CADUS PHARMACEUTICAL CORP
8-K/A, 1997-05-13
COMMERCIAL PHYSICAL & BIOLOGICAL RESEARCH
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                      SECURITIES AND EXCHANGE COMMISSION
                                       
                            WASHINGTON, D.C. 20549

                                          
                           F O R M   8 - K / A - 1
    
                                       
                                CURRENT REPORT
                                       
                       PURSUANT TO SECTION 13 OR 15 (d)
                                       
                    OF THE SECURITIES EXCHANGE ACT OF 1934
                                       
Date of Report (Date of earliest event reported)      February 25, 1997

                       CADUS PHARMACEUTICAL CORPORATION
                                       
              (Exact name of registrant as specified in charter)
                                       
            Delaware                   0-28674                    13-3660391
(State or Other Jurisdiction          (Commission)             (IRS Employer
       of Incorporation)              File Number)          Identification No.)

777 Old Saw Mill River Road, Tarrytown, New York                 10591-6705
(Address of Principal Executive Offices)                         (Zip Code)

Registrant's telephone number, including area code    (914) 345-3344

                                      N/A
                                       
         (Former name or former address, if changed since last report)
       

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Item 5.  Other Events.

         On February 25, 1997, Cadus Pharmaceutical Corporation (the "Company")
entered into a research collaboration and license agreement with SmithKline
Beecham Corporation and SmithKline Beecham p.l.c. (collectively, "SmithKline").
During the term of the research collaboration, which expires on February 25,
2002, the Company will seek to elucidate the function of orphan G
protein-coupled receptors included within the collaboration and to create
high-throughput screens to discover chemical compounds (i.e., potential drugs)
that interact with these receptors. During the term of the research
collaboration, SmithKline is required to provide the Company with research
funding of $3.0 million each year, adjusted for inflation, and certain other
payments. SmithKline is required to make payments to the Company upon the
achievement of certain research milestones and upon the achievement by
SmithKline of certain drug development milestones. SmithKline is required to pay
the Company royalties on the sale of drugs developed through the use of the
Company's drug discovery technologies.

         SmithKline has the right to extend the term of the research
collaboration for between two and five years by notice to the Company given
prior to February 25, 2001. SmithKline has the right to terminate the research
collaboration after February 25, 1999 (or later under certain circumstances)
("Evaluation Date") if (i) the Company fails to meet certain scientific
objectives in connection with the conduct of the research collaboration or (ii)
fails to perform its obligations in the conduct of the research collaboration in
any material respect and does not cure such failure within a period of 60 days
after receiving notice thereof. In the event of such termination, SmithKline has
no further obligation to provide the Company with funding for the research
collaboration.

         On February 25, 1997, the Company and SmithKline Beecham Corporation
entered into a stock purchase agreement pursuant to which the Company has the
option to sell to SmithKline Beecham Corporation (i) shares of the Company's
common stock valued at $5.0 million during a 90-day period commencing on
February 25, 1998 and (ii) shares of the Company's common stock valued at $5.0
million if it achieves certain scientific objectives prior to the Evaluation
Date.  The Company granted to SmithKline Beecham Corporation certain
registration rights with respect to shares of the Company's common stock which
SmithKline Beecham Corporation may purchase pursuant to the stock purchase
agreement.

                                       2

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Item 7.  Financial Statements, Pro Forma Financial Information and Exhibits.

         (c) Exhibits

         Exhibit  Description


       

         10.1              Research Collaboration and License Agreement among
                           the Company, SmithKline Beecham Corporation and
                           SmithKline Beecham p.l.c., dated as of February 25,
                           1997.*

* Certain information in this exhibit is subject to an application for
  confidential treatment.


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                                    SIGNATURE

                  Pursuant to the requirements of the Securities Exchange Act of
1934, the Registrant has duly caused this report to be signed on its behalf by
the undersigned, thereunto duly authorized.

   
Date:  May 12, 1997
    
                                        CADUS PHARMACEUTICAL CORPORATION

                                        By: /s/ James S. Rielly
                                            ---------------------------------
                                            James S. Rielly

                                            Director of Finance, Controller 
                                            and Treasurer (Authorized Officer 
                                            and Principal Financial Officer)

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                                                                   Exhibit 10.1


  [Note:  Certain portions of this document have been marked with "[c.i.]" to
indicate confidential information for which confidentiality has been requested.
   The confidential portions have been omitted and filed separately with the
                     Securities and Exchange Commission.]


                            RESEARCH COLLABORATION
                                       
                                      AND
                                       
                               LICENSE AGREEMENT
                                       
                                    BETWEEN
                                       
                       CADUS PHARMACEUTICAL CORPORATION
                                       
                                      AND
                                       
                              SMITHKLINE BEECHAM
                                       
                        DATED AS OF FEBRUARY 25th, 1997
                                       

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                               TABLE OF CONTENTS
<TABLE>
<S>      <C>
1.       DEFINITIONS...................................................................2

2.       REPRESENTATIONS AND WARRANTIES...............................................14

3.       COLLABORATIVE RESEARCH PROGRAM...............................................16

4.       DEVELOPMENT AND COMMERCIALIZATION............................................31

5.       GRANT OF LICENSES............................................................38

6.       ROYALTIES AND MILESTONE PAYMENTS.............................................41

7.       PAYMENT AND REPORTS..........................................................46

8.       INFRINGEMENT ACTIONS BY THIRD PARTIES;
              PATENT ENFORCEMENT......................................................48

9.       OWNERSHIP OF INVENTIONS; PATENTS.............................................50

10.      INDEMNIFICATION..............................................................51

11.      PUBLICATION; CONFIDENTIALITY.................................................52

12.      TERM; TERMINATION OF LICENSES................................................56

13.      FORCE MAJEURE AND HARDSHIP...................................................58

14.      MISCELLANEOUS................................................................59
</TABLE>

                                       2

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                            RESEARCH COLLABORATION
                                       
                                      AND
                                       
                               LICENSE AGREEMENT
                                       
     RESEARCH COLLABORATION AND LICENSE AGREEMENT (the "Agreement"), dated as of
February 25th, 1997, by and among SmithKline Beecham Corporation, a Pennsylvania
corporation with its principal offices at One Franklin Plaza, Philadelphia,
Pennsylvania 19101, U.S.A., SmithKline Beecham p.l.c., a corporation organized
under the laws of England and having a place of business at Great West Road,
Brentford, Middlesex, England (collectively "SB" as defined below) and CADUS
Pharmaceutical Corporation, a corporation duly organized and existing under the
laws of the state of Delaware, and having offices at 777 Old Saw Mill River
Road, Tarrytown, New York 10591-6705 ("CADUS" as defined below).

                            PRELIMINARY STATEMENTS

     A. CADUS is the owner of, and has all right, title and interest in, or has
acquired the rights to, certain technology involving the transfection and
expression of certain Targets into yeast, the identification of Surrogate
Ligands and Natural Ligands for certain Targets, and the development of yeast
strains suitable for drug discovery research.

     B. CADUS has research facilities, experienced personnel and other
capabilities conducive to further development of the technology and wishes to
obtain funding therefor, so the technology can be applied commercially.

     C. SB recognizes such technology of CADUS represents a valuable resource
for the identification of gene function and for the discovery of potential
products, and SB is interested in the further development of CADUS Technology
and in obtaining a license for use of Screens in SB's research and development.

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     D. CADUS and SB are entering into this Agreement to provide for CADUS to
conduct further research and development involving CADUS Technology in exchange
for certain funding by SB and for CADUS to license, and SB and its Affiliates to
obtain a license for, the use and practice of Screens in SB's research and
development.

     NOW, THEREFORE, in consideration of the foregoing recitals and the mutual
covenants and agreements of the Parties contained in this Agreement, the Parties
agree as follows:

1.   DEFINITIONS


     As used in this Agreement, the following terms will have those meanings set
forth in this Section 1 unless the context dictates otherwise.

              "Active Substructure" shall mean the minimum pharmacophore that is
responsible for the activity of a Lead Compound or Analog.

              "Affiliate", with respect to any Party, shall mean any Person
controlling, controlled by, or under common control with, such Party. For these
purposes, "control" shall refer to (a) the possession, directly or indirectly,
of the power to direct the management or policies of a Person, whether through
the ownership of voting securities, by contract or otherwise or (b) the
ownership, directly or indirectly, of at least 50% of the voting securities or
other ownership interest of a Person.

              "Analog" of any compound, or of an active component of any
extract, broth or other screening sample, shall mean a compound, or an active
component of any extract, broth or other screening sample, each of which was
derived from a Lead Compound or from knowledge of the structure of a Lead
Compound and in which the Active Substructure of such compound, or such active
component of any extract, broth or other screening sample is conserved with
respect to the Lead Compound.

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              "Annual Research Plan" shall mean the research plan prepared
annually and amended quarterly, if necessary, during the term of the Research
Program as provided in Paragraph 3.1(b).

              "CADUS" shall mean Cadus Pharmaceutical Corporation and any of its
respective Affiliate(s) to which any rights and/or obligations of it shall be
assigned and/or delegated pursuant to this Agreement.

              "CADUS Patents" shall mean all patents and patent applications to
the extent they claim CADUS Technology, which are or become owned by CADUS or to
which CADUS otherwise has, now or in the future, the right to grant licenses.
Included within the definition of CADUS Patents are all continuations,
continuations-in-part, divisions, patents of addition, reissues, renewals,
extensions, registrations, confirmations, reexaminations thereof and any
provisional applications and all SPCs.

              "CADUS Technology" shall mean (a) prior to the Effective Date, all
proprietary inventions, improvements, discoveries, claims, formulae, processes,
trade secrets, technologies, owned by CADUS or to which CADUS has the rights to
grant licenses or sublicenses (including any academic collaborations), and
relating to technology involving the transfection and expression of Targets into
yeast cells and the development of such yeast cells as Screens for the discovery
of potential products; and (b) after the Effective Date, all proprietary

inventions, improvements, discoveries, claims, formulae, processes, trade
secrets, technologies, owned by CADUS or to which CADUS has the rights to grant
licenses or sublicenses, and utilized or arising under the Research Program,
provided CADUS Technology shall not include any SB Technology as defined in
subparagraph (2) of the definition of SB Technology. For the purposes of
clarity, the identity, sequence information, and structure of the Natural Ligand
for any Third Party Target, or other information on the biological function of
such Third Party Target are not CADUS Technology and may be provided by SB to
Third Parties.

                                       3


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              "CADUS's Therapeutic Areas of Interest" shall mean the following
with respect to humans: cancer, autoimmune, allergic and inflammatory diseases.

              "Compound" shall mean any Lead Compound or any Analog of any
Lead Compound.

              "Constitutively active mutant target" shall mean a mutant form
of a receptor that is unlike its naturally occurring counterpart in that it
activates a G protein-mediated signal transduction pathway in the absence of a
ligand at levels significantly above that of its naturally occurring counterpart
at comparable expression levels in yeast.

              "Co-Promotion" shall mean those activities undertaken by a
pharmaceutical company's sales and marketing personnel to implement marketing
plans and strategies aimed at encouraging the appropriate use of a particular
prescription pharmaceutical product and to maximize its commercial value in the
market place. When used as a verb, "Co-Promote" shall mean to engage in such
activities.

              "Effective Date" shall mean the date of this Agreement as set
forth at the beginning of this Agreement.

              "FDA" shall mean the United States Food and Drug Administration,
or the successor thereto.

              "First Commercial Sale" shall mean, with respect to any Product,
the first sale for use or consumption by the general public of such Product.

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              "Gross Profit" shall mean the gross receipts from sales of a Value
Added Product in the Co-Promotion country less (a) normal and customary trade,
quantity and cash discounts actually paid or accrued in accordance with
generally accepted accounting principles consistently applied and allowances or
credits paid to customers on account of rejection or return of the Value Added
Product in accordance with SB's returned goods policy (collectively, "RAR"), (b)
the Local Cost of Goods, and (c) any royalties paid or payable by SB to CADUS or
any other Third Party in connection with the sale of the Value Added Product in
the CoPromotion country. Any accruals for RAR deductions shall be reconciled
with actual results on a quarterly basis and any adjustments shall be reflected
in the subsequent quarter's computation of Gross Profit.

              "IND" shall mean a Notice of Claimed Investigational Exemption for
a New Drug.

              "Invention" shall mean any new or useful process, compound or
composition of matter, patentable or unpatentable, or any improvement thereof,
conceived or first reduced to practice, or demonstrated to have utility during
and in the framework of the conduct of the Research Program.

              "Joint Invention" shall mean any Invention for which it is
determined, in accordance with applicable law, that (i) one or more employees,
consultants or agents of CADUS or any other persons obliged to assign such
Invention to CADUS, and (ii) one or more employees, consultants or agents of SB
or any other persons obliged to assign such Invention to SB, are joint inventors
of such Invention.

              "Key Check Point" shall mean (a) identification by CADUS [c.i.];
and (b) demonstration that CADUS Technology [c.i.]; and (c) demonstration that
[c.i.], each of (a), (b), and (c) being completed by the Key Check Point Date.

                                       5

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              "Key Check Point Date" shall mean the later of (a) the second
anniversary of the Effective Date, or (b) one year after the earlier of (i) the
date SB has performed its obligations under Paragraph 3.5(a) hereof or (ii)
the date the RC has accepted into the Research Program clones of [c.i.]
Targets inserted into appropriate vectors (according to specifications set by
the RC) together with information verifying that the sequence of the Targets
contained in the vectors are correct.

              "Lead Compound" shall mean any compound, an active component of
any extract, broth or other screening sample (including a Surrogate Ligand or
Natural Ligand) identified, or whose biological activity is identified or
confirmed, through the use by SB (or on behalf of SB) or CADUS (pursuant to
Paragraph 3.9(b) or 5.4(a)) of any Screen and which Lead Compound is
biologically active against such Screen and which may be developed for a
therapeutic indication based on the biological activity demonstrated in such
Screen, provided any of the CADUS Technology incorporated in such Screen is
proprietary to CADUS at the time of such use by SB or CADUS as the case may be.

              "Local Cost of Goods" shall mean SB's local cost of goods for

finished packaged stock of the Value Added Product as reported in its local
accounts in the Co-Promotion country (and auditable by independent Third Party
auditors if required) and made up of the transfer price and other related
expenses for the Value Added Product from SB's manufacturing site, provided
always that any such calculations shall have been made in accordance with
generally accepted accounting principles and in accordance with standards
consistently applied by SB for other products in the same category as, or
largely similar to, the Value Added Product.

              "Make, have made, use, and sell" shall mean all exclusionary
rights now or in the future conferred by a patent or equivalent of a patent
(e.g., a SPC), copyright, or trade secret law of each applicable respective
jurisdiction of the world, including but not limited to the right to make, have
made, use, sell, license, import, copy, display, and distribute.


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              "Natural Ligand" shall mean a ligand produced by a human cell or a
human pathogen whose biological activity is identified or confirmed through the
use by SB (or on behalf of SB) or CADUS (pursuant to Paragraphs 3.9(b) or
5.4(a)) of CADUS Technology, which ligand is biologically active against a
Target thereby causing a cellular response and which is reasonably confirmed to
be a ligand for the Target, provided any of such CADUS Technology is proprietary
to CADUS at the time of such use by SB or CADUS as the case may be.

              "NDA" shall mean a New Drug Application.

              "Net Sales" shall mean the gross receipts from sales of Product in
the Territory by SB or sublicensees ("the Selling Party") to Third Parties
(excluding CADUS and its Affiliates):

     (a) in finished product form (i.e., packaged and labeled for sale to the
ultimate consumer); or

     (b) in any product form other than finished product form (such as final
stage bulk material ready for conversion to final form, or bulk tablets, bulk
capsules, bulk ampoules or bulk vials) to distributors who subsequently convert
such product into finished product form and sell to Third Parties, provided that
such distributors shall not be considered sublicensees for purposes of this Net
Sales definition, and further provided that for purposes of this Net Sales
definition, such sales of Product in final stage bulk material form shall only
be deemed to occur where such sales are due to local country requirements as
such requirements are determined by SB; less deductions actually allowed or
specifically allocated to Product by the Selling Party using generally accepted
accounting standards for the following (but for items (i) and (ii) only to the
extent that they were included in the gross invoice price):

                  (i) transportation charges, including insurance, for 

                  transporting Product;
                                       
                                       7


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                  (ii) sales and excise taxes and duties paid or allowed by the
                  Selling Party and any other governmental charges imposed upon
                  the production, importation, use or sale of such Product and
                  paid by the Selling Party;

                  (iii) trade, quantity and cash discounts actually allowed on
                  Product;

                  (iv) allowances or credits to customers on account of
                  rejection or return of Product in accordance with SB's
                  returned goods policy or on account of retroactive price
                  reductions affecting such Product; and

                  (v) Product rebates and Product charge backs including those
                  granted to managed care entities (including Medicaid rebates).

         Any accruals for the foregoing deductions shall be reconciled with
         actual results on a quarterly basis and any adjustments shall be
         reflected in the subsequent quarter's computation of Net Sales.

         Sales between SB and its sublicensees (other than sublicensees that
         are end-users) shall be excluded from the computation of Net Sales
         and no royalties will be payable on such sales. Notwithstanding the
         immediately preceding sentence, it is understood that any transactions
         between SB or any of its or their sublicensees on the one hand and a
         PSB on the other hand will be deemed to be transactions with Third
         Parties for the purposes of computing Net Sales, provided that the
         conditions of such sales to the PSB, including any and all rebates and
         discounts allocated to transactions with the PSB, shall be on an arms
         length basis and such rebates and discounts shall be fully deductible
         in the computation of Net Sales. In the event that any PSB type
         activity is within SB or within any of its Affiliates or its or their
         sublicensees as only part of its or their total activities rather than
         in a separate Affiliate, a notional Net Sales figure will be calculated
         on an arms length basis to cover such activities. The term "PSB" as
         used in this definition shall mean any present or future Affiliate of
         SB or its sublicensees which conducts a pharmaceutical service business
         for or on behalf of Third Parties, including pharmaceutical benefits
         management services (hereinafter "PBM"), wholesaler distribution,
         pharmacy distribution, managed-care services, disease-management
         services, hospital

                                       8
                                       


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         services, or mail-order prescription pharmacy services. As of the
         Effective Date, Affiliates of SB which are included within the
         definition of PBM are Diversified Pharmaceutical Services and
         Diversified Prescription Delivery llc.

                  "Operating Profit" shall mean Gross Profit less deductions for
         (i) the cost to SB for distribution services, (ii) SB's cost for
         providing medical information services in support of the Value Added
         Product; (iii) SB's cost for providing quality control and quality
         assurance services in support of the Value Added Product; (iv) SB's
         cost for providing bids and tender management, formulary listing and
         managed care field force services in support of the Value Added
         Product, and; (vi) the costs incurred by SB in connection with SB's
         provision of physician level sales and marketing data and information
         for the Value Added Product as extracted from SB's data warehouse.
         Salary, salary related expenses or direct costs associated with either
         party's field force shall not be deducted from Gross Profit in
         computing Operating Profit.

                  "Party" shall mean CADUS or SB and, when used in the plural,
         shall mean CADUS and SB.

                  "Person" shall mean any natural person, corporation, firm,
         business trust, joint venture, association, university, organization,
         company, partnership or other business entity, or any government or any
         agency or political subdivision thereof.

                  "Post-Term CADUS Technology/CADUS Patents" shall mean CADUS
         Technology which are Screens transferred to SB during the term of
         the Research Program and CADUS Patents covering such transferred CADUS
         Technology, the license to each of which was granted to SB pursuant to
         Paragraph 5.1 and has expired.

                  "PLA" shall mean a Product License Application.

                                       9


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                      "Project Compound" shall mean a Compound that has received
         approval as a pre-clinical development candidate pursuant to the then
         applicable internal policies and procedures of SB.

                      "Product" shall mean any product which uses as one of its

         active ingredients a Compound which is developed by or on behalf of SB,
         each developed for a therapeutic indication based on the biological
         activity demonstrated by the relevant Lead Compound or the Natural
         Ligand in the relevant Screen.

                      "Promotional Expenses" shall mean any actual pre or post
         Value Added Product launch out of pocket promotional expenses
         (including the cost of the Value Added Product samples calculated at
         the Local Cost of Goods) by either party, which are set forth in any
         annual Marketing Plan, accounted for according to generally accepted
         accounting principles and approved by the Marketing Committee related
         to the marketing and Co-Promotion of the Value Added Product in the
         Co-Promotion country. Promotional Expenses shall include, among other
         things, actual costs for printing of promotional and training
         materials, services provided by third parties (e.g. advertising);
         symposia; the cost of any Phase IV post-marketing clinical studies,
         compassionate use program and/or indigent patient programs (including
         the cost of the Value Added Product samples calculated at the Local
         Cost of Goods).

                      "Proprietary" shall mean, with respect to intellectual
         property, intellectual property that is (in whole or in part) a trade
         secret, covered by the claims of an issued patent or covered by the
         claims of a patent application at the relevant time.

                      "Research Committee" shall have the meaning set forth in
         Section 3.2 hereof.
                                       
                                      10


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                      "Research Program" shall mean all of the research
         activities conducted by CADUS, or by CADUS in collaboration with SB and
         its Affiliates for the benefit of SB and its Affiliates, which are
         undertaken pursuant to Section 3 of this Agreement.

                      "Royalty Term" shall mean, with respect to each Product in
         each country in the Territory, the period of time commencing on the
         date of the First Commercial Sale of such Product in such country and
         ending on the later of (i) ten (10) years from such date, and (ii) the
         date on which the last to expire of Valid Claims covering such Product
         in such country expires.

                      "SB" shall mean, collectively, SmithKline Beecham
         Corporation, SmithKline Beecham p.l.c, and any of their respective
         Affiliate(s) to which any rights and/or obligations of either of them
         shall be assigned and/or delegated pursuant to this Agreement.

                      "SB Patents" shall mean all patents and patent

         applications to the extent they claim SB Technology, which are or
         become owned by SB or to which SB otherwise has, now or in the future,
         the right to grant licenses. Included within the definition of SB
         Patents are all continuations, continuations-in-part, divisions,
         patents of addition, reissues, renewals, extensions, registrations,
         confirmations, reexaminations thereof and any provisional applications
         and all SPCs.

                      "SB Technology" shall mean (1) any and all proprietary
         data, substances, processes, materials, formulas, know-how, inventions
         and information derived from the use of CADUS Technology by SB,
         provided such data, substances, processes, materials, formulas,
         know-how, inventions and information are not included in subparagraph
         (2) of this definition ; (2) Third Party Targets, Substances associated
         with such Third Party Targets, and any and all data, substances,
         processes, materials, formulas, know-how, inventions and information
         based on the

                                      11


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         use of or derived from the use of Third Party Targets and/or Substances
         associated with such Third Party Targets developed by or for either
         party arising out of the performance of the Research Program; and (3)
         SB Targets and Substances (except those Substances in subparagraph (2))
         provided to CADUS by SB pursuant to the Research Program.

                      "Screen" shall mean any screening assay which incorporates
         a Target and which was developed by CADUS, alone or with any
         collaboration by SB, during the term of the Research Program, or
         otherwise provided to SB by CADUS and accepted by SB as a screening
         assay during the term of the Research Program.

                      "SPCs" shall mean a right based upon a patent to exclude
         others from making, using or selling a product, process, substance,
         composition or service, such as a Supplementary Protection Certificate.

                      "Stock Purchase Agreement" shall mean the Stock Purchase
         Agreement, dated as of the Effective Date, between CADUS and SmithKline
         Beecham Corporation.

                      "Substances" shall have the meaning  set forth in Section
         3.10 hereof.

                      "Surrogate Ligand" shall mean any agonist molecule whose
         biological activity is identified or confirmed by CADUS through the use
         of CADUS Technology or SB Technology licensed to CADUS pursuant to
         Paragraph 5.3 or 5.4 and which is biologically active against a Target
         thereby causing a cellular response and which is not a Natural Ligand

         or Analog of such Natural Ligand for such Target.

                      "Takeda" shall mean Takeda Chemical Industries, Ltd., a
         corporation organized under the laws of Japan, having a principal place
         of business at 1-1, Doshomachi 4-Chome, Chuo-ku, Osaka, 541, Japan, and
         its Affiliates.

                                      12


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                      "Target" shall mean any confirmed or putative orphan G
         protein-coupled receptor and shall include only such SB Targets, Third
         Party Targets, CADUS Targets or Other Targets as are actually included
         in the Research Program pursuant to Paragraph 3.1(c) and which have not
         been excluded or withdrawn by CADUS or SB pursuant to Paragraph 3.1(c).

                      (a) "SB Target" shall mean a Target which is proprietary
         in whole or in part to SB and that is provided by SB to CADUS for use
         in the Research Program pursuant to this Agreement and which is not a
         Third Party Target.

                      (b) "Third Party Target" shall mean a Target which is
         proprietary in whole or in part to a Third Party and to which SB has
         obtained from each such Third Party the right to use in the Research
         Program and that is provided by SB to CADUS for use in the Research
         Program pursuant to this Agreement. For the purposes of this Agreement,
         all Third Party Targets are deemed to be proprietary to a Third Party.

                      (c) "Other Target" shall mean a Target, other than an SB
         Target, Third Party Target, or CADUS Target, that is provided by SB to
         CADUS or is provided by CADUS to SB for use in the Research Program
         pursuant to this Agreement.

                      (d) "CADUS Target" shall mean a Target which is
         proprietary in whole or in part to CADUS and that is provided by CADUS
         to SB for use in the Research Program pursuant to this Agreement.

                      "Territory" shall mean the entire world.

                      "Third Party" shall mean any Person who or which is
         neither a Party nor an Affiliate of a Party.

                                      13


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                      "Valid Claim" shall mean a claim of any SB Patent or CADUS
         Patent, as the case may be, which has not been held invalid or
         unenforceable by final decision of a court or other governmental agency
         of competent jurisdiction, unappealable or unappealed within the time
         allowed for appeal, and which is not admitted to be invalid or
         unenforceable through reissue, disclaimer or otherwise.

                      "Value Added Product" shall mean individually or 
         collectively Value Added Target Product, Value Added Peptide Product, 
         and Value Added CADUS Product.

                      (a) "Value Added Target Product" shall mean a Product
         wherein the relevant Screen incorporated a CADUS Target.

                      (b) "Value Added Peptide Product" shall mean a Product
         which is a peptide Surrogate Ligand, a rationally designed peptide
         analog of such peptide Surrogate Ligand, or a rationally designed
         non-peptide Analog of such peptide Surrogate Ligand, provided that such
         Value Added Peptide Product does not include a Natural Ligand to the
         Target used in the screen or any Analog of such Natural Ligand.

                      (c) "Value Added CADUS Product" shall mean a Product
         (other than a Value Added Peptide Product) where the Compound was
         provided to SB by CADUS pursuant to Paragraphs 3.9(b)(1) and 5.4(b).

         2.   REPRESENTATIONS AND WARRANTIES.

              2.1     Representations and Warranties of Both Parties
         Each Party represents and warrants to the other Party that: (i) it is
         free to enter into this Agreement; (ii) in so doing, it will not
         violate any other agreement to which it is a party

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         that would materially and adversely affect its ability to perform under
         this Agreement; (iii) it has taken all corporate action necessary to
         authorize the execution and delivery of this Agreement and the
         performance of its obligations under this Agreement; and (iv) this
         Agreement constitutes a valid and binding obligation of such Party and
         is enforceable against it in accordance with its terms.

              2.2     Representations and Warranties of CADUS

              CADUS hereby represents and warrants to SB that:

                      (a) It is the owner, or licensee, of the CADUS Technology
         existing on the Effective Date and has the right to grant licenses 

         therefor;

                      (b) All CADUS Patents have been maintained to date and, to
         the best of its knowledge, all CADUS Patents licensed to CADUS have
         been maintained to date;

                      (c) During the term of the Research Program it shall
         maintain the licenses to CADUS Technology licensed to it and referred
         to in subparagraph (a) and it shall maintain the licenses to CADUS
         Patents licensed to it and referred to in subparagraph (b);

                      (d) It is not aware of any asserted or unasserted claim or
         demand which it believes can be enforced against such CADUS Patents;

                      (e) To the best of its knowledge, the practice of such
         CADUS Patents during the conduct of the Research Program does not
         infringe upon or conflict with any patent or other enforceable
         proprietary rights of any Third Party, except that SIBIA Neurosciences,
         Inc. has commenced a patent infringement litigation claiming that CADUS
         is infringing U.S. Patent No. 5,401,629 owned by SIBIA Neurosciences,
         Inc.

                                      15


<PAGE>




         (which also owns a related patent U.S. Patent No. 5,436,128) (although
         neither Party acknowledges infringement or validity of such patents);

                      (f) During the Research Program, it shall use its
         reasonable best efforts to take licenses to patents and technology of
         Third Parties (other than the patents referred to in subparagraph (e))
         which patents are reasonably necessary in order to use the CADUS
         Technology in the conduct of the Research Program, provided such
         licenses are available to CADUS on commercially reasonable terms and in
         no event shall this Paragraph 2.2(f) be construed as an obligation of
         CADUS to take any licenses to Targets or Compounds; and

                      (g) It has not entered into any agreement with any Third
         Party which is in conflict with any of the rights granted to SB and its
         Affiliates pursuant to this Agreement.

              2.3     Representations and Warranties of SB

         SB hereby represents and warrants to CADUS that it is the owner of, or
         has the rights to include in the Research Program, all SB Targets and
         Third Party Targets.

         3.   COLLABORATIVE RESEARCH PROGRAM


              3.1     Scope of Research Program

              (a) The Research Program is a program for collaborative research
         under which CADUS and SB will carry out the research agreed upon by the
         Parties directed at Targets during the term of the Research Program (as
         defined in Paragraph 3.8). SB has the right, under the Research
         Program, to have CADUS conduct research on [c.i.] during the initial
         term of the Research Program and [c.i.] any extension of the Research
         Program pursuant to Paragraph 3.8. Promptly after the Effective Date SB
         shall have the right to submit to CADUS [c.i.] confirmed or putative
         orphan G protein-coupled

                                      16


<PAGE>




         receptors for inclusion into the Research Program and such receptors
         shall be Targets provided they are not excluded or withdrawn as
         provided in this Section 3. SB shall have the right to replace any of
         such [c.i.] receptors which are excluded or withdrawn as provided in
         this Section 3.

              (b) Prior to the commencement of the Research Program and
         thereafter prior to the commencement of each calendar year, the
         Research Committee shall prepare and provide to each Party, in form and
         substance mutually acceptable to each Party, an outline of the goals
         and scope of the research to be undertaken during the upcoming year,
         together with a detailed description of the specific research
         activities to be undertaken (an "Annual Research Plan"). The Parties
         intend that the Annual Research Plan will also contain a list of
         selected Targets (specifying, to the extent possible, whether they are
         SB Targets, Third Party Targets, CADUS Targets or Other Targets).

              (c) The Annual Research Plan for the period commencing on the
         Effective Date and ending on one (1) year after the Effective Date will
         be prepared by the Research Committee as soon as possible after the
         Effective Date and provided to each party. The Research Committee may
         revise each Annual Research Plan quarterly. The Annual Research Plan
         and the Key Check Point may be amended only with the unanimous consent
         of the Research Committee. If the Research Committee cannot reach
         unanimity as to whether or not to amend an Annual Research Plan or Key
         Check Point, it shall not be amended. SB, in consultation with CADUS,
         will decide the Targets to be included (the RC shall finally select the
         Targets to be included pursuant to Paragraph 3.2) and the priorities
         within the Research Program. CADUS shall have the right to exclude from
         the Research Program Targets CADUS has previously committed to a Third
         Party (i.e., prior to being proposed by SB pursuant to Paragraph
         3.1(a)) on an exclusive basis. CADUS shall also have the right to
         exclude from the Research Program Targets CADUS has previously
         committed to a Third Party on a non-exclusive basis, unless SB

         specifically indicates in writing that it accepts inclusion of such
         Target on a non-

                                      17

<PAGE>

         exclusive basis. SB can withdraw a Target from the Research Program
         at any time provided CADUS has not begun to make a Screen
         incorporating such Target (i.e., has not initiated a search for a
         Surrogate Ligand for such Target), in which event CADUS will have the
         right to conduct research on such Target for itself or a Third Party as
         if such Target had never been included in the Research Program provided
         CADUS does not use any SB Technology other than that licensed to CADUS
         pursuant to Paragraph 5.3. SB or CADUS can exclude or withdraw a Target
         from the Research Program at any time if it reasonably believes the use
         of such Target infringes a valid patent of a Third Party, in which
         event CADUS will have the right to conduct research on such Target for
         such Third Party provided SB and not CADUS was the one to withdraw the
         Target and CADUS does not use any SB Technology other than that
         licensed to CADUS pursuant to Paragraph 5.3.

              (d) If the Research Committee fails to agree on an Annual Research
         Plan the matter shall be referred for further review and resolution to
         the Sr. Vice President of Biopharmaceutical Research & Development of
         SB, or such other similar position designated by SB from time to time,
         and the Chief Executive Officer of CADUS, or such other similar
         position designated by CADUS from time to time. Until the Sr. Vice
         President of Biopharmaceutical Research & Development of SB and the
         Chief Executive Officer of CADUS make a joint decision, and in the
         absence of such a decision, SB shall continue to provide funding to
         CADUS for the Research Program at the same level of funding as provided
         during the previous year, in accordance with Paragraph 3.3, and CADUS
         shall continue to conduct the Research Program in accordance with the
         goals and scope of the research described therein and shall continue
         staffing and non-staffing resource levels consistent with previous
         staffing and non-staffing resource levels.


                                      18

<PAGE>


              3.2     Research Committee

              (a) The Parties shall establish a Research Committee (the
         "Research Committee" or "RC"), which shall be comprised of eight (8)
         members: (I) four (4) SB representatives designated by SB promptly
         after the Effective Date, (ii) the Vice President of Research at CADUS,
         or such other similar position designated by CADUS from time to time,
         and (iii) three (3) additional CADUS representatives designated by
         CADUS. Members of the Research Committee may be represented at any
         meeting by a designee appointed by such member for such meeting, if

         such member is unable to attend such meeting. The chairperson of the
         Research Committee shall be designated annually on an alternating basis
         between the Parties. The Party not designating the chairperson shall
         designate one (1) of its representative members as secretary to the
         Research Committee for such year. Each Party shall be free to change
         its representative members, on written notice to the other Party,
         provided that it does so in compliance with this Paragraph 3.2. The
         Research Committee shall exist until the termination or expiration of
         the term of the Research Program. Each party may bring additional nonRC
         representatives to meetings as appropriate.

              (b) Responsibilities. The Research Committee shall be responsible
         for preparing the Annual Research Plan (based on priorities set by SB
         and taking into account CADUS's views as to the feasibility of the
         scope and timing of research activities and objectives), monitoring and
         adapting the Annual Research Plan based on the results and progress of
         the Research Program, establishing long-term objectives for the
         Research Program and evaluating the progress of the Research Program in
         accordance with Paragraph 3.1(b), including, without limitation:

                      (1) Deciding the direction and objectives of the Research
         Program;

                                      19


<PAGE>




                      (2) Promptly determining if the research milestones of
         Paragraph 3.3(g) have been met after notice to the RC by CADUS that
         such research milestone has been met;

                      (3) Providing ongoing scientific guidance to the Research
         Program;

                      (4) Providing a forum for the exchange of scientific
         information among the scientists participating in the Research Program;
         and

                      (5) Finally selecting which receptors that are submitted
         by SB pursuant to Paragraph 3.1(a) are to be included in the Research
         Program. It is understood that any disputes under this subparagraph (5)
         are subject to the dispute resolution mechanism set forth under
         Paragraph 3.2(d) and not Paragraph 3.1(d).

              (c) Meetings. During the term of the Research Program, the
         Research Committee shall meet at least twice per year, and more
         frequently as the Parties deem appropriate, on such dates and at such
         times as the Parties shall agree. In addition, the parties will meet at
         SB for an annual review of the Research Program. At such meetings, the
         Research Committee shall, among other things, discuss the progress of

         and plans for the Research Program and seek to agree on the specific
         research activities to be undertaken. The meetings shall be held at
         locations that are agreed upon by the Parties. The chairperson shall be
         responsible for sending notices of meetings to all members. The
         Research Committee may also convene or be polled or consulted from time
         to time by means of telecommunications or correspondence. If, at SB's
         request, a meeting of the Research Committee is held at a location that
         is further from CADUS than SB's King of Prussia R&D facilities, SB
         shall reimburse CADUS for the reasonable travel and lodging expenses of
         CADUS personnel who attend such meeting, promptly upon receipt of
         appropriate invoices therefor.

                                      20


<PAGE>




              (d) Decisions of the Research Committee.

                      (1) All decisions of the Research Committee shall be made
         by unanimous agreement of the members (or their designees) present in
         person or by telephone at any meeting; provided that at least two (2)
         representatives of each Party are present at such meeting.

                      (2) In the event that unanimity cannot be reached by the
         Research Committee with respect to a matter that is subject to its
         decision-making authority (other than a decision whether or not to
         amend the Annual Research Plan or the Key Check Point, which decision
         is specifically covered by Section 3.1(c) hereof), then the decision
         shall be referred for further review and resolution to the Sr. Vice
         President of Biopharmaceutical Research & Development at SB, or such
         other similar position designated by SB from time to time, and the
         Chief Executive Officer at CADUS, or such other similar position
         designated by CADUS from time to time. If they cannot resolve the
         decision at issue within thirty (30) days, the matter will be referred
         to arbitration pursuant to Section 14.14, unless the matter is the
         failure to agree on an Annual Research Plan (which matter is governed
         by Section 3.1(d) hereof).

              (e) Reports. Within thirty (30) days after each Research Committee
         meeting, the secretary of the Research Committee shall prepare and
         distribute minutes of the meeting which shall provide a description in
         reasonable detail of the discussions had at the meeting and a list of
         any actions, decisions or determinations approved by the Research
         Committee. Such reports shall be distributed to the members of the
         Research Committee and the Chief Executive Officer of CADUS and the Sr.
         Vice President of Biopharmaceutical Research & Development at SB.

                                      21



<PAGE>




              3.3     Funding of the Research Program

              (a) SB shall pay to CADUS a one time, non-refundable Two Million
         US Dollar (US$2,000,000.00) CADUS Technology development fee in one
         installment on February 15, 1998.

              (b) SB shall provide funding to CADUS for the conduct of the
         Research Program in the amount of Two Million Five Hundred Thousand
         Dollars ($2,500,000), as adjusted as set forth below, each year during
         the term of the Research Program (as defined in Paragraph 3.8); and
         CADUS shall use such funding for the conduct of the Research Program.
         The annual level of funding to be provided by SB shall be adjusted
         annually commencing with calendar year 1998 to reflect a four (4%)
         percent increase per annum.

              (c) SB shall provide the funding in Paragraph 3.3(b) in quarterly
         installments equal to twenty-five percent (25%) of the then annual
         level of funding, in advance on the first day of January, April, July
         and October of each year. However, the first payment shall be made in
         the amount of $243,056 within thirty (30) days of the Effective Date of
         this Agreement (in lieu of any payment on January 1, 1997), which
         amount is $625,000 multiplied by a fraction the numerator of which is
         the number of days from the Effective Date through March 31, 1997 and
         the denominator of which is 90.

              (d) SB shall also pay to CADUS an amount equal to twenty percent
         (20%) of each payment due under Paragraph 3.3 (b) payable as follows:

                      (1) On January 1, 1998, SB shall pay to CADUS an amount
         equal to twenty percent (20%) of all payments due under Paragraph
         3.3(c) through and including January 1, 1998; and

                                      22


<PAGE>




                      (2) The remaining payments due to CADUS under this
         Paragraph 3.3(d) shall be due quarterly at the same time as the
         quarterly payments due under Paragraph 3.3(c).

              (e) CADUS shall pay for all out-of-pocket expenses it incurs in
         connection with the Research Program other than the following which
         shall be paid by SB: (1) the cost of material, processes or equipment
         obtained or licensed by CADUS from Third Parties at the specific
         written request of SB, (2) the out-of-pocket cost of synthesizing

         peptides, except for initial testing quantities of such peptides, if
         synthesis of such peptides by or for CADUS is requested by SB in
         writing; and (3) travel and lodging expenses incurred by CADUS
         employees, consultants or advisors in connection with travel requested
         by SB pursuant to Paragraphs 3.2(c), 3.7 or otherwise if such travel is
         to a location that is further from CADUS than SB's King of Prussia R&D
         facilities. CADUS shall have the right to use, for its own purposes
         that are unrelated to the Research Program, any such material,
         processes or equipment obtained or licensed by it from Third Parties at
         the request of SB, provided that CADUS shall pay for any additional
         expenses arising from such use. CADUS shall not request SB, and SB
         shall not be obligated, to pay for material or equipment CADUS
         ordinarily employs in the use of CADUS Technology and ordinarily
         expects to employ during the term of the Research Program.

              (f) Funding for use of CADUS Technology after the term of the
         Research Program

              If SB wishes to use Post-Term CADUS Technology/CADUS Patents after
         the term of the Research Program pursuant to Paragraph 5.2, SB shall so
         notify CADUS at least forty-five (45) days prior to each year during
         which it wishes to use it. SB shall pay to CADUS a fee of One Million
         US Dollars (US $1,000,000) (within thirty (30) days of invoice of such
         fee from CADUS) for each year that SB wishes to use such Post-Term
         CADUS Technology/CADUS Patents up to a maximum of Five Million US
         Dollars (US

                                      23


<PAGE>




         $5,000,000). Such fee shall be due and payable within thirty (30) days
         after CADUS delivers to SB an invoice therefore, but no earlier than
         the first day of such year. After SB has paid to CADUS Five Million US
         Dollars (US $5,000,000) pursuant to this Paragraph 3.3(f), SB shall
         have a perpetual, fully paid-up license to use Post-Term CADUS
         Technology/CADUS Patents pursuant to Paragraph 5.2.

              (g) Research Milestone Payments

              SB shall pay to CADUS the following research milestone payments
         within thirty (30) days of the occurrence of each event (as determined
         by the Research Committee pursuant to Paragraph 3.2(b) (2)) set forth
         below:

                      (1) [c.i.] each time that SB receives from CADUS a
         Surrogate Ligand for each of [c.i.] separate Targets (i.e. [c.i.]
         Surrogate Ligands) each of which (i) [c.i.]; or (ii) does not meet the
         criteria of subparagraph 3.3(g)(1)(i) but which is used by SB, provided
         SB successfully establishes a Screen with such Surrogate Ligand and

         that SB directs (through the RC) that CADUS cease efforts to generate a
         Surrogate Ligand for that Target that meets the requirements of
         subparagraph 3.3(g)(1)(i); and

                      (2) [c.i.] received by SB from CADUS, provided a payment
         for such Target has not been made under subparagraph (1) above and
         further provided that the SB has directed in writing the preparation of
         such [c.i.]; and

                      (3) [c.i.] upon the first identification by SB of a
         Natural Ligand for each of [c.i.] different Targets (i.e. [c.i.]
         Natural Ligands) (SB being obligated to promptly notify CADUS of each
         such identification); and

                      (4) [c.i.] upon the identification by SB of a Natural
         Ligand for each subsequent set of [c.i.] Targets (SB being obligated to
         promptly notify CADUS of each

                                      24


<PAGE>




         such identification) provided such [c.i.] Targets are different than
         the Targets included in subparagraph (3) and any Targets previously
         included in this subparagraph (4); and

              The total payments made by SB under subparagraphs 3.3 (g)(1) - (4)
         shall not exceed Fifteen Million US Dollars (US$15,000,000.00).
         Further, once SB has paid to CADUS Five Million US Dollars
         (US$5,000,000.00) under subparagraphs 3.3(g)(1), (2), (3), and/or (4),
         SB at its option, in lieu of paying the next Five Million US Dollars
         (US$5,000,000.00) due under subparagraphs 3.3(g)(1), (2), (3), and/or
         (4), may from time to time (as such payments become due) purchase from
         CADUS in private placements up to Five Million US Dollars
         (US$5,000,000) worth of CADUS common stock under the terms of the Stock
         Purchase Agreement.

              (h) Stock Purchase

         SB has granted to CADUS the right to sell CADUS common stock to SB in
         private placements pursuant to the terms of the Stock Purchase
         Agreement.

              3.4     Conduct of Research Program by CADUS

         During the term of the Research Program, so long as SB is providing
         funding pursuant to Section 3.3, CADUS shall:

              (a) diligently perform its obligations under the Research Program,
         as set forth in any Annual Research Plan and in good faith pursue

         generation of Screens for Targets as accepted and prioritized by the
         RC, and such other activities which, from time to time, the Research
         Committee decides is necessary for the success of the Research Program;

              (b) use all reasonable efforts and proceed diligently to perform
         the work set out for CADUS to perform in the Annual Research Plan,
         using personnel with sufficient qualifications, skills and experience,
         together with sufficient equipment and facilities, to

                                      25


<PAGE>




         carry out its obligations under the Research Program and to accomplish
         the objectives of the Research Program and in furtherance thereof,
         CADUS intends [c.i.] provided Targets have been accepted in to the
         Research Program on a timely basis.;

              (c) conduct the Research Program in a good scientific and
         professional manner, and in compliance with all requirements of
         applicable laws, rules and regulations, and all other requirements of
         any applicable good laboratory practices to attempt to achieve its
         objectives efficiently and expeditiously;

              (d) furnish SB with all Screens arising from the Research Program;

              (e) within thirty (30) days following the end of each calendar
         quarter during the term of the Research Program (commencing with the
         calendar quarter ending June 30, 1997), furnish SB with written reports
         summarizing all activities under the Research Program during such
         quarter;

              (f) provide to the Research Committee at each meeting thereof a
         written report summarizing all of the material activities of CADUS
         using the Screens since the period covered by the previous report;

              (g) as soon as practicable provide an invention disclosure report
         to SB with respect to any Joint Invention;

              (h) allow representatives of SB, upon reasonable notice and during
         normal business hours, to (1) visit the facilities where the Research
         Program is being conducted, and (2) consult informally, during such
         visits and by telephone, with CADUS personnel performing work on the
         Research Program;

                                      26


<PAGE>





              (i) maintain liability insurance with respect to the work it is
         performing under the Research Program in such amounts as it customarily
         maintains with respect to similar research programs, which insurance
         shall designate SB as an "insured", and to pay the premiums due
         thereunder; and

              (j) not submit receptors for use in the Research Program that such
         party knows infringes or conflicts with a patent or other enforceable
         proprietary right of a Third Party in the United States.

              3.5     Conduct of Research Program by SB

         During the term of the Research Program (and thereafter with respect to
         Paragraph 3.5(g) only), SB shall:

              (a) by one (1) year from the Effective Date (1) provide to CADUS
         clones of [c.i.] Targets inserted into appropriate vectors (according
         to specifications set by the RC but in no event more than [c.i.]
         vectors per clone unless otherwise specified by the RC for a particular
         Target) together with available quantities of the oligonucleotides used
         (if any) by SB to accomplish this; and (2) verify that the sequences of
         the Targets contained in the vectors are correct and provide to CADUS
         this information together with any sequencing oligonucleotides (as may
         be available) created for such Targets.

              (b) use all reasonable efforts to perform the work and provide the
         Substances set out for SB to perform and provide in any Annual Research
         Plan, and undertake such other activities which, from time to time, the
         Research Committee decides is necessary for the success of the Research
         Program;

                                      27


<PAGE>




              (c) not submit receptors for use in the Research Program that such
         party knows infringes or conflicts with a patent or other enforceable
         proprietary right of a Third Party in the United States.

              (d) as soon as practicable provide an invention disclosure report
         to CADUS with respect to any Joint Invention;

              (e) provide to the Research Committee at each meeting thereof a
         written report summarizing all of the material activities of SB using
         the Screens since the period covered by the previous report;

              (f) allow representatives of CADUS, upon reasonable notice and

         during normal business hours, to (1) visit the facilities where the
         Screens are being used, and (2) consult informally, during such visits
         and by telephone, with SB personnel performing work in connection with
         the Research Program; and

              (g) notify CADUS when a Compound becomes a Project Compound and
         update CADUS with respect to such at reasonable intervals thereafter

              3.6     Records

              (a) CADUS shall maintain records, in sufficient detail and in good
         scientific manner, which shall be complete and accurate and shall fully
         and properly reflect all work done and results achieved in the
         performance of the Research Program (including all data in the form
         required under all applicable laws and regulations).

              (b) SB shall have the right, during normal business hours and upon
         reasonable notice, to inspect and copy all records of CADUS referred to
         in Section 3.6(a) above. SB shall maintain such records and the
         information of CADUS contained therein in

                                      28


<PAGE>




         confidence in accordance with Section 11 and shall not use such records
         or information except to the extent otherwise permitted by this
         Agreement.

              3.7     Training

         During the term of the Research Program and if requested in writing by
         SB, CADUS shall provide training to SB personnel to enable them to use
         the Screens provided to SB by CADUS pursuant to the Research Program;
         provided, however, that CADUS shall not be obligated to train more than
         two (2) SB personnel at its site at any one time and that CADUS shall
         not be responsible to pay the travel, lodging, and other expenses of SB
         personnel.

              3.8     Term of Research Program

              (a) The term of the Research Program shall commence on the
         Effective Date, and shall continue, except as otherwise provided in
         this Agreement, until the fifth anniversary of the Effective Date. SB
         shall have the right, in its sole discretion, to extend the term of the
         Research Program for such number of whole calendar years as shall not
         exceed five (5) years and as shall not be less than two (2) years. SB
         may so extend the term of the Research Program by sending written
         notice to CADUS specifying the number of years by which the term is
         being extended, prior to the fourth anniversary of the Effective Date.


              (b) Upon termination of the Research Program under this Paragraph,
         CADUS shall return to SB or destroy all Substances transferred to CADUS
         by SB, SB Targets and Third Party Targets and all Screens in its
         possession or control that incorporate such Substances, SB Targets
         and/or Third Party Targets including sequence and other related
         information and will cease all use thereof.

              3.9     Exclusivity

                                      29


<PAGE>




              (a) During the term of the Research Program, CADUS shall not
         develop or make available, with or for the benefit of any Third Party,
         any Screens or any screens involving any Targets or conduct any other
         work with respect to such Targets worked on under the Research Program
         or included in the Research Program pursuant to this Agreement, except
         as otherwise consented to in writing by SB. Notwithstanding the
         foregoing and subject to Paragraph 5.1, if SB extends the term of the
         Research Program, CADUS shall have the right, after the fifth
         anniversary of the Effective Date, to develop or make available, with
         or for the benefit of any Third Party, any Screen involving any Other
         Targets or CADUS Targets worked on under the Research Program, provided
         SB is not actively using such Screens or has not identified or
         confirmed the biological activity of any Compound or Product using such
         Screens that SB or one of its Affiliates is actively researching,
         developing, marketing or having marketed. For the purposes of this
         Paragraph 3.9(a), a Target shall include, without limitation, [c.i.].

              (b) (1) CADUS may initiate screening using Targets pursuant to the
         Research Program on behalf of SB upon the written approval of SB on a
         Target by Target basis.

                      (2) CADUS shall have the right to use Screens, without the
         prior written approval of SB, solely for the purpose of identifying
         Surrogate Ligands under the Research Program pursuant to Paragraph
         5.4(a)(1).

              3.10    Material Transfer

         In order to facilitate the Research Program, either Party may provide
         to the other Party certain biological materials or chemical compounds
         including, but not limited to, Targets (collectively, "Substances")
         owned by or licensed to the supplying Party (other than under this
         Agreement) for use by the other Party in furtherance of the Research
         Program. Except as otherwise provided under this Agreement, all such
         Substances delivered to the other Party (1) shall remain the sole
         property of the supplying Party, (2) shall be used only in furtherance

         of the Research Program and solely under the control

                                      30


<PAGE>




         of the other Party, (3) shall not be used or delivered to or for the
         benefit of any Third Party without the prior written consent of the
         supplying Party, and (4) shall not be used in research or testing
         involving human subjects by the receiving party. The Substances
         supplied under this Paragraph 3.10 must be used with prudence and
         appropriate caution in any experimental work, since not all their
         characteristics may be known. THE SUBSTANCES ARE PROVIDED "AS IS"
         AND WITHOUT ANY REPRESENTATION OR WARRANTY, EXPRESS OR IMPLIED,
         INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTY OF MERCHANTABILITY
         OR OF FITNESS FOR ANY PARTICULAR PURPOSE OR ANY WARRANTY THAT THE USE
         OF THE SUBSTANCES WILL NOT INFRINGE OR VIOLATE ANY PATENT OR OTHER
         PROPRIETARY RIGHTS OF ANY THIRD PARTY.

              3.11    Liability

         During the Research Program, each Party shall be responsible for, and
         hereby assumes, any and all risks of personal injury, death or property
         damage caused by the negligent or willful acts or omissions of that
         Party or its Affiliates, and their respective directors, officers,
         employees or agents.

              3.12    Termination of Research Program by SB

              (a) In the event that the Key Check Point is not achieved by the
         Key Check Point Date, SB shall have the right to give notice to CADUS
         of such failure. SB shall be entitled, without prejudice to any of its
         other rights conferred on it by this Agreement, in addition to any
         other remedies available to it by law or in equity, to terminate the
         rights and obligations of the Parties set forth in Section 3 (other
         than those in Paragraph 3.3(f) and 3.3(g)) of this Agreement by giving
         written notice within ninety (90) days of such date to take effect
         immediately upon delivery of such notice.

              (b) After the Key Check Point Date, if CADUS fails to perform its
         obligations under Paragraph 3.4 hereof in any material respect, SB
         shall have the right to give

                                      31


<PAGE>




         notice to CADUS of such default. If such default is not cured within
         sixty (60) days after such notice is given, SB shall be entitled,
         without prejudice to any of its other rights conferred on it by this
         Agreement, in addition to any other remedies available to it by law or
         in equity, to terminate the rights and obligations of the Parties set
         forth in Section 3 (other than those in Paragraph 3.3(f) and 3.3(g)) of
         this Agreement by giving written notice of termination to take effect
         immediately upon delivery of such notice.

              (c) Upon such termination under Paragraph 3.12(a) or (b), (1)
         CADUS shall have no further obligation to conduct the Research Program;
         (2) SB shall have no further obligations to fund the Research Program
         under Paragraphs 3.3(b), 3.3(d) and 3.3(e); and (3) CADUS shall return
         to SB or destroy all Substances transferred to CADUS by SB, SB Targets
         and Third Party Targets and all Screens in its possession or control
         that incorporate such Substances, SB Targets or Third Party Targets
         including sequence and other related information, and will cease all
         use thereof.

         4.   DEVELOPMENT AND COMMERCIALIZATION

              4.1     Research and Development by SB

              (a) SB shall have sole and absolute discretion to determine the
         means and methods by which it will conduct screening, assays and other
         research and development using the Screens, provided that the Screens
         and CADUS Technology will not be made available by SB to Third Parties
         except as provided in Paragraph 5.4(b). For the purposes of clarity,
         the identity, sequence information, and structure of the Natural Ligand
         for any Third Party Target, or other information on the biological
         function of such Third Party Target are not CADUS Technology and may be
         provided by SB to Third Parties.

              (b) Subject to the terms of this Agreement, SB shall have the sole
         and absolute discretion to make all decisions relating to the research,
         development, marketing and other commercialization activities with
         respect to any Compound or Product derived

                                      32


<PAGE>




         by it from its use of the Screens or from CADUS activities under
         Paragraphs 3.9(b) and 5.4(b).

              (c) Neither SB nor any Affiliate thereof shall disassemble or seek
         to reverse engineer the Substances (excluding any Compounds, Products,
         or Natural Ligands or Surrogate Ligands) or Screens provided by CADUS
         to SB.


              (d) Determination by SB Not To Develop a Project Compound

                      (1) In the event that (i) SB makes a good faith
         determination that it is not interested in pursuing or continuing to
         pursue the development of a Project Compound in any way; and (ii) SB in
         its sole discretion seeks to license such Project Compound to a Third
         Party, then SB shall promptly notify CADUS to that effect and such
         Project Compound shall be subject to CADUS's option as provided in
         Paragraph 4.1(e). SB's obligations under this Paragraph to grant CADUS
         the option provided in Paragraph 4.1(e)(1) shall not apply to any
         Project Compound which is active in a screen under active use at SB, or
         where such Project Compound is active in the same screen as any other
         compound in development at SB, or where SB is unable to grant CADUS
         such option due to obligations (including options) to a Third Party
         existing as of the Effective Date.

                      (2) Until the later of (i) the termination of the Research
         Program; or (ii) the fifth anniversary of the Effective Date, Compounds
         which have not reached Project Compound status and for which SB makes a
         good faith determination that it is not interested in pursuing or
         continuing to pursue the development of a Project Compound therefrom in
         any way and for which SB in its sole discretion seeks to license to a
         Third Party are subject to CADUS's option as provided in Paragraph
         4.1(e). SB's obligations under this subparagraph to grant CADUS the
         option provided in Paragraph 4.1(e) shall

                                      33


<PAGE>




         not apply to any Compound if SB is unable to grant CADUS such option
         due to obligations (including options) to a Third Party existing as of
         the Effective Date.

                      (3) SB's obligations under this Paragraph 4.1(d) shall not
         apply to Project Compounds or Compounds as the case may be, which SB
         seeks to license to a Third Party without providing such Third Party
         any CADUS Technology or information derived therefrom in connection
         with such license.

              (e) CADUS Option

                      (1) In the event that SB is required and is able, as
         provided in Paragraph 4.1(d), to grant CADUS an option under this
         Paragraph 4.1(e) with respect to any Project Compound or Compound as
         the case may be and so long as CADUS is not in material breach of this
         Agreement at such time, then SB hereby grants to CADUS an exclusive
         option to acquire an exclusive, worldwide license to the SB Technology,
         SB Patents and any other patents and know-how relating to such Project
         Compound or Compound as the case may be, each as necessary to make,

         have made, use, and sell such Project Compound or Compound (or Product
         incorporating it) as the case may be. Such license shall be
         sublicenseable so long as CADUS is involved in developing and/or
         marketing such Compound. The term of each such option grant shall be
         for a period of thirty (30) days commencing on the date SB provides
         written notice of such option grant to CADUS and sufficient information
         and data related thereto or reasonably requested by CADUS to allow
         CADUS to determine its interest in acquiring an exclusive license
         therefor. CADUS shall be deemed to have effectively exercised any such
         option if CADUS sends written notice of its exercise of such option to
         SB within the applicable thirty (30) day option period, provided that
         the Parties reach a definitive agreement for such license within [c.i.]
         after the date of the notice of such exercise. During such [c.i.]
         period, SB and CADUS shall negotiate in good faith to reach definitive
         agreements for the commercially reasonable exclusive license. During
         the

                                      34


<PAGE>




         thirty (30) day option period and the [c.i.] negotiation period, SB
         shall not seek to negotiate a similar license for such Project Compound
         or Compound as the case may be with any Third Party. In the event that
         SB and CADUS do not enter into such license within such [c.i.] period
         for any reason whatsoever, SB shall be free at any time thereafter to
         negotiate any license with a Third Party with respect to such Project
         Compound or Compound as the case may be.

                      (2) Each such exclusive license pursuant to subparagraph
         (1) shall provide for (i) royalties and milestone payments to be paid
         to SB; (ii) additional royalties to be paid by CADUS to SB in the
         amount of any royalties that SB may owe to any Third Party with respect
         to any product; (iii) additional compensation to be paid by CADUS to
         SB, to compensate SB for its expenditures, based on its fully allocated
         costs, for development of the Project Compound or Compound as the case
         may be through the date of such option exercise; and (iv) such other
         terms as are commercially reasonable. In the event that CADUS fails to
         exercise its option with such thirty (30) day period, the exclusive
         right to such Project Compound or Compound as the case may be shall
         remain with SB.

                      (3) SB shall not be obligated under any circumstances to
         grant CADUS the option provided in Paragraph 4.1(e) for any Project
         Compound which (i) has entered Phase II(b); or (ii) for any Project
         Compound or Compound as the case may be, in the event that SB
         determines not to pursue such Project Compound or Compound as the case
         may be at any time for safety reasons or for want of efficacy.

                      (f) CADUS Co-Promotion


         (i) In the event that SB seeks marketing approval for any Value Added
         Product in the United States, Canada or Mexico, then promptly upon SB's
         receipt of notice of acceptance for filing of the NDA for such Value
         Added Product, with respect to the FDA in the United States, or any
         equivalent receipt of notice of filing from any like

                                      35


<PAGE>




         agency in Canada or Mexico, SB shall provide written notice to CADUS
         specifying the therapeutic indication for which SB is seeking marketing
         approval in each applicable country and whether SB intends to itself
         (or through an Affiliate) sell and distribute such Value Added Product
         in such applicable country. CADUS shall have the option, exerciseable
         in writing within sixty (60) days following its receipt of such written
         notice from SB, to elect to Co-Promote such Value Added Product with SB
         in the United States, Canada and/or Mexico, as applicable, subject to
         the terms and conditions outlined below. For the avoidance of doubt,
         CADUS' option shall only apply to those Value Added Products in
         countries (the United States, Canada or Mexico) in which SB itself (or
         through an Affiliate) sells and distributes such Value Added Product.

         (ii) In the event that CADUS elects to Co-Promote a Value Added Product
         with SB pursuant to (i) above, then the parties shall promptly
         negotiate and execute a definitive Co-Promotion Agreement, but CADUS
         shall have the right to rescind its election at any time if a
         definitive Co-Promotion Agreement is not executed by SB and CADUS
         within ninety (90) days of CADUS's election. The definitive
         Co-Promotion Agreement, at a minimum, shall contain the following
         terms and conditions:

         (A) SB shall be solely responsible for (1) all pricing and
         pricing-related activities, including without limitation applying for
         pricing approval if necessary, (2) performing all distribution and
         related services, (3) all promotion, sales and marketing activities to
         all managed care organizations, including without limitation health
         maintenance organizations and hospitals.

         (B) The term of such Co-Promotion Agreement shall be for the lesser of
         five (5) years or the expiration of the relevant patents in the
         applicable co-promotion country.

                                      36


<PAGE>





         (C) The parties shall Co-Promote a single brand of Value Added Product
         in the Co-Promotion country, using a trademark owned, selected and
         controlled by SB.

         (D) A Marketing Committee shall be formed comprised of two (2) members
         each from SB and CADUS. An SB designated member shall chair the
         Marketing Committee. The decision of the Chairperson shall be final and
         binding. The Marketing Committee shall be responsible for deciding all
         issues with respect to the Co-Promotion of Value Added Product in any
         Co-Promotion territory. Such responsibility shall include, without
         limitation, establishing an annual marketing plan covering all
         activities in support of the Co-Promotion of the Value Added Product;
         developing the strategy, sales forecasts and budgets for the Value
         Added Product; establishing detailing levels and targeted physicians
         and other health care personnel; developing all promotional literature
         and materials; developing journal schedules; establishing promotional
         and detailing efforts for both parties; determining quantities of
         samples; determining journal schedules; overseeing advertising, press
         releases and other public relations; supervising health education for
         the Value Added Product; planning symposia and other educational
         program strategy; planning and conducting the appropriate clinical
         trials to support the marketing of the Value Added Product; planning
         for the sharing of medical information; monitoring, supervising and
         reviewing implementation of marketing plans and budgets, field force
         performance and marketing research.

         (E) CADUS shall provide twenty-percent (20%) of the total Co-Promotion
         effort in support of the Value Added Product in any Co-Promotion
         territory, consistent with each annual marketing plan. CADUS shall
         also fund the portion of the Promotional Expenses in connection with
         the Value Added Product, equal to the percentage of Co-Promotion
         effort that CADUS provides.

         (F) In consideration for its Co-Promotion of the Value Added Product,
         CADUS will receive a percentage of the Operating Profit from the Value
         Added Product equal

                                      37


<PAGE>




         to the percentage of Co-Promotion support that CADUS provides, which
         share shall in no event exceed 20% of Operating Profit.

         (G) All labels, labeling and package inserts for the Value Added
         Products shall be printed in accordance with SB's standard labeling
         format and shall contain sole reference to SB. The names of CADUS and
         SB shall appear on all Value Added Product educational and promotional

         materials in the manner determined by the Marketing Committee.

         (H) CADUS Co-Promotion option and rights shall be non-assignable and
         non-transferable except as provided in Paragraph 14.3.

         (iii) This option granted pursuant to this Paragraph 4.1(f) shall not
         apply to Value Added Products subject to co-promotion obligations
         (including options) to a Third Party existing as of the Effective Date.

     (g) CADUS Notification

              (1) During the term of the Research Program and any extensions
thereof, SB intends to notify CADUS in the event SB in its sole determination SB
seeks to outlicense to a Third Party (without existing rights (including an
option) to the relevant product) in North America a pharmaceutical product in
CADUS's Therapeutic Areas of Interest that is not a monoclonal antibody,
radioactive agent, protein therapeutic, or gene therapy, and that has not been
designated by SB as a candidate for outlicensing to a Third Party as part of a
product exchange. The purpose of such notice shall be to provide CADUS with a
reasonable opportunity to seek such a license from SB. Notwithstanding the
foregoing, if SB inadvertently fails to provide such notice to CADUS, SB shall
not be in breach of this Agreement and shall have no liability to CADUS.

                                      38


<PAGE>




              (2) During the term of the Research Program and any extensions
thereof, SB shall use its reasonable best efforts to notify CADUS in the event
SB in its sole determination seeks to outlicense a Project Compound (or Product
incorporating it) subject to the exemptions in subparagraph 4.1(e)(3) above in
North America in CADUS's Therapeutic Areas of Interest. The purpose of such
notice shall be to provide CADUS with a reasonable opportunity to seek such a
license from SB. Notwithstanding the foregoing, if SB inadvertently fails to
provide such notice to CADUS, SB shall not be in breach of this Agreement and
shall have no liability to CADUS.

5.   GRANT OF LICENSES

     5.1      License Grant for Screens

Subject to the terms and conditions of this Agreement, CADUS hereby grants to SB
an exclusive right and license (including as to CADUS, except as otherwise
consented to in writing by SB and except as specifically provided in Paragraphs
3.9(b) and 5.3), in the Territory, under CADUS Technology and CADUS Patents, to
use and practice the Screens (including, without limitation, the right to grow
sufficient amounts of Screens provided by CADUS to SB) to identify and confirm
potential human therapeutics during the term of the Research Program.
Furthermore, SB shall in any event have the exclusive right and license
conferred under this Paragraph for all Screens for a minimum of twelve (12)

months after SB receives substances and information from CADUS enabling SB to
use such Screen. SB shall also retain such exclusive right and license after the
term of the Research Program if SB has identified and/or confirmed a Compound or
Compounds using such Screen during the Research Program but only so long as SB
actively pursues research and/or development of such Compound or any Analog
thereof. Upon the expiration or termination of its license to use and practice a
Screen, SB shall return to CADUS or destroy any such Screen in its possession or
control.

                                      39
                                       

<PAGE>




     5.2 License Grant for Post Term CADUS Technology/CADUS Patents

Subject to the payment of the fee to CADUS provided for in Paragraph 3.3 (f),
CADUS hereby grants to SB, a non-exclusive, world-wide, right and license,
under Post Term CADUS Technology/CADUS Patents, to use and practice such Post
Term CADUS Technology/CADUS Patents (including, without limitation, the right
to grow sufficient amounts of such Screens provided by CADUS to SB) to
identify and confirm potential human therapeutics after the term of the
Research Program, provided such license shall be exclusive for Screens
incorporating SB Targets or Third Party Targets. Upon the expiration or
termination of its license to use and practice a Screen, SB shall return to
CADUS or destroy any such Screen in its possession or control.

     5.3      License Grant for Certain SB Technology

SB hereby grants to CADUS an exclusive (except for SB) license, in the
Territory, to make, have made, use and sell SB Technology only to the extent
that such SB Technology involves improvements to proprietary CADUS Technology
relating to the transfection and expression of targets into yeast cells or
involves the improvements to proprietary CADUS Technology relating to use of
yeast cells as screens, provided such SB Technology is not specific to a
particular Target and such SB Technology is not SB Technology as defined in
subpart (2) of the definition of SB Technology. Notwithstanding the preceding
sentence, such license shall become non-exclusive after the later of the end of
the term of the Research Program or the date the CADUS Technology to which it is
an improvement ceases to be proprietary to CADUS.

     5.4      Use by CADUS of Screens

     (a) Subject to Paragraphs 5.1, 5.4(b) and 3.9(b), CADUS reserves for itself
the rights to use CADUS Technology and CADUS Patents, and SB grants to CADUS
under SB Patents and SB Technology the rights to the extent necessary, on behalf
of SB, to make, use and practice Screens solely at CADUS's facilities pursuant
to Paragraph 3.9(b). In addition:

                                      40



<PAGE>





              (1) CADUS shall have the right to use Screens, without the prior
written approval of SB, solely for the purpose of identifying Surrogate Ligands
under the Research Program.

              (2) Notwithstanding Paragraphs 5.1 and 3.9(b), CADUS shall have
the right to use Screens for the purpose of determining the specificity of
potential therapeutics that are being developed as a result of their activity
against targets that are not within the Research Program, provided that SB is
not precluded from granting CADUS such rights due to existing obligations to a
Third Party. CADUS acknowledges that SB does not expect to be able to grant
CADUS these rights for any Screen incorporating a Third Party Target.

     (b) In the event that CADUS identifies or confirms a Lead Compound using a
Screen pursuant to Paragraphs 3.9(b) and/or 5.4(a), SB shall have the exclusive
sublicenseable right to make, have made, use, and sell such Lead Compound, or
any Compounds or Products developed therefrom, in the Territory under any CADUS
Technology and CADUS Patents and any other CADUS patents and technology related
thereto and necessary to make, have made, use and sell such Lead Compound,
Compound, or any Products developed therefrom.

     5.5      Rights to Use Technology

     (a) Except for the specific licenses to use and practice Screens set forth
in Sections 5.1 and 5.2 hereof and the license granted in Paragraph 5.4(b)
hereof, CADUS is not granting to SB any other license to use the CADUS
Technology under this Agreement. Accordingly, (1) SB shall not use the CADUS
Technology other than the Screens (as permitted by this Agreement for any
purpose whatsoever) and (2) CADUS is retaining all rights to the CADUS
Technology and CADUS Patents that are not specifically being licensed to SB
pursuant to Sections 5.1, 5.2 and 5.4(b) hereof.

     (b) Except as set forth in Paragraphs 3.9(b), 5.3, and 5.4(a) hereof, SB is
not granting to CADUS any right to use SB Technology and SB Patents under this
Agreement. Accordingly, (1)

                                      41


<PAGE>




CADUS shall not use SB Technology and SB Patents, and (2) SB is retaining all
rights to the SB Technology and SB Patents, both (1) and (2) except as provided
pursuant to Paragraph 3.9(b), 5.3, and 5.4(a).


     5.6      No Right to Sublicense

     (a) SB shall not have any right to sublicense to any Third Party any
license granted by CADUS pursuant to Paragraph 5.1 or 5.2.

     (b) CADUS shall have the right to sublicense to any Third Party or
Affiliate any right granted by SB pursuant to Paragraph 5.3 hereof.

     (c) CADUS shall not have any right to sublicense to any Third Party or any
Affiliate any right granted by SB pursuant to Paragraphs 3.9(b) and 5.4(a)
hereof.

6.   ROYALTIES AND MILESTONE PAYMENTS.

     6.1      Royalties

     (a) During the Royalty Term, SB shall pay the following royalties on Net
Sales in the United States of each Product which is sold by SB or SB licensees,
which royalty shall be calculated on a product by product basis, with the
applicable royalty rate for each such Product in a calendar year being based on
United States (U.S.) Net Sales for such Product in the calendar year and this
determined royalty rate being applied to all United States Net Sales of such
Product in such calendar year:


   
         (1) [c.i.] of U.S. Net Sales of each Product during each calendar year
     in which the U.S. Net Sales of such Product do not exceed [c.i.];
    

   
         (2) [c.i.] of such U.S. Net Sales of each Product during each calendar 
     year in which the U.S. Net Sales of such Product exceed [c.i.] but do not
     exceed [c.i.]; and
    

   
         (3) [c.i.] of such U.S. Net Sales of each Product during each calendar
     year in which the U.S. Net Sales of such Product exceed [c.i.].
    


                                      42
<PAGE>

     (b) During the Royalty Term, SB shall pay a royalty of [c.i.] of Net Sales
outside of the United States of each Product which is sold by SB or SB
licensees.

     (c) During the Royalty Term, for Value Added Products, SB shall pay to
CADUS an additional royalty to that otherwise due under Paragraph 6.1 (a) and
(b) as follows:

   

         (1) For Value Added Target Products, [c.i.] of Net Sales
    

   
         (2) For Value Added Peptide Products, [c.i.] of Net Sales  
    

   
         (3) For Value Added CADUS Products, [c.i.] of Net Sales.
    

   
     (d) The royalties under this Paragraph 6.1 shall be calculated by adding
together the royalty in Paragraph 6.1 (a) or (b) together with the applicable
royalty for Value Added Product in Paragraph 6.1(c) (1) and/or (2) and/or (3).
    

     6.2      Limitation on Royalties

     (a) SB's royalty payment to CADUS pursuant to this Section 6 shall not
exceed [c.i.] of Net Sales nor shall it exceed [c.i.] of Net Sales for a Product
based on a Compound or a Natural Ligand identified or confirmed by a Screen
which incorporates a Third Party Target.

     (b) SB shall have no obligation to pay CADUS royalties on Net Sales of a
Product by CADUS in the event CADUS is an SB licensee for such Product.

     6.3      Effect of Co-Promotion Agreement

     The royalties set forth in Paragraph 6.1(c) shall not apply to Net Sales of
Value Added Product in the countries and for the Value Added Products with
respect to which CADUS has exercised its right to co-promote pursuant to
Paragraph 4.1(f), but only after a definitive Co-Promotion Agreement has been
executed by SB and CADUS with respect thereto and during the term of such
Co-Promotion Agreement.

                                      43


<PAGE>




     6.4      Expiration of Royalty Obligations

Upon expiration of SB's obligation to pay royalties with respect to a Product
pursuant to Paragraph 6.1, SB shall have the royalty-free, perpetual right to
continue to make, have made, use and sell such Product in the Territory.

     6.5      Third Party Royalties

SB, at its sole expense, shall pay all royalties owing to any Third Party in
order to exercise its rights hereunder to make, have made, use, sell or have

sold any Product. However, SB shall be entitled to a credit against royalties
payable to CADUS for a Product in an amount equal to fifty (50%) percent of any
royalties paid by SB to a Third Party for such Product pursuant to obligations
required to be incurred by SB during the term of the Research Program in order
to use CADUS Technology in the conduct of the Research Program, but in no event
shall such credit (i) in the aggregate exceed fifty percent (50%) of the
royalties due CADUS in the aggregate; and (ii) in any calendar quarter exceed
fifty (50%) of the royalties due in such quarter for such Product. SB shall not
be entitled to such credit in any country of the Territory in the event SB
incurs such obligations to a Third Party where (1) CADUS has not consented to
such obligation; and (2) the patent(s) of such Third Party for which such
obligations have been incurred are held invalid or unenforceable.

     6.6      Clinical Milestone Payments

SB shall pay to CADUS the following clinical milestone payments within thirty
(30) days of the first occurrence of each event below with respect to each
Product:

     [c.i.]

     6.7      Credit Against Royalties

SB shall be entitled to a credit against royalties payable with respect to a
Product in an amount equal to fifty (50%) percent of the clinical milestone
payments made under Paragraph 6.6(d)

                                      44


<PAGE>




with respect to such Product, but in no event shall such credit in any calendar
quarter exceed fifty (50%) percent of the royalties due in such quarter.

     6.8      Single Clinical Milestone Payments

The obligation to pay for each clinical milestone under Paragraph 6.6 is imposed
only once per Product and shall not be made in the case of improvements or
modifications such as, but not limited to, changed forms, formats, salts,
formulations, indications, processes or protocols of a Product for which a
clinical milestone payment was previously made.

     6.9      Obligation to Pay Royalties

The obligation to pay royalties under this Section 6 is imposed only once with
respect to the same unit of Product regardless of the number of patents
pertaining thereto. There shall be no obligation to pay royalties under this
Section 6 on sales of Products among a Party, its Affiliates, its licensees
and/or sublicensees but in such instances the obligation to pay royalties shall
arise upon the sale by a Party, its Affiliates, its licensees or sublicensees to

Third Parties.

     6.10     Takeda, Synthelabo and Merck KGaA

Notwithstanding anything else to the contrary, SB shall have no obligation to
CADUS to pay royalties on Net Sales of Products:

     (a) by Takeda for Products which are subject to Takeda's rights to
co-promote and/or co-market pursuant to the Restated SB-Takeda Collaboration and
License Agreement dated June 28, 1996; and

     (b) by Takeda, Synthelabo and/or Merck KGaA for Products which include a
Natural Ligand (or an Analog of such Natural Ligand developed by Takeda,
Sythelabo and/or Merck KGaA) pursuant to the SB-Takeda Collaboration and License
Agreement dated June 28, 1996, Synthelabo/SB/HGS Collaboration and License
Agreement dated June 30, 1996 or the Merck/SB/HGS Collaboration and License
Agreement dated July 10, 1996 as the case may be.

                                      45


<PAGE>




7.   PAYMENTS AND REPORTS

     7.1      Payment

All payments required under this Agreement shall be payable in U.S. dollars. If
SB fails to make a payment in full to CADUS on the date any payment hereunder is
due, for any reason whatsoever other than if governmental regulations prevent
remittances from a foreign country with respect to sales made in that country,
the obligation to pay royalties on sales in that country shall be suspended
until such remittances are possible. Each party shall have the right, upon
giving written notice to the other, to receive payment in that country in local
currency.

     7.2      Payment of Royalties

All royalty payments due hereunder shall be paid quarterly within sixty (60)
days of the end of each calendar quarter. Each such payment shall be accompanied
by a statement, Product-byProduct and country-by-country, of the amount of Net
Sales during such quarter and the amount of royalties due on such Net Sales.
Monetary conversions from the currency of a foreign country, in which a Product
is sold, into United States currency shall be made at the official exchange rate
in force in that country for financial transactions on the last business day of
the calendar quarter or half year for which the royalties are being paid. If
there is no such official exchange rate, the conversion shall be made at the
conversion rate for such remittances on that date as certified by Citibank,
N.A., New York, New York, U.S.A.

     7.3      Records Retention


SB, its Affiliates, its licensees and its sublicensees shall keep complete and
accurate records (specifically including originals or copies of documents
supporting entries in the books of account) pertaining to the sale of Products
in the Territory and covering all transactions from which Net Sales are derived
for a period of three (3) calendar years after the year in which such sales
occurred, and in sufficient detail to permit CADUS to confirm the accuracy of
royalty calculations hereunder.

                                      46


<PAGE>




     7.4      Audit Request

At the request and expense of CADUS, SB, its Affiliates, its licensees and its
sublicensees shall permit an independent, certified public accountant appointed
by CADUS, at reasonable times (not to exceed once per calendar year) and upon
reasonable notice, to examine those records and all other material documents
relating to or relevant to the computation of Net Sales in the possession or
control of SB, its Affiliates, its licensees or its sublicensees, for a period
of two (2) years after such royalties have accrued, as may be necessary to: (i)
determine the correctness of any report or payment made under this Agreement; or
(ii) obtain information as to the royalties payable for any calendar quarter in
the case of SB's failure to report or pay pursuant to this Agreement. Results of
any such examination shall be made available to both Parties. CADUS shall bear
the full cost of the performance of any such audit except as hereinafter set
forth. If, as a result of any inspection of the books and records of SB, its
Affiliates, its licensees or its sublicensees, it is shown that SB's royalty
payments under this Agreement were less than the amount which should have been
paid, then SB shall make all payments required to be made to eliminate any
discrepancy revealed by said inspection within thirty (30) days after CADUS's
demand therefor.

     7.5      Taxes

In the event that SB is required to withhold and remit any tax to the revenue
authorities in any country in the Territory regarding any milestone payment or
royalties payable to CADUS due to the laws of such country, such amount shall be
deducted by SB, and it shall notify CADUS and promptly furnish CADUS with copies
of any tax certificate or other documentation evidencing such withholding.

     7.6      Notice of Milestones

SB shall provide CADUS with written notice of each of the milestone events
listed in Paragraphs 3.3(g) and 6.6 within 30 days of its occurrence:

                                      47



<PAGE>




8.   INFRINGEMENT ACTIONS BY THIRD PARTIES; PATENT ENFORCEMENT

     8.1

In the event of the institution of any suit by a Third Party against CADUS, SB
or its licensees for patent infringement involving the manufacture, use, sale,
distribution or marketing of Product (including the use of Screens and Targets),
the party sued shall promptly notify the other party in writing. The other party
shall have the right, to the extent of its interest, but not the obligation to
defend or participate in the defense of such suit at its own expense. CADUS and
SB shall assist one another and cooperate in any such litigation at the other's
request without expense to the requesting party.

     8.2

     (a) In the event that CADUS or SB becomes aware of actual or threatened
infringement of a SB Patent or CADUS Patent anywhere in the Territory, that
party shall promptly notify the other party in writing. The owner of the SB
Patent or CADUS Patent shall have the first right but not the obligation to
bring, at its own expense, an infringement action against any Third Party and to
use the other party's name in connection therewith. CADUS and SB shall assist
one another and cooperate in any such litigation at the other's request without
expense to the requesting party.

     (b) If CADUS does not commence a material infringement action with respect
to a CADUS Patent covering a Product for which CADUS is aware of actual
infringement within ninety (90) days, SB, after notifying CADUS in writing,
shall be entitled to bring such infringement action at its own expense to the
extent that SB is licensed thereunder and in its own name and/or in the name of
CADUS. The foregoing notwithstanding, in the event that an alleged infringer
certifies pursuant to 21 USC 355(b)(2)(A)(vii)(IV) or (j)(2)(A)(iv) against an
issued CADUS Patent covering a Product, the party receiving notice of such
certification shall immediately notify the other party of such certification,
and if fourteen (14) days prior to expiration of the forty-five (45) day period
set forth in 21 USC 355(c)(3)(C) or (j)(4)(B)(iii), the owner of the CADUS
Patent fails to commence an

                                      48


<PAGE>




infringement action, the party receiving notice, in its sole discretion, at its
own expense and to the extent that it is licensed under the CADUS Patent, shall
be entitled to bring such infringement action in its own name and/or in the name
of the owning party and shall have full control over its conduct, including

settlement thereof provided such settlement shall not be made without the prior
written consent of CADUS if it would adversely affect the patent rights of
CADUS. In any event, CADUS shall assist SB and cooperate in any such litigation
at SB's request without expense to SB.

     8.3

CADUS and SB shall recover their respective actual out-of-pocket expenses, or
equitable proportions thereof, associated with any litigation or settlement
thereof from any recovery made by any party. Fifty percent (50%) of any excess
amount shall be paid to the owner of the infringed patent and the remaining
fifty (50%) shall be shared between SB and CADUS in an amount proportional to
their respective expenses.

     8.4

The parties shall keep one another informed of the status of and of their
respective activities regarding any such litigation or settlement thereof.

     8.5

The owner of a SB Patent or CADUS Patent shall have the first right to seek
extensions of the terms of the patent and to seek to obtain SPCs, provided that
if SB is developing, selling or planning to sell a product covered by a CADUS
patent, SB shall have the second right. Each party shall assist the other in the
obtaining of such extensions or SPCs including by authorizing the other party to
act as its agent.

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<PAGE>




9.   OWNERSHIP OF INVENTIONS; PATENTS

     9.1      Ownership of Inventions

     (a) The entire right and title in all CADUS Technology and CADUS Patents,
shall be owned solely by CADUS. The cost for patent applications and patent
maintenance for such CADUS Patents shall be borne by CADUS.

     (b) The entire right and title in all SB Technology and SB Patents, shall
be owned solely by SB. The cost for patent applications and patent maintenance
for such SB Patents shall be borne by SB.

     9.2      Joint Inventions

     (a) The Parties recognize that, as a result of the collaboration between SB
and CADUS during the conduct of the Research Program hereunder, certain
Inventions may be deemed to be Joint Inventions. In that event, the Parties
shall jointly own Patents and inventor's certificates covering such Joint

Invention, provided the cost for patent applications and patent maintenance for
such Joint Inventions shall be borne by the Parties on an equal basis (unless a
party wishes to abandon its rights therein). Notwithstanding the foregoing, the
Parties acknowledge that joint inventions which are SB Technology as defined in
subparagraph (2) of such definition are governed by Paragraph 9.1 (b) and not by
Paragraph 9.1(a) and are not Joint Inventions.

     (b) The parties shall provide each other with copies of patent applications
filed for Joint Inventions under Paragraph 9.2(a).

     (c) The parties agree that Joint Inventions with respect to anything that
is not a human therapeutic and arising from (1) the use of an SB Target shall be
deemed SB Technology and owned by SB; (2) the use of a CADUS Target shall be
deemed to be CADUS Technology and owned by CADUS; and (3) the use of an Other
Target shall be deemed to be both CADUS Technology and SB Technology and owned
jointly by CADUS and SB.

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10.  INDEMNIFICATION

     10.1     Indemnification

Each Party shall indemnify, defend and hold the other Party, its Affiliates, its
licensees and its sublicensees, and their respective directors, officers,
employees and agents, harmless from and against any and all liabilities,
damages, losses, penalties, costs and expenses (including the fees of attorneys
and other professionals) arising out of or resulting from:

     (a) negligence, recklessness or intentional acts or omissions of the
indemnifying Party, its Affiliates or sublicensees, and their respective
directors, officers, employees and agents, in connection with the work performed
by such party under the Research Program; and

     (b) any warranty claims, Product recalls or any claims of personal injury
or property damage relating to the manufacture, use, distribution or sale of any
Product developed or marketed by it.

     10.2     Notice

In the event that either Party is seeking indemnification under Paragraph 10.1,
such Party shall inform the indemnifying Party of a claim as soon as reasonably
practicable after it receives notice of the claim, shall permit the indemnifying
Party to assume direction and control of the defense of the claim (including the
right to settle it at the sole discretion of the indemnifying Party), and shall
cooperate as requested (at the expense of the indemnifying Party) in the defense
of the claim.


11.  PUBLICATION; CONFIDENTIALITY

     11.1     Notification

Both Parties recognize that each may wish to publish the results of their work
relating to the Research Program. However, both parties also recognize the
importance of acquiring patent

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<PAGE>




protection on inventions and that publication restrictions do exist on SB
Technology or CADUS Technology received from a Third Party. Consequently, any
proposed publication including the other's technology by either Party shall
comply with this Section 11. At least thirty (30) days before a manuscript is to
be submitted to a publisher, the publishing Party will provide the other Party
with a copy of the manuscript. If the publishing Party wishes to make an oral
presentation, it will provide the other Party with a copy of the abstract (if
one is submitted) at least thirty (30) days before it is to be submitted. The
publishing Party will also provide to the other Party a copy of the text of the
presentation, including all slides, posters, and any other visual aids, at least
thirty (30) days before the presentation is made. For the purposes of clarity,
CADUS may not publish anything that is included in subparagraph (2) of the
definition of SB Technology.

     11.2     Review of Proposed Publications

The receiving Party will review the manuscript, abstract, text or any other
material provided under Section 11.1 to determine if patentable subject matter
is disclosed. The reviewing Party will notify the publishing Party within
fifteen (15) working days of receipt of the proposed publication if the
reviewing Party, in good faith, determines that patentable subject matter is or
may be disclosed, or if the reviewing Party, in good faith, believes
confidential or proprietary information is or may be disclosed. If it is
determined by the reviewing Party that patent applications should be filed, the
publishing Party shall delay its submission for publication or presentation for
a period not to exceed thirty (30) days from the reviewing Party's receipt of
the proposed publication to allow time for the filing of patent applications
covering patentable subject matter. In the event that the delay needed to
complete the filing of any necessary patent application will exceed the thirty
(30) day period, the Parties will discuss the need for obtaining an extension of
the publication delay beyond the thirty (30)-day period. If it is determined in
good faith by the reviewing Party that confidential or proprietary information
of it is being disclosed, the Parties will consult in good faith to arrive at an
agreement on mutually acceptable modifications to the proposed publication to
avoid such disclosure. The publishing Party of any manuscript, text or oral
presentation will acknowledge the other Party for its

                                      52



<PAGE>




contribution to the material being published or presented and to the Research
Program. Each party shall be named as a co-author on such publications
disclosing the information of the other Party.

     11.3     Confidentiality; Exceptions

Except to the extent expressly authorized by this Agreement or otherwise agreed
in writing, the Parties agree that, for the term of the Research Program and for
five (5) years thereafter the receiving Party, its Affiliates, its licensees and
its sublicensees shall keep, and shall ensure that its officers, directors,
employees and consultants keep, completely confidential and shall not publish or
otherwise disclose and shall not use for any purpose any information furnished
to it by the other Party, its Affiliates, its licensees or its sublicensees or
developed under any Research Program pursuant to this Agreement, except to the
extent that it can be established by the receiving Party by competent proof that
such information: (i) is or hereafter becomes generally available to the public
other than by reason of any default with respect to a confidentiality
obligation; (ii) was already known to the recipient as evidenced by prior
written documents in its possession; or (iii) is disclosed to the recipient by a
Third Party who is not in default of any confidentiality obligation to the
disclosing Party ("Confidential Information"). Notwithstanding the above, (1) SB
may disclose SB Technology (other than SB Technology subject to Paragraph 5.3 as
long as CADUS is the exclusive licensee thereof) to Third Parties; and (2) CADUS
may disclose SB Technology licensed to it under Paragraph 5.3 and Compounds
licensed to it pursuant to Paragraph 4.1(e).

     11.4     Exceptions

The restrictions contained in Paragraph 11.3 shall not apply to Confidential
Information that (i) is submitted by the recipient to governmental authorities
to facilitate the issuance of marketing approvals for a Product, provided that
reasonable measures shall be taken to assure confidential treatment of such
information; (ii) is provided by the recipient to Third Parties under
appropriate terms and conditions, including confidentiality provisions
equivalent to those in this Agreement, for consulting, development,
manufacturing, external testing and

                                      53


<PAGE>




marketing trials; or (iii) is otherwise required to be disclosed in compliance
with applicable laws or regulations or order by a court or other regulatory body

having competent jurisdiction; provided that if a Party is required to make any
such disclosure of the other Party's Confidential Information it will, except
where impracticable for necessary disclosures, for example to physicians
conducting studies or to health authorities, give reasonable advance notice to
the other Party of such disclosure requirement and, except to the extent
inappropriate in the case of patent applications, will use its best efforts to
secure confidential treatment of such Confidential Information required to be
disclosed.

     11.5     Confidentiality Obligation of CADUS

Subject to Paragraphs 11.1 and 11.2, CADUS agrees that, for the term of the
Research Program it shall keep completely confidential and shall not publish or
otherwise disclose confidential information pertaining to CADUS Technology,
except to the extent that CADUS can establish by competent proof that such
information:

     (a) was or became generally available to the public or otherwise part of
the public domain other than through any act or omission of CADUS in breach of
this Agreement;

     (b) was disclosed under requirement of law or by order or regulation of a
governmental agency or a court of competent jurisdiction, including without
limitation any requirement to disclose such information to any governmental
agency for purposes of obtaining approval to market the Products;

     (c) is only information for which CADUS has sought patent or equivalent
protection, including the filing of a patent application; or

     (d) was disclosed to any Third Party under an obligation of
confidentiality, including consultants of CADUS, other licensees or potential
licensees of CADUS or potential investors in or business partners of CADUS.

                                      54


<PAGE>




     11.6     Limitations on Use

Each Party shall use, and cause each of its Affiliates, its licensees and its
sublicensees to use, any Confidential Information obtained by it from the other
Party, its Affiliates, its licensees or its sublicensees, pursuant to this
Agreement or otherwise, solely in connection with the covered activities or the
transactions contemplated hereby.

     11.7     Remedies

Each Party shall be entitled, in addition to any other right or remedy it may
have, at law or in equity, to an injunction, without the posting of any bond or
other security, enjoining or restraining the other Party, its Affiliates, its

licensees and/or its sublicensees from any violation or threatened violation of
this Section 11.

     11.8     Survival

The provisions of this Section 11 shall be in addition to, and not in limitation
of, the provisions of separate Confidentiality Agreements between CADUS and
SmithKline Beecham Corporation, dated July 16, 1993 and September 14, 1995 (the
Confidentiality Agreements), which shall survive in full force and effect except
to the extent they are fundamentally inconsistent with this Agreement, in which
case, the terms of this Agreement shall control. SmithKline Beecham p.l.c.
hereby agrees to bound by the terms and conditions of the Confidentiality
Agreements.

12.  TERM; TERMINATION OF LICENSES

     12.1     Term

This Agreement shall become effective as of the Effective Date and shall remain
in full force and effect unless earlier terminated as provided in this Section
12.

     12.2     Termination of Licenses

     (a) Failure by either Party or its Affiliates to comply with any of the
material obligations contained in this Agreement shall entitle the other Party
to give to the defaulting

                                      55


<PAGE>




Party notice specifying the nature of the default and requiring it to cure such
default. If such default is not cured within sixty (60) days after the receipt
of such notice (or, if such default cannot be cured within such sixty (60)-day
period, if the Party in default does not commence and diligently continue
actions to cure such default), the notifying Party shall be entitled, without
prejudice to any of its other rights conferred on it by this Agreement, in
addition to any other remedies available to it by law or in equity, to terminate
the licenses it granted to the defaulting Party and its Affiliates pursuant to
Section 5 (other than the license granted to SB under Paragraph 5.4(b) hereof)
of this Agreement by giving written notice to take effect immediately upon
delivery of such notice. The right of either Party to terminate such licenses,
as hereinabove provided, shall not be affected in any way by its waiver or
failure to take action with respect to any previous default. Neither the failure
by CADUS to achieve the Key Check Point nor the failure to agree on an Annual
Research Plan pursuant to Paragraph 3.1 shall give SB the right to exercise its
termination rights under this Paragraph 12.2(a). The failure by SB to meet the
requirements of Paragraphs 3.5(a) or 4.1(g) shall not give CADUS the right to
exercise its termination rights under this Paragraph 12.2(a).


     (b) Termination by CADUS, pursuant to this Paragraph 12.2, of the licenses
it granted to SB under Section 5 (other than the licenses granted to SB under
Paragraph 5.4(b) hereof) of this Agreement shall also terminate the rights and
obligations of the Parties set forth in Section 3 (other than Paragraphs 3.3(f)
and (g), 3.8(b), and 3.12(c) thereof) of this Agreement but shall not terminate
any other rights and obligations of the Parties under this Agreement. Within ten
(10) working days after such termination, SB shall pay to CADUS the amount of
funding it would have provided to CADUS pursuant to Paragraphs 3.3(a), (b), and
(d) hereof through the end of the term of the Research Program. Upon such
termination, (i) CADUS shall have no further obligation to conduct the Research
Program, (ii) SB shall deliver to CADUS all data, reports and records in SB's
possession or control which relate to the Research Program and (iii) SB shall
return to CADUS or destroy all Screens and Substances developed under the
Research Program in its possession or control.

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<PAGE>




     (c) Termination by SB, pursuant to this Section 12.2, of the licenses it
granted to CADUS under Section 5 of this Agreement shall also terminate the
rights and obligations of the Parties set forth in Section 3 (other than
Paragraphs 3.3(f) and (g), 3.8(b), and 3.12(c) thereof) of this Agreement but
shall not terminate any other rights and obligations of the parties under this
Agreement. Upon such termination, (i) CADUS shall have no further obligations to
conduct the Research Program, (ii) SB shall have no further obligation to fund
the Research Program under Paragraphs 3.3(b) and (d), and (iii) CADUS shall
return to SB or destroy all SB Targets and Third Party Targets and all Screens
in its possession or control that incorporate SB Targets and/or Third Party
Targets.

     12.3

Either party may terminate the licenses granted under this Agreement if, at any
time, the other party shall file in any court or agency pursuant to any statute
or regulation of any state or country, a petition in bankruptcy or insolvency or
for reorganization or for an arrangement or for the appointment of a receiver or
trustee of the party or of its assets, or if the other party proposes a written
agreement of composition or extension of its debts, or if the other party shall
be served with an involuntary petition against it, filed in any insolvency
proceeding, and such petition shall not be dismissed within sixty (60) days
after the filing thereof, or if the other party shall propose or be a party to
any dissolution or liquidation, or if the other party shall make an assignment
for the benefit of creditors.

     12.4

Notwithstanding the bankruptcy of CADUS or SB, or the impairment of performance
by CADUS or SB of its obligations under this Agreement as a result of bankruptcy

or insolvency of CADUS or SB, the other party shall be entitled to retain the
licenses granted herein, and SB licensees shall be entitled to retain their
rights as provided in this Agreement, subject to rights of a party to terminate
such licenses for reasons other than bankruptcy or insolvency as expressly
provided in this Agreement.

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     12.5

Neither party shall have the right to terminate the licenses under this
Agreement except pursuant to Paragraphs 12.2(a), 12.2(b), 12.2(c), and 12.3,
provided however that nothing in this Agreement shall limit any remedies for
breach which may be available pursuant to a judgment of a court, in law or
equity, including termination of this Agreement or of any or all rights
hereunder.

13.  FORCE MAJEURE AND HARDSHIP

     13.1     Events of Force Majeure

Neither Party shall be held liable or responsible to the other Party nor be
deemed to be in default under or in breach of any provision of this Agreement
for failure or delay in fulfilling or performing any obligation of this
Agreement (other than its payment and reporting obligations set forth in Section
6 hereof) when such failure or delay is due to force majeure, and without the
fault or negligence of the Party so failing or delaying. For purposes of this
Agreement, force majeure is defined as causes beyond the control of the Party,
including, without limitation, acts of God; acts, regulations, or laws of any
government; war; civil commotion; destruction of production facilities or
materials by fire, flood, earthquake, explosion or storm; labor disturbances;
epidemic; and failure of public utilities or common carriers. In such event SB
or CADUS, as the case may be, shall immediately notify the other Party of such
inability and of the period for which such inability is expected to continue.
The Party giving such notice shall thereupon be excused from such of its
obligations under this Agreement as it is thereby disabled from performing
(other than its payment and reporting obligations set forth in Section 6 hereof)
for so long as it is so disabled (but not beyond the period of twelve (12)
months following its giving of such notice) and the thirty (30) days thereafter.

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14.  MISCELLANEOUS

     14.1     Relationship of Parties

Nothing in this Agreement is intended or shall be deemed to constitute a
partnership, agency, employer-employee or joint venture relationship between the
Parties. No Party shall incur any debts or make any commitments for the other,
except to the extent, if at all, specifically provided herein.

     14.2     Covenant Not to Solicit Employees

Neither Party shall at any time during the term of the Research Program and for
a period of two (2) years thereafter, directly or indirectly, in any manner or
under any circumstances or conditions whatsoever solicit, induce or attempt to
induce any management employee or scientist of the other Party or of any
Affiliate of the other Party to terminate his or her employment with such Party
or such Affiliate.

     14.3     Assignment

Neither Party shall be entitled to assign its rights or transfer its obligations
hereunder without the express written consent of the other Party hereto, except
that both SB and CADUS may otherwise assign their respective rights and transfer
their respective obligations hereunder to any assignee of all or substantially
all of their respective businesses or in the event of their respective merger or
consolidation or similar transaction, provided that the right conferred by
Paragraph 4.1(f) shall not be assigned by CADUS if the assignee of all or
substantially all of CADUS's business is a pharmaceutical company (having
world-wide pharmaceutical sales in excess of the equivalent of One Billion US
Dollars) or in the event CADUS merges, consolidates or enters into a similar
transaction with a pharmaceutical company (having world-wide pharmaceutical
sales in excess of the equivalent of One Billion US Dollars) in which event such
right shall immediately terminate. No assignment and transfer shall be valid and
effective unless and until the assignee/transferee shall agree in writing to be
bound by the provisions of this Agreement. Notwithstanding the preceding,
SmithKline Beecham Corporation and SmithKline Beecham p.l.c. may assign and/or
delegate any rights and/or obligations

                                      59


<PAGE>




hereunder to an Affiliate of either of them without the consent of CADUS;
provided however that such assignment shall not relieve SmithKline Beecham
Corporation and SmithKline Beecham p.l.c. of any of their obligations hereunder.

     14.4     Further Actions

Each Party agrees to execute, acknowledge and deliver such further instruments,
and to do all such other acts, as may be necessary or appropriate in order to

carry out the purposes and intent of this Agreement.

     14.5     Notice

Any notice or request required or permitted to be given under or in connection
with this Agreement shall be deemed to have been sufficiently given if in
writing and personally delivered or sent by registered or certified mail (return
receipt requested), facsimile transmission (receipt verified), express courier
service (signature required), or telegram, prepaid, to the Party for which such
notice is intended, at the address set forth for such Party below:

         (a)          In the case of SB, to:
                      Dr. Peter N Goodfellow
                      Sr. Vice President
                      Biopharmaceuticals R&D
                      New Frontiers Science Park (North)
                      Third Avenue
                      Harlow
                      Essex
                      CM19 5AD

                      Facsimile No.:        011441279627213
                                       
                                      60


<PAGE>




              With a copy to:

                      Dr. John Keller
                      Director
                      Alliance and  Technologies Group
                      709 Swedeland Road
                      King of Prussia, PA 19406

                      Facsimile No.: 610-270-5964

     (b)      In the case of CADUS, to:

                      CADUS Pharmaceutical Corporation
                      777 Old Saw Mill River Road
                      Tarrytown, New York 10591-6705
                      Attention:  President

                      Facsimile No.:  (914) 345-3565

              With a copy to:

                      Morrison Cohen Singer & Weinstein, LLP
                      750 Lexington Avenue

                      New York, New York 10022
                      Attention:  Salomon R. Sassoon, Esq.

                      Facsimile No.: (212) 735-8708

or to such other address for such Party as it shall have specified by like
notice to the other Party, provided that notices of a change of address shall be
effective only upon receipt thereof. If sent by mail, facsimile transmission,
express courier service, or telegram, the date of mailing or transmission shall
be deemed to be the date on which such notice or request has been given.

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     14.6     Use of Name

Except as otherwise provided herein, neither Party shall have any right, express
or implied, to use in any manner the name or other designation of the other
Party or any other trade name or trademark of the other Party for any purpose in
connection with the performance of this Agreement.

     14.7     Public Announcements

Except as required by law, neither Party shall make any public announcement
concerning this Agreement or the subject matter hereof without the prior written
consent of the other, which shall not be unreasonably withheld. In the event of
a required public announcement, the Party making such announcement shall provide
the other Party with a copy of the proposed text prior to such announcement.
Notwithstanding the foregoing, either Party may publicly disclose previously
disclosed non-confidential information without the consent of the other.

     14.8     Waiver

A waiver by either Party of any of the terms and conditions of this Agreement in
any instance shall not be deemed or construed to be a waiver of such term or
condition for the future, or of any subsequent breach hereof. All rights,
remedies, undertakings, obligations and agreements contained in this Agreement
shall be cumulative and none of them shall be in limitation of any other remedy,
right, undertaking, obligation or agreement of either Party.

     14.9     Compliance with Law

Nothing in this Agreement shall be deemed to permit a Party to export, reexport
or otherwise transfer any Product sold under this Agreement without compliance
with applicable laws.

     14.10    Severability

When possible, each provision of this Agreement will be interpreted in such

manner as to be effective and valid under applicable law, but if any provision
of this Agreement is held to be prohibited by or invalid under applicable law,
such provision will be ineffective only to the

                                      62


<PAGE>




extent of such prohibition or invalidity, without invalidating the remainder of
this Agreement, and the Parties shall negotiate in good faith to modify this
Agreement to preserve (to the extent possible) their original intent.

     14.11    Amendment

No amendment, modification or supplement of any provisions of this Agreement
shall be valid or effective unless made in writing and signed by a duly
authorized officer of each Party.

     14.12    Governing Law

This Agreement shall be governed by and construed in accordance with the laws of
New York, without regard to its choice of law principles.

     14.13    Arbitration

The Parties agree that they shall use their best efforts to settle amicably any
disputes, differences or controversies arising between them out of or in
connection with this Agreement. However, the Parties irrevocably agree that any
dispute arising out of or in connection with this Agreement, including but not
limited to any question regarding its existence, validity or termination, if not
so settled within thirty (30) days after occurrence thereof, shall be finally
determined by arbitration. Unless the Parties otherwise agree, arbitration shall
be held in New York if the request is made by SB and in Pennsylvania if the
request is made by CADUS. The arbitration shall be conducted by three
arbitrators who are appointed and who shall conduct such arbitration in
accordance with the commercial rules of the American Arbitration Association
then obtaining. The award rendered by the arbitrators shall be final and binding
upon the Parties. Judgment upon the award rendered may be entered in any court
having jurisdiction or application may be made to such court for a judicial
acceptance of the award and an order of enforcement, as the case may be.

     14.14    Entire Agreement

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<PAGE>






So far as permitted by law and except in the case of fraud or misrepresentation,
this Agreement, the Stock Purchase Agreement and the Confidentiality Agreements
set forth the entire agreement and understanding between the Parties as to the
subject matter hereof and merges all prior discussions and negotiations between
them, and neither of the Parties shall be bound by any conditions, definitions,
warranties, understandings or representations with respect to such subject
matter other than as expressly provided herein or as duly set forth on or
subsequent to the date hereof in writing and signed by a proper and duly
authorized officer or representative of the Party to be bound thereby. In the
event of any conflict between this Agreement and the Stock Purchase Agreement on
the price of shares, the Stock Purchase Agreement controls.

     14.15    Counterparts

This Agreement may be executed simultaneously in any number of counterparts, any
one of which need not contain the signature of more than one Party but all such
counterparts taken together shall constitute one and the same agreement.

     14.16    Descriptive Headings

The descriptive headings of this Agreement are for convenience only and shall be
of no force or effect in construing or interpreting any of the provisions of
this Agreement.

     14.17    Further Collaboration

After the Effective Date, the parties intend to discuss developments of
technology related to CADUS Technology and other enhancements of the Research
Program. However, the parties are under no obligation to enter into any
agreements regarding such developments and enhancements.

                                      64

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     IN WITNESS WHEREOF, each of the Parties has caused this Agreement to be
executed by its duly authorized officer as of the day and year first above
written.




                              SMITHKLINE BEECHAM CORPORATION

                              By:   /s/ Jean-Pierre Garnier
                                    ------------------------------
                              Name:    Jean-Pierre Garnier
                                    ------------------------------
                              Title: Chief Operating Officer
                                    ------------------------------


                              SMITHKLINE BEECHAM p.l.c.

                              By:   /s/ Jean-Pierre Garnier
                                    ------------------------------
                              Name:    Jean-Pierre Garnier
                                    ------------------------------
                              Title: Chief Operating Officer
                                    ------------------------------


                              CADUS PHARMACEUTICAL CORPORATION

                              By:   /s/ Jeremy M. Levin
                                    ------------------------------
                              Name:  Jeremy M. Levin
                                    ------------------------------
                              Title:  Chief Executive Officer
                                    ------------------------------



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