Management Consultation.   Consultation 
                     --------------------------------------               
with Centaur's scientific and management personnel, as required;

               (viii) Patent and Regulatory Advice.  Consultation with Centaur 
                      ----------------------------                    
personnel on patent and regulatory matters;
 
               (ix) Process Development.  Development or transfer to a third 
                    -------------------                             
party of commercial scale manufacturing methods; and

               (x)  Other Services.  Such other services as may be requested 
                    --------------                                   
by Cutanix and agreed to by Centaur.

 
          (b)  Exceptions.  Notwithstanding anything to the contrary set forth 
               ----------                                            
in this Agreement, Centaur is not required to provide Services to Cutanix
which exceed Centaur's capabilities and/or resources, as reasonably determined
by Centaur. If Cutanix requires Services which exceed Centaur's capabilities
and resources, Centaur will consider expanding and/or increasing its
capabilities and resources at Cutanix' expense. Prior to undertaking any such
expansion or increase, Centaur will present a good faith, reasonable, non-
binding estimate of the expenses of such undertaking and will not take any
action in that regard unless Cutanix delivers written confirmation of its
approval of the cost estimate and its consent for Centaur to proceed with the
work required. In addition, Centaur may withhold providing requested Services
if Cutanix is delinquent in the payment of any invoice delivered under this
Agreement.

     2.   Advances and Other Payments.  Subject to the limitations set forth in
          ---------------------------                                          
Section 3 hereof and in Section 9 of the Stock Purchase Agreement between
Cutanix and Centaur of even date herewith (the "Stock Purchase Agreement"),
Centaur will, at Cutanix' request, advance monies to Cutanix and/or make
payments on behalf of Cutanix to third parties, including, but not limited to,
payments owed by Cutanix related to its formation ("Advances").  It is
understood and agreed by the parties that (i) payments made by Centaur to third
parties on behalf of Cutanix from June 1, 1997 through the date of this
Agreement and (ii) all other Services provided by Centaur to Cutanix from

                                       2
<PAGE>
 
December 1, 1997 through the date of this Agreement, have not yet been invoiced
by Centaur, but will be considered to be Services provided under this Agreement
and, accordingly, will be subject to all of the terms hereof.

     3.  Payment to Centaur.  Costs for the Services provided hereunder by
         ------------------                                               
Centaur will be paid by Cutanix to Centaur within forty-five (45) days after
receipt by Cutanix of an invoice from Centaur.  In the alternative, Cutanix may,
within such forty five (45) day period, elect, by delivery of written notice to
Centaur, to add all or a portion of the amount stated in an invoice to the
Advances, provided that such election does not cause the then outstanding
aggregate amount of Advances to exceed the maximum permitted Advances set forth
in Section 9 of the Stock Purchase Agreement.  All invoices (or parts thereof)
which are properly added to the Advances will not be considered to be
delinquent.  Centaur's invoice will contain sufficient detail to enable Cutanix
to clearly understand how the amount due was calculated and how to break the
amounts down into Cutanix' cost codes.  Costs for the Services shall be
determined in accordance with United States generally accepted accounting
principles, and will be divided into two components, those being actual costs
and overhead.  Costs will consist of the following:

         (a)  Actual Costs.  Actual costs will consist of [*]
              ------------                                          

         (b)  Overhead.   Overhead will be determined by multiplying the costs 
              --------                                                  
of direct labor as calculated pursuant to Section 4(a)(i), above, by [*]. The
intent of the parties is that the payment of overhead will cover the portion of
Centaur's administrative costs, facilities costs and other corporate overhead
costs which reasonably support Cutanix.

     4.  Supply and Purchase of Compounds.
         -------------------------------- 

         (a)  Supply.  Centaur undertakes to manufacture and supply Cutanix'
              ------                                                        
requirements of the Compounds for use in connection with activities authorized
by the License Agreement.  Centaur shall be Cutanix' exclusive supplier of the
Compounds during the period beginning as of the date hereof and ending upon the
earlier of:

              (i)  Centaur's delivery of notice to Cutanix that it wishes to
terminate the exclusivity for any reason, or

              (ii) Cutanix' delivery of notice to Centaur that it wishes to
terminate Centaur's exclusivity due to Centaur's inability or unwillingness to
fulfill its supply obligations under this Agreement,

such period being referred to herein as the "Exclusive Period".

                                       3
<PAGE>
 
For twelve (12) months following termination of the Exclusive Period, Centaur
shall be obligated to supply Cutanix in the same manner as during the Exclusive
Period, subject to Cutanix' delivery of forecasts and orders as provided below.
Upon termination of the Exclusive Period, Centaur will provide (i) at no cost to
Cutanix, all documents related to the manufacturing of Compounds that are
reasonably required to enable another supplier to manufacture such Compounds,
(ii) an unrestricted royalty-free license to any intellectual property or know-
how used by Centaur in manufacturing the Compounds (without the right to grant
sublicenses, except to a third party supplier for the limited purpose of
manufacturing Compounds for Cutanix), and (iii) subject to Cutanix' compliance
with the cost reimbursement provisions of Section 3 hereof, technical and
operating advice to facilitate the manufacturing of the Compounds by Cutanix or
another supplier, subject in all cases to the agreement by any third party
supplier not to use or disclose information provided by Centaur for any purpose,
other than the manufacture of Compounds for Cutanix.

          (b)  Forecast.  Cutanix will, before each January 1, April 1, July 1 
               --------                                              
and October 1, present to Centaur a written forecast estimating the quantities
of the Compounds to be delivered during each of the next fifteen (15) months.
Cutanix will promptly notify Centaur of any significant change to its fifteen
(15) month requirements forecast.

          (c)  Acceptance of Forecast; Capacity Additions. Within thirty (30)
               ------------------------------------------                    
days of receipt of Cutanix' forecast, Centaur will notify Cutanix whether it
accepts such forecast.  Centaur shall accept such forecast unless (i) deliveries
forecasted in any consecutive three (3) month period exceed deliveries in every
consecutive three (3) month period in the forecast prior thereto which had most
recently been accepted by Centaur and (ii) Centaur does not expect to have
capacity available in its manufacturing facilities which can produce the
forecasted requirements in a commercially reasonable manner.  If Centaur does
not accept Cutanix' forecast, Centaur will provide Cutanix with its assessment
of its lowest cost alternatives to add sufficient capacity to meet Cutanix'
forecasted delivery requirements and the amounts of production that would be
required in order for Centaur to recover through depreciation charges the
capital costs of such alternative investments under Section 4(f)(i)(e) hereof.
Subject to Cutanix making a commitment to purchase the full amount of production
referred to in the preceding sentence (a "Minimum Purchase Commitment"), Centaur
shall promptly take whatever steps are reasonably necessary to add such capacity
and shall accept Cutanix' forecast as presented, or as revised by mutual
agreement.  Any capacity added in reliance upon a Cutanix Minimum Purchase
Commitment shall be made available preferentially, though not exclusively, to
Cutanix.  Any product manufactured utilizing such capacity, whether for Cutanix
or otherwise, will be credited against Cutanix' Minimum Purchase Commitment with
respect to such capacity.  If Centaur fails to provide Cutanix within sixty (60)
days of receipt of Cutanix' forecast with commercially reasonable alternatives
for adding sufficient capacity to meet such forecast, Cutanix may terminate the
Exclusive Period.  The test for commercial reasonableness shall include
consideration of the magnitude of the commitments required by either party in
light of their respective 

                                       4
<PAGE>
 
financial resources. In the event that Centaur provides a commercially
reasonable alternative for adding sufficient capacity to meet Cutanix'
forecast but Cutanix fails to undertake the requisite Minimum Purchase
Commitment, the new accepted forecast shall be deemed to be the one with the
greatest equal monthly deliveries which does not violate the condition set
forth in clause (i) of this Section 4(c), above. If Centaur adds capacity for
Cutanix in reliance on a Minimum Purchase Commitment and Cutanix fails to meet
such Minimum Purchase Commitment (other than through the failure of Centaur to
supply the amounts set forth in the Minimum Purchase Commitment for any
reason) and Centaur cannot find a commercially reasonable alternative use for
such capacity after reasonable effort, Cutanix shall pay to Centaur the
unrecovered portion of the capital cost of such capacity. In the event that
Cutanix wishes for Centaur to add more cost effective capacity for
manufacturing the Compounds at any time, Centaur shall make reasonable efforts
to do so provided (i) Cutanix undertakes a Minimum Purchase Commitment
appropriate for such capacity addition and (ii) any unfulfilled portion of the
Minimum Purchase Commitment for previously added capacity is treated as set
forth above in this Section 4(c).

     (d) Firm Orders.  Cutanix will place firm, non-cancellable orders for
         -----------                                                      
delivery, with lead time to be mutually agreed upon once a product is known and
the logistics are defined, but not less than ninety (90) days prior to the
required shipment date, and Centaur will be obliged to deliver all ordered
Compounds by the delivery date stated in the order, except to the extent that
such supply would exceed the latest accepted forecast given by more than twenty
percent (20%) for the month in question.  No order may be less that one
production batch, which will be defined and mutually agreed upon by the parties
once specific products and production processes are known. In addition, a
reasonable minimum annual purchase requirement shall be agreed upon by the
parties acting in good faith, with such minimum annual purchase requirement to
commence with the third full year after Cutanix' initial product is first
commercially marketed.

     (e)  Delivery Terms.  The terms and conditions of sale attached hereto as
          --------------                                                      
Exhibit A shall be applicable to all sales of the Compounds hereunder.  If there
is any inconsistency between the terms and conditions of sale and this
Agreement, this Agreement shall prevail.

     (f)  Pricing.
          ------- 

          (i)  Cutanix will purchase the Compounds from Centaur at the Standard
Manufacturing Price ("SMP"). The SMP shall equal [*] of Standard Costs, which
include costs of production, quality control, quality assurance, handling,
shipping and warehousing. Standard Costs shall equal the sum of (a) through (e)
below:

               (a)  Active and inactive raw materials and compounds at the
purchase price;

               (b)  Finishing and packaging supplies at the purchase price;

                                       5
<PAGE>
 
               (c)  Full direct labor cost including benefits costs paid by
Centaur;

               (d)  Variable overheads (variable overheads include, but are
not limited to, the expenses generated within a production, warehousing or
shipping department such as wages and benefits of indirect labor, indirect
operating supplies, etc.); and

               (e)  Fixed overheads (fixed overheads include those expenses
necessary to run a particular manufacturing site (e.g. plant administration,
taxes, insurance, depreciation, repairs and maintenance) and are allocated to
product based on its total direct labor hours, machine hours, cycle time
and/or volume of end product);

provided, however, that in calculating Standard Costs, the sum of items (d) and
(e) above shall not exceed [*] of the sum of items (a), (b) and (c) above.

         (ii)   If Centaur sources the Compounds from a third party, the price
charged to Cutanix for such Compounds will be as if the Compounds were
manufactured by Centaur, i.e., the SMP using Centaur's average Standard Costs
for the last three deliveries of the Compounds of Centaur origin to Cutanix.

         (iii)  If Centaur sources the Compounds from a third party without
having manufactured the Compounds in quantities sufficient to fill three
delivery orders of normal volume during the twelve (12) months preceding the
date of relevant delivery to Cutanix hereunder, the price charged to Cutanix
for such Compounds will be the actual price charged to Centaur by the third
party supplier for the Compounds in question plus [*], always provided that
the price so charged by the third party supplier does not exceed the price
otherwise charged to Centaur by the same supplier for other similar supplies
as per Centaur's written evidence should Cutanix so request.

     (g) Manufacturing Methods.  During the Exclusive Period, Centaur will
         ---------------------                                            
utilize the lowest cost manufacturing methods reasonably available in its
facilities to produce the Compounds in the quantities ordered.  If lower cost
production can reasonably be achieved using available capacity other than
capacity built for Cutanix, Centaur will utilize such capacity to lower the
price charged to Cutanix, and such production shall continue to be credited
against any outstanding Minimum Purchase Commitments.

     (h) Notification of Events Concerning Supply.  Centaur will promptly
         ----------------------------------------                        
notify Cutanix of any circumstances that may be of importance as to Centaur's
ability to supply Cutanix with the Compounds.

     (i) Guaranty of Quality.  Centaur covenants and warrants that the quality
         -------------------                                                  
of the Compounds to be supplied by Centaur hereunder shall meet mutually agreed
specifications ("Specifications") and will be manufactured in accordance with
U.S. Food and Drug Administration regulations as outlined in applicable
sections of CFR 21.

                                       6
<PAGE>
 
         (j)  Cutanix Inspection.  Within sixty (60) days following receipt of 
              ------------------                                       
each shipment and before the Compounds are put into further production,
whichever is first to occur, Cutanix shall carry out customary tests and
inspections as separately agreed between the parties. Should any quantity of
the Compounds be found not to conform with the Specifications, Centaur shall,
at its sole cost, replace the defective quantity in accordance with Section 4
of the terms and conditions attached hereto as Schedule A, provided that
Cutanix has notified Centaur of such non-conformity within ninety (90) days
following receipt of the defective quantity of Compounds.
 
     5.  Cutanix Covenant.  Cutanix covenants and agrees that the services and
         ----------------                                                     
Compounds provided hereunder will not be used, nor will Cutanix act, to the
detriment or disadvantage of Centaur.
 
     6.  Term and Termination.
         -------------------- 

         (a)  Term.  The term of this Agreement (the "Term") shall commence as 
              ----                                                     
of the date hereof. Unless sooner terminated pursuant to this Agreement, the
Term shall expire at such time as the License Agreement expires.

         (b)  Default.  Failure by either party to comply with any of its 
              -------                                                
material obligations contained in this Agreement following notice and
opportunity to cure, as hereinafter provided (a "Default") shall entitle the
other party to terminate this Agreement. The non-defaulting party shall give
the other party notice specifying the nature of the breach of this Agreement
and requiring it to cure. If such breach is not cured within ninety (90) days
after the receipt of such notice (or one hundred twenty (120) days in event
such breach cannot be reasonably expected to be cured within ninety (90) days,
and the defaulting party gives notice to the other party of its inability to
cure such breach within a 90-day period and the defaulting party thereafter
uses reasonable efforts to cure such breach as soon as practicable, but in no
event longer than one hundred twenty (120) days, the notifying party shall be
entitled, without prejudice to any of its other rights under this Agreement,
and in addition to any other remedies available to it by law or in equity, to
terminate this Agreement by giving notice to that effect to the defaulting
party. The right of either party to terminate this Agreement, as hereinabove
provided, shall not be affected in any way by its waiver or failure to take
action with respect to any previous Default.

         (c)  Insolvency or Bankruptcy.  Either party may, in addition to any 
              ------------------------                                      
other remedies available to it by law or in equity, terminate this Agreement by
written notice to the other party in the event (i) the other party shall have
become insolvent or bankrupt, or shall have made an assignment for the benefit
of its creditors, or (ii) there shall have been appointed a trustee or receiver
of the other party or for all or a substantial part of its property, or (iii)
any case or proceeding shall have been commenced or some other action taken by
or against the other party in bankruptcy or seeking reorganization, liquidation,

                                       7
<PAGE>
 
dissolution, winding-up, arrangement, composition or readjustment of its debts
or any other relief under any bankruptcy, insolvency, reorganization or other
similar act or law of any jurisdiction now or hereafter in effect or there shall
have been issued a warrant of attachment, execution, distraint or similar
process against any substantial part of the property of the other party, and any
such event or action (except where a party voluntarily takes such actions (e.g.,
where a party makes a bankruptcy filing)) shall have continued for ninety (90)
days undismissed, unbounded and undischarged (alternatively a "Bankruptcy");
provided, however, that no such right to terminate shall pertain solely by
virtue of a voluntary reorganization for the purpose of solvent amalgamation or
reconstruction.

         (d)  Effect of Termination of Agreement. Upon termination of this
              ----------------------------------                          
Agreement for any reason, nothing herein shall be construed to release either
party from any obligation that matured prior to the effective date of such
termination.
 
     7.  Audits.  Centaur shall keep accurate records in sufficient detail to
         ------                                                              
enable the amounts due to Centaur hereunder to be determined.  Upon Cutanix'
request, Centaur shall permit an independent, certified public accountant
selected by Cutanix, except one to whom Centaur has reasonable objection, to
have access during ordinary business hours to Centaur's records necessary to
determine the correctness of and obtain information as to the amount payable to
Centaur for any such period.  Such examination shall be at Cutanix' expense and
shall not take place more than once each year.  These rights with respect to any
year shall terminate three (3) years after the end of any such year.
Information supplied to Cutanix by such independent, certified public
accountants shall not include any proprietary information not required to be
disclosed under other sections of this Agreement.  In the event that any such
audit reveals that Cutanix has been overcharged by the greater of (i) $5,000 or
(ii) five percent (5%) of the total charges in issue which are the subject of
the audit, Centaur shall reimburse Cutanix for the cost of the audit. Centaur
shall promptly reimburse the full amount of any overpayment to Cutanix.

     8.   Miscellaneous.
          -------------

     8.1  No Partnership.  Nothing in this Agreement is intended or shall be
          --------------                                                    
deemed to constitute a partnership, agency, employer, employee or joint venture
relationship between the parties.  Neither party shall incur any debts or make
any commitments for the other.


     8.2  Assignments. Except as otherwise provided herein, neither this
          -----------                                                   
Agreement nor any interest hereunder shall be assignable by either party by
operation of law or otherwise without the prior written consent of the other;
provided, however, that either party may assign this  Agreement to any wholly-
owned subsidiary or to any successor by merger or sale of substantially all of
its assets to which this Agreement relates in a 

                                       8
<PAGE>
 
manner such that the assignor shall remain liable and responsible for the
performance and observance of all its duties and obligations hereunder, or if
the assignor disappears because of such transaction, the assignee must agree to
abide by the terms and conditions of this Agreement.

     8.3  Force Majeure.  Neither party shall be liable to the other for loss or
          -------------                                                         
damages or shall have any right to terminate this Agreement for any default or
delay (including, without limitation, an inability to supply Compounds)
attributable to any act of God, earthquake, flood, fire, explosion, strike,
lockout, labor dispute, casualty or accident, war, revolution, civil commotion,
act of public enemies, blockage or embargo, injunction, law, order,
proclamation, regulation, ordinance, demand or requirement of any government or
subdivision, authority (including, without limitation, drug regulatory
authorities) or representative of any such government, or any other cause beyond
the reasonable control of such party, if the party affected shall give prompt
notice of any such cause to the other party.  The party given such notice shall
thereupon be excused from such of its obligations hereunder as it is so disabled
and for thirty (30) days thereafter. Notwithstanding the foregoing, the
inability of a party to perform due to its failure to comply with any applicable
law, rule, regulation, ordinance, license or permit or order of a court or other
tribunal in effect on the date hereof shall not be deemed to be a force majeure
event.


     8.4  Public Announcements. Copies of press releases or similar written
          --------------------                                             
communications containing a party's name shall be provided to that party prior
to release.  Cutanix may not use Centaur's name or disclose any information
regarding Centaur or its technology or know-how without Centaur's prior written
approval, except as described in the License Agreement.


     8.5  Entire Agreement of the Parties; Amendment.  This Agreement, the Stock
          ------------------------------------------                            
Purchase Agreement, and the License Agreement constitute and contain the entire
understanding and agreement of the parties, and cancel and supersede all prior
agreements, whether oral or written, between the parties respecting the subject
matter hereof.  No waiver, modification or amendment of any provision of this
Agreement shall be valid or effective unless made in writing and signed by a
duly authorized officer of each of the parties.

     8.6  Severability.  In the event any one or more of the provisions of this
          ------------                                                         
Agreement should for any reason be held by any court or authority having
jurisdiction over this Agreement or either of the parties to be invalid, illegal
or unenforceable, such provision or provisions shall be validly reformed by
addition or deletion of wording as appropriate to avoid such result and as
nearly as possible approximate the intent of the parties and, if unreformable,
shall be divisible and deleted in such jurisdiction to the extent necessary to
comply with such holding, and in all other jurisdictions, this Agreement shall
not be affected; provided, however, that no such reformation shall be made if
the effect of such reformation would be such as to fundamentally alter the terms
of this Agreement beyond the intent of the parties.

                                       9
<PAGE>
 
     8.7  Captions.  The captions to this Agreement are for convenience only,
          --------                                                           
and are to be of no force or effect in construing or interpreting any of the
provisions of this Agreement.

     8.8  Notice and Delivery.  Any notice, requests, delivery, approval or
          -------------------                                              
consent required or permitted to be given under this Agreement shall be in
writing and shall be deemed to have been sufficiently given if delivered in
person, delivered by recognized courier, or sent by certified mail, return
receipt requested to the party (which notice shall be considered effective three
(3) days after it is sent) to whom it is directed, or by facsimile transmission
for which evidence of transmission is provided, at its address shown below or
such other address as such party shall have last given by notice to the other
party.


                       If to Centaur, addressed to:
                       President and Chief Executive Officer
                       Centaur Pharmaceuticals, Inc.
                       484 Oakmead Parkway
                       Sunnyvale CA 94086, USA
                       Fax:  408-481-1601

                       If to Cutanix, addressed to:
                       President and Chief Executive Officer
                       Cutanix Corporation
                       484 Oakmead Parkway
                       Sunnyvale CA 94086, USA
                       Fax:  408-567-0478


     8.9  Limitation of Liability.  Neither party shall be liable to the other
          -----------------------                                             
for indirect, incidental or consequential damages arising out of any of the
terms or conditions of this Agreement or with respect to its performance or lack
thereof.

     8.10  Remedies Cumulative.  The remedies provided hereunder are cumulative
           -------------------                                                 
and not exclusive.

     8.11  Governing Law.  This Supply Agreement shall be governed by and
           -------------                                                 
construed in accordance with the laws of the State of California without regard
to the conflict of laws provisions thereof.

                                       10
<PAGE>
 
     IN WITNESS WHEREOF, the parties have caused this Supply Agreement to be
executed by their respective duly authorized officers as of the day and year set
forth below, each copy of which shall for all purposes be deemed to be an
original.


CENTAUR PHARMACEUTICALS, INC.            CUTANIX CORPORATION


By:   /s/ Brian D. Frenzel               By:  /s/ Charles R. Engles
   -----------------------                  ------------------------
   Brian D. Frenzel                         Charles R. Engles
   President and                            President and
   Chief Executive Officer                  Chief Executive Officer

                                       11
<PAGE>
 
                                   SCHEDULE A
                          TERMS AND CONDITIONS OF SALE


     1.  Payment Terms.  All payments shall be made in U.S. dollars.  Payment in
         -------------                                                          
full is due forty-five (45) days after the date of the invoice.  Interest at the
rate of one and one-half percent (1-1/2%) per month will be charged on all
overdue accounts unless a lower rate is required by law.  In case of default of
any payment by Cutanix, Cutanix shall be responsible for all costs of collection
including without limitation attorney's fees and other litigation or settlement
costs.

     2.  Shipment. All Compounds are sold and all prices are F.O.B.
         --------                                                  
manufacturing plant.  Cutanix may, at its option, (a) physically pick up
Compounds at Centaur's factory loading dock upon reasonable notice to Centaur,
(b) arrange for pick up via common carrier at Centaur's factory loading dock
upon reasonable notice or (c) request that Centaur act as Cutanix' agent to
arrange delivery of Compounds.

         If Centaur agrees to act as Cutanix' agent to arrange delivery of
Compounds, (a) Cutanix will provide full address to which Compounds are to be
delivered, (b) all expenses of shipment are for the Cutanix' account, (c) all
shipments will be insured at Cutanix' expense and made at Cutanix' risk and (d)
Cutanix will indemnify, defend and hold harmless Centaur from and against all
claims, losses, liabilities and expenses (including attorneys' fees and other
litigation or settlement costs) arising out of any acts of Centaur while so
acting as Cutanix' agent, except to the extent such claims, losses, liabilities
and expenses are caused by the gross negligence of Centaur.

     3.  Limited Warranty.  Centaur warrants that Compounds delivered under this
         ----------------                                                       
Agreement will be free from any defects for a period of one year after delivery
provided that Cutanix notifies Centaur of any defect within ninety (90) days
after delivery of the goods in question, or if the defect is one which cannot
reasonably be discovered upon delivery, within thirty (30) days after said
defect should reasonably have been discovered but in no event later than one
year after delivery.  Cutanix' failure to timely give the required notice shall
render the warranty ineffective.  This warranty does not extend to any Compounds
which have been subject to misuse, accident or improper handling or storage.
THIS WARRANTY IS IN LIEU OF AND EXCLUDES ALL OTHER WARRANTIES, EXPRESS OR
IMPLIED, ARISING BY OPERATION OF LAW OR OTHERWISE, INCLUDING BUT NOT LIMITED TO
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.  Centaur
shall have no liability for special, indirect, liquidated or consequential
damages (including but not limited to damages for lost profits, or injury to
persons or property).  Centaur's liability under this warranty shall be limited
to replacing the Compounds that are proved to be other than as herein warranted.

                                       12
<PAGE>
 
     4.  Returned Material.  Compounds may be returned only if defective.
         -----------------                                                
Cutanix must contact Centaur prior to return and must request a return
authorization number.  Centaur will pay transportation charges for return of
defective Compounds and delivery of any requested replacement Compounds.
Centaur will use its commercially reasonable efforts to ship replacement
Compounds promptly in accordance with the customary lead time for ordering of
Compounds.  In lieu of shipping requested replacement compounds, Cutanix may
request that Centaur issue a credit memo to Cutanix for the invoiced cost of the
returned goods plus shipping costs.

     5.  Claims, Indemnification.  The liability of Centaur with respect to a
         -----------------------                                             
claim of any kind, whether as to quality or amount of Compounds delivered or for
non-delivery of Compounds, shall not exceed the invoice price of the quantities
of Compounds as to which the claim is made.  Cutanix shall be responsible for
inspecting and testing all Compounds delivered to it hereunder within sixty (60)
days of receipt and before use by Cutanix.  Cutanix assumes all responsibility
and liability for injury or damages resulting from its handling, possession, use
or sale of Compounds supplied hereunder including, but not limited to any injury
or damage resulting from the use of Compounds in Cutanix' manufacturing
operations or in combination with other substances or products, and agrees to
defend and indemnify Centaur from and against all claims, losses, liabilities
and expenses (including attorneys' fees and other litigation or settlement
costs) arising out of such handling, possession, use or sale, except to the
extent such claims, losses, liabilities and expenses are caused by the gross
negligence of Centaur.

                                       13


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