ABBOTT LABORATORIES
SC 13D, 2000-01-05
PHARMACEUTICAL PREPARATIONS
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<PAGE>

                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                              --------------------

                                  SCHEDULE 13D
                                 (Rule 13d-101)

           INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO
                                  RULE 13d-1(a)
             AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a)
                               (Amendment No. ___)


                                 SuperGen, Inc.
- --------------------------------------------------------------------------------
                                (Name of Issuer)

                     Common Stock, par value $0.001 per share
- --------------------------------------------------------------------------------
                          (Title of Class of Securities)

                                  637184 10 - 8
- --------------------------------------------------------------------------------
                                 (CUSIP Number)

                                 Jose M. de Lasa
                          Senior Vice President, Secretary
                               and General Counsel
                               Abbott Laboratories
                               100 Abbott Park Road
                          Abbott Park, Illinois 60064-3500
                                  (847) 937-6100
- --------------------------------------------------------------------------------
                 (Name, Address and Telephone Number of Persons
                 Authorized to Receive Notices and Communications)


                                  December 21, 1999
- --------------------------------------------------------------------------------
               (Date of Event Which Requires Filing of this Statement)

     If the filing person has previously filed a statement on Schedule 13G to
report the acquisition which is the subject of this Schedule 13D, and is
filing this schedule because of Rule 13d-1(e), 13d-1(f) or 13d-1(g), check
the following box / /


                                  Page 1 of 12
<PAGE>

CUSIP NO.:637184 10 -8 13D

1    NAME OF REPORTING PERSONS
           I.R.S. IDENTIFICATION NOS. OF ABOVE PERSONS (ENTITIES ONLY)
           Abbott Laboratories (# 36-0698440)
- --------------------------------------------------------------------------------
2    CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP
           (a) (_) (b) (_)
- --------------------------------------------------------------------------------
3    SEC USE ONLY
- --------------------------------------------------------------------------------
4    SOURCE OF FUNDS
           WC
- --------------------------------------------------------------------------------
5    CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED
     PURSUANT TO ITEM 2(d) or 2(e)             (_)
- --------------------------------------------------------------------------------
6    CITIZENSHIP OR PLACE OF ORGANIZATION
           Illinois
- --------------------------------------------------------------------------------
                             7     SOLE VOTING POWER
                                         24,156,971 shares of Common Stock
NUMBER OF                    ---------------------------------------------------
SHARES                       8     SHARED VOTING POWER
BENEFICIALLY                             0
OWNED BY                     ---------------------------------------------------
EACH                         9     SOLE DISPOSITIVE POWER
REPORTING                                24,156,971 shares of Common Stock
PERSON                       ---------------------------------------------------
WITH                         10    SHARED DISPOSITIVE POWER
                                         0
- -------------------------------------------------------------------------------
11   AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
           24,156,971 shares of Common Stock
- --------------------------------------------------------------------------------
12   CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
           CERTAIN SHARES                (_)
- --------------------------------------------------------------------------------
13   PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)
           49%
- --------------------------------------------------------------------------------
14   TYPE OF REPORTING PERSON
           CO
- --------------------------------------------------------------------------------


                                  Page 2 of 12
<PAGE>

ITEM 1.    SECURITY AND ISSUER

     This statement relates to the common stock, par value $0.001 per share
(the "Common Stock") of SuperGen, Inc., a Delaware corporation (the
"Issuer"). The Issuer's principal executive offices are located at 2 Annabel
Lane, Suite 220, San Ramon, California 94583.

ITEM 2. IDENTITY AND BACKGROUND

     (a) - (c)   This statement is being filed by Abbott Laboratories, an
Illinois corporation ("Abbott"). Abbott's principal offices are located at
100 Abbott Park Road, Abbott Park, Illinois 60064. Abbott's principal
business is the discovery, development, manufacture and sale of a broad and
diversified line of health care products and services. The names, business
addresses and principal occupation or employment (and the name, principal
business and address of any corporation or other organization in which such
employment is conducted) of each of the persons specified by Instruction C of
the Schedule 13D is set forth on Schedule 1 hereto.

     (d) - (e)   To the knowledge of Abbott, neither Abbott nor any of the
persons specified in Schedule 1 has, during the last five years, been
convicted in a criminal proceeding (excluding traffic violations or similar
misdemeanors) or has been a party to a civil proceeding of a judicial or
administrative body of competent jurisdiction and as a result of such
proceeding was or is subject to a judgment, decree or final order enjoining
future violations of, or prohibiting or mandating activities subject to,
Federal or State securities laws or finding any violation with respect to
such laws.

     (f)   See (a) - (c) above.

ITEM 3.    SOURCE AND AMOUNT OF FUNDS OR OTHER CONSIDERATION

     The Issuer granted Abbott an option (the "Option") under the Common
Stock and Option Purchase Agreement made as of December 21, 1999 between the
Issuer and Abbott (the "Equity Agreement"). The aggregate purchase price for
the 24,156,971 shares of Common Stock (the "Shares") that currently are
subject to the Option is $2,053,342,535. The anticipated source of the funds
required to purchase the Shares is the working capital of Abbott.

ITEM 4.    PURPOSE OF THE TRANSACTION

     On December 21, 1999, the Issuer and Abbott executed the Equity
Agreement and a Worldwide Sales, Distribution, and Development Agreement (the
"Worldwide Agreement"). Under the terms of the Equity Agreement and the
Worldwide Agreement, Abbott will make an initial equity investment in the
Issuer. Additional equity investments, cash milestones and option exercises
are contemplated over the life of the agreements. Pursuant to the Worldwide
Agreement, Abbott will have exclusive distribution and promotion rights with
respect to rubitecan outside the United States and co-promotion rights with
the Issuer within the United States. Rubitecan is an oral chemotherapy
compound in the camptothecin class and is currently in Phase III studies for
the treatment of pancreatic cancer.

                                  Page 3 of 12
<PAGE>

     Abbott intends to monitor its interests in the Issuer on an ongoing
basis and to take such measures as it deems appropriate from time to time in
furtherance of such interests. Subject to the limitations set forth in the
Equity Agreement and the Worldwide Agreement, Abbott may from time to time
acquire additional shares of Common Stock, dispose of some or all of the
shares of Common Stock then beneficially owned by it, discuss the Issuer's
business, operations, or other affairs with the Issuer's management, board of
directors, stockholders or others or take such other actions as Abbott may
deem appropriate. Notwithstanding the foregoing, except as described in this
Item 4 or in Item 6 below, Abbott has no present plan or proposal which
relates to or would result in any of the matters referred to in Items (a)
through (j) of Item 4 of Schedule 13D.

ITEM 5.    INTEREST IN SECURITIES OF THE ISSUER

     (a) Abbott may be deemed to be the beneficial owner of the 24,156,971
Shares which currently are subject to the Option. Upon exercise of the
Option, the shares covered by the Option will represent 49% of the total
outstanding shares of Common Stock. This is discussed in greater detail in
Item 6.

     (b) After exercising the Option and at such time as any additional
shareholder approval is obtained for the issuance of the additional Shares,
Abbott will have the sole power to vote and to dispose of all 24,156,971 of
the Shares.

     (c) Other than the execution of the Equity Agreement on December 21,
1999, Abbott has not effected any transactions in the Common Stock in the
past 60 days.

     (d) - (e) Not applicable.

ITEM 6.    CONTRACTS, ARRANGEMENTS, UNDERSTANDINGS OR RELATIONSHIPS WITH
RESPECT TO THE SECURITIES OF THE ISSUER

     Reference is made to Item 4 above.

     The following summary of the principal terms of the Equity Agreement
does not purport to be complete and reference is made to the full text of the
agreements which are filed as exhibits to this statement and are incorporated
herein by this reference.

A.   STOCK AND OPTION PURCHASE AGREEMENT (the "Equity Agreement")

     The Equity Agreement:

           (i)   obligates Abbott to buy and the Issuer to sell up to
                 $81,500,000 worth of the Issuer's Common Stock (the
                 "Shares") and

          (ii)   grants to Abbott an option to purchase (the "Option") up to
                 forty-nine percent (49%) of the outstanding shares of Common
                 Stock at the time of exercise of the Option.

     The exercise price of the Option is $85 per share and is subject to
adjustment under Section 5.7 of the Equity Agreement. The Option is
exercisable in whole or in part at any time or from time to time prior to
March 31, 2003. As of December 21, 1999, the Issuer had 25,142,970 shares of
Common Stock

                                  Page 4 of 12
<PAGE>

outstanding. As a result, if Abbott were to exercise the Option to the full
extent, then it would be the owner of 49% of the outstanding shares of Common
Stock, giving Abbott a total of 24,156,971 shares of Common Stock. The number
of shares that are subject to the Option will change from time to time as the
number of outstanding shares of Common Stock changes.

     Subject to the terms and conditions of the Equity Agreement, the
purchase and sale of the Shares will be completed in up to nine (9) tranches
(each a "Tranche," the closing date for each Tranche is referred to as a
"Tranche Closing Date"), at a cash price per share that will be based upon
the average of the closing bid prices of the Issuer's Common Stock over a
specified number of days including the Relevant Date. Relevant Date means,
(i) in the case of the first Tranche, the business day upon which the Issuer
announces the execution of the Worldwide Sales, Distribution and Development
Agreement between the Issuer and Abbott (the "Worldwide Agreement"); (ii) in
the case of the second Tranche, the business day upon which the condition set
forth in Section 5.1(b) of the Worldwide Agreement is first satisfied; (iii)
in the case of the third Tranche, the business day upon which the condition
set forth in Section 5.1(b) of the Worldwide Agreement is next satisfied;
(iv) in the case of the fourth Tranche, the business day upon which the
condition set forth in Section 5.1(c)(i) of the Worldwide Agreement is
satisfied; (v) in the case of the fifth Tranche, the business day upon which
the condition set forth in Section 5.1(c)(ii) of the Worldwide Agreement is
satisfied; (vi) in the case of the sixth Tranche (which may be bifurcated
into two (2) separate Tranches), the business day, or the respective business
days, upon which the condition(s) set forth in Section 5.1(h) of the
Worldwide Agreement is/are satisfied; (vii) in the case of the seventh
Tranche (which may be bifurcated into two (2) separate Tranches), the
business day, or the respective business days, upon which the condition(s)
set forth in Section 5.1(j) of the Worldwide Agreement is/are satisfied;
(viii) in the case of the eighth Tranche, the business day upon which the
condition set forth in Section 5.1(n) of the Worldwide Agreement is
satisfied; and (ix) in the case of the ninth Tranche, the business day upon
which the condition set forth in Section 5.1(p) of the Worldwide Agreement is
satisfied. The number of Shares to be purchased in each Tranche will be that
number of Shares which, at the purchase price specified above, are valued as
near as possible to the dollar value set forth in the corresponding section
of the Worldwide Agreement (which, for purposes of the first Tranche, is
Section 5.1(a)). No fractions of any Shares will be allotted pursuant to the
Equity Agreement and the obligations of Abbott to purchase Shares will be
rounded down to the nearest whole number of Shares.

     Purchase and sale of the Shares for the first Tranche will take place in
accordance with the provisions of Section 5.1(a) of the Worldwide Agreement
at a closing to occur upon the satisfaction of all of the conditions set
forth in Sections 6.1 and 6.2 of the Equity Agreement and Section 16.13 of
the Worldwide Agreement; the purchase and sale of the Shares for the second
Tranche will take place at a closing to occur on the fifth business day
following the first satisfaction of the condition set forth in Section 5.1(b)
of the Worldwide Agreement; the purchase and sale of the Shares for the third
Tranche will take place at a closing to occur on the fifth business day
following the next satisfaction of the condition set forth in Section 5.1(b)
of the Worldwide Agreement; the purchase and sale of the Shares for the
fourth Tranche will take place at a closing to occur on the fifth business
day following satisfaction of the condition set forth in Section 5.1(c)(i) of
the Worldwide Agreement; the purchase and sale of the Shares for the fifth
Tranche will take place at a closing to occur on the fifth business day
following satisfaction of the condition set forth in Section 5.1(c)(ii) of
the Worldwide Agreement; the purchase and sale of the Shares for the sixth
Tranche will take place at a closing to occur on the fifth business day
following satisfaction of the condition set forth in Section 5.1(h) of the
Worldwide Agreement (provided


                                  Page 5 of 12
<PAGE>

that if the sixth Tranche is bifurcated into two (2) Tranches in accordance
with the terms of Section 5.1(h) of the Worldwide Agreement, each Tranche
will take place at a closing to occur on the fifth business day following
satisfaction of the relevant alternative condition set forth in Section
5.1(h) of the Worldwide Agreement); the purchase and sale of the Shares for
the seventh Tranche will take place at a closing to occur on the fifth
business day following satisfaction of the condition set forth in Section
5.1(j) of the Worldwide Agreement (provided that if the seventh Tranche is
bifurcated into two (2) Tranches in accordance with the terms of Section
5.1(j) of the Worldwide Agreement, each Tranche will take place at a closing
to occur on the fifth business day following satisfaction of the relevant
alternative condition set forth in Section 5.1(j) of the Worldwide
Agreement); the purchase and sale of the Shares for the eighth Tranche will
take place at a closing to occur on the fifth business day following
satisfaction of the condition set forth in Section 5.1(n) of the Worldwide
Agreement; and the purchase and sale of the Shares for the ninth Tranche will
take place at a closing to occur on the fifth business day following
satisfaction of the condition set forth in Section 5.1(p) of the Worldwide
Agreement.

     Each closing of a purchase of shares of Common Stock under the Option
(an "Option Closing") will occur at the offices of the Company at 9:00 a.m.
California time (or such other time and place as may be agreed by the
parties) on a date designated by Purchaser in an Exercise Notice delivered
not less than five (5) and not more than twenty (20) business days prior to
the date of such Option Closing.

B.   Registration Rights Agreement

     If requested in writing by Abbott, the Issuer agrees to enter into a
registration rights agreement, in the form attached to the Equity Agreement
as Exhibit 5.10 (and attached to this Schedule 13D as Exhibit 99.2, prior to
Abbott's sale of any of the Shares acquired under the Equity Agreement.

ITEM 7.    MATERIAL TO BE FILED AS EXHIBITS.

<TABLE>
<CAPTION>
EXHIBIT NO.      DESCRIPTION
- -----------      -----------
<S>              <C>
99.1*            Stock and Option Purchase Agreement made as of December 21,
                 1999.
99.2             Registration Rights Agreement
99.3*            Worldwide Sales, Distribution, and Development Agreement
                 made as of December 21, 1999.

</TABLE>

- -----------------

* Portions of these documents have been omitted pursuant to a request for
  confidential treatment under Rule 24b-2 of the Securities Exchange Act of
  1934, as amended.


                                  Page 6 of 12
<PAGE>

                                   SCHEDULE 1

                  Information Concerning Executive Officers and
                        Directors of Abbott Laboratories

     The current corporate officers and directors of Abbott Laboratories are
listed below. The address of Abbott Laboratories is: Abbott Laboratories, 100
Abbott Park Road, Abbott Park, Illinois 60064-3500. Abbott Laboratories does
not consider all of its corporate officers to be executive officers as
defined by the Securities Exchange Act of 1934 or Releases thereunder. Unless
otherwise indicated, all positions set forth below opposite an individual's
name refer to positions within Abbott Laboratories, and the business address
listed for each individual not principally employed by Abbott Laboratories is
also the address of the corporation or other organization which principally
employs that individual.


<TABLE>
<CAPTION>

                                       POSITION/PRESENT PRINCIPAL
                                        OCCUPATION OR EMPLOYMENT
NAME                                      AND BUSINESS ADDRESS              CITIZENSHIP
- -----------------------------  -------------------------------------------  -------------
<S>                            <C>                                          <C>
CORPORATE OFFICERS
- -----------------------------

Miles D. White (1)             Chairman of the Board and Chief              U.S.A.
                               Executive Officer

Robert L. Parkinson, Jr.(1)    President and Chief Operating Officer        U.S.A.

Joy A. Amundson (1)            Senior Vice President, Ross Products         U.S.A.

Chistopher B. Begley (1)       Senior Vice President,                       U.S.A.
                               Chemical & Agricultural Products

Thomas D. Brown (1)            Senior Vice President, Diagnostic            U.S.A.
                               Operations

Gary P. Coughlan (1)           Senior Vice President, Finance and Chief     U.S.A.
                               Financial Officer

Jose M. de Lasa (1)            Senior Vice President, Secretary and         U.S.A.
                               General Counsel

William G. Dempsey (1)         Senior Vice President, International         U.S.A.
                               Operations

Richard A. Gonzalez (1)        Senior Vice President, Hospital Products     U.S.A.

Arthur J. Higgins (1)          Senior Vice President, Pharmaceutical        United Kingdom
                               Operations

</TABLE>


                                  Page 7 of 12
<PAGE>

<TABLE>
<CAPTION>

                                       POSITION/PRESENT PRINCIPAL
                                        OCCUPATION OR EMPLOYMENT
NAME                                      AND BUSINESS ADDRESS              CITIZENSHIP
- -----------------------------  -------------------------------------------  -------------
<S>                            <C>                                          <C>
Thomas M. Wascoe (1)           Senior Vice President, Human Resources       U.S.A.

Catherine V. Babington         Vice President, Investor Relations and       U.S.A.
                               Public Affairs

Patrick J. Balthrop            Vice President, Diagnostic Commercial        U.S.A.
                               Operations

Mark E. Barmak                 Vice President, Government Affairs           U.S.A.

Michael G. Beatrice            Vice President, Corporate                    U.S.A.
                               Regulatory and Quality Science

Christopher A. Bleck           Vice President, Pediatrics, Ross Products    U.S.A.

Douglas C. Bryant              Vice President, Diagnostic Operations,       U.S.A.
                               Asia and Pacific

Gary R. Byers                  Vice President, Internal Audit               U.S.A.

Thomas F. Chen                 Vice President, Pacific, Asia, and Africa    U.S.A.
                               Operations

Kenneth W. Farmer              Vice President, Management Information       U.S.A.
                               Services and Administration

Edward J. Fiorentino           Vice President, Pharmaceutical Products,     U.S.A.
                               Marketing and Sales

Gary L. Flynn (1)              Vice President and Controller                U.S.A.

Thomas C. Freyman              Vice President, Hospital Products            U.S.A.
                               Controller

Stephen R. Fussell             Vice President, Compensation and             U.S.A.
                               Development

David B. Goffredo              Vice President, European Operations          U.S.A.

Robert B. Hance                Vice President, Diagnostic Operations,       U.S.A.
                               Europe, Africa and Middle East

</TABLE>


                                  Page 8 of 12
<PAGE>

<TABLE>
<CAPTION>

                                       POSITION/PRESENT PRINCIPAL
                                        OCCUPATION OR EMPLOYMENT
NAME                                      AND BUSINESS ADDRESS              CITIZENSHIP
- -----------------------------  -------------------------------------------  -------------
<S>                            <C>                                          <C>
Guillermo A. Herrera           Vice President, Latin America and            Colombia
                               Canada Operations

James J. Koziarz               Vice President, Diagnostic Products          U.S.A.
                               Research and Development

Elaine R. Leavenworth          Vice President, Abbott                       U.S.A.
                               HealthSystems

John M. Leonard                Vice President, Pharmaceutical               U.S.A.
                               Development

Greg W. Linder                 Vice President and Treasurer                 U.S.A.

John F. Lussen                 Vice President, Taxes                        U.S.A.

Edward L. Michael              Vice President, Diagnostic Assays and        U.S.A.
                               Systems

Daniel W. Norbeck              Vice President, Pharmaceutical Discovery     U.S.A.

Edward A. Ogunro               Vice President, Hospital Products            U.S.A.
                               Research and Development

William H. Stadtlander         Vice President, Ross Medical Nutritional     U.S.A.
                               Products

Marcia A. Thomas               Vice President, Diagnostic Quality           U.S.A.
                               Assurance and Regulatory Affairs
                               and Compliance

Steven J. Weger, Jr.           Vice President, Corporate Planning and       U.S.A.
                               Development

Susan M. Widner                Vice President, Diagnostic Operations,       U.S.A.
                               U.S. and Canada

Lance B. Wyatt                 Vice President, Corporate Engineering        U.S.A.

</TABLE>


                                  Page 9 of 12
<PAGE>

<TABLE>
<CAPTION>

                                       POSITION/PRESENT PRINCIPAL
                                        OCCUPATION OR EMPLOYMENT
NAME                                      AND BUSINESS ADDRESS              CITIZENSHIP
- -----------------------------  -------------------------------------------  -------------
<S>                            <C>                                          <C>
DIRECTORS
- -----------------------------

H. Laurance Fuller             Co-Chairman of the Board BP Amoco,           U.S.A.
                               p.l.c.
                               c/o Primary Business Center
                               1111 E. Warrenville Road, Suite 257
                               Naperville, Illinois 60563 (integrated
                               petroleum and chemicals company)

David A. Jones U.S.A.          Chairman of the Board Humana Inc.            U.S.A.
                               500 W. Main Street
                               Humana Building
                               Louisville, Kentucky 40201
                               (health plan business)

Jeffrey M. Leiden, M.D.,       Elkan R. Blout Professor of Biological       U.S.A.
Ph.D.                          Sciences, Harvard School of Public
                               Health, Professor of Medicine, Harvard
                               Medical School Laboratory of
                               Cardiovascular Biology,
                               677 Huntington Avenue, Building II
                               Room 117
                               Boston, Massachusetts 02115

The Rt. Hon. the Lord          Physician, Politician, and Businessman       United Kingdom
Owen CH                        78 Narrow Street
                               Limehouse, London, E14 8BP, England

Robert L. Parkinson, Jr.       Officer of Abbott                            U.S.A.

Boone Powell, Jr.              President and Chief Executive Officer        U.S.A.
                               Baylor Health Care System and Baylor
                               University Medical Center
                               3500 Gaston Avenue
                               Dallas, Texas 75246

Addison Barry Rand             Chairman and Chief Executive Officer         U.S.A.
                               Avis Rent A Car, Inc.
                               900 Old Country Road
                               Garden City, New York 11530
                               (car rental business)
</TABLE>


                                  Page 10 of 12
<PAGE>

<TABLE>
<CAPTION>

                                       POSITION/PRESENT PRINCIPAL
                                        OCCUPATION OR EMPLOYMENT
NAME                                      AND BUSINESS ADDRESS              CITIZENSHIP
- -----------------------------  -------------------------------------------  -------------
<S>                            <C>                                          <C>
W. Ann Reynolds, Ph.D.         President The University of Alabama at       U.S.A.
                               Birmingham
                               Office of the President
                               Suite 1070 Administration Building
                               701 S. 20th Street
                               Birmingham, Alabama 35294-0110

Roy S. Roberts                 Vice President and Group Executive           U.S.A.
                               North American Vehicle Sales, Service
                               and Marketing
                               General Motors Corporation
                               200 Renaissance Center
                               Mail Code 482-B33-B82
                               Detroit, Michigan 48265
                               (manufacturer of motor vehicles)

William D. Smithburg           Retired Chairman, President and Chief        U.S.A.
                               Executive Officer
                               The Quaker Oats Company
                               676 N. Michigan Avenue
                               Chicago, Illinois 60611
                               (worldwide food manufacturer and
                               marketer of beverages and grain-based
                               products)

John R. Walter                 Chairman Manpower Inc. 5301 North            U.S.A.
                               Ironwood Road
                               Milwaukee, Wisconsin 53217
                               (employment services organization)

William L. Weiss               Chairman Emeritus, Ameritech                 U.S.A.
                               Corporation
                               One First National Plaza
                               Suite 2530C
                               Chicago, Illinois 60603-2006
                               (telecommunications company)

Miles D. White                 Officer of Abbott                            U.S.A.

</TABLE>


                                  Page 11 of 12
<PAGE>

(1) Pursuant to Item 401(b) of Regulation S-K Abbott has identified these
persons as "executive officers" within the meaning of Item 401(b).

                                  Page 12 of 12
<PAGE>

                                    SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete
and correct.

Dated: January 5, 2000


ABBOTT LABORATORIES


By: /s/ Gary P. Coughlan
- --------------------------------------
Name:  Gary P. Coughlan
Title: Senior Vice President, Finance
       and Chief Financial Officer


<PAGE>


                                                           EXHIBIT 99.1

                       CONFIDENTIAL TREATMENT REQUESTED


                                 SUPERGEN, INC.


                            2 ANNABEL LANE, SUITE 220
                           SAN RAMON, CALIFORNIA 94583


                   COMMON STOCK AND OPTION PURCHASE AGREEMENT


                                DECEMBER 21, 1999




<PAGE>

                                TABLE OF CONTENTS
<TABLE>
<CAPTION>

                                                                                              PAGE
                                                                                              ----
<S>                                                                                           <C>

SECTION 1 AUTHORIZATION AND SALE OF SECURITIES...................................................1
         1.1      AUTHORIZATION..................................................................1
         1.2      SALE OF SHARES.................................................................1
         1.3      SALE OF OPTION.................................................................2

SECTION 2 CLOSING DATE; DELIVERY.................................................................2
         2.1      CLOSING........................................................................2
         2.2      DELIVERY.......................................................................3

SECTION 3 REPRESENTATIONS AND WARRANTIES OF THE COMPANY..........................................4
         3.1      ORGANIZATION; STANDING AND POWER; QUALIFICATION................................4
         3.2      CAPITALIZATION.................................................................4
         3.3      AUTHORIZATION; NO CONFLICTS; APPROVALS.........................................4
         3.4      FINANCIAL STATEMENTS...........................................................5
         3.5      ABSENCE OF UNDISCLOSED LIABILITIES.............................................6
         3.6      ABSENCE OF CERTAIN CHANGES OR EVENTS...........................................6
         3.7      TAXES..........................................................................7
         3.8      INTELLECTUAL PROPERTY..........................................................7
         3.9      ENVIRONMENTAL MATTERS..........................................................7
         3.10     SEC FILINGS....................................................................8
         3.11     LISTING........................................................................8
         3.12     EMPLOYEE BENEFIT PLANS.........................................................8
         3.13     EMPLOYEES......................................................................8
         3.14     BROKERS OR FINDERS.............................................................9
         3.15     COMPLIANCE WITH LAWS...........................................................9
         3.16     LITIGATION.....................................................................9
         3.17     NO MISREPRESENTATION...........................................................9
         3.18     INVESTMENT COMPANY............................................................10
         3.19     VALID PRIVATE PLACEMENT.......................................................10
         3.20     SECTION 203...................................................................10

SECTION 4 REPRESENTATIONS AND WARRANTIES OF PURCHASER...........................................10
         4.1      ORGANIZATION..................................................................10
         4.2      AUTHORITY.....................................................................10
         4.3      EXEMPT OFFERING; ACQUISITION FOR INVESTMENT...................................11
         4.4      ACCESS TO INFORMATION; INVESTMENT EXPERIENCE; NO RELIANCE.....................12
         4.5      BROKERS OR FINDERS............................................................13

SECTION 5 ADDITIONAL AGREEMENTS.................................................................13
         5.1      FINANCIAL STATEMENTS AND OTHER REPORTS........................................13
         5.2      CONFIDENTIALITY...............................................................13
         5.3      PUBLIC ANNOUNCEMENTS..........................................................13
         5.4      HSR ACT.......................................................................14
         5.5      RESTRICTIONS ON TRANSFER......................................................14

</TABLE>
                                                     -i-


<PAGE>

                                TABLE OF CONTENTS (CONTINUED)
<TABLE>
<CAPTION>

                                                                                              PAGE
                                                                                              ----
<S>                                                                                           <C>
         5.6      LEGENDS.......................................................................14
         5.7      SHARE ADJUSTMENTS.............................................................15
         5.8      FURTHER ASSURANCES............................................................17
         5.9      USE OF FUNDS..................................................................17
         5.10     REGISTRATION RIGHTS AGREEMENT.................................................17

SECTION 6 CONDITIONS TO CLOSINGS................................................................18
         6.1      CONDITIONS TO PURCHASER'S OBLIGATION TO ACQUIRE THE SHARES....................18
         6.2      CONDITIONS TO COMPANY'S OBLIGATION TO ISSUE THE SHARES........................19
         6.3      CONDITIONS TO ISSUANCE OF OPTION SHARES.......................................20

SECTION 7 MISCELLANEOUS.........................................................................20
         7.1      ACCESS TO INFORMATION.........................................................20
         7.2      WAIVERS AND AMENDMENTS........................................................20
         7.3      GOVERNING LAW.................................................................20
         7.4      SURVIVAL......................................................................20
         7.5      SUCCESSORS AND ASSIGNS........................................................20
         7.6      ENTIRE AGREEMENT..............................................................21
         7.7      NOTICES.......................................................................21
         7.8      SEVERABILITY..................................................................21
         7.9      EXPENSES......................................................................21
         7.10     TITLES AND SUBTITLES..........................................................21
         7.11     CALIFORNIA CORPORATE SECURITIES LAW...........................................21
         7.12     COUNTERPARTS..................................................................22
         7.13     DELAYS OR OMISSIONS...........................................................22
         7.14     DISPUTE RESOLUTION............................................................22

</TABLE>

                                             -ii-

<PAGE>

                                 SUPERGEN, INC.

                   COMMON STOCK AND OPTION PURCHASE AGREEMENT

         THIS COMMON STOCK AND OPTION PURCHASE AGREEMENT (the "AGREEMENT") is
made as of December 21, 1999 by and between SuperGen, Inc., a Delaware
corporation (the "COMPANY"), and Abbott Laboratories, an Illinois corporation
(the "PURCHASER").


                                    SECTION 1

                      AUTHORIZATION AND SALE OF SECURITIES

         1.1 AUTHORIZATION. The Company will, prior to the first Tranche
Closing (as defined below), authorize the sale and issuance of the number of
shares (the "SHARES") of the Company's Common Stock ("COMMON STOCK"),
including the Option Shares (as defined below), pursuant to the terms of this
Agreement.

         1.2 SALE OF SHARES; TRANCHES. Subject to the terms and conditions of
this Agreement, Purchaser agrees to purchase and the Company agrees to sell
and issue to Purchaser, in aggregate, up to $81,500,000 worth of the
Company's Common Stock, to be completed in up to nine (9) tranches (each a
"TRANCHE," the closing date for each Tranche is referred to as a "TRANCHE
CLOSING DATE"), at a cash price per share that shall be
[_______________________]. For purposes of this Agreement, Relevant Date
means, (i) in the case of the first Tranche, the business day upon which the
Company announces the execution of the Worldwide Sales, Distribution and
Development Agreement between the Company and Purchaser (the "Worldwide
Agreement"); (ii) in the case of the second Tranche, the business day upon
which the condition set forth in Section 5.1(b) of the Worldwide Agreement is
first satisfied; (iii) in the case of the third Tranche, the business day
upon which the condition set forth in Section 5.1(b) of the Worldwide
Agreement is next satisfied; (iv) in the case of the fourth Tranche, the
business day upon which the condition set forth in Section 5.1(c)(i) of the
Worldwide Agreement is satisfied; (v) in the case of the fifth Tranche, the
business day upon which the condition set forth in Section 5.1(c)(ii) of the
Worldwide Agreement is satisfied; (vi) in the case of the sixth Tranche
(which may be bifurcated into two (2) separate Tranches), the business day,
or the respective business days, upon which the condition(s) set forth in
Section 5.1(h) of the Worldwide Agreement is/are satisfied; (vii) in the case
of the seventh Tranche (which may be bifurcated into two (2) separate
Tranches), the business day, or the respective business days, upon which the
condition(s) set forth in Section 5.1(j) of the Worldwide Agreement is/are
satisfied; (viii) in the case of the eighth Tranche, the business day upon
which the condition set forth in Section 5.1(n) of the Worldwide Agreement is
satisfied; and (ix) in the case of the ninth Tranche, the business day upon
which the condition set forth in Section 5.1(p) of the Worldwide Agreement is
satisfied. The number of Shares to be purchased in each Tranche


                                       -1-
<PAGE>


shall be that number of Shares which, at the purchase price specified above,
are valued as near as possible to the dollar value set forth in the
corresponding section of the Worldwide Agreement (which, for purposes of the
first Tranche, is Section 5.1(a)). No fractions of any Shares shall be
allotted pursuant to this Agreement and the obligations of Purchaser to
purchase Shares hereunder shall be rounded down to the nearest whole number
of Shares.

         1.3 SALE OF OPTION. Subject to the terms and conditions of this
Agreement, Purchaser agrees to purchase and the Company agrees to sell an
option to purchase (the "OPTION") up to forty-nine percent (49%) of the
outstanding shares of Common Stock at the time of the exercise of the Option
at $85 per share (the "OPTION EXERCISE PRICE") (such price to be adjusted
pursuant to Section 5.7), which Option shall be exercisable at any time or
from time to time prior to March 31, 2003 (the "OPTION TERMINATION DATE")
(shares to be purchased pursuant to the Option are hereinafter referred to as
the "OPTION SHARES," and together with the Shares, "SECURITIES"), subject
to authorization by SuperGen's shareholders of the Option Shares to be
acquired.

                                    SECTION 2

                             CLOSING DATE; DELIVERY

         2.1 CLOSING. Purchase and sale of the Shares for the first Tranche
hereunder shall take place in accordance with the provisions of Section
5.1(a) of the Worldwide Agreement at a closing to occur upon the satisfaction
of all of the conditions set forth in Sections 6.1 and 6.2 hereof and Section
16.13 of the Worldwide Agreement (the "FIRST TRANCHE CLOSING DATE"); the
purchase and sale of the Shares for the second Tranche hereunder shall take
place at a closing to occur on the fifth business day following the first
satisfaction of the condition set forth in Section 5.1(b) of the Worldwide
Agreement; the purchase and sale of the Shares for the third Tranche
hereunder shall take place at a closing to occur on the fifth business day
following the next satisfaction of the condition set forth in Section 5.1(b)
of the Worldwide Agreement; the purchase and sale of the Shares for the
fourth Tranche hereunder shall take place at a closing to occur on the fifth
business day following satisfaction of the condition set forth in Section
5.1(c)(i) of the Worldwide Agreement; the purchase and sale of the Shares for
the fifth Tranche hereunder shall take place at a closing to occur on the
fifth business day following satisfaction of the condition set forth in
Section 5.1(c)(ii) of the Worldwide Agreement; the purchase and sale of the
Shares for the sixth Tranche hereunder shall take place at a closing to occur
on the fifth business day following satisfaction of the condition set forth
in Section 5.1(h) of the Worldwide Agreement (provided that if the sixth
Tranche is bifurcated into two (2) Tranches in accordance with the terms of
Section 5.1(h) of the Worldwide Agreement, each Tranche shall take place at a
closing to occur on the fifth business day following satisfaction of the
relevant alternative condition set forth in Section 5.1(h) of the Worldwide
Agreement); the purchase and sale of the Shares for the seventh Tranche
hereunder shall take place at a closing to occur on the fifth business day
following satisfaction of the condition set forth in Section 5.1(j) of the
Worldwide Agreement (provided that if the seventh Tranche is bifurcated into
two (2) Tranches in accordance with the terms of Section 5.1(j) of the
Worldwide Agreement, each Tranche shall take place at a closing to occur on
the fifth business day following satisfaction of the relevant alternative
condition set forth in Section 5.1(j) of the Worldwide Agreement); the
purchase and sale of the

                                         -2-

<PAGE>


Shares for the eighth Tranche hereunder shall take place at a closing to
occur on the fifth business day following satisfaction of the condition set
forth in Section 5.1(n) of the Worldwide Agreement; and the purchase and sale
of the Shares for the ninth Tranche hereunder shall take place at a closing
to occur on the fifth business day following satisfaction of the condition
set forth in Section 5.1(p) of the Worldwide Agreement (each a "TRANCHE
CLOSING"). The Tranche Closings shall be held at the offices of Wilson
Sonsini Goodrich & Rosati, 650 Page Mill Road, Palo Alto, California, at
10:00 a.m. local time, on the Tranche Closing Date, or at such other time and
place upon which the Company and Purchaser shall agree.

                  2.1.1 EXERCISE OF OPTION. The Option may be exercised by
Purchaser, in whole or in part, at any time or from time to time prior to 5:00
p.m. California time on the Option Termination Date. In the event that Purchaser
wishes to exercise the Option, Purchaser shall deliver to the Company written
notice (an "EXERCISE NOTICE") specifying the total number of shares of Common
Stock, up to the number of such shares provided by Section 2.1.2, that Purchaser
wishes to purchase. Notwithstanding the expiration or termination of the Option,
Purchaser shall be entitled to receive the shares of Common Stock with respect
to which Purchaser had delivered an Exercise Notice prior to 5:00 p.m. on the
Option Termination Date.

                  2.1.2 OPTION CLOSING. Each closing of a purchase of shares of
Common Stock under the Option (an "OPTION CLOSING") shall occur at the offices
of the Company at 9:00 a.m. California time (or such other time and place as may
be agreed by the parties) on a date designated by Purchaser in an Exercise
Notice delivered not less than five (5) and not more than twenty (20) business
days prior to the date of such Option Closing (the "OPTION CLOSING DATE"). At
each Option Closing: (i) the Company shall deliver to Purchaser or its designee
a single certificate representing the number of shares of Common Stock
designated by Purchaser for purchase in the applicable Exercise Notice (the
"OPTION EXERCISE Number"), such certificate to be registered in the name of
Purchaser or as designated by Purchaser in the Exercise Notice and to bear the
legend set forth in Section 5.6; and (ii) Purchaser shall deliver the aggregate
Option Exercise Price for the shares of Common Stock so designated for purchase
to the Company by wire transfer (in immediately available funds). Upon request
by Purchaser, the Option Closing Date will be deferred as reasonably necessary
until the conditions to consummation of the Option Closing and the Company's
obligation to issue the Option Shares at such Option Closing pursuant to Section
6.3 are satisfied.

         2.2 DELIVERY. At each Tranche Closing and the Option
Closing, the Company shall cause the delivery to Purchaser of certificates
registered in Purchaser's name or as designated by Purchaser in the Exercise
Notice representing the Shares or Option Shares, as the case may be, for
payment of the purchase price therefor as set forth in Section 2.1 above, by
check payable to the Company or wire transfer per the Company's instructions.

                                         -3-

<PAGE>


                                    SECTION 3

                  REPRESENTATIONS AND WARRANTIES OF THE COMPANY

         Except as disclosed in the Company SEC Filings (as defined in Section
3.10) or as set forth in the disclosure schedule previously provided to
Purchaser, the Company represents and warrants to Purchaser as follows:

                  3.1 ORGANIZATION; STANDING AND POWER; QUALIFICATION. The
Company and each of its subsidiaries is a corporation duly organized and
existing under, and by virtue of, the laws of the State of Delaware and is in
good standing under such laws. The Company and each of its subsidiaries has
all requisite corporate power to own, lease and operate its property and to
carry on its businesses, and is duly qualified to do business and is in good
standing as a foreign corporation in any jurisdiction except where the
failure to be so qualified and in good standing would not have a material
adverse effect on the business, assets (including intangible assets),
properties, liabilities (contingent or otherwise), financial condition,
operations, or results of operation of the Company or its subsidiaries, taken
as a whole (a "MATERIAL ADVERSE EFFECT").

                  3.2 CAPITALIZATION. The authorized capital stock of the
Company consists of 40,000,000 shares of Common Stock, $0.001 par value, and
2,000,000 shares of preferred stock, $0.001 par value. As of November 30,
1999, there were 25,142,970 shares of Common Stock issued and outstanding,
3,392,229 shares of Common Stock issuable under the Company's stock option
plans and 7,556,957 shares issuable pursuant to warrants and there were no
issued and outstanding shares of Preferred Stock. All such issued and
outstanding shares have been duly authorized and validly issued, are fully
paid and nonassessable. Except as set forth in Schedule 3.2, no shares of
Common Stock are entitled to preemptive rights or registration rights and
there are no outstanding options, warrants, scrip, rights to subscribe to,
call or commitments of any character whatsoever relating to, or securities or
rights convertible into, any shares of capital stock of the Company.
Furthermore, except as set forth in this Agreement and Schedule 3.2 there are
no contracts or commitments by which the Company is or may become bound to
issue additional shares of the capital stock of the Company or options,
securities or rights convertible into shares of capital stock of the Company.
The Company is not a party to, and it has no knowledge of, any agreement
restricting the voting or transfer of any shares of the capital stock of the
Company other than transfer restrictions imposed to satisfy state and federal
securities laws. Except as set forth in Schedule 3.2, the offer and sale of
all capital stock, convertible securities, rights, warrants, or options of
the Company issued prior to each Tranche Closing complied with all applicable
federal and state securities laws. Each of the Company's subsidiaries is
wholly-owned by the Company.

         3.3 AUTHORIZATION; NO CONFLICTS; APPROVALS.

                  3.3.1 All corporate action on the part of the Company, its
shareholders and its directors necessary for the authorization, execution,
delivery and performance of the Agreement by the Company, the authorization,
sale, issuance and delivery of the Shares, the authorization and issuance of the
Option, and the authorization, sale, issuance and delivery of the Option
Shares (other than shareholder authorization of the Option Shares), and

                                         -4-

<PAGE>


the performance of all of the Company's obligations under the Agreement has
been taken or will be taken prior to the First Tranche Closing Date or the
Option Closing Date. The Agreement and the other documents required to be
executed and delivered by the Company hereunder (collectively, the "TRANSACTION
DOCUMENTS"), when executed and delivered by the Company, shall constitute valid
and binding obligations of the Company, enforceable in accordance with their
terms, subject to laws of general application relating to bankruptcy, insolvency
and the relief of debtors and rules of law governing specific performance,
injunctive relief or other equitable remedies. The Shares and Option Shares,
when issued in compliance with the provisions of this Agreement, will be validly
issued, fully paid and nonassessable, and free of any liens or encumbrances,
other than any permissible liens or encumbrances created by or imposed upon the
Shares and Option Shares by Purchaser; provided, however, that the Shares and
Option Shares are subject to restrictions on transfer under state and/or federal
securities laws and as set forth in this Agreement.

                  3.3.2 The execution and delivery by the Company of this
Agreement and the other Transaction Documents do not, and the consummation of
the transactions contemplated hereby and thereby will not, (i) conflict with, or
result in any violation of or breach of any provision of the Certificate of
Incorporation or Bylaws of the Company, (ii) result in any violation or breach
of, or constitute (with or without notice or lapse of time, or both) a default
under, or give rise to a right of termination, cancellation or acceleration of
any obligation or loss of any benefit under any license, assignment, note,
mortgage, indenture, lease, contract or other agreement or obligation to which
the Company is a party or by which the Company or any of its properties or
assets may be bound, (iii) conflict with or violate any judgment, order, decree,
statute, law, ordinance, rule or regulation or any material permit, concession,
franchise or license applicable to the Company or any of its properties or
assets, except in the case of (ii) for such violations, breaches, defaults,
rights of termination, cancellation or acceleration, or losses of benefits which
would not be reasonably likely to have a Material Adverse Effect.

                  3.3.3 No consent, approval, order or authorization of, or
registration, declaration or filing with, any governmental entity is required
by or with respect to the Company in connection with the execution and
delivery of this Agreement and the other Transaction Documents or the
consummation of the transactions contemplated hereby or thereby, except that
the filing of one or more notification and report forms under the HSR Act may
be required with respect to the acquisition by Purchaser of the Shares and
Option Shares, and except (i) such other consents, approvals, orders,
authorizations, registrations, declarations and filings as may be required
under applicable federal and state securities laws and the laws of any
foreign country, and (ii) such other consents, authorizations, filings,
approvals and registrations which, if not obtained or made, would not be
reasonably likely to have a Material Adverse Effect.

         3.4 FINANCIAL STATEMENTS. The Company has delivered to Purchaser
copies of the Company's audited consolidated financial statements (balance
sheet, statement of operations, statement of shareholders' equity, and
statement of cash flows) for the year ended December 31, 1998 and its
unaudited consolidated financial statements (balance sheet, statement of
operations, statement of shareholders' equity, and statement of cash flows)
for the quarter ended September 30,


                                         -5-

<PAGE>


1999 (the "COMPANY FINANCIAL STATEMENTS"). The Company Financial Statements
were prepared in accordance with generally accepted accounting principles
("GAAP") applied on a consistent basis throughout the periods involved
(except (i) as may be otherwise indicated in such financial statements or the
notes thereto or (ii) in the case of unaudited interim statements, to the
extent they may not include footnotes or may be condensed or summary
statements). The Company Financial Statements present fairly in all material
respects the financial position of the Company and its subsidiaries as of the
respective dates and the consolidated results of its operations and cash
flows for the periods indicated (except, in the case of unaudited statements,
to normal year-end audit adjustment).

         3.5 ABSENCE OF UNDISCLOSED LIABILITIES. Neither the Company nor any
of its subsidiaries has any liabilities, either accrued or contingent
(whether or not required to be reflected in financial statements in
accordance with GAAP), and whether due or to become due, other than (i)
liabilities reflected or provided for on the balance sheet as of September
30, 1999 (the "COMPANY BALANCE SHEET") contained in the Company Financial
Statements, (ii) liabilities specifically described in this Agreement or
Schedule 3.5, and (iii) normal or recurring liabilities incurred since
September 30, 1999 in the ordinary course of business consistent with past
practices that would not reasonably be expected to result in a Material
Adverse Effect.

         3.6 ABSENCE OF CERTAIN CHANGES OR EVENTS. Except as set forth in
Schedule 3.6, and except as reflected in the Company Financial Statements,
since September 30, 1999, the Company and its subsidiaries have conducted
their businesses in the ordinary course and in a manner consistent with past
practices, and have not:

                  3.6.1 suffered any event or occurrence that has had or would
reasonably be expected to have a Material Adverse Effect;

                  3.6.2 declared, set aside or paid any dividend or made any
other distribution on or in respect of the shares of its capital stock or
declared any direct or indirect redemption, retirement, purchase or other
acquisition of such shares, except for purchases of stock from terminated
non-officer employees in the ordinary course of business and in a manner
consistent with past practices;

                  3.6.3 issued any shares of their capital stock or any
warrants, rights, or options for, or entered into any commitment relating to
such capital stock, except for issuances made in the ordinary course of business
in arm's length transactions for value and in a manner consistent with past
practices (including issuances made upon exercises and conversions of employee
and director stock options);

                  3.6.4 made any material change in the accounting methods or
practices they follow, whether for general financial or tax purposes, or any
change in depreciation or amortization policies or rates;

                  3.6.5 bought, rented, sold, leased, abandoned or otherwise
disposed of any real property or machinery, equipment or other operating
property except in the ordinary course of


                                         -6-

<PAGE>


business and in a manner consistent with past practices and in an amount
that is not material to the Company and its subsidiaries taken as a whole;

                  3.6.6 sold, assigned, transferred, licensed, pledged, or
otherwise disposed of or encumbered any patent, trademark, trade name, brand
name, Food and Drug Administration ("FDA") license or approval application,
copyright (or pending application for any patent, trademark or copyright),
invention, work of authorship, process, know-how, formula or trade secret or
interest thereunder or other material intangible asset, except for non-exclusive
licenses which were granted in the ordinary course of business and in a manner
consistent with past practices and in an amount that is not material to the
Company and its subsidiaries taken as a whole;

                  3.6.7 entered into any material commitment or transaction
(including without limitation any borrowing or capital expenditure) other than
the transactions contemplated by this Agreement and the other Transaction
Documents; or

                  3.6.8 paid, loaned or advanced any amount to, or sold,
transferred or leased any properties or assets or rights under license to, or
entered into any agreement or arrangement with any of its officers, directors or
shareholders or any affiliate of any of the foregoing, other than employee
compensation and benefits and reimbursement of employment related business
expenses incurred in the ordinary course of business.

         3.7 TAXES. The Company (including its subsidiaries) has timely made
or filed all federal and state income and all other tax returns, reports and
declarations required by any jurisdiction to which it is subject and has paid
all taxes and other governmental assessments and charges, shown or determined
to be due on such returns, reports and declarations, except those being
contested in good faith and has set aside on its books provision reasonably
adequate for the payment of all taxes for periods subsequent to the periods
to which such returns, reports or declarations apply. There are no material
unpaid taxes claimed to be due by the taxing authority of any jurisdiction,
and the officers of the Company know of no basis for any such claim. To the
best knowledge of the Company, there are no pending or proposed audits or
claims from any tax authority for deficiencies, penalties or interest against
the Company or its subsidiaries and the officers of the Company know of no
basis for any such audit or claim

         3.8 INTELLECTUAL PROPERTY. To the Company's knowledge after
reasonable inquiry, (i) each of the Company and its subsidiaries has the
right to use, free and clear of all liens, charges, claims and restrictions,
all intellectual property, patents, trademarks, service marks, trade names,
copyrights, licenses and rights which are material to its business as
presently conducted and (ii) neither the Company nor any of its subsidiaries
is infringing upon or otherwise acting adversely to the right or claimed
right of any other person under or with respect to the foregoing.

         3.9 ENVIRONMENTAL MATTERS. To the Company's knowledge after
reasonable inquiry, neither the Company nor any of its subsidiaries is in
violation of any statute, rule, regulation, decision or order of any
governmental agency or body or any court, domestic or foreign, relating to
the use, disposal or release of hazardous or toxic substances or relating to
the protection or restoration of the

                                     -7-

<PAGE>

environment or human exposure to hazardous or toxic substances (collectively,
"ENVIRONMENTAL LAWS") which, individually or in aggregate, would have a
Material Adverse Effect. Except as set forth on Schedule 3.9, to the
Company's knowledge after reasonable inquiry, neither the Company nor any of
its subsidiaries owns or operates any real property contaminated with any
substance that is subject to any Environmental Laws, is liable for any
off-site disposal or contamination pursuant to any Environmental Laws, or is
subject to any claim relating to any Environmental Laws, which violation,
contamination, liability or claim would individually or in aggregate have a
Material Adverse Effect; and the Company is not aware of any pending
investigation that might lead to such a claim.

         3.10 SEC FILINGS. The Company has timely filed all reports,
registration statements, proxy statements and other materials, together with
any amendments thereto, required to be filed by the Company with the
Securities and Exchange Commission (the "SEC") under the Securities Exchange
Act of 1934, as amended (the "EXCHANGE ACT") (the "SEC FILINGS"). The Company
has furnished to Purchaser copies of its Annual Report on Form 10-K for the
year ended December 31, 1998, its Quarterly Report on Form 10-Q for the
quarter ended September 30, 1999, and all Current Reports on Form 8-K and
proxy statements, as filed with the SEC. As of the date filed, the SEC
Filings do not contain any untrue statement of a material fact or omit to
state a material fact necessary to make the statements therein, in light of
the circumstances in which they were made, not misleading. The financial
statements contained in the SEC Filings fairly present the financial position
of the Company and its subsidiaries as at the dates thereof and for the
periods covered thereby and have been prepared in accordance with GAAP and
with the published rules and regulations of the SEC with respect thereto.

         3.11 LISTING. The Company's Common Stock is duly listed on the
Nasdaq National Market ("NMS"). The Company is not in violation of the
listing requirements of the NMS and does not reasonably anticipate that the
Common Stock will be delisted by the NMS for the foreseeable future.

         3.12 EMPLOYEE BENEFIT PLANS. Except as set forth in Schedule
3.12, all the Company's employee benefit plans comply with and are and have
been operated in accordance with applicable laws and regulations. There are
no funded benefit obligations for which contributions have not been made or
properly accrued and there are no unfunded benefit obligations which have not
been accounted for by reserves on the Company's Financial Statements, and no
event has occurred, and there exists no condition or set of circumstances,
with respect to the employee benefit plans of the Company, which would
reasonably be expected to subject the Company to any liability, other than
liabilities which would not be reasonably likely, either individually or in
the aggregate, to have a Material Adverse Effect.

         3.13 EMPLOYEES. To the Company's knowledge, no employee or
consultant of the Company is in material violation of any material term of
any such employment or consulting agreement, confidentiality agreement, or
any other contract or agreement relating to the relationship


                                     -8-

<PAGE>


of such employee or consultant with the Company or any other party because of
the nature of the business conducted or to be conducted by the Company.

         3.14 BROKERS OR FINDERS. No agent, broker, investment banker,
financial advisor or other firm or person is or will be entitled to any
broker's or finder's fee or any other commission or similar fee in connection
with any of the transactions contemplated by this Agreement or any of the
other Transaction Documents, and the Company agrees to indemnify and hold
Purchaser harmless from and against any and all claims, liabilities or
obligations with respect to any other fees, commissions or expenses asserted
by any person on the basis of any act or statement alleged to have been made
by the Company.

         3.15 COMPLIANCE WITH LAWS. Each of the Company and its subsidiaries
has complied in all material respects with all applicable federal, state,
local and foreign statutes, laws and regulations, and is not in violation of,
and has not received any notices of violation with respect to, any such
statute, law or regulation, with respect to the conduct, ownership or
operation of its businesses which, individually or in aggregate, would have a
Material Adverse Effect. Each of the Company and its subsidiaries has
obtained each governmental consent, license, permit, grant or other
authorization of a governmental entity that is required for the operation of
its business as currently conducted (collectively, the "COMPANY
AUTHORIZATIONS"), and all such Company Authorizations are in full force and
effect, except for such Company Authorizations which, if not obtained by the
Company or any of its subsidiaries, would not be reasonably likely, either
individually or in the aggregate, to have a Material Adverse Effect.

         3.16 LITIGATION. Except as set forth in Schedule 3.16, there is no
action, suit, proceeding, claim, arbitration or investigation, pending before
any agency, court or tribunal, or to the knowledge of the Company,
threatened, against the Company, its subsidiaries or any of their respective
properties or officers or directors (in their capacities as such), and, to
the knowledge of the Company, there is no valid basis for any action, suit,
proceeding, claim, arbitration or investigation, against the Company or any
of its subsidiaries which if determined adversely to the Company or any such
subsidiary, would reasonably be expected to have a Material Adverse Effect.
There is no judgment, decree or order against the Company or any of its
subsidiaries or, to the knowledge of the Company after reasonable inquiry,
any of its respective directors or officers (in their capacities as such)
that would prevent, enjoin, or materially alter or delay any of the
transactions contemplated by this Agreement or that would reasonably be
expected to have a Material Adverse Effect.

         3.17 NO MISREPRESENTATION. No representation or warranty by the
Company in this Agreement or any of the other Transaction Documents, and no
statement, certificate or schedule furnished or to be furnished by or on
behalf of the Company pursuant to this Agreement or any of the other
Transaction Documents, when taken together, contains any untrue statement of
a material fact or omits to state a material fact required to be stated
therein or necessary in order to make such statements, in light of the
circumstances under which they were made, not misleading.

                                  -9-

<PAGE>

         3.18 INVESTMENT COMPANY. The Company is not, and after giving effect
to the issuance of the Shares and the Option Shares will not be, an
investment company under the Investment Company Act of 1940.

         3.19 VALID PRIVATE PLACEMENT. Subject to the accuracy of Purchaser's
representations in Section 4.3, the Company is entitled to rely on an
exemption from the provisions of Section 5 of the Securities Act in its sale
and issuance of Shares and Option Shares to Purchaser pursuant to the terms
of this Agreement.

         3.20 SECTION 203. The purchase of Shares and Option Shares pursuant
to this Agreement has been approved by the Board of Directors of the Company
prior to the date of this Agreement for the purposes of Section 203 of the
Delaware General Corporation Law such that after the date of this Agreement,
neither Purchaser nor any of its affiliates will be subject to the
restrictions on business combination transactions set forth in said Section
203 with respect to the Company on account of such purchase.

                                    SECTION 4

                   REPRESENTATIONS AND WARRANTIES OF PURCHASER

         Purchaser hereby represents and warrants to and agrees with the
Company as follows:

         4.1  ORGANIZATION. Purchaser is duly organized and validly existing
under the laws of the State of Illinois. Purchaser has the requisite power
and authority to enter into this Agreement and to carry out its obligations
hereunder.

         4.2  AUTHORITY.

                  4.2.1 The execution and delivery of this Agreement and the
consummation of the transactions contemplated hereby have been authorized by
all necessary company action on behalf of Purchaser and constitutes the
legal, valid and binding obligation of Purchaser, except as such
enforceability may be limited by bankruptcy, insolvency, moratorium or other
similar laws affecting or relating to creditors' rights generally, and
general principles of equity.

                  4.2.2 No consent, approval, order or authorization of, or
registration, declaration or filing with, any governmental entity is required
by or with respect to Purchaser in connection with the execution and delivery
of this Agreement or the consummation of the transactions contemplated
hereby, except that the filing of one (1) or more notification and report
forms under the HSR Act may be required with respect to the acquisition by
Purchaser of the Shares and Option Shares, and except for (i) such consents,
approvals, orders, authorizations, registrations, declarations and filings as
may be required under applicable federal and state securities laws and the
laws of any foreign country, and (ii) such other consents, authorizations,
filings, approvals and registrations which, if not obtained or made, would
not be reasonably likely to have a material adverse effect on the ability of
Purchaser to execute and deliver this Agreement and to perform its
obligations thereunder.


                                     -10-

<PAGE>

         4.3  EXEMPT OFFERING; ACQUISITION FOR INVESTMENT.

                  4.3.1 Purchaser is acquiring the Shares and Option Shares
solely for Purchaser's or its designated affiliate's own account for passive
investment purposes and not with a view to, or for resale in connection with,
any distribution thereof within the meaning of the Securities Act of 1933, as
amended (the "SECURITIES ACT"). Purchaser further represents that Purchaser
does not have any present intention of selling, offering to sell or otherwise
disposing of or distributing the Shares or Option Shares or any portion
thereof. Purchaser acknowledges and understands that the entire legal and
beneficial interest of the Shares and Option Shares Purchaser is acquiring is
being purchased for, and will be held for the account of, Purchaser or its
designated affiliate only and neither in whole nor in part for any other
person. Purchaser understands that the Shares and Option Shares have not been
registered under the Securities Act or other securities laws in reliance on
specific exemptions therefrom, which exemptions depend upon, among other
things, the bona fide nature of Purchaser's investment intent as expressed
herein.

                  4.3.2 The Shares and Option Shares were not offered to
Purchaser through, and Purchaser is not aware of, any form of general
solicitation or general advertising, including, without limitation, (i) any
advertisement, article, notice or other communication published in any
newspaper, magazine or similar media or broadcast over television or radio,
and (ii) any seminar or meeting whose attendees have been invited by any
general solicitation or general advertising.

                  4.3.3 Purchaser is an "accredited" investor as defined in
Regulation D under the Securities Act, and a "qualified institutional buyer"
within the meaning of Rule 144A under the Securities Act.

                  4.3.4 Purchaser further acknowledges and understands that
the Shares and Option Shares must be held indefinitely unless they are
subsequently registered under the Securities Act or an exemption from such
registration is available, and the transfer complies with the restrictions
set forth in Section 5.5 of this Agreement. Purchaser understands that the
certificate(s) evidencing the Shares and Option Shares will be imprinted with
a legend that sets forth the restrictions on transfer.

                  4.3.5 Purchaser understands that Rule 144 promulgated under
the Securities Act permits limited resale of shares purchased in a private
placement subject to the satisfaction of certain conditions, including, among
other things, the existence of a public market for the Shares and Option
Shares, the availability of certain current public information about the
Company, more than one year having elapsed between the resale and the date
the security to be sold was last held by the Company or an affiliate of the
Company, the sale being made through a "broker's transaction" or in
transactions directly with a "market maker," and the number of shares being
sold during any three-month period not exceeding specified limitations.
Purchaser is further aware that Rule 144(k) permits persons who have not been
affiliates of the Company for at least three months and whose shares have
been beneficially owned by a person other than the Company or its affiliates
for at least two years after full payment for such shares to sell such shares
without regard to the current public information, manner of sale and volume
limitations described above.


                                     -11-

<PAGE>

                  4.3.6 Purchaser has reviewed with its own tax advisers the
federal, state, and local tax consequences of this investment and the
transactions contemplated by this Agreement and has relied solely on such
advisers and not on any statements or representations of the Company or any
of its agents other than the representations and warranties set forth herein.
Purchaser understands that it (and not the Company) shall be responsible for
its own tax liability that may arise as a result of this investment or the
transactions contemplated by this Agreement.

         4.4  ACCESS TO INFORMATION; INVESTMENT EXPERIENCE; NO RELIANCE.

                  4.4.1 ACCESS TO INFORMATION. Purchaser has, prior to the
date of this Agreement, been furnished with the Company's most recent SEC
Filings and given an opportunity to review material contracts and documents
of the Company which have been filed as exhibits to such SEC Filings.
Purchaser has had opportunity to discuss the Company's business, management
and financial affairs with its management. Purchaser has also had an
opportunity to ask questions of officers of the Company, which questions were
answered to its satisfaction. Purchaser, in making the investment decision,
has read, reviewed, and relied solely on the Company's SEC Filings and other
documents furnished by the Company, including the Company's Financial
Statements, pursuant to this Agreement and the Company's representations and
warranties contained herein, and has made an independent investigation, or
obtained any additional information which Purchaser deems necessary to verify
the accuracy and completeness of the information received. Purchaser is not
relying on any oral representation of the Company or any other person, nor
any written representation or assurance from the Company other than those
contained in the SEC Filings or incorporated herein or therein. The
foregoing, however, does not limit or modify Purchaser's right to rely upon
covenants, representations and warranties of the Company in Section 3 of this
Agreement. Purchaser acknowledges and agrees that the Company has no
responsibility for, does not ratify, and is under no responsibility
whatsoever to comment upon or correct any reports, analyses or other comments
made about the Company by any third parties, including, but not limited to,
analysts' research reports or comments, and Purchaser has not relied upon any
such third party reports in making the decision to invest.

                  4.4.2 RISK OF INVESTMENT; INVESTMENT EXPERIENCE; CAPABILITY
TO EVALUATE. Purchaser recognizes that an investment in the Company involves
substantial risks, including the potential loss of Purchaser's entire
investment herein. Purchaser has substantial knowledge and experience in
investing in securities and in financial and business matters that it is
capable of evaluating the merits and risks of the investment. Purchaser
acknowledges that it is able to fend for itself in the transactions
contemplated by this Agreement, and that Purchaser has the ability to bear
the economic risk of investment pursuant to this Agreement.

                  4.4.3 RELIANCE ON OWN JUDGEMENT OR ADVISORS. Purchaser has
relied completely on its own judgement or the advice of its own tax,
investment, legal or other advisors and has not relied on the Company or any
of its affiliates, officers, directors, attorneys, accountants or any
affiliates of any thereof and each other person, if any, who controls any of
the foregoing, within the meaning of Section 15 of the Securities Act for any
tax, investment or legal advice (other than


                                     -12-

<PAGE>

reliance on information furnished by the Company, the representations,
warranties and covenants contained herein).

         4.5  BROKERS OR FINDERS. No agent, broker, investment banker,
financial adviser or other firm or person is or will be entitled to any
broker's or finder's fee, or any other commission or similar fee, in
connection with any of the transactions contemplated by this Agreement or any
of the other Transaction Documents, and Purchaser agrees to indemnify and
hold the Company and its subsidiaries harmless from and against any and all
claims, liabilities or obligations with respect to any such fees or
commissions asserted by any person on the basis of any act or statement
determined to have been made to such person by Purchaser.

                                    SECTION 5

                              ADDITIONAL AGREEMENTS

         The Company and Purchaser further agree with each other as follows:

         5.1  FINANCIAL STATEMENTS AND OTHER REPORTS. As long as Purchaser
beneficially owns, either outright or pursuant to rights to acquire, at least
five percent (5%) of the Common Stock of the Company on either a primary or
fully diluted basis, the Company shall deliver to Purchaser, promptly after
transmission thereof, copies of all such financial statements, proxy
statements, notices and reports as the Company shall send to its public
stockholders and copies of all registration statements (without exhibits),
other than registration statements on Form S-8 or any similar successor form,
and all reports which it files with the SEC (or any governmental body or
agency succeeding to the functions of the SEC). Purchaser shall have the
right to discuss such financial statements, proxy statements, notices,
reports, registration statements and filings with such officers of the
Company as Purchaser may reasonably designate upon reasonable notice and at
reasonable times, and to share such information with Purchaser's professional
advisers, subject to the confidentiality provisions set forth in Section 5.2.

         5.2  CONFIDENTIALITY. Except as permitted by Section 5.3, Purchaser
agrees (and shall cause its professional advisers to agree) not to disclose
to any person any information or data obtained by them pursuant to Section
5.1 until such information or data otherwise becomes publicly available or
except pursuant to a valid subpoena, judicial process or its equivalent or as
otherwise required by law. At the Company's request, Purchaser shall, and
shall cause its professional advisers to, sign a confidentiality agreement,
in form and substance reasonably satisfactory to Purchaser and the Company,
as a condition to the receipt of confidential nonpublic information of the
Company by such advisers pursuant to Section 5.1.

         5.3  PUBLIC ANNOUNCEMENTS. Each of the parties hereto will cooperate
with each other in the development and distribution of all news releases and
other public information disclosures with respect to this Agreement and the
other Transaction Documents and any of the transactions contemplated hereby
and thereby, and neither party hereto directly or indirectly through its
officers


                                     -13-

<PAGE>

and/or directors shall make any further announcement, news release or
disclosure without first consulting with the other party hereto except (a)
with the prior written consent of the other party or (b) to the extent such
party believes in good faith, after consultation with legal counsel, that
such announcement, release or disclosure is required by law. The Company
shall not, and shall cause its officers and directors not to, make or
contribute to any public statement, news release or other public
communication or filing disclosing personal information concerning Purchaser
or any member of Purchaser without the prior written consent of Purchaser and
such member unless the Company believes in good faith, after consultation
with legal counsel, that such statement, release, communication or filing is
required by law.

         5.4  HSR ACT The Company shall be responsible for all applicable
filing fees under the Hart Scott Rodino Antitrust Improvements Act of 1976
(the "HSR ACT") relating to the acquisition of Shares and Option Shares.
Purchaser shall use its best efforts to cooperate with the Company in making
the applicable filings under the HSR Act, and with respect to the exercise of
the Option, Purchaser agrees not to designate an Option Closing Date on any
date prior to the expiration or early termination of the applicable waiting
periods under the HSR Act.

         5.5  RESTRICTIONS ON TRANSFER. Purchaser shall not, directly or
indirectly, sell, transfer, assign, pledge, distribute or otherwise dispose
of, or grant any option with respect to, establish any "short" or
put-equivalent position with respect to, or otherwise enter into any
agreement, arrangement, transaction or series of transactions (through
derivatives or otherwise) which has or is intended to have the effect,
directly or indirectly, of reducing Purchaser's risk of ownership in the
Shares or Option Shares (each of the foregoing, a "Transfer") unless the
Transfer is effected pursuant to (a) a registration statement under the
Securities Act and any applicable state securities laws or (b) an exemption
from the registration requirements under federal and state securities laws,
and the Company receives an opinion of counsel, reasonably satisfactory to
the Company stating that such Transfer will not require registration of the
Shares or the Option Shares, as the case may be, under the Securities Act or
state securities laws, except that such an opinion will not be required for
transactions made pursuant to Rule 144 provided that Purchaser and
Purchaser's broker, if necessary, provide the Company with the necessary
representations for counsel to the Company to issue an opinion with respect
to such transaction.

         5.6  LEGENDS. Each certificate representing Shares and Option Shares
shall be endorsed with the following legends, and any other legends required
by law:

         THE SECURITIES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
         UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY NOT BE SOLD,
         TRANSFERRED, ASSIGNED OR HYPOTHECATED UNLESS THERE IS AN EFFECTIVE
         REGISTRATION STATEMENT UNDER SUCH ACT COVERING SUCH SECURITIES, THE
         SALE IS MADE IN ACCORDANCE WITH RULE 144 UNDER THE ACT, OR THE COMPANY
         RECEIVES AN OPINION OF COUNSEL FOR THE HOLDER OF THESE SECURITIES
         REASONABLY SATISFACTORY TO THE COMPANY, STATING THAT SUCH SALE,
         TRANSFER, ASSIGNMENT OR HYPOTHECATION IS


                                     -14-

<PAGE>

         EXEMPT FROM THE REGISTRATION AND PROSPECTUS DELIVERY REQUIREMENTS OF
         SUCH ACT.

         THE SECURITIES EVIDENCED BY THIS CERTIFICATE ARE SUBJECT TO
         RESTRICTIONS ON TRANSFER SET FORTH IN AN AGREEMENT DATED AS OF DECEMBER
         21, 1999, BY AND BETWEEN SUPERGEN, INC. AND ABBOTT LABORATORIES, A COPY
         OF WHICH AGREEMENT MAY BE OBTAINED AT NO COST BY WRITTEN REQUEST MADE
         BY THE HOLDER OF RECORD OF THIS CERTIFICATE TO THE SECRETARY OF
         SUPERGEN, INC. AT SUPERGEN, INC.'S PRINCIPAL EXECUTIVE OFFICES.

         The Company need not register a transfer of legended Securities, and
may also instruct its transfer agent not to register the transfer of the
Securities, unless the conditions specified in each of the foregoing legends
are satisfied. The first of the foregoing legends shall be removed from any
security legended pursuant to this Section 5.6, and the Company shall issue a
certificate without such legend to the holder of such Securities, if such
Securities are registered under the Securities Act and a prospectus meeting
the requirements of Section 10 of the Securities Act is available or if such
holder satisfies the requirements of Rule 144(k), or the holder provides the
Company with an opinion of counsel, reasonably satisfactory to the Company,
to the effect that a public sale, transfer or assignment of such Securities
may be made without registration. The second of the foregoing legends shall
be removed from any Security legended in accordance with this Section 5.6,
and the Company shall issue a certificate without such legend to the holder
of such Security at such time as such Security is transferred in accordance
with Section 5.5. The stop transfer instructions with respect to any legended
Security shall be removed if both of the foregoing legends are removed in
accordance with this Section 5.6.

         5.7  SHARE ADJUSTMENTS. The following adjustments shall apply to the
then-unexercised portion (if any) of the Option.

                  5.7.1 In the event that the Company shall (i) pay a
dividend in, or make a distribution of, shares of capital stock or other
securities (including, without limitation, any rights or options to subscribe
to or purchase any additional shares of any class of its capital stock, any
evidence of its indebtedness or assets, or any other rights or options) on
its outstanding Common Stock, (ii) subdivide its outstanding shares of Common
Stock into a greater number of such shares or (iii) combine its outstanding
shares of Common Stock into a smaller number of such shares, the total number
of shares of Common Stock purchasable pursuant to the Option shall be
adjusted so that Purchaser shall be entitled to receive at the same aggregate
Option Exercise Price the number of shares of capital stock and other
securities (of one or more classes) which Purchaser would have owned or would
have been entitled to receive immediately following the happening of any of
the events described above had Purchaser acquired all shares of Common Stock
purchasable under the then-unexercised portion of the Option, in full,
immediately prior to the record date with respect to such event. Any
adjustment made pursuant to this Section 5.7.1 shall, in the case of a
dividend or distribution of Common Stock or other securities of the Company,
become effective as of the record


                                     -15-

<PAGE>

date therefor and, in the case of a subdivision or combination, be made as of
the effective date thereof.

                  5.7.2 In the event of a capital reorganization or a
reclassification of the Common Stock (except as provided in Section 5.7.1
above or Section 5.7.3 below), Purchaser shall be entitled to receive, in
substitution for the Common Stock to which Purchaser would have become
entitled upon exercise immediately prior to such reorganization or
reclassification, the shares (of any class or classes) or other securities or
property of the Company (or cash) that Purchaser would have been entitled to
receive at the same Option Exercise Price upon such reorganization or
reclassification if Purchaser had acquired all shares of Common Stock
purchasable under the Option, in full, immediately prior to the record date
with respect to such event; and in any such case, appropriate provision (as
determined by the Board of Directors of the Company, whose reasonable
determination shall be conclusive and, upon request by Purchaser, shall be
evidenced by a certified Board resolution delivered to Purchaser) shall be
made for the application of this Section 5.7.2 with respect to the rights and
interests thereafter of Purchaser (including but not limited to the
allocation of the exercise price between or among shares of classes of
capital stock or other securities), to the end that this Section 5.7.2
(including the adjustments of the number of shares of Common Stock or other
securities purchasable and the exercise price thereof) shall thereafter be
reflected, as nearly as reasonably practicable, in all subsequent conversions
and purchases pursuant to this Agreement for any shares or securities or
other property (or cash) thereafter deliverable upon the conversion or
purchase thereof.

                  5.7.3 In the event of any consolidation or share exchange
reorganization of the Company with, or merger of the Company into, another
corporation (other than a consolidation, share exchange reorganization or
merger which does not result in any reclassification or change of the
outstanding Common Stock), or in case of any sale or conveyance to another
person of the property of the Company as an entirety or substantially as an
entirety, the entity formed by such consolidation, share exchange
reorganization, or merger or the person which shall have acquired such
property, as the case may be, shall execute and deliver to Purchaser a
supplemental agreement providing that Purchaser shall have the right
thereafter (until the expiration of all purchase rights under the Option) to
receive, pursuant to such supplemental agreement, solely the kind and amount
of shares of stock and other securities and property (or cash) receivable
upon such consolidation, share exchange, reorganization, merger, sale or
transfer by a holder of the number of shares of Common Stock of the Company
which Purchaser might have acquired pursuant to the Option immediately prior
to such consolidation, share exchange reorganization, merger, sale or
transfer. Such supplemental agreement shall provide for adjustments, which
shall be as nearly equivalent as may be practicable to the adjustments
provided in this Section 5.7.3.

                  5.7.4 For the purpose of this Section 5.7, the term "COMMON
STOCK" shall mean (i) the class of stock designated as Common Stock in the
Certificate of Incorporation, at the date of this Agreement, or (ii) any
other class of stock resulting from successive changes or reclassifications
of such Common Stock. In the event that at any time as a result of an
adjustment made pursuant to this Section 5.7, Purchaser shall become entitled
to receive any shares of capital stock of the


                                     -16-

<PAGE>

Company other than shares of Common Stock, thereafter the number of such
other shares so receivable pursuant to this Agreement or any of the other
documents required to be executed and delivered by the Company hereunder
shall be subject to adjustment from time to time in a manner and on terms as
nearly equivalent as practicable to the provisions with respect to the Common
Stock contained in this Section 5.7, and all other provisions of this
Agreement and the other Transaction Documents with respect to the Common
Stock shall apply on like terms to any such other shares.

                  5.7.5 Whenever the number of shares of Common Stock
purchasable pursuant to the Option is adjusted as provided in this Section
5.7, the Option Exercise Price for each share of Common Stock payable upon
such exercise shall be adjusted by multiplying such exercise price
immediately prior to such adjustment by a fraction, the numerator of which
shall be the number of shares of Common Stock purchasable pursuant to the
then-unexercised portion of the Option immediately prior to such adjustment,
and the denominator of which shall be the number of shares of Common Stock so
purchasable immediately thereafter.

                  5.7.6 The provisions of this Section 5.7 shall apply
similarly to successive stock dividends, subdivisions and combinations;
successive reorganizations or recapitalizations; and successive
consolidations, share exchange reorganizations, mergers, sales and transfers.

         5.8  FURTHER ASSURANCES

         At any time or from time to time after each Tranche Closing and each
Option Closing, each party shall execute and deliver to the other party or
parties such other documents and instruments, provide such materials and
information and take such other actions as either party may reasonably
request more effectively to carry out the provisions of this Agreement and
the other Transaction Documents.

         5.9  USE OF FUNDS

         The Company shall use the proceeds from the sale of the Shares to
Purchaser and the milestone payments contemplated by Section 5.1 of the
Worldwide Agreement for proper corporate purposes, including allocating in a
responsible manner a sufficient portion of such proceeds and milestone
payments calculated to cause the Company to use its reasonable efforts to
fulfill its obligations under the Worldwide Agreement.

         5.10     REGISTRATION RIGHTS AGREEMENT

         If requested in writing by Purchaser, the Company agrees to enter
into a registration rights agreement, in substantially the form attached
hereto as Exhibit 5.10, prior to Purchaser's sale of any of the Shares
acquired hereunder; provided, however, that the number of requests by Abbott
to register the Shares pursuant to this Section 5.10 shall not exceed, in
aggregate, five (5) times.

                                       -17-

<PAGE>

                                    SECTION 6

                             CONDITIONS TO CLOSINGS

         6.1  CONDITIONS TO PURCHASER'S OBLIGATION TO ACQUIRE THE SHARES. The
obligation of Purchaser to purchase the Shares hereunder is subject to the
satisfaction, on or prior to each Tranche Closing Date (or, where specified,
the First Tranche Closing Date), of the following conditions, any of which
may be waived by Purchaser, in Purchaser's sole discretion, to the extent
permitted by law:

                  6.1.1 REPRESENTATIONS AND WARRANTIES CORRECT. The
representations and warranties made by the Company in this Agreement and the
other Transaction Documents shall be true and correct when made and as of the
First Tranche Closing Date.

                  6.1.2 PERFORMANCE OF OBLIGATIONS. The Company shall have
performed in all material respects all covenants, agreements and other
obligations required to be performed or observed by the Company pursuant to
this Agreement on or prior to the First Tranche Closing Date, and the Company
shall have delivered to Purchaser a certificate to such effect, executed by
the chief executive officer and chief financial officer of the Company and
dated the First Tranche Closing Date.

                  6.1.3 COMPLIANCE WITH LAW. At the time of each Tranche
Closing, the issuance by the Company, and the acquisition by Purchaser, of
the Shares hereunder shall be legally permitted by all laws and regulations
to which Purchaser and the Company are subject; all waiting periods, if any,
under the HSR Act applicable to the issuance and sale of the Shares hereunder
shall have expired or been terminated and no preliminary or permanent
injunction or other order by any court of competent jurisdiction prohibiting
or otherwise restraining such acquisition shall be in effect.

                  6.1.4 WORLDWIDE AGREEMENT. The Worldwide Agreement shall be
in full force and effect and shall not have been terminated by either party
thereto nor shall either party have given notice of such termination.

                  6.1.5 SHARE PURCHASE LIMITATION. Purchaser shall not be
obligated to purchase any Shares on any Tranche Closing Date if and to the
extent that such purchase would result in the aggregate number of Shares
purchased by Purchaser constituting more than nineteen percent (19%) of the
total number of shares of Common Stock issued and outstanding immediately
following the Tranche Closing, provided that Purchaser shall continue to be
obligated to purchase Shares up to and including such number of Shares as
would be as close as possible to nineteen percent (19%) of the total number
of shares of Common Stock issued and outstanding immediately following such
Tranche Closing. If this Section 6.1.5 shall have operated to restrict the
number of Shares to be purchased by Purchaser on any Tranche Closing Date,
(i) Purchaser's obligation to make such purchase shall be tolled for a period
of [__________], and (ii) Purchaser shall remain bound by any subsequent
obligations to purchase Shares hereunder (unless Purchaser is also then
prevented from making any further purchases pursuant to the further operation
of this Section 6.1.5). In the event that the Company increases its share
capital (other than by purchase of any equity interest in the


                                     -18-

<PAGE>

Company by Purchaser) during the [_______] period following the tolling of any
Tranche Closing Date due to the provisions of this Section 6.1.5 such that
Purchaser would then be able to purchase Shares in such delayed Tranche
without exceeding nineteen percent (19%) of the total number of shares of
Common Stock issued and outstanding immediately following such Tranche
Closing, then Purchaser shall be obligated, on the fifth business day
following its receipt of written notification from the Company of such
increase, at the cash price per Share set forth in Section 1.2 for such
Tranche, to purchase such number of additional Shares in such delayed Tranche
which it would have been obligated to purchase but for the operation of this
Section 6.1.5, provided that Purchaser is only obligated to purchase Shares
in any delayed Tranche on one occasion during the [_______] tolling period and
that Purchaser shall be under no obligation to purchase any additional Shares
in any delayed Tranche more than [__________] following the tolling of the
Tranche Closing Date.

                  6.1.6 REGISTRATION RIGHTS AGREEMENT. The Company shall have
executed and delivered a Registration Rights Agreement by and between the
parties hereto (the "Registration Rights Agreement") and the Registration
Rights Agreement shall be in full force and effect and shall not have been
terminated by either party thereto nor shall either party have given notice
of such termination.

         6.2  CONDITIONS TO COMPANY'S OBLIGATION TO ISSUE THE SHARES. The
Company's obligation to sell the Shares to Purchaser hereunder is subject to
the satisfaction, on or prior to the First Tranche Closing Date, of the
following conditions, any of which may be waived by the Company, in its sole
discretion, to the extent permitted by law:

                  6.2.1 REPRESENTATIONS AND WARRANTIES CORRECT. The
representations and warranties made by Purchaser in this Agreement shall be
true and correct when made, and shall be true and correct on the First
Tranche Closing Date with the same force and effect as if they had been made
on and as of the First Tranche Closing Date, and Purchaser shall have
delivered to the Company a certificate to such effect, executed by a duly
authorized officer of Purchaser and dated the First Tranche Closing Date.

                  6.2.2 PERFORMANCE OF OBLIGATIONS. Purchaser shall have
performed in all material respects all covenants, agreements and other
obligations required to be performed or observed by Purchaser pursuant to
this Agreement on or prior to the First Tranche Closing Date, and Purchaser
shall have delivered to the Company a certificate to such effect, executed by
a duly authorized officer of Purchaser and dated the First Tranche Closing
Date.

                  6.2.3 COMPLIANCE WITH LAW. At the time of each Tranche
Closing, the issuance by the Company, and the acquisition by Purchaser, of
the Shares hereunder shall be legally permitted by all laws and regulations
to which either Purchaser or the Company is subject; all waiting periods, if
any, under the HSR Act applicable to the acquisition of such Shares hereunder
shall have expired or been terminated and no preliminary or permanent
injunction or other order by any court of competent jurisdiction prohibiting
or otherwise restraining such acquisition shall be in effect.


                                     -19-

<PAGE>

         6.3  CONDITIONS TO ISSUANCE OF OPTION SHARES. The consummation of
each Option Closing is subject to the conditions that, on or prior to the
applicable Option Closing Date, (i) the representations and warranties made
by the Company and Purchaser in this Agreement shall be true and correct on
the first Option Closing Date, (ii) the issuance by the Company and the
acquisition by Purchaser of the Option Shares hereunder shall be legally
permitted by all laws and regulations to which either Purchaser or the
Company is subject, (iii) all waiting periods, if any, under the HSR Act if
applicable to the acquisition of such Option Shares hereunder shall have
expired or been terminated, (iv) no preliminary or permanent injunction or
other order by any court of competent jurisdiction prohibiting or otherwise
restraining such issuance or acquisition shall be in effect, (v) the
Worldwide Agreement shall be in full force and effect and shall not have been
terminated by either party thereto nor shall either party have given notice
of such termination, and (vi) SuperGen's shareholders shall have authorized
a sufficient number of shares to effect the Option Closing.

                                    SECTION 7

                                  MISCELLANEOUS

         7.1  ACCESS TO INFORMATION. No information or knowledge obtained in
any investigation by Purchaser shall affect or be deemed to modify any
representation or warranty contained in this Agreement or the Transaction
Documents.

         7.2  WAIVERS AND AMENDMENTS. This Agreement or any provision hereof
may be amended, waived, discharged or terminated only by a statement in
writing signed by the party against which enforcement of the amendment,
waiver, discharge or termination is sought.

         7.3  GOVERNING LAW. This Agreement shall be governed in all respects
by the internal laws of the State of Delaware, without respect to the
conflicts or the laws or rules thereof.

         7.4  SURVIVAL. The representations, warranties, covenants and
agreements made in this Agreement shall survive the closings of the
transactions contemplated hereby, notwithstanding any investigation made by
Purchaser. All statements as to factual matters contained in any certificate
delivered by or on behalf of the Company pursuant hereto or in connection
with the transactions contemplated hereby shall be deemed to be
representations and warranties by the Company hereunder as of the date of
such certificate or instrument.

         7.5  SUCCESSORS AND ASSIGNS. Except as expressly provided or
contemplated by this Agreement and the other Transaction Documents, neither
this Agreement nor any right, obligation or interest hereunder shall be
assigned, either in whole or in part, by any party hereto (other than by
operation of law) without the prior written consent of the other parties;
provided, that nothing herein shall prevent or limit the ability of Purchaser
to assign any or all of its rights under this Agreement or any of the other
Transaction Documents to an affiliate. Subject to the foregoing limitations,
the provisions hereof shall inure to the benefit of, and be binding upon and
enforceable by, the parties hereto and their respective successors and
assigns.


                                     -20-

<PAGE>

         7.6  ENTIRE AGREEMENT. This Agreement, the other Transaction
Documents, and the other certificates and documents delivered pursuant hereto
constitute the full and entire understanding and agreement between the
parties with regard to the subjects hereof and supersede any prior and
contemporaneous agreements, understandings, negotiations and discussions,
whether oral or written, of the parties with respect thereto.

         7.7  NOTICES. All notices and other communications required or
permitted hereunder shall be in writing and shall be delivered personally or
by overnight courier or mailed by first class mail, or Express Mail, postage
prepaid, or via facsimile, addressed (a) if to Purchaser, at Abbott
Laboratories, Hospital Products Division, 100 Abbott Park Road, Abbott Park,
IL 60064, Attn: President, Hospital Products Division and Senior Vice
President, International Operations, with a copy of any said notice to be
sent to Abbott Laboratories, Dept. 364, Bldg. AP6D, 100 Abbott Park Road,
Abbott Park, IL 60064, Attn: General Counsel or to such other address
(including electronic mail address) as Purchaser shall have furnished to the
Company in writing or by electronic mail, or (b) if to the Company, to
SuperGen, Inc., Two Annabel Lane, Suite 220, San Ramon, CA 94583, Attn: Dr.
Joseph Rubinfeld, with a copy of any said notice to be sent to Wilson Sonsini
Goodrich & Rosati, 650 Page Mill Road, Palo Alto, CA 94304-1050, Attn: Page
Mailliard, Esq., or to such other address (including electronic mail address)
as the Company shall have furnished to Purchaser in writing or by electronic
mail. Notices that are mailed by (i) first class mail shall be deemed
received three (3) business days after deposit in the mail and (ii) Express
Mail or overnight courier shall be deemed received one (1) business day after
deposit in the mail or delivery to such courier. In the event that the notice
is sent by facsimile, notice shall be deemed to have been received when sent
and confirmed as to receipt.

         7.8  SEVERABILITY. In case any provision of this Agreement shall be
invalid, illegal or unenforceable, the validity, legality and enforceability
of the remaining provisions of this Agreement shall not in any way be
affected or impaired thereby.

         7.9  EXPENSES. The Company and Purchaser shall each bear their own
fees, costs and expenses incurred on their behalf with respect to the
Agreement and the transactions contemplated hereby and any amendments or
waiver thereto.

         7.10  TITLES AND SUBTITLES. The titles and subtitles used in this
Agreement are used for convenience only and are not considered in construing
or interpreting this Agreement.

         7.11  CALIFORNIA CORPORATE SECURITIES LAW. THE SALE OF THE
SECURITIES WHICH ARE THE SUBJECT OF THIS AGREEMENT HAS NOT BEEN QUALIFIED
WITH THE COMMISSIONER OF CORPORATIONS OF THE STATE OF CALIFORNIA AND THE
ISSUANCE OF SUCH SECURITIES OR THE PAYMENT OR RECEIPT OF ANY PART OF THE
CONSIDERATION THEREFOR PRIOR TO SUCH QUALIFICATION IS UNLAWFUL UNLESS THE
SALE OF SECURITIES IS EXEMPT FROM THE QUALIFICATION BY SECTION 25100, 25102,
OR 25105 OF THE CALIFORNIA CORPORATIONS CODE. THE RIGHTS OF ALL


                                     -21-

<PAGE>

PARTIES TO THIS AGREEMENT ARE EXPRESSLY CONDITIONED UPON SUCH QUALIFICATION
BEING OBTAINED, UNLESS THE SALE IS SO EXEMPT.

         7.12 COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which shall be an original, but all of which together
shall constitute one instrument.

         7.13 DELAYS OR OMISSIONS. No delay or omission to exercise any
right, power or remedy accruing to the Company or to Purchaser shall impair
any such right, power or remedy of the Company or Purchaser, nor shall it be
construed to be a waiver of any breach or default under this Agreement and
the other Transaction Documents, or an acquiescence therein or in any similar
breach or default thereafter occurring; nor shall any delay or omission to
exercise any right, power or remedy or any waiver of any single breach or
default be deemed a waiver of any other right, power or remedy or breach or
default theretofore or thereafter occurring. All remedies, either under this
Agreement and the other Transaction Documents, or by law otherwise afforded
to the Company or Purchaser, shall be cumulative and not alternative.

         7.14 DISPUTE RESOLUTION. The parties hereto agree that any disputes
which may arise during the term of this Agreement which relate to either
party's rights and/or obligations hereunder shall be resolved in accordance
with the ADR provisions contained in Exhibit 20.3 of the Worldwide Agreement,
except that either party may seek judicial relief or enforcement to pursue
equitable or other remedies not addressed by the ADR provisions, including
without limitation specific performance or injunctive relief, to pursue a
claim of fraudulent or otherwise inequitable treatment under the ADR
proceedings or to otherwise enforce a judgment under the ADR proceedings.

                            [SIGNATURE PAGE FOLLOWS]


                                     -22-

<PAGE>

         IN WITNESS WHEREOF, Purchaser and the Company have caused this
Agreement to be duly executed as of the date and year first above written.

                                         SUPERGEN, INC.
                                         a Delaware corporation



                                         By:   /s/ Dr. Joseph Rubinfeld
                                               -------------------------------
                                               Name: Dr. Joseph Rubinfeld
                                               Title: Pres.-CEO



                                         ABBOTT LABORATORIES
                                         an Illinois corporation



                                         By:   /s/ Richard A. Gonzalez
                                               -------------------------------
                                               Name: Richard A. Gonzalez
                                               Title: President, HPD



                     [Signature Page to Purchase Agreement]


                                     -23-

<PAGE>

                                     FORM OF

                             COMPLIANCE CERTIFICATE


         Pursuant to Section 6.1 of that certain Common Stock and Option
Purchase Agreement dated as of December 21, 1999 among SuperGen, Inc., a
Delaware corporation (the "Company"), and the Purchaser set forth therein
(the "Agreement"), the undersigned, Joseph Rubinfeld, does hereby certify on
behalf of the Company as follows:

         1.       He is the duly elected Chief Executive Officer of the
                  Company;

         2.       The Company has fulfilled all of the conditions specified
                  in Sections 5 and 6 of the Agreement; and

         3.       Except as set forth in the Agreement and the disclosure
                  schedules provided to the Purchaser, the representations and
                  warranties of the Company set forth in Section 3 of the
                  Agreement are true and correct as of the date hereof.

         IN WITNESS WHEREOF, the undersigned has executed this certificate on
_________ __, 2000.


                                                 ___________________________
                                                 Name:  Joseph Rubinfeld
                                                 Title: Chief Executive Officer


<PAGE>

                       FORM REGISTRATION RIGHTS AGREEMENT


     This Registration Rights Agreement (the "Agreement") is made as of
_______ __, ____ between SuperGen, Inc., a Delaware corporation (the
"Company") and Abbott Laboratories, an Illinois corporation, Inc. (the
"Purchaser") pursuant to the terms of a Common Stock and Option Purchase
Agreement between the parties dated as of December 21, 1999 (the "Purchase
Agreement").

                                    SECTION 1

                 RESTRICTIONS ON TRANSFERABILITY OF SECURITIES;
               COMPLIANCE WITH SECURITIES ACT; REGISTRATION RIGHTS

     1.1   CERTAIN DEFINITIONS. As used in this Agreement, the following
terms shall have the following respective meanings:

     "COMMISSION" shall mean the Securities and Exchange Commission or any
other federal agency at the time administering the Securities Act.

     "COMMON STOCK" shall mean Company Common Stock, par value $0.001 per
share.

     "HOLDER" shall mean (i) the Purchaser and (ii) any person holding
Registrable Securities to whom the rights under this Section 1 have been
transferred in accordance with Section 1.12 hereof.

     "INITIAL HOLDERS" shall mean Holders or transferees of any Holders under
Section 1.12 hereof who in the aggregate are Holders of greater than 50% of
the Registrable Securities.

     "REGISTRABLE SECURITIES" means the Shares until such time that such
securities have been (i) sold to or through a broker or dealer or underwriter
in a public distribution or a public securities transaction, or (ii) sold or
are, in the opinion of counsel for the Company, available for sale in a
single transaction exempt from the registration and prospectus delivery
requirements of the Securities Act so that all transfer restrictions and
restrictive legends with respect thereto are removed upon the consummation of
such sale.

     The terms "REGISTER," "REGISTERED" and "REGISTRATION" refer to a
registration effected by preparing and filing a registration statement in
compliance with the Securities Act, and the declaration or ordering of the
effectiveness of such registration statement.

     "REGISTRATION EXPENSES" shall mean all expenses, except as otherwise
stated below, incurred by the Company in complying with Section 1.5 and 1.6
hereof, including, without limitation, all registration, qualification and
filing fees, printing expenses, escrow fees, fees and disbursements of
counsel for the Company, blue sky fees and expenses, the expense of any
special audits incident to or required by any such registration (but
excluding the compensation of regular employees of the Company which shall be
paid in any event by the Company).


<PAGE>

     "RESTRICTED SECURITIES" shall mean the securities of the Company
required to bear the legend set forth in Section 1.3 hereof.

     "SECURITIES ACT" shall mean the Securities Act of 1933, as amended, or
any similar federal statute and the rules and regulations of the Commission
thereunder, all as the same shall be in effect at the time.

     "SELLING EXPENSES" shall mean all underwriting discounts, selling
commissions and stock transfer taxes applicable to the securities registered
by the Holders and, except as set forth above, all reasonable fees and
disbursements of counsel for any Holder.

     "SHARES" shall mean the shares of Common Stock issued to the Purchaser
pursuant to the Purchase Agreement (not including Option Shares as defined
therein) and any other securities issued in respect of such securities upon
any stock split, stock dividend, recapitalization, merger, consolidation or
similar event.

     1.2   RESTRICTIONS ON TRANSFERABILITY. The Shares shall not be sold,
assigned, transferred or pledged except upon the conditions specified in this
Section 1. The Holder will cause any proposed purchaser, assignee,
transferee, or pledgee of any such shares held by the Holder to agree to take
and hold such securities subject to the provisions and upon the conditions
specified in this Section 1.

     1.3   RESTRICTIVE LEGEND. Each certificate representing Shares and any
other securities issued in respect of the Shares upon any stock split, stock
dividend, recapitalization, merger, consolidation or similar event, shall
(unless otherwise permitted by the provisions of Section 1.4 below) be
stamped or otherwise imprinted with a legend in the following form (in
addition to any legend required under applicable state securities laws):

     THE SECURITIES EVIDENCED BY THIS CERTIFICATE HAVE NOT BEEN
     REGISTERED UNDER THE SECURITIES ACT OF 1933, AS AMENDED, AND MAY
     NOT BE SOLD, TRANSFERRED, ASSIGNED OR HYPOTHECATED UNLESS THERE IS
     AN EFFECTIVE REGISTRATION STATEMENT UNDER SUCH ACT COVERING SUCH
     SECURITIES, THE SALE IS MADE IN ACCORDANCE WITH RULE 144 UNDER THE
     ACT, OR THE COMPANY RECEIVES AN OPINION OF COUNSEL FOR THE HOLDER
     OF THESE SECURITIES REASONABLY SATISFACTORY TO THE COMPANY, STATING
     THAT SUCH SALE, TRANSFER, ASSIGNMENT OR HYPOTHECATION IS EXEMPT
     FROM THE REGISTRATION AND PROSPECTUS DELIVERY REQUIREMENTS OF SUCH
     ACT.

     THE SECURITIES EVIDENCED BY THIS CERTIFICATE ARE SUBJECT TO
     RESTRICTIONS ON TRANSFER SET FORTH IN AN AGREEMENT DATED AS OF
     DECEMBER 21, 1999, BY AND BETWEEN SUPERGEN, INC. AND ABBOTT
     LABORATORIES, A COPY OF WHICH AGREEMENT MAY BE OBTAINED AT NO COST
     BY WRITTEN REQUEST MADE BY THE HOLDER OF RECORD OF THIS CERTIFICATE
     TO THE SECRETARY OF SUPERGEN, INC. AT SUPERGEN, INC.'S PRINCIPAL
     EXECUTIVE OFFICES.


<PAGE>

           Each Holder consents to the Company making a notation on its
records and giving instructions to any transfer agent of the Common Stock in
order to implement the restrictions on transfer established in this Section 1.

     1.4   RESTRICTIONS ON TRANSFER; NOTICE OF PROPOSED TRANSFERS. The holder
of each certificate representing Restricted Securities by acceptance thereof
agrees to comply in all respects with the provisions of this Section 1.4.
Prior to any proposed sale, assignment, transfer or pledge of any Restricted
Securities (other than (i) a transfer not involving a change in beneficial
ownership, (ii) any transfer by any Holder to (A) any individual or entity
controlled by, controlling, or under common control with, such Holder or (B)
any entity with respect to which such Holder (or any person controlled by,
controlling, or under common control with, such Holder) has the power to
direct investment decisions, or (iv) in transactions in compliance with Rule
144), and unless there is in effect a registration statement under the
Securities Act covering the proposed transfer, the holder thereof shall give
written notice to the Company of such holder's intention to effect such
transfer, sale, assignment or pledge. Each such notice shall describe the
manner and circumstances of the proposed transfer, sale, assignment or pledge
in sufficient detail, and shall be accompanied, at such holder's expense by
either (i) a written opinion of legal counsel who shall be, and whose legal
opinion shall be, reasonably satisfactory to the Company addressed to the
Company, to the effect that the proposed transfer of the Restricted
Securities may be effected without registration under the Securities Act, or
(ii) a "no action" letter from the Commission to the effect that the transfer
of such securities without registration will not result in a recommendation
by the staff of the Commission that action be taken with respect thereto,
whereupon the holder of such Restricted Securities shall be entitled to
transfer such Restricted Securities in accordance with the terms of the
notice delivered by the holder to the Company. Each certificate evidencing
the Restricted Securities transferred as above provided shall bear, except if
such transfer is made pursuant to Rule 144, the appropriate restrictive
legend set forth in Section 1.3 above, except that such certificate shall not
bear such restrictive legend if in the opinion of counsel for such holder and
the Company such legend is not required in order to establish compliance with
any provision of the Securities Act. Notwithstanding the foregoing, so long
as an executive officer or director of the Holder serves as an executive
officer or director of the Company, the Holder agrees to not sell or transfer
the Registrable Securities during periods outside of the trading windows
applicable to the officers of the Company as set forth in the Company's
Insider Trading Program adopted by the Company's Board of Directors.

     1.5   REQUESTED REGISTRATION.

           (a)   REQUEST FOR REGISTRATION. In case the Company shall receive
from the Initial Holders a written request that the Company effect any
registration, qualification or compliance with respect to Registrable
Securities, the Company will:

                 (i)   promptly give written notice of the proposed
registration, qualification or compliance to any other Holders; and

                (ii)   as soon as practicable, use its diligent efforts to
effect such registration, qualification or compliance (including, without
limitation, appropriate qualification under applicable blue sky or other
state securities laws and appropriate compliance with applicable regulations
issued under the Securities Act and any other governmental requirements or
regulations) as may be so requested and as would permit or facilitate the
sale and distribution of all or such


<PAGE>

portion of such Registrable Securities as are specified in such request,
together with all or such portion of the Registrable Securities of any Holder
or Holders joining in such request as are specified in a written request
received by the Company within 20 days after receipt of such written notice
from the Company; PROVIDED, HOWEVER, that the Company shall not be obligated
to take any action to effect any such registration, qualification or
compliance pursuant to this Section 1.5:

                       (A)   In any particular jurisdiction in which the
Company would be required to execute a general consent to service of process
in effecting such registration, qualification or compliance unless the
Company is already subject to service in such jurisdiction and except as may
be required by the Securities Act;

                       (B)   Prior to the first anniversary of the issuance
of the Shares;

                       (C)   During the period starting with the date sixty
(60) days prior to the Company's estimated date of filing of, and ending on
the date six (6) months immediately following the effective date of, any
registration statement pertaining to securities of the Company (other than a
registration of securities in a Rule 145 transaction or with respect to an
employee benefit plan), provided that the Company is actively employing in
good faith all reasonable efforts to cause such registration statement to
become effective;

                       (D)   Unless the Registrable Securities sought to be
registered by all Initial Holders and other Holders pursuant to this Section
1.5 comprises at least 500,000 Shares of Registrable Securities;

                       (E)   After the Company has effected five (5) such
registrations pursuant to this Section 1.5(a), and such registrations have
been declared or ordered effective and the securities offered pursuant to
such registrations have been sold; or

                       (F)   If the Company shall furnish to such Holder or
Holders a certificate signed by the President of the Company stating that in
the good faith judgment of the Board of Directors it would be seriously
detrimental to the Company or its shareholders for a registration statement
to be filed in the near future, then the Company's obligation to use its best
efforts to register, qualify or comply under this Section 1.5 shall be
deferred for a period not to exceed 180 days from the date of receipt of
written request from the Initiating Holders, PROVIDED, HOWEVER, that the
Company shall not exercise the right to defer registration granted pursuant
to this paragraph (F) more than one time in any twelve month period.

           Subject to the foregoing clauses (A) through (F), the Company
shall file a registration statement covering the Registrable Securities so
requested to be registered as soon as practicable after receipt of the
request or requests of the Initiating Holders, but in any event within 120
days of such request or requests.

           (b)   UNDERWRITING. In the event that a registration pursuant to
Section 1.5 is for a registered public offering involving an underwriting,
the Company shall so advise the Holders as part of the notice given pursuant
to Section 1.5(a)(i). In such event, the right of any Holder to registration
pursuant to Section 1.5 shall be conditioned upon such Holder's participation
in the underwriting arrangements required by this Section 1.5, and the
inclusion of such Holder's


<PAGE>

Registrable Securities in the underwriting to the extent requested shall be
limited to the extent provided herein.

           The Company shall (together with all Holders proposing to
distribute their securities through such underwriting) enter into an
underwriting agreement in customary form with the managing underwriter
selected for such underwriting by a majority in interest of the Initiating
Holders, but subject to the Company's reasonable approval. Notwithstanding
any other provision of this Section 1.5, if the managing underwriter advises
the Initiating Holders in writing that marketing factors require a limitation
of the number of shares to be underwritten, then the Company shall so advise
all holders of Registrable Securities and the number of shares of Registrable
Securities that may be included in the registration and underwriting shall be
allocated among all Holders thereof in proportion, as nearly as practicable,
to the respective amounts of Registrable Securities held by such Holders at
the time of filing the registration statement. No Registrable Securities
excluded from the underwriting by reason of the underwriter's marketing
limitation shall be included in such registration. To facilitate the
allocation of shares in accordance with the above provisions, the Company or
the underwriters may round the number of shares allocated to any Holder to
the nearest 100 shares.

           If any Holder of Registrable Securities disapproves of the terms
of the underwriting, such person may elect to withdraw therefrom by written
notice to the Company, the managing underwriter and the Initiating Holders.
The Registrable Securities an/or other securities so withdrawn shall also be
withdrawn from registration, and shall not be transferred in a public
distribution prior to 180 days after the effective date of the registration
statement relating thereto, or such other shorter period of time as the
underwriters may require.

     1.6   COMPANY REGISTRATION.

           (a)   NOTICE OF REGISTRATION. If at any time or from time to time,
but in no event earlier than the first anniversary of the issuance of the
Shares, the Company shall determine to register any of its securities, either
for its own account or the account of a security holder or holders, other
than (i) a registration relating solely to employee benefit plans, or (ii) a
registration relating solely to a Commission Rule 145 transaction, the
Company will:

                 (i)   promptly give to each Holder written notice thereof;
and

                (ii)   include in such registration (and any related
qualification under blue sky laws or other compliance), and in any
underwriting involved therein, all the Registrable Securities specified in a
written request or requests, made within twenty (20) days after receipt of
such written notice from the Company, by any Holder.

           (b)   UNDERWRITING. If the registration of which the Company gives
notice is for a registered public offering involving an underwriting, the
Company shall so advise the Holders as a part of the written notice given
pursuant to Section 1.6(a)(i). In such event the right of any Holder to
registration pursuant to Section 1.6 shall be conditioned upon such Holder's
participation in such underwriting and the inclusion of Registrable
Securities in the underwriting to the extent provided herein. All Holders
proposing to distribute their securities through such underwriting shall
(together with the Company and the other holders distributing their
securities through such underwriting) enter into an underwriting agreement in
customary form with the managing underwriter selected for such


<PAGE>

underwriting by the Company. Notwithstanding any other provision of this
Section 1.6, if the managing underwriter determines that marketing factors
require a limitation of the number of shares to be underwritten, the managing
underwriter and the Company may reduce the Registrable Securities to be
included in such registration to the extent the underwriters deem necessary
(to zero if necessary). The Company shall so advise all Holders and other
holders distributing their securities through such underwriting and the
number of shares of Registrable Securities that may be included in the
registration and underwriting shall be allocated among all the Holders in
proportion, as nearly as practicable, to the respective amounts of
Registrable Securities held by such Holder at the time of filing the
Registration Statement. To facilitate the allocation of shares in accordance
with the above provisions, the Company may round the number of shares
allocated to any Holder or holder to the nearest 100 shares. If any Holder or
holder disapproves of the terms of any such underwriting, he may elect to
withdraw therefrom by written notice to the Company and the managing
underwriter. Any securities excluded or withdrawn from such underwriting
shall be withdrawn from such registration, and shall not be transferred in a
public distribution prior to one hundred eighty (180) days after the
effective date of the registration statement relating thereto, or such other
shorter period of time as the underwriters may require.

           (c)   RIGHT TO TERMINATE REGISTRATION. The Company shall have the
right to terminate or withdraw any registration initiated by it under this
Section 1.6 prior to the effectiveness of such registration whether or not
any Holder has elected to include securities in such registration.

     1.7   EXPENSES OF REGISTRATION. All Registration Expenses incurred in
connection with all registrations pursuant to Section 1.5 and 1.6 shall be
borne by the Company. Unless otherwise stated, all Selling Expenses relating
to securities registered on behalf of the Holders and all other Registration
Expenses shall be borne by the Holders of such securities pro rata on the
basis of the number of shares so registered.

     1.8   REGISTRATION PROCEDURES. In the case of each registration,
qualification or compliance effected by the Company pursuant to this Section
1, the Company will keep each Holder advised in writing as to the initiation
of each registration, qualification and compliance and as to the completion
thereof. At its expense the Company will:

           (a)   Prepare and file with the Commission a registration
statement with respect to such securities and use its best efforts to cause
such registration statement to become and remain effective for at least one
hundred eighty (180) days or until the distribution described in the
Registration Statement has been completed; and

           (b)   Furnish to the Holders participating in such registration
and to the underwriters of the securities being registered such reasonable
number of copies of the registration statement, preliminary prospectus, final
prospectus and such other documents as such underwriters may reasonably
request in order to facilitate the public offering of such securities.

     1.9   INDEMNIFICATION.

           (a)   The Company will indemnify each Holder, each of its officers
and directors and partners, and each person controlling such Holder within
the meaning of Section 15 of the Securities Act, with respect to which
registration, qualification or compliance has been effected


<PAGE>

pursuant to this Section 1, and each underwriter, if any, and each person who
controls any underwriter within the meaning of Section 15 of the Securities
Act, against all expenses, claims, losses, damages or liabilities (or actions
in respect thereof), including any of the foregoing incurred in settlement of
any litigation, commenced or threatened, arising out of or based on any
untrue statement (or alleged untrue statement) of a material fact contained
in any registration statement, prospectus, offering circular or other
document, or any amendment or supplement thereto, incident to any such
registration, qualification or compliance, or based on any omission (or
alleged omission) to state therein a material fact required to be stated
therein or necessary to make the statements therein, in light of the
circumstances in which they were made, not misleading, or any violation by
the Company of the Securities Act, the Exchange Act, state securities law or
any rule or regulation promulgated under such laws applicable to the Company
in connection with any such registration, qualification or compliance, and
within a reasonable period the Company will reimburse each such Holder, each
of its officers and directors, and each person controlling such Holder, each
such underwriter and each person who controls any such underwriter, for any
legal and any other expenses reasonably incurred in connection with
investigating, preparing or defending any such claim, loss, damage, liability
or action; provided that the Company will not be liable in any such case to
the extent that any such claim, loss, damage, liability or expense arises out
of or is based on any untrue statement or omission or alleged untrue
statement or omission, made in reliance upon and in conformity with written
information furnished to the Company by an instrument duly executed by such
Holder, controlling person or underwriter and stated to be specifically for
use therein.

           (b)   Each Holder will, if Registrable Securities held by such
Holder are included in the securities as to which such registration,
qualification or compliance is being effected, indemnify the Company, each of
its directors and officers, each underwriter, if any, of the Company's
securities covered by such a registration statement, each person who controls
the Company or such underwriter within the meaning of Section 15 of the
Securities Act, and each other such Holder, each of its officers and
directors and each person controlling such Holder within the meaning of
Section 15 of the Securities Act, against all claims, losses, damages and
liabilities (or actions in respect thereof) arising out of or based on any
untrue statement (or alleged untrue statement) of a material fact contained
in any such registration statement, prospectus, offering circular or other
document, or any omission (or alleged omission) to state therein a material
fact required to be stated therein or necessary to make the statements
therein not misleading, and within a reasonable period will reimburse the
Company, such Holders, such directors, officers, persons, underwriters or
control persons for any legal or any other expenses reasonably incurred in
connection with investigating or defending any such claim, loss, damage,
liability or action, in each case to the extent, but only to the extent, that
such untrue statement (or alleged untrue statement) or omission (or alleged
omission) is made in such registration statement, prospectus, offering
circular or other document in reliance upon and in conformity with written
information furnished to the Company by an instrument duly executed by such
Holder and stated to be specifically for use therein. Notwithstanding the
foregoing, the liability of each Holder under this subsection (b) shall be
limited in an amount equal to the gross proceeds before expenses and
commissions to each Holder received for the shares sold by such Holder,
unless such liability arises out of or is based on willful misconduct by such
Holder.

           (c)   Each party entitled to indemnification under this Section
1.9 (the "Indemnified Party") shall give notice to the party required to
provide indemnification (the "Indemnifying Party") promptly after such
Indemnified Party has actual knowledge of any claim as to which indemnity


<PAGE>

may be sought, and shall permit the Indemnifying Party to assume the defense
of any such claim or any litigation resulting therefrom, provided that
counsel for the Indemnifying Party, who shall conduct the defense of such
claim or litigation, shall be approved by the Indemnified Party (whose
approval shall not unreasonably be withheld), and the Indemnified Party may
participate in such defense at such party's expense, and provided further
that the failure of any Indemnified Party to give notice as provided herein
shall not relieve the Indemnifying Party of its obligations under this
Section 2 unless the failure to give such notice is materially prejudicial to
an Indemnifying Party's ability to defend such action and provided further,
that the Indemnifying Party shall not assume the defense for matters as to
which there is a conflict of interest or separate and different defenses. No
Indemnifying Party, in the defense of any such claim or litigation, shall,
except with the consent of each Indemnified Party, consent to entry of any
judgment or enter into any settlement which does not include as an
unconditional term thereof the giving by the claimant or plaintiff to such
Indemnified Party of a release from all liability in respect to such claim or
litigation.

     1.10  INFORMATION BY HOLDER. The Holder or Holders of Registrable
Securities included in any registration shall furnish to the Company such
information regarding such Holder or Holders, the Registrable Securities held
by them and the distribution proposed by such Holder or Holders as the
Company may request in writing and as shall be required in connection with
any registration, qualification or compliance referred to in this Section 2.

     1.11  RULE 144 REPORTING. With a view to making available the benefits
of certain rules and regulations of the Commission which may at any time
permit the sale of the Restricted Securities to the public without
registration, after such time as a public market exists for the Common Stock
of the Company, the Company agrees to use its best efforts to:

           (a)   Make and keep public information available, as those terms
are understood and defined in Rule 144 under the Securities Act, at all times
after the effective date that the Company becomes subject to the reporting
requirements of the Securities Act or the Exchange Act;

           (b)   Use its best efforts to file with the Commission in a timely
manner all reports and other documents required of the Company under the
Securities Act and the Exchange Act (at any time after it has become subject
to such reporting requirements); and

           (c)   So long as a Holder owns any Restricted Securities to
furnish to the Holder forthwith upon request a written statement by the
Company as to its compliance with the reporting requirements of said Rule 144
(at any time after ninety (90) days after the effective date of the first
registration statement filed by the Company for an offering of its securities
to the general public), and of the Securities Act and the Exchange Act (at
any time after it has become subject to such reporting requirements), a copy
of the most recent annual or quarterly report of the Company, and such other
reports and documents of the Company and other information in the possession
of or reasonably obtainable by the Company as the Holder may reasonably
request in availing itself of any rule or regulation of the Commission
allowing the Holder to sell any such securities without registration.

     1.12  TRANSFER OF REGISTRATION RIGHTS. The rights to cause the Company
to register securities granted Holders under Sections 1.5 and 1.6 may be
assigned to a transferee or assignee


<PAGE>

reasonably acceptable to the Company which acquires at least 250,000 shares
of Registrable Securities in connection with any transfer or assignment of
Registrable Securities by the Holders.

     1.13  STANDOFF AGREEMENT. In connection with any public offering of the
Company's securities, the Holder agrees, upon request of the Company or the
underwriters managing any underwritten offering of the Company's securities,
not to sell, make any short sale of, loan, grant any option for the purchase
of, or otherwise dispose of any Registrable Securities (other than those
included in the registration) without the prior written consent of the
Company or such underwriters, as the case may be, for such period of time
(not to exceed one hundred eighty (180) days) from the effective date of such
registration as may be requested by the underwriters, provided that the
officers and directors of the Company who own stock of the Company and each
holder representing at least 1% ownership of the Company's outstanding Common
Stock also agrees to such restrictions.

     1.14  TERMINATION OF REGISTRATION RIGHTS. The registration rights
granted pursuant to Section 1 shall terminate as to each Holder at such time
as a public market for the Company's Common Stock exists and all Registrable
Securities held by such Holder may, in the opinion of counsel to the Company
(which opinion shall be addressed and rendered to Holder), be sold in a
single three month period pursuant to Rule 144.

                                    SECTION 2

                                  MISCELLANEOUS

     2.1   GOVERNING LAW. This Agreement shall be governed in all respects by
the internal laws of the State of Delaware.

     2.2   SURVIVAL. The covenants and agreements made herein shall survive
the closing of the transactions contemplated hereby.

     2.3   SUCCESSORS AND ASSIGNS. Except as otherwise provided herein, the
provisions hereof shall inure to the benefit of, and be binding upon, the
successors, assigns, heirs, executors and administrators of the parties
hereto.

     2.4   ENTIRE AGREEMENT; AMENDMENT. This Agreement and the Purchase
Agreement constitute the full and entire understanding and agreement between
the parties with regard to the subjects hereof and thereof, and no party
shall be liable or bound to any other party in any manner by any warranties,
representations or covenants except as specifically set forth herein or
therein. Except as expressly provided herein, neither this Agreement nor any
term hereof may be amended, waived, discharged or terminated other than by a
written instrument signed by the party against whom enforcement of any such
amendment, waiver, discharge or termination is sought; provided, however,
that holders of a majority of the Registrable Securities may, with the
Company's prior written consent, waive, modify or amend on behalf of all
holders, any provisions hereof.

     2.5   NOTICES, ETC. All notices and other communications required or
permitted hereunder shall be in writing and shall be mailed by registered or
certified mail, postage prepaid, or otherwise delivered by hand or by
messenger, addressed (a) if to a Holder, at such address as such Holder shall
have furnished the Company in writing, or, until any such holder so furnishes
an address to the


<PAGE>

Company, then to and at the address of the last Holder who has so furnished
an address to the Company, or (b) if to the Company, one copy should be sent
to its address set forth on the cover page of this Agreement and addressed to
the attention of the President, or at such other address as the Company shall
have furnished to the Holders.

           Each such notice or other communication shall for all purposes of
this Agreement be treated as effective or having been given when delivered if
delivered personally, or, if sent by mail, at the earlier of its receipt or
72 hours after the same has been deposited in a regularly maintained
receptacle for the deposit of the United States mail, addressed and mailed as
aforesaid.

     2.6   DELAYS OR OMISSIONS. Except as expressly provided herein, no delay
or omission to exercise any right, power or remedy accruing to any party to
this Agreement upon any breach or default of any other party under this
Agreement, shall impair any such right, power or remedy of such nondefaulting
party nor shall it be construed to be a waiver of any such breach or default,
or an acquiescence therein, or of or in any similar breach or default
thereafter occurring; nor shall any waiver of any single breach or default be
deemed a waiver of any other breach or default theretofore or thereafter
occurring. Any waiver, permit, consent or approval of any kind or character
on the part of any party of any breach or default under this Agreement, or
any waiver on the part of any holder of any provisions or conditions of this
Agreement, must be in writing and shall be effective only to the extent
specifically set forth in such writing. All remedies, either under this
Agreement or by law or otherwise afforded to any party to this Agreement,
shall be cumulative and not alternative.

     2.7   COUNTERPARTS. This Agreement may be executed in any number of
counterparts, each of which shall be enforceable against the parties actually
executing such counterparts, and all of which together shall constitute one
instrument.

     2.8   SEVERABILITY. In the event that any provision of this Agreement
becomes or is declared by a court of competent jurisdiction to be illegal,
unenforceable or void, this Agreement shall continue in full force and effect
without said provision; provided that no such severability shall be effective
if it materially changes the economic benefit of this Agreement to any party.

     2.9   TITLES AND SUBTITLES. The titles and subtitles used in this
Agreement are used for convenience only and are not considered in construing
or interpreting this Agreement.



                          [SIGNATURE PAGE(S) FOLLOW(S)]


<PAGE>

           The foregoing Agreement is hereby executed as of the date first
above written.

                                         "COMPANY"

                                         SUPERGEN, INC.
                                         a Delaware Corporation


                                         By:
                                               -------------------------------
                                               Joseph Rubinfeld
                                               Chief Executive Officer and
                                               President


                                         "PURCHASER"

                                         Abbott Laboratories
                                         a Illinois Corporation


                                         By:
                                               -------------------------------

                                         Name:
                                               -------------------------------

                                         Title:
                                               -------------------------------



                [Signature Page to Registration Rights Agreement]

<PAGE>

                      CONFIDENTIAL TREATMENT REQUESTED

            WORLDWIDE SALES, DISTRIBUTION, AND DEVELOPMENT AGREEMENT


This Sales, Distribution, and Development Agreement (the "Agreement") is made
as of December 21, 1999 by and between SuperGen, Inc., ("SuperGen"), a
California corporation with its principal offices at Two Annabel Lane, Suite
220, San Ramon, California 94583, and Abbott Laboratories, an Illinois
corporation ("Abbott"), with its principal offices at 100 Abbott Park Road,
Abbott Park, Illinois 60064.

RECITALS:

WHEREAS, SuperGen is developing a pharmaceutical compound known as Rubitecan
(as defined below) for the treatment of pancreatic cancer and other
indications;

WHEREAS, SuperGen desires to collaborate with Abbott with respect to the
clinical development, obtaining of regulatory approvals, distribution and
marketing of Rubitecan product(s) throughout the world;

WHEREAS, Abbott desires to collaborate with SuperGen with respect to such
product(s); and

WHEREAS, Abbott and SuperGen shall enter into three other agreements in
support of their collaboration: (i) a U.S. Distribution Agreement pursuant to
which SuperGen will grant to Abbott the right to distribute SuperGen's
product Nipent in the United States (the "U.S. Distribution Agreement"); and
(ii) a Common Stock and Option Purchase Agreement pursuant to which Abbott
shall purchase an equity interest in SuperGen's common stock (the "Stock
Purchase Agreement") (both of which other agreements, along with this
Agreement, collectively referred to as the "SuperGen-Abbott Agreements");

NOW, THEREFORE, in consideration of the foregoing and the mutual covenant
undertakings contained herein, the parties hereto hereby agree as follows:

ARTICLE I:       DEFINITIONS

In addition to the other terms defined elsewhere herein, the following terms
shall have the following meanings when used in this Agreement (and any term
defined in the singular shall have the same meaning when used in the plural,
and vice versa, unless stated otherwise):

1.1  "Abbott Cost of Goods" means (i) with respect to the Net Units of
Product Sold in the U.S. Territory, the [________________________] for the
Net Units of Product Sold in the U.S. Territory during the given calendar
quarter or year; (ii) with respect to the Net Units of Product Sold in the
International Territory, the [________________________] for the Net Units of
Product Sold in the International Territory during the given calendar quarter
or year, and in the event that Sections 8.5(b) or (c) apply, (A) to the
extent that the Compound or

                                                                             1
<PAGE>

Product for the International Territory is sourced from the same Abbott-owned
manufacturing facilities as the facilities used for the Product for the U.S.
Territory, the [________________________] in the U.S. Territory during the
given calendar quarter or year, (B) to the extent that the Compound or
Product is sourced from a different Abbott-owned manufacturing facility, the
[________________________] during the given calendar quarter or year and (C)
to the extent that the Compound or Product is sourced from a Third Party
manufacturer, the [________________________] during the given calendar
quarter or year; and (iii) with respect to the Territories,
[________________________]  Abbott's Cost of Goods shall be calculated
separately for the U.S. Territory and the International Territory.

1.2  "Abbott Distribution Expenses" means, for the U.S. Territory only, a
percentage of Abbott Net Sales in the U.S. Territory during the given
calendar quarter or year, which percentage shall be agreed by the parties no
later than sixty (60) days prior to Launch in the U.S. Territory.

1.3  "Abbott Distribution Margin" means the [________________________] for
the given calendar quarter or year.

1.4  "Abbott Net Sales" means the total gross sales of the Product (as set
forth on the invoice for such Product) by Abbott and permitted Sublicensees
(as defined in Section 2.5(d) below) to Third Parties in the given calendar
quarter or year, plus, if applicable, the fair market value of all properties
and services received in consideration of a sale of Product by Abbott and
permitted Sublicensees to Third Parties during such calendar quarter or year,
less the following deductions directly paid or incurred by Abbott or its
permitted Sublicensees with respect to the sale of the Product in such
calendar quarter or year:

     (i)   with respect to the U.S. Territory, [________________________]

                                                                            2

<PAGE>

     [__________________________] ;

    (ii) with respect to the International Territory,[_____________________];
     and

   (iii) with respect to the Territories (A) [________________________]
     and (B) [________________________].

Abbott's Net Sales shall be calculated separately for the U.S. Territory and
the International Territory.

1.5  "Abbott Operating Margin" means the [________________________] for the
given calendar quarter or year. The Abbott Operating Margin shall be
calculated separately for the U.S. Territory and the International Territory.

1.6  "Abbott SG&A" means the [________________________] which are incurred by
Abbott and/or its permitted Sublicensees in the advertising, Detailing,
sales, marketing and promotion of the Product and, to the extent permitted
under Section 4.4, the [________________________] for the Product during any
given calendar quarter or year, in the categories set forth in Exhibit 1.8.
provided that in no event shall Abbott SG&A include any
[________________________].

1.7  "Abbott Trademark" means the trademark(s) to be selected and registered
by Abbott for the Product in the International Territory.

1.8  "Affiliate" means any corporation or non-corporate business entity which
controls, is controlled by, or is under common control with a Party. A
corporation or non-corporate business entity shall be regarded as in control
of another corporation or non-corporate business entity if it owns, or
directly or indirectly controls, in excess of fifty percent (50%) of the
voting stock of the other corporation, or (a) in the absence of the ownership
of in excess of fifty percent (50%) of the voting stock of a corporation or
(b) in the case of a non-corporate business entity, if it possesses, directly
or indirectly, the power to direct or cause the direction of the management
and policies of such corporation or non-corporate business entity, as
applicable.

1.9  "Co-Promote" or "Co-Promotion" means the joint activities of the Parties
to


                                                                             3
<PAGE>

Promote the Product under the SuperGen Trademark in the U.S. Territory.

1.10 "Competing Product" means any pharmaceutical product
[________________________].

1.11 "Compound" means rubetican, known as 9-nitro-20 (S)-camptothecin, also
known as 4-ethyl-4-hydroxy-9-nitro-1H-pyrano-[3',4':6,7] indolizino [1,2-b]
quinolone-3, 14(4H, 12H)-dione; CAS. Reg. No. 7689-03-4.

1.12 [________________________]

1.13 "Current Good Clinical Practice" means clinical practice as set out in:
(i) current Guidelines for Good Clinical Practice for Trials on Medicinal
Products in the European Union; (ii) US Code of Federal Regulations Title 21,
Chapter 50 (Protection of Human Subjects), Chapter 56 (Institutional Review
Boards), and relevant final FDA Guidance and Points to Consider for drugs
and/or biotechnology-derived products, as may be amended from time to time;
or (iii) the equivalent current law or regulation in any market.

1.14 "Current Good Laboratory Practice" means laboratory practice as set out
in: (i) Rules Governing Medicinal Products in the European Union Vol. III,
ISBN 92.825 9619-2 (ex. OECD principles of GLP), as may be amended from time
to time; (ii) US Code of Federal Regulations, Title 21, Chapter 58 (Good
Laboratory Practice for Nonclinical Laboratory Studies), and relevant final
FDA Guidance and Points to Consider for drugs and/or biotechnology-derived
products, as may be amended from time to time; or (iii) the equivalent
current law or regulation in any market.

1.15 "Current Good Manufacturing Practice" means manufacture in accordance
with: (i) EC Directive 91/456/EEC, as may be amended from time to time; (ii)
the current principles and guidelines of Good Manufacturing Practice for
medicinal products for human use as required by, but not limited to, the
applicable sections of the US Federal Food, Drug and Cosmetic Act, the US
Public Health Service Act, the US Code of Federal Regulations, Title 21,
Parts 210 (CURRENT GOOD MANUFACTURING PRACTICE IN MANUFACTURING, PROCESSING,
PACKING, OR HOLDING OF DRUGS; GENERAL) and 211 (CURRENT GOOD MANUFACTURING
PRACTICES FOR FINISHED PHARMACEUTICALS), and relevant final FDA Guidance and
Points to Consider for drugs and/or biotechnology-derived products, as
amended from time to time; or (iii) the equivalent current law or regulation
in any market.

1.16 "Detail" means a face-to-face sales presentation by a Sales
Representative during which the Product is marketed and promoted to an
appropriate health care professional. This shall include, but not be limited
to, discussions with health care professionals, meetings with or
presentations to managed care entities, purchasing decision-makers or


                                                                             4
<PAGE>

formulary committees of health care providers, and participation in
conventions and continuing education programs.

1.17 "Detailing" means the act of marketing and promoting the Product through
Details.

1.18 "Discretionary Funds" means the miscellaneous costs and expenses which
represent that portion of the U.S. Co-Promotion Budget that are used by the
Sales Representatives in support of their Detailing and marketing activity
for the Product.

1.19 "EMEA" means the European Medicines Evaluation Agency or any successor
entity thereto in the European Union, provided that if submission for
regulatory approval for the Product is made in the EU via the decentralized
procedure, then reference to the "EMEA" in this Agreement shall be deemed a
reference to the appropriate reference member state in the EU.

1.20 "FDA" means the U.S. Food and Drug Administration or any successor
entity thereto.

1.21 "Finished Product" means the Product packaged and labeled for sale in
accordance with applicable laws and regulations in the Territories.

1.22 "International Promotional Materials" means all electronic and computer
managed information (including the Internet), all written, printed or graphic
materials, brochures, sales aids and other promotional items relating to a
Product approved for use in the International Territory, including but not
limited to advertising, Continuing Medical Education programs, seminar
presentations, symposia and speaker programs.

1.23 "International Territory" means all areas of the world outside the U.S.
Territory.

1.24 "International Transfer Price" means the price for the sale of Product
by SuperGen to Abbott in the International Territory as determined pursuant
to Section 8.2(c).

1.25 "Know-How" means any proprietary technology (other than the Licensed
Patents) owned by or licensed (with a right of sublicense) to SuperGen during
the term of this Agreement relating to the Compound or the Product; including
but not limited to, all pharmacological and toxicological data, including
animal test results and human clinical data and evaluation reports, and all
performance specifications.

1.26 "Launch" means the date upon which the first commercial sale of a
Product by Abbott or its Affiliates to Third Parties (as evidenced by the
invoice date for such sale) occurs in the Territories.

1.27 "Licensed Patents" means all patents and patent applications set forth
in Exhibit 1.23 throughout the Territory, including without limitation
substitutions,


                                                                             5
<PAGE>

extensions, additions, reissues, reexaminations, renewals, divisions,
continuations, continuations-in-part or supplementary patent certificates
thereof or therefor, owned by or licensed (with the right to sublicense) to
SuperGen during the term of this Agreement relating to the Compound and/ or
the Product.

1.28 "Losses" means any liabilities, costs, damages, judgments, settlements
and other reasonable out-of-pocket expenses (including legal and other
professional fees and expenses).

1.29 "Major European Countries" means France, Italy, Germany, Spain and the
United Kingdom.

1.30 "Marketing Studies" means those clinical trials and studies (including,
for the purposes of this Agreement, physician-held IND studies) which are
performed essentially for marketing purposes and expressly excludes all
clinical studies and trials which are required to pursue, obtain, and
maintain Regulatory Approval in the Territories.

1.31 "Medicare/ Medicaid Rebates" means those rebates that are due to either
U.S. federal or state administered programs on purchases of the Product by
such programs as established by applicable U.S. federal or state law or
regulation.

1.32 "NDA" means, with respect to each commercially launched Product, an
approvable New Drug Application filed by SuperGen with the FDA for the U.S.
Territory, and the equivalent regulatory submission with the applicable
governmental authorities in the European Union and/ or in a given country in
the International Territory, and all subsequent submissions to that NDA.

1.33 "Net Units of Product Sold" means the total number of units of Product
which are sold by Abbott or its Affiliates to Third Parties during the given
calendar quarter or year less any returned, recalled, damaged or any other
such units of Product for which the customer has been credited the original
sales price. For any given period, the Net Units of Product Sold shall equal
that number of units of Product included in the calculation of Abbott Net
Sales for the same period. The Net Units of Product Sold shall be calculated
separately for the U.S. Territory and the International Territory.

1.34 "Party" means Abbott or SuperGen, and "Parties" means Abbott and
SuperGen, except as provided in Section 20.2.

1.35 "Patent Protected" means, with respect to the Product in a specific
country of the Territories, that the manufacture, use or sale of such Product
in such country infringes a Valid Claim in such country.

1.36 "Person" means a natural person, a corporation, a partnership, a trust
venture, any governmental authority, and any other entity or organization.

1.37 "Product" means any pharmaceutical product containing the Compound or a


                                                                             6
<PAGE>

derivative thereof as an active ingredient.

1.38 "Product Sales" means the total gross sales of the Product.

1.39 "Promote" or "Promotion" means the act of Detailing or otherwise
advertising, marketing and promoting sales of the Product and conducting as
necessary Marketing Studies.

1.40 "Regulatory Approval" means (i) with respect to the U.S. Territory,
approval from the FDA to market a Product in the United States and (ii) with
respect to the International Territory, all governmental approvals and
authorizations necessary for the commercial sale of the Product in a country
in the Territory, including but not limited to marketing authorization,
pricing approval and pricing reimbursement, as applicable.

1.41 "Sales Representative" means, with respect to each Party, an individual:
(i) who is regularly employed by such Party on a full-time or part-time basis
as a member of one of its sales forces or as a field-based medical liaison
representative or, with the written consent of the other Party, is retained
on a contractual basis to act as a part of its sales force; and (ii) who is
appropriately qualified and experienced in pharmaceutical product promotion
to make effective sales presentations for the Product.

1.42 "Sales Year" means, for both the U.S. Territory and the International
Territory, for the first Sales Year, a twelve (12) month period commencing on
the date of Abbott's Launch of the Product in such Territory, or any
succeeding twelve (12) month period.

1.43 "Sample Pack" means Product for distribution to Third Parties as
professional samples not to be sold.

1.44 "Specifications" means written manufacturing release specifications,
which shall be agreed between the Parties for, respectively, the Compound,
the Product and the Finished Product, and attached to this Agreement as
Exhibit 1.44.

1.45 "SuperGen Cost of Goods" means the [________________________] during the
given calendar quarter or year, [________________________] during the given
calendar quarter or year for (i) the [________________________]; (ii) any
[________________________]; and (iii) [________________________]; and (iv) any
[________________________]. The SuperGen

                                                                             7
<PAGE>

Cost of Goods shall be calculated separately for the U.S. Territory and the
International Territory.

1.46 "SuperGen Distribution Margin" means the [________________________] for
a given calendar quarter or year. The SuperGen Distribution Margin shall be
calculated only for the U.S. Territory.

1.47 "SuperGen Operating Margin" means the [________________________] for a
given calendar quarter or year. The SuperGen Operating Margin shall be
calculated only for the U.S. Territory.

1.48 "SuperGen Product Sales" means the total aggregate
[________________________] in the U.S. Territory during a given calendar
quarter or year. The SuperGen Product Sales shall be calculated only for the
U.S. Territory.

1.49 "SuperGen SG&A" means, with respect to the U.S. Territory during the
given calendar quarter or year, the [________________________] in the
advertising, Detailing, sales, marketing and promotion of the Product in the
U.S. Territory and, to the extent permitted under Section 4.4, the
[________________________] for the U.S. Territory for the Product during the
given calendar quarter or year, in the categories set forth in Exhibit 1.8,
provided that in no event shall SuperGen SG&A include any
[________________________]. The SuperGen SG&A shall be calculated only for
the U.S. Territory.

1.50 "SuperGen Technology" means the Licensed Patents and the Know-How.

1.51 "SuperGen Third Party Royalties" means the royalty payments made, for a
given period during the term of this Agreement, by SuperGen to
[________________________].

1.52 "SuperGen Trademark" means the trademark to be selected by the U.S.
Marketing Board and registered by SuperGen for the Product in the U.S.
Territory.

1.53 "Territories" means the U.S. Territory and the International Territory.

1.54 "Third Party" means any Person that is not a Party or an Affiliate of a
Party.


                                                                             8
<PAGE>

1.55 "U.S. Product Profit" means the following: (i) with respect to the first
calendar quarter of each year, the total of the [________________________]
for such calendar quarter and (ii) for the second, third and fourth calendar
quarters of each year, the total, for the subject calendar quarter and each
previous calendar quarter during such calendar year, of the
[________________________].

1.56 "U.S. Promotional Materials" means all electronic and computer managed
information (including the Internet), all written, printed or graphic
materials, brochures, sales aids and other promotional items relating to a
Product approved by the U.S. Marketing Board for use in the U.S. Territory,
including but not limited to advertising, Continuing Medical Education
programs, audio programs, seminar presentations, symposia and speaker
programs.

1.57 "U.S. Territory" means the continental United States of America, Hawaii
and Alaska.

1.58 "U.S. Transfer Price" means the price for the sale of the Product by
SuperGen to Abbott in the U.S. Territory pursuant to Section 8.2(b) below.

1.59 "Valid Claim" means (a) an issued claim of any unexpired patent included
among the Licensed Patents, or (b) a pending claim of any pending patent
application included among the Licensed Patents, which has not been held
unenforceable, unpatentable or invalid by a decision of a court or
governmental body of competent jurisdiction, unappealable or unappealed
within the time allowed for appeal, which has not been rendered unenforceable
through disclaimer or otherwise or which has not been lost through an
interference proceeding.

ARTICLE 2:       DISTRIBUTION AND PROMOTION

2.1  EXCLUSIVE DISTRIBUTOR. SuperGen hereby appoints Abbott, and Abbott
hereby accepts appointment, as the exclusive distributor of the Product in
the U.S. Territory and the International Territory, with the sole and
exclusive right, exclusive even as to SuperGen, to sell commercially and to
distribute the Product to Third Parties in the Territories, with the right to
appoint Affiliate sub-distributors, and with the right to appoint Third Party
sub-distributors with SuperGen's prior written consent, which consent shall
not be unreasonably withheld or delayed.

2.2  RESERVATION OF RIGHTS. Except as expressly provided in this Article 2
     and elsewhere in this Agreement, no right, title or interest is granted,
     whether express or implied, by SuperGen to Abbott relating to other
     SuperGen products. Nothing in this Agreement shall be deemed to restrict
     SuperGen's right to exploit technology, know-how, patents or any other
     intellectual property rights relating to other SuperGen products.

2.3  PROMOTION.

                                                                             9
<PAGE>

     (a)   SuperGen hereby grants to Abbott, and Abbott hereby accepts, the
     exclusive right to Co-Promote the Product in the U.S. Territory jointly
     with SuperGen. Neither Abbott nor SuperGen shall appoint any Third Party
     to act on its behalf with respect to the Detailing of the Product in the
     U.S. Territory. At any time during the term of this Agreement, if
     SuperGen (or its successors or permitted assigns), at its sole
     discretion, decides not to Co-Promote or to cease Co-Promoting the
     Product in the U.S. Territory, SuperGen shall provide Abbott with at
     least one hundred eighty (180) days prior written notice of such
     decision. In such event, Abbott's right to Co-Promote the Product in the
     U.S. Territory pursuant to this Article 2.3 shall automatically become
     an exclusive right to Promote the Product in the U.S. Territory,
     exclusive even as to SuperGen, without requiring any amendment of this
     Agreement, effective one hundred eighty (180) days after receipt of such
     notice from SuperGen.

     (b)   SuperGen hereby grants to Abbott, and Abbott hereby accepts, the
     exclusive right, exclusive even as to SuperGen, to Promote the Product
     in the International Territory, with the right to appoint Third Parties
     to Co-Promote the Product in the International Territory.

2.4  NON-COMPETE. During the term of this Agreement, the Parties shall not
     market, offer for sale or sell a Competing Product within the
     Territories.

2.5  LICENSE.

     (a)   SuperGen hereby grants Abbott an exclusive license under the
     SuperGen Technology to offer to sell and sell the Product in the U.S.
     Territory, with the right to sub-license to Affiliates, and with the
     right to sub-license to Third Parties with SuperGen's prior written
     consent, such consent not to be unreasonably withheld or delayed. Such
     license shall be exclusive even as to SuperGen, except to the extent
     necessary to enable SuperGen to perform any obligations or activities
     that SuperGen is required or permitted to perform under this Agreement.

     (b)   SuperGen hereby grants Abbott an exclusive license under the
     SuperGen Technology to import, use, offer to sell and sell the Product
     in the International Territory, with the right to sublicense. Such
     license shall be exclusive even as to SuperGen, except to the extent
     necessary to enable SuperGen to perform any obligations or activities
     that SuperGen is required or permitted to perform under this Agreement.

     (c)   Solely for the purpose of enabling Abbott to exercise its rights
     pursuant to Article 8.5 of this Agreement, SuperGen hereby grants Abbott
     a non-exclusive license to make and have made the Product in the
     Territories.

     (d)   If at any time during the term of this Agreement, the financial
     resources of SuperGen are not reasonably sufficient to enable it to
     continue to meet its


                                                                            10
<PAGE>

     obligations hereunder for at least the next six months, SuperGen will so
     notify Abbott and the parties will meet to review and consider steps
     that might be taken to preserve Abbott's rights to the SuperGen
     Technology under the terms of the Agreement.

2.6  RIGHTS TO ADDITIONAL PRODUCTS.

     (a)   SuperGen hereby grants to Abbott, and Abbott hereby accepts, a
     right of first discussion with respect to all pharmaceutical compounds,
     other than the Compound, which are licensed to, owned by and/ or
     developed by SuperGen (regardless of their stage of development) as
     provided herein. If SuperGen desires to sell, or grant any rights
     relating to, any such compound, SuperGen shall first
     [________________________].

     (b)   [________________________].

     (c)   [________________________].

     (d)   [________________________].

2.7  RIGHT OF FIRST REFUSAL FOR SUPERGEN ACQUISITION.

     (a)   In the event that SuperGen wishes to initiate an inquiry or
     solicit an offer, or receives an offer or inquiry, from any Third Party
     relating to the potential


                                                                            11
<PAGE>

     merger with or acquisition of SuperGen or of a controlling portion of
     the voting securities or substantially all of assets of SuperGen,
     SuperGen shall first so notify Abbott ("Acquisition Offer Notice") and
     Abbott shall have the right of first refusal to merge with or acquire
     SuperGen or a controlling portion of the voting securities or
     substantially all of assets of SuperGen.

     (b)   The Acquisition Offer Notice shall set forth the principal
     financial and other terms under consideration by SuperGen. Abbott shall
     have ninety (90) days from receipt of the Acquisition Offer Notice to
     respond with either an offer to merger with or acquire SuperGen, or a
     notice that Abbott is not interested in making any offer to merge with
     or acquire SuperGen. If Abbott makes an offer to merge with or acquire
     SuperGen, the Parties shall enter into good faith negotiations for such
     merger or acquisition, and shall enter into a definitive agreement or
     agreements in order to effect such merger or acquisition subject to the
     terms and conditions of such definitive agreement or agreements. If the
     Parties are unable to reach agreement and to enter into such definitive
     agreement or agreements within ninety (90) days of the start of
     negotiations, then SuperGen shall be free to initiate an inquiry or
     solicit an offer, or to entertain an offer or inquiry, from any Third
     Party relating to the potential merger with or acquisition of SuperGen
     or of a controlling portion of the voting securities or substantially
     all of assets of SuperGen; provided that SuperGen shall not enter into
     any definitive agreement or agreements with any such Third Party, on
     terms and conditions equivalent to or more favorable to such Third Party
     than the terms and conditions last offered to Abbott by SuperGen,
     without first offering to enter into the definitive agreement or
     agreements with Abbott.

     (c)   Notwithstanding any other provision of this Section 2.7, if the
     SuperGen Board of Directors determines in good faith that accepting an
     offer from Abbott to acquire SuperGen pursuant to this Section 2.7(a) or
     (b) would not meet the Board's fiduciary duties under applicable laws
     and regulations, then SuperGen's non-compliance with this Section 2.7(a)
     or (b) shall not constitute a breach of this Agreement.

ARTICLE 3:        CLINICAL DEVELOPMENT, PRODUCT APPROVAL AND LAUNCH

3.1  CLINICAL DEVELOPMENT

     (a)   SuperGen shall exercise its reasonable efforts to pursue, and
     shall bear the full cost and expense of, the Clinical Development of the
     Product to support Regulatory Approval for the treatment of pancreatic
     cancer for the U.S. Territory, Canada, and those countries in the
     International Territory which are, as of the Effective Date, member
     states of the European Union ("EU"). For purposes of this Agreement,
     "Clinical Development" includes but is not limited to all clinical
     studies and trials, and all safety, toxicology, efficacy, and other data
     required to pursue, obtain and maintain Regulatory Approval in the U.S.
     Territory, in Canada, and in the EU, as well as the clinical studies set
     forth in Exhibit 3.1 attached to


                                                                            12
<PAGE>

     this Agreement. In performing its obligations under this Article 3.1(a),
     SuperGen shall act in accordance with Article 4.4 below, and in so doing
     SuperGen shall keep Abbott fully apprised with respect to its clinical
     development activities and shall provide Abbott with reasonable advance
     opportunity for input regarding these activities, including the right to
     review and approve the protocols and SuperGen's audit reports relating
     to all clinical studies.

     (b)   Abbott shall exercise its reasonable efforts to pursue, and shall
     bear the full cost and expense of the clinical development of the
     Product for the countries of the International Territory other than
     Canada and the EU. Abbott shall keep SuperGen fully apprised with
     respect to its clinical development activities and shall provide
     SuperGen with reasonable advance opportunity for input regarding these
     activities, including the right to review the protocols and Abbott audit
     reports relating to all clinical studies.

3.2  U.S. REGULATORY APPROVAL. SuperGen shall exercise its reasonable efforts
to file, obtain and maintain Regulatory Approval for the Product in the
United States, and to obtain reimbursement approval for the Product in the
United States (including but not limited to any and all applicable programs
administered by government and private third-Party payors), and shall bear
the full cost and expense thereof. SuperGen shall keep Abbott fully apprised
with respect to its regulatory and reimbursement activity in the United
States. Specifically, SuperGen shall (i) promptly provide Abbott with a copy
of all filings, documents, and material correspondence with the FDA and other
applicable regulatory or governmental authorities and any inspection reports
relating to Third Party manufacturers, (ii) provide Abbott with advance
notice of meetings with the FDA and allow Abbott to attend or participate in
any such meeting, (iii) allow Abbott representatives opportunity to audit any
and all manufacturing facilities, processes, clinical sites, and
documentation for the Product; and (iv) provide Abbott with a written right
of reference to all U.S. regulatory filings.

3.3  INTERNATIONAL REGULATORY APPROVAL.

     (a) SuperGen shall provide Abbott, at SuperGen's expense, with the
     dossier SuperGen uses for obtaining U.S. Regulatory Approval, along with
     any and all other data, information and materials reasonably requested
     by Abbott for obtaining Regulatory Approval from the EMEA for the
     Product. Abbott shall exercise its reasonable efforts to file, obtain
     and maintain Regulatory Approval for the Products in the International
     Territory, and shall bear the full cost and expense thereof, provided
     that if the EMEA requests or requires additional clinical data beyond
     that provided to Abbott by SuperGen, or Abbott in its reasonable
     commercial judgement deems such additional clinical data to be necessary
     for such Regulatory Approval, then SuperGen shall reimburse Abbott for
     Abbott's costs and expenses for such additional clinical studies. Abbott
     shall keep SuperGen fully apprised with respect to its regulatory
     activity in the International Territory. Specifically, Abbott shall (i)
     promptly provide SuperGen with a copy of all filings, documents, and
     material correspondence with the


                                                                            13
<PAGE>

     relevant governmental authorities (without an obligation to translate
     into English, unless otherwise available), and (ii) provide SuperGen
     with advance notice of meetings with such authorities and consider, at
     Abbott's sole discretion, SuperGen's request to attend or participate in
     any such meeting or to obtain a written right of reference to Abbott's
     regulatory filings for the Product in the International Territory.

     (b)   Abbott shall use its reasonable efforts to obtain Regulatory
     Approval in [________________________]. If Abbott fails to obtain
     Regulatory Approval pursuant to this Section 3.3(b) within such time
     frame, SuperGen shall have the right to take over Abbott's Regulatory
     Approval efforts in these countries. In such event, Abbott shall
     transfer to SuperGen all of the filing materials or information then in
     Abbott's possession or control necessary for SuperGen to file for the
     Regulatory Approval, or to continue the filing if Abbott has commenced
     the filing process, in these countries.

3.4  REASONABLE COOPERATION.

     (a)   Each Party shall provide the other Party with all reasonable
     assistance requested by the other Party with respect to the foregoing
     clinical development and regulatory activities, including, but not
     limited to, promptly providing the other Party with any and all
     authorizations, approvals, certificates of free sale, and other
     information, documents, materials and assistance reasonably required by
     the other Party to file, obtain, and maintain Regulatory Approval for
     the Product. The Party providing such assistance shall be reimbursed by
     the other Party for its reasonable out-of-pocket costs and expenses.

     (b)   If SuperGen so requests and Abbott so agrees, Abbott shall perform
     certain clinical research services for particular clinical studies to be
     conducted by SuperGen, subject to the terms and conditions of a separate
     agreement between the Parties including, but not limited to, the
     provision for an appropriate fee to be paid Abbott for its services
     thereunder.

     (c)   SuperGen shall provide to Abbott, at SuperGen's expense, the
     dossier SuperGen uses for obtaining U.S. Regulatory Approval, along with
     any and all other data, information and materials reasonably requested
     by Abbott for obtaining Regulatory Approval from the EMEA for the
     Product.

     (d)   In connection with its NDA for the Product in the U.S. Territory,
     and with Abbott's NDAs for the Product in the International Territory,
     SuperGen shall take any and all actions necessary or reasonably
     requested by Abbott in order to qualify Abbott as a secondary
     manufacturing source for the Product in the Territories, solely for the
     purpose of enabling Abbott to exercise its rights pursuant to Article
     8.5 below without delay or impediment in the supply of


                                                                            14
<PAGE>

     Product to Abbott for Sale in the Territories.

     (e)   Within four (4) months of the Effective Date, the respective
     pharmacovigilance groups of each Party shall prepare and enter into a
     separate agreement relating to the exchange of adverse event information.

3.5  EXCUSED PERFORMANCE. The Parties acknowledge and understand that the
development, obtaining of Regulatory Approval, and marketing of the Product,
as with any pharmaceutical product, is subject to certain inherent risks
including that (a) the Product will be ineffective, toxic, or will not
receive Regulatory Approval, or will receive Regulatory Approval but with
labeling which the Parties agree is insufficient to render the Product
commercially viable; (b) the Product will be too expensive to manufacture or
market or will not achieve broad market acceptance; (c) Third Parties will
hold proprietary rights that will preclude the marketing and sale of the
Product; or (d) Third Parties will market equivalent or superior products.
Neither Party makes any representation or warranty that the Product (i) will
be successfully developed; (ii) will receive all necessary and/ or
commercially viable Regulatory Approvals, (iii) will be Launched; or (iv)
will be commercially successful. The respective obligations of the Parties
under this Article 3, and Articles 4 and 5 below, are expressly conditioned
upon the safety, efficacy and commercial feasibility of the Product, and,
except as expressly provided herein, a Party's obligation hereunder shall be
delayed or suspended for so long as any condition or event exists which
reasonably causes a Party to question the safety, efficacy or commercial
feasibility of the Product. Furthermore, Abbott's obligation to market and
Promote the Product in a given country in the International Territory shall
not apply if Abbott has not commenced or has ceased marketing the Product in
such country substantially due to adverse business or financial conditions,
including those caused by the regulatory authorities or other governmental
authorities of such country, which would cause the marketing of such Product
in such country to be contrary to the financial best interest of the Parties.
Each Party shall promptly notify the other Party in the event any material
issue arises as to the safety, efficacy, commercial feasibility, or adverse
business or financial conditions with respect to any Product.

3.6  ABBOTT SUPPORT OF DEVELOPMENT EFFORTS. Abbott shall staff incremental
headcount in support of the clinical, regulatory and CMC obligations set
forth in this Agreement. [________________________]

3.7  SUPERGEN DEVELOPMENT EFFORTS. SuperGen shall ensure that the development
activities it undertakes pursuant to Article 3 and Article 4 hereof shall be
carried out in accordance with Current Good Clinical Practice, Current Good
Laboratory Practice and Current Good Manufacturing Practice.


                                                                            15
<PAGE>

3.8  GOOD CLINICAL PRACTICE AUDITS. The parties shall appoint a mutually
acceptable third party independent clinical research organization to conduct
a Current Good Clinical Practice audit of the clinical development activities
set forth herein in each of [________________________] and
[________________________] (each, a "GCP Audit"). The costs of both GCP
Audits shall be borne by SuperGen. If either GCP Audit reveals a material
deficiency which Abbott concludes, in its sole discretion, may jeopardize the
success of the U.S. NDA filing for the Product, and if SuperGen does not
rectify such deficiency to Abbott's reasonable satisfaction within sixty (60)
days of Abbott's notice of such deficiency, then Abbott shall thereafter
[________________________].

3.9  ABBOTT OPTION. SuperGen shall have ninety (90) days from completion of
the Phase III pancreatic cancer clinical studies with the Product to
determine whether the results of such studies are sufficient to support an
NDA filing for the Product in the United States. In the event that SuperGen
determines that such results are insufficient to support such a filing and
[________________________].

3.10 ABBOTT ACCESS TO DATA. Promptly after the Effective Date and throughout
the term of this Agreement, SuperGen shall provide to Abbott, within a
reasonable time, a shared database so that Abbott shall have ready access to
all preclinical and clinical and manufacturing documentation, information and
data resulting from SuperGen's Product research and development activities in
the Territories which Abbott requires for


                                                                            16
<PAGE>

regulatory filings in the Territories or which Abbott may reasonably request,
including but not limited to the studies set forth in Exhibit 3.1, case
report forms, monitoring documents, patient informed consents, institutional
review board approvals, medical and statistical programming and study reports
for individual studies, clinical data summaries, and expert reports. Upon
Abbott's request, SuperGen shall provide Abbott with copies of such
documentation and data. If at any time during this Agreement SuperGen fails
to provide Abbott with such database (including but not limited to any
updates thereof) or any such access in a reasonable timely fashion, and if
SuperGen does not provide such database and/or access to Abbott within sixty
(60) days of Abbott's notice to SuperGen of such failure, then Abbott shall
have the option to thereafter [________________________].

ARTICLE 4:       CO-PROMOTION AND PROMOTION

4.1  MARKETING EFFORT. Abbott and SuperGen shall use their reasonable efforts
to Co-Promote the Product in the U.S. Territory, and Abbott shall use its
reasonable efforts to Promote the Product in the International Territory, to
maximize Product Sales in the Territories. Abbott shall use its reasonable
efforts to implement, and shall make tactical decisions with regard to,
Promotion in the International Territory, consistent with the terms of this
Agreement.

4.2  U.S. MARKETING BOARD.

     (a)   Abbott and SuperGen shall work together to Co-Promote the Product
     in the U.S. Territory and shall present their views on the Co-Promotion
     of the Product through a committee (the "U.S. Marketing Board") which
     shall oversee and direct the Co-Promotion of the Product in the U.S.
     Territory. The U.S. Marketing Board shall review and approve strategies
     for the Co-Promotion of the Product, develop and approve the annual
     Co-Promotion budget, and undertake the activities necessary to implement
     those strategies in accordance with a U.S. Co-Promotion Plan and U.S.
     Promotional Materials (including by coordinating the Parties' Detailing
     messages and methodologies, physician, trade, managed care and formulary
     committee targeting, and call programs and efforts).

           (i)   The U.S. Marketing Board shall consist of no more than
            -------------------------------------------------------------
           [_____] individuals, [____] of which shall be representatives,
           respectively, from

                                                                            17
<PAGE>


           Abbott and SuperGen, and shall be chaired alternatively on an
           annual basis by one (1) of the SuperGen representatives and by one
           (1) of the Abbott representatives. Each Party's representatives on
           the U.S. Marketing Board shall be full-time employees of such
           Party and each shall have one (1) vote on any matter arising for
           decision by the Board. The U.S. Marketing Board may invite, from
           time to time, one or more additional employees of the Parties who
           offer specialized assistance to the Board (e.g., legal, finance or
           regulatory personnel) to participate in any meeting in a
           non-voting, advisory capacity, provided that, when one or more
           specialists from one Party is invited, the same number of similar
           specialists from the other Party shall also be invited to the same
           meeting. Each Party shall have the right, at any time, to
           designate by written notice to the other Party, a replacement, on
           a permanent or temporary basis, for any of such Party's members on
           the U.S. Marketing Board.

           (ii)  The U.S. Marketing Board shall be responsible for making all
           final decisions related to the Co-Promotion of the Product in the
           U.S. Territory, pursuant to the terms and conditions of this
           Agreement. Each Party shall use its reasonable efforts to
           implement the final decisions of the U.S. Marketing Board.

           (iii) The U.S. Marketing Board shall endeavor to work by
           consensus. In the event of a deadlock in any vote or on any issue
           relating to this Section 4.2, the Parties shall
           [________________________].

           (iv)  During the first three (3) Sales Years in the U.S.
           Territory, the U.S. Marketing Board shall meet as necessary, in
           person or otherwise as the Parties shall agree, but no less than
           once per calendar quarter. Thereafter, for the remaining term of
           this Agreement, the Board shall meet as necessary, in person or
           otherwise as the Parties shall agree. The chairperson shall be
           responsible for scheduling and arranging such meetings and
           ensuring that all [____] members or their designated
           replacements are able to attend

           (v)   Each Party shall bear its own costs, including travel costs,
           for its representatives on the U.S. Marketing Board or its
           specialists attending any meeting of the U.S. Marketing Board.

                                                                            18
<PAGE>


     (b)   No later than [________________________] of each year during the
     term of this Agreement, the Parties shall reach written agreement,
     through the U.S. Marketing Board, on an annual budget for the
     Co-Promotion of the Product in the U.S. Territory (the "U.S.
     Co-Promotion Budget"), which shall set forth in appropriate detail, the
     costs and expenses to be incurred pursuant to Section 1.8(i) (Abbott
     SG&A) and Section 1.55(i) (SuperGen SG&A) and as further described in
     Exhibit 1.8; provided that if, in the proposed budget for a given year
     exceeds [________________________], then that budget must be approved by
     both the U.S. Marketing Board and SuperGen's Executive Vice President of
     Commercial Operations and Abbott's Hospital Products Division Vice
     President of Commercial Operations. The initial U.S. Co-Promotion Budget
     shall be approved within sixty (60) days of the Effective Date and such
     initial U.S. Co-Promotion Budget shall [________________________]. The
     U.S. Co-Promotion Budget shall be expended consistent with the
     strategies outlined in the U.S. Co-Promotion Plan, allowing for
     management discretion of the respective Parties in the implementation of
     specific tactical components, provided that Abbott's obligation to make
     any expenditure for U.S. Co-Promotion until the date of the acceptance
     by the FDA of the U.S. NDA for the Product. The U.S. Marketing Board may
     recommend adjustments to an approved U.S. Co-Promotion Budget up to
     [____] times per calendar year, for review and approval by SuperGen's
     Executive Vice President of Commercial Operations and Abbott's Hospital
     Products Division Vice President of Commercial Operations, according to
     the following time-table:

          U.S. MARKETING BOARD RECOMMENDS             PARTIES APPROVE IN WRITING
              [________________________]              [________________________]
              [________________________]              [________________________]


     (c)   No later than [_______________] of each year during the term of
     this Agreement, the Parties shall reach written agreement, through the
     U.S. Marketing Board, on an annual plan for the Co-Promotion of the
     Product in the U.S. Territory (the "U.S. Co-Promotion Plan"). The U.S.
     Marketing Board shall oversee the implementation of the U.S.
     Co-Promotion Plan. The U.S. Co-Promotion Plan shall specify the number
     of the total Sales Representatives required (measured on a full time
     equivalent basis) and define the activities of such Sales
     Representatives which are included in such Party's SG&A account
     hereunder (the "Detailing Commitment"), the sampling program for the
     Product (including a maximum number of Sample Packs), the Discretionary
     Funds available to the Sales Representatives, any Marketing Studies for
     the Product, medical education programs and special marketing incentive
     programs; provided, however, that, unless expressly agreed otherwise by
     the Parties, the Abbott Sales Representatives and the SuperGen Sales
     Representatives shall be treated in a like and equal manner such that:
     (i) the sampling program (as well as the number of samples) per Sales
     Representative shall be substantially the same for both sales

                                                                            19

<PAGE>

     forces; (ii) the level of Discretionary Funds per Sales Representative
     shall be substantially the same for both Parties; and (iii) the amount
     and type of U.S. Promotional Materials per Sales Representative shall be
     substantially the same for both sales forces.

     (d)   Under the U.S. Co-Promotion Budget and the U.S. Co-Promotion Plan,
     Abbott shall maintain no less than [_____________] of the total
     number of Sales Representatives required to Co-Promote the Product, and
     SuperGen shall be permitted to maintain up to [_________________] of
     such total number of Sales Representatives.

     (e)   Abbott and SuperGen shall be authorized to account for such Sales
     Representatives, on a fully allocated cost of [________________________]
     per full-time equivalent basis, as part of the Abbott SG&A and SuperGen
     SG&A, respectively (for example, two Sales Representatives who are
     full-time employees and are assigned to dedicate 50% of their time to
     the Product shall be counted as one full-time equivalent at a cost of
     [_________________]). The cost of [________________________] per
     full-time equivalent shall be increased no more than once per calendar
     year based upon the U.S. Consumer Price Index.

     (f)   Each Party shall be responsible for staffing, selling skills
     training, supervising, and compensating (including incentives) its own
     Sales Representatives. The Parties shall jointly develop, review and
     agree upon Product-specific training materials, and shall use the same
     such training materials, for their respective Sales Representatives. The
     Parties shall conduct Product training for their respective Sales
     Representatives jointly, at such times and in such manner as set forth
     in the U.S. Co-Promotion Plan. Each Party shall have full control over
     and be responsible for the salary, incentives, benefits and other
     employment matters related to its Sales Representatives.

     (g)   Each Party shall use its reasonable efforts to perform those tasks
     and responsibilities assigned to such Party in the U.S. Co-Promotion
     Plan. The Detailing of a Product shall commence upon the Launch of such
     Product. Each Party may perform Details throughout the U.S. Territory.
     The U.S. Marketing Board shall coordinate the Parties' Detailing
     activities so as to maximize Product sales by, for example, maximizing
     geographic coverage, eliminating unnecessary duplication, identifying
     promising managed care targets, enhancing managed care penetration, and
     optimizing participation in conventions continuing educational programs
     for health care professionals.

     (h)   As part of the Co-Promotion of the Product in the U.S. Territory,
     each Party may distribute a reasonable number of Sample Packs free of
     charge to health care professionals on an ongoing basis in accordance
     with the sampling program as outlined in the U.S. Co-Promotion Plan and
     approved by the U.S. Marketing Board. Each Party shall comply with all
     applicable laws and

                                                                            20
<PAGE>


     regulations with respect to the distribution of Sample Packs in the U.S.
     Territory, including but not limited to maintaining all records required
     pursuant to the Prescription Drug Marketing Act of 1987. Abbott shall
     promptly report to SuperGen any thefts of Sample Packs or any losses of
     Sample Packs. SuperGen shall be responsible for providing to both
     Parties' sales forces the quantities of Sample Packs set forth in the
     U.S. Co-Promotion Plan.

     (i)   SuperGen and Abbott shall jointly develop, review and agree upon
     the U.S. Promotional Materials from a regulatory and medical
     perspective. To the extent that any U.S. Promotional Materials are
     required by law or regulation to be submitted to the FDA, SuperGen shall
     make such submissions; and SuperGen shall be the FDA liaison for both
     Parties on all marketing issues. The Parties shall disseminate in the
     U.S. Territory only those promotional and advertising materials which
     have been approved for use by the U.S. Marketing Board. Neither Party
     shall be required to use U.S. Promotional Materials which are prohibited
     under applicable FDA regulations or other applicable laws and
     regulations, or which have not been approved in writing by that Party's
     responsible regulatory and medical departments. Abbott and SuperGen
     shall use the same U.S. Promotional Materials in connection with the
     Co-Promotion of the Product.

     (j)   Each Party shall cause its sales force, and all other employees
     and approved agents and representatives, to comply with all applicable
     laws and regulations in connection with the Co-Promotion of the Product
     in the U.S. Territory, including but not limited to applicable FDA
     regulations, the Prescription Drug Marketing Act and the Federal
     Anti-Kickback Statutes. Each Party shall cause its sales force (A) to
     Co-Promote the Product consistently with the U.S. Marketing Board's then
     approved U.S. Promotional Materials and U.S. Co-Promotion Plan, and (B)
     not to do anything knowingly or recklessly which will jeopardize the
     goodwill or reputation of the Product or the other Party. In addition,
     each Party shall exercise its reasonable efforts to conduct the
     Co-Promotion of the Product in adherence to the American Medical
     Association Gifts to Physicians From Industry Guidelines.

     (k)   In addition to the Co-Promotion activities covered under this
     Agreement, the U.S. Marketing Board may establish and operate an
     indigent program for distribution of the Product and/or Sample Packs to
     needy individuals and/or the physicians and other providers serving such
     needy individuals, and an expanded access program.
     [__________________________], as the case may be. SuperGen shall provide
     for reasonable telephone support services for reimbursement under this
     program during normal business hours.

     (l)   Notwithstanding anything in this Agreement to the contrary, if at
     any time during the term of this Agreement SuperGen notifies Abbott of
     its decision not to Promote or to cease to Promote the Product in the
     U.S. Territory, then the  [___]


                                                                            21
<PAGE>

      [__________________________].


4.3  INTERNATIONAL TERRITORY. Abbott shall use its reasonable efforts, to the
extent possible, to coordinate its promotional activities and methods in the
International Territory with those used by the Parties in the U.S. Territory.
Abbott shall cause its sales force, and all other employees and approved
agents and representatives, to comply with all applicable laws and
regulations in connection with the Promotion of the Product in the
International Territory.

4.4  CLINICAL DEVELOPMENT COMMITTEE.

     (a)   The Parties shall form a Clinical Development Committee which
           shall:

           (i)   oversee the implementation of (1) the clinical studies as
                 set forth in Exhibit 3.1 and (2) the pursuit of Regulatory
                 Approval in the U.S. Territory including but not limited to
                 the preparation and filing of the U.S. NDA;

           (ii)  be responsible for developing further clinical strategies for
                 the Product in the U.S. Territory and in the EU; and

           (iii)  [__________________________].

     (b)   The Clinical Development Committee shall consist of no more than
           [_______] total members,  [________] representatives each from
           Abbott and SuperGen, and shall be chaired alternatively on an
           annual basis by one (1) of the SuperGen representatives and by one
           (1) of the Abbott representatives. It shall follow the rules
           established by Section 4.2(a)(i) through (v) for the U.S.
           Marketing Board, except that:

           (i)   final decisions with respect to clinical development and
                 regulatory strategy for the Product in the U.S. Territory
                 (including but not limited to, for example,
                 [__________________________]) and for clinical

                                                                            22
<PAGE>


                 development in the EU shall be made by the Clinical
                 Development Committee;

           (ii)  final decisions with respect to Marketing Studies intended
                 for use solely within the U.S. Territory shall be made by
                 the U.S. Marketing Board, and by Abbott with respect to
                 Marketing Studies intended for use solely within the
                 International Territory, irrespective of the country or
                 countries in which such Marketing Studies are conducted;

           (iii) final decisions with respect to clinical development for the
                 Product in the International Territory outside the EU, and
                 for clinical development and regulatory strategy for the
                 Product in the International Territory, shall be made by
                 Abbott; and

           (iv)  The Clinical Development Committee shall endeavor to work by
                 consensus. In the event of a deadlock in any vote or on any
                 issue relating to this Section 4.4 on which the Clinical
                 Development Committee is to make a final decision, the
                 Parties shall [__________________________].

     (c)   The cost of any clinical study to support Regulatory Approval for
           the Product in the U.S., the EU and Canada (beyond those which are
           SuperGen's responsibility pursuant to Section 3.1 above)
           undertaken by a Party or by the Parties shall be approved in
           advance by the Clinical Development Committee and shall be
           [__________________________]. The Parties shall use their
           reasonable efforts, working through the Clinical Development
           Committee, to coordinate Marketing Study strategies and the
           implementation of such strategies so as to maximize the benefit of
           Marketing Studies to the Product worldwide and to avoid
           duplication or conflict in such Marketing Studies.

     (d)   At any time during the term of this Agreement, whether through the
           Clinical Development Committee or otherwise, if SuperGen develops
           or SuperGen and Abbott jointly develop any improvements,
           modifications, enhancements, additions to or extensions of the
           Product (an "Improvement"), such Improvement shall be deemed to be
           a Product under this Agreement. The Parties shall
           [__________________________] such Improvement for


                                                                            23
<PAGE>

           Co-Promotion by SuperGen and Abbott in the U.S. Territory and for
           Promotion by Abbott in the International Territory pursuant to a
           development plan and budget to be agreed between the Parties. For
           purposes of clarification, the Parties agree that
           [__________________________] with respect to any such Improvement,
           but that the  [__________________________] to such Improvement(s).
           Notwithstanding anything to the contrary in this Agreement, if
           both Parties agree in writing to do so, then
           [__________________________].

     (e)   The Clinical Development Committee shall in good faith agree upon
           and complete a development plan for the activities required to
           achieve Regulatory Approvals of the Product in the U.S., the EU
           and Canada (the "Development Plan") within ninety (90) days after
           the Effective Date. The Development Plan shall include, but not be
           limited to, the activities set forth on Exhibit 4.4(e). It is the
           intent of the Parties that  [__________________________] will be
           done to EMEA and U.S. standards and with EMEA and U.S. FDA
           acceptable endpoints.

4.5  NAMES. While the configuration and placement of the Abbott name and the
SuperGen name shall be decided by the U.S. Marketing Board in the U.S.
Territory and by Abbott for the International Territory, the Parties agree
that Abbott's name and SuperGen's name shall appear and be equally prominent
on all Product, Sample Packs and U.S. Promotional Materials in the U.S.
Territory, to the extent allowed by applicable laws and regulations. The
Product's N.D.C. number shall be in SuperGen's name. The Product will utilize
an Abbott list number in the U.S. Territory.

4.6  RESEARCH AND DEVELOPMENT BUDGET.

     (a)   The Clinical Development Committee shall be responsible for
           reviewing and proposing timelines for research and development
           activities as well as an annual research and development budget
           ("Annual R&D Budget"). The Parties shall prepare general timelines
           and detailed budget estimates for all research and development
           activities as part of the Development Plan. In addition, the
           Development Plan shall also contain the agreed upon Annual
           R&D Budget for 2000.

     (b)   For 2001 and every year of the Development Plan thereafter, the
           Clinical

                                                                            24
<PAGE>

           Development Committee shall prepare an Annual R&D Budget by
           [__________] of the preceding year, which it shall submit to each
           Party for its final review and approval.

     (c)   The Clinical Development Committee may propose adjustments to the
           Annual R&D Budget up to  [_____________] per calendar year, for
           review and approval by SuperGen's Executive Vice President of
           Commercial Operations and Abbott's Hospital Products Division Vice
           President of Commercial Operations, according to the following
           time-table:

                 CDC RECOMMENDS                PARTIES APPROVE IN WRITING
                 --------------                --------------------------
                 [_________________]           [_______________]
                 [_________________]           [_______________]


ARTICLE 5:       MILESTONE PAYMENTS

5.1  R & D PAYMENTS. In consideration of past research and development
performed by SuperGen, Abbott shall make the following milestone payments to
SuperGen, which payments shall be due and payable as set forth below and
within thirty (30) days after the date or event specified. For the purposes
of clarification, the Parties agree that the "first occasion" on which total
annual Product Sales by Abbott in the Territories reaches a specified amount,
as referred to in Articles 5.1(g) through (p) below, shall be deemed to occur
on the last date of the calendar month in which each such amount is reached.

     (a)   Twenty-six million five hundred thousand dollars ($26,500,000)
     worth of equity investment in SuperGen, subject to the terms and
     conditions of the Stock Purchase Agreement, upon the Effective Date.

     (b)   seven million, five hundred thousand dollars ($7,500,000) worth of
     equity investment in SuperGen, subject to the terms and conditions of
     the Stock Purchase Agreement, upon the completion (as defined below)
     [_________________]

                                                                            25
<PAGE>

         [__________________________];

     (c)

           (i)   five million dollars ($5,000,000) worth of equity investment
     in SuperGen, subject to the terms and conditions of the Stock Purchase
     Agreement, upon SuperGen's implementation, to Abbott's reasonable
     satisfaction, of the  [__________________________]:

           (1)    [__________________________] [__________________________];

           (2)    [__________________________] [__________________________];

           (3)    [__________________________] [__________________________];

           (4)    [__________________________] [__________________________];

           (ii)  five million dollars ($5,000,000) worth of equity investment
     in SuperGen, subject to the terms and conditions of the Stock Purchase
     Agreement, upon SuperGen's completion, to Abbott's reasonable
     satisfaction, of the [____________________];

     (d)   two million dollars ($2,000,000) in cash, upon acceptance by the FDA
           of the NDA submitted by SuperGen for the Product;

     (e)   two million dollars ($2,000,000) in cash, upon acceptance by the
           EMEA of the NDA submitted by Abbott for the Product for the EU;

     (f)   two million dollars ($2,000,000) in cash, upon acceptance by the
           competent governmental authority in Japan of the NDA submitted by
           Abbott for the Product for Japan;

     (g)   seven million dollars ($7,000,000) in cash, upon Launch of the
           Product in the U.S. Territory, provided that,
           [__________________________]
                                                                            26




<PAGE>

     [________________];
     (h)   five million dollars ($5,000,000) worth of equity investment in
     SuperGen, subject to the terms and conditions of the Stock Purchase
     Agreement, upon Launch of the Product in the U.S. Territory, provided
     that, [__________________________];

     (i)   nine million dollars ($9,000,000) in cash, upon Launch of the
     Product in at least three (3) of the Major European Countries, provided
     that,  [__________________________];

                                                                            27
<PAGE>


     (j)   five million dollars ($5,000,000) worth of equity investment in
     SuperGen, subject to the terms and conditions of the Stock Purchase
     Agreement, upon Launch of the Product in at least three (3) of the Major
     European Countries, provided that, [__________________________];

     (k)   five million dollars ($5,000,000) in cash, upon Launch of the
     Product in Japan, provided that, [__________________________];

     (l)   ten million dollars ($10,000,000) in cash, upon the first occasion
     on which total annual Product Sales by Abbott in the Territories reaches
     [__________________________];

     (m)   ten million dollars ($10,000,000) in cash, upon the first occasion
     on which total annual Product Sales by Abbott in the Territories reaches
     [__________________________];

     (n)   ten million dollars ($10,000,000) worth of equity investment in
     SuperGen, subject to the terms and conditions of the Stock Purchase
     Agreement, upon the first occasion on which total annual Product Sales
     by Abbott in the Territories

                                                                            28
<PAGE>


     reaches [__________________________];

     (o)   ten million dollars ($10,000,000) in cash, upon the first occasion
     on which total annual Product Sales by Abbott in the Territories reaches
     [__________________________]; and

     (p)   ten million dollars ($10,000,000) worth of equity investment in
     SuperGen, subject to the terms and conditions of the Stock Purchase
     Agreement, upon the first occasion on which total annual Product Sales
     by Abbott in the Territories reaches [__________________________].

5.2  EQUITY PAYMENTS LIMITATION. The Parties acknowledge and agree that any
and all milestone payments to be made by Abbott pursuant to this Agreement as
equity investments in SuperGen shall be subject to the terms and conditions
of the Stock Purchase Agreement, which terms and conditions shall govern in
the event of any inconsistency or conflict between this Agreement and the
Stock Purchase Agreement with respect to any equity investment in SuperGen by
Abbott. In particular, the Parties acknowledge and agree that in no event
shall Abbott be required to make any equity investment in SuperGen, through
the payment of the equity milestones as set forth above or in any other
manner, which would cause Abbott to own in excess of nineteen percent (19%)
of the voting securities of SuperGen at any time; provided, however, that in
the event that any equity investment to be made by Abbott under this
Agreement would cause Abbott to own in excess of nineteen percent (19%) of
the voting securities of SuperGen, then Abbott's obligation to make such
equity investment shall be tolled for a period of  [__________]. If SuperGen
increases its share capital (other than by purchase of any equity in SuperGen
by Abbott) during such [________] period, such that Abbott would then be able
to make such equity investment and would not thereby own in excess of
nineteen percent (19%) of the voting securities of SuperGen, SuperGen may so
notify Abbott and Abbott shall make such equity investment, provided that
SuperGen may make only one such notification, with respect to the entire
amount of such equity investment, during such one-year period. If by the end
of such [________] period SuperGen has not increased its share capital (other
than by purchase of any equity in SuperGen by Abbott) during such  [______]
period, such that Abbott would then be able to make such equity
investment and would not thereby own in excess of nineteen percent (19%) of
the voting securities of SuperGen, then Abbott shall have no further
obligation to make such equity investment.

5.2  SINGLE PAYMENT OBLIGATION. Each of the foregoing milestones shall only
be paid once regardless of the number of acceptances or Launches with respect
to such Product, including multiple product forms of the same Compound,
additional active or inactive ingredients, indications, modalities and/or
dosage strengths.

5.4  METHOD OF PAYMENT. All cash payments due under this Article 5 shall be
paid by wire transfer or by such other means agreed upon by the Parties, in
each case at the


                                                                            29
<PAGE>


expense of Abbott, with twenty-four (24) hours advance notice of each wire
transfer, to the bank account(s) as SuperGen shall designate in writing
following the occurrence of each cash milestone event.

ARTICLE 6:       U.S. PROFIT SHARING

6.1  REPORTS BY ABBOTT. Within forty-five (45) days from the end of each
calendar quarter starting with the first calendar quarter for which the
Parties have budgeted expenditures under Article 4, Abbott shall deliver to
SuperGen a true and accurate written report showing whichever of the
following are applicable for such calendar quarter:

     (a)   the Abbott Net Sales and Net Units of Product Sold in: (i) the
     U.S. Territory and (ii) the International Territory (each in the
     aggregate and on a country-by-country basis;

     (b)   the Abbott Distribution Margin (including the
     [__________________________]) for the U.S. Territory; and

     (c)   the Abbott Operating Margin (including the
     [__________________________]) for the U.S. Territory.

6.2  REPORTS BY SUPERGEN. Within ten (10) days from the date of SuperGen's
receipt of Abbott's report pursuant to Article 6.1 above, SuperGen shall
deliver to Abbott a true and accurate written report showing whichever of the
following are applicable for such calendar quarter:

     (a)   the SuperGen Product Sales in the U.S. Territory;

     (b)   the SuperGen Distribution Margin 3 for the U.S. Territory (including
     the [__________________________]);

     (c)   the SuperGen Operating Margin for the U.S. Territory (including
     the [__________________________]); and

     (d)   the Abbott U.S. Profit Amount, the SuperGen U.S. Profit Amount,
     the U.S. Adjustment Amounts for each Party, and the Final Payment (as
     defined in Section 6.5 below) due to either Abbott or SuperGen.

6.3  U.S. PROFIT SPLIT. Commencing on the date of acceptance by the FDA of
the U.S. NDA for the Product, the U.S. Product Profit for each calendar year
(or portion thereof less than a full calendar year) shall be shared equally
between the Parties, fifty percent (50%) for SuperGen and fifty percent (50%)
for Abbott. The allocation of U.S. Product

                                                                            30
<PAGE>


Profit (whether a positive (profit) amount or a negative (loss) amount)
between Abbott and SuperGen pursuant to this Article 6.3 as of the end of the
applicable calendar quarter or year shall be called the "Abbott U.S. Profit
Amount" and the "SuperGen U.S. Profit Amount," respectively, which together
shall equal the U.S. Product Profit as of the end of such period. The Parties
understand that the U.S. Product Profit, the Abbott U.S. Profit Amount, and
the SuperGen U.S. Profit Amount can each be a negative number and represent a
net loss.

6.4  U.S. ADJUSTMENT AMOUNT. With respect to the U.S. Territory, for each
calendar quarter of each calendar year, the "U.S. Adjustment Amount" shall be
determined for Abbott by subtracting the [__________________________] in the
U.S. Territory and shall be determined for SuperGen by subtracting the
[__________________________] in the U.S. Territory. If the U.S. Adjustment
Amount is positive for one Party and negative for the other Party, then the
Party with the positive U.S. Adjustment Amount shall pay such amount to the
other Party, so that each Party receives or bears fifty percent (50%) of the
U.S. Product Profit for such calendar quarter.

6.5  FINAL PAYMENT. After each calendar quarter, any amount payable by one
Party to the other Party pursuant to Article 6.4. above ("Final Payment")
shall be paid by the owing Party within ten (10) business days of Abbott's
receipt of SuperGen's report under Section 6.2.

6.6  YEAR-END RECONCILIATION. Within forty-five (45) days after the end of
each calendar year starting with the first calendar year for which the
Parties have budgeted expenditures under Article 4, the U.S. Product Profit
split between the Parties pursuant to Article 6.3 above for such calendar
year shall be recalculated (the "Reconciliation Amount") to reflect any
amended information (including, but not limited to, amended sales data,
product returns or chargebacks) relevant to the calculation of the
Reconciliation Amount for such calendar year. Within ten (10) business days
after any such recalculation, [__________________________].

6.7  EXAMPLE OF U.S. PRODUCT PROFIT SHARING. Exhibit 6.7 attached hereto
shall illustrate, by way of example only and not as a limitation of any kind,
the method agreed by the Parties under this Article 6 for calculating and
splitting the U.S. Product Profit.

6.8  PAYMENT PROCEDURE. All payments due under this Article 6 shall be paid
in United States Dollars by wire transfer or by such other means agreed upon
by the Parties, in each case at the expense of the payor, for value no later
than the due date thereof (with twenty four (24) hours advance notice of each
wire transfer) to the bank accounts as the payee shall designate in writing
within a reasonable period of time prior to such due date.

6.9  RECORDS. Each Party shall keep and maintain records relating to the
subject matter of all reports and payments to be made pursuant to this
Article 6 for the U.S. Territory, so


                                                                          31


<PAGE>

that the reports and payments may be verified. Such records shall be open to
inspection at any reasonable time within two (2) years after the period to
which such records relate, but in any event not more than once per Sales
Year, by a nationally recognized independent certified public accountant
selected by the inspecting Party, approved by other Party, which approval
shall not be unreasonably withheld, and retained at inspecting Party's
expense. Said accountant shall sign a confidentiality agreement prepared by
the other Party and shall then have the right to examine the records kept
pursuant to this Agreement and report to the inspecting Party the findings
(but not the underlying data) of said examination of records as are necessary
to evidence that the records were or were not maintained and used in
accordance with this Agreement. A copy of any report provided to the
inspecting Party by the accountant shall be given concurrently to the other
Party. If said examination of records reveals more than five percent (5%)
underpayment of the royalty payable, expenses for said accountant shall be
borne by other Party and the other Party shall promptly pay to the inspecting
Party the balance due plus interest calculated at the prime rate of interest
as reported in the WALL STREET JOURNAL for the date of the accountant's
report which reveals such underpayment.

6.10 TAXES. Where any sum due to be paid to a Party under this Article 6 is
subject to any withholding or similar tax, the Parties shall use their
reasonable efforts to do all such acts and things and to sign all such
documents as will enable them to take advantage of any applicable double
taxation agreement or treaty. In the event there is no applicable double
taxation agreement or treaty, or if an applicable double taxation agreement
or treaty reduces but does not eliminate such withholding or similar tax, the
Party making a payment shall pay such withholding or similar tax to the
appropriate government authority, deduct the amount paid from the amount due
to the other Party, and secure and send to the other Party the best available
evidence of such payment.

6.11 NO DOUBLE COUNTING OF COSTS. For the purpose of determining any cost or
expense which is shared by the Parties under this Agreement or otherwise
invoiced by one Party to another under this Agreement, any cost or expense
allocated by either Party to a particular cost category shall be consistent
with the terms of this Agreement and shall not also be allocated to another
category. In the event a cost or expense might arguably fall into more than
one category, the Parties shall mutually determine which category such cost
or expense most appropriately falls into.


ARTICLE 7:       INTERNATIONAL ROYALTY

7.1  ROYALTY PERIOD AND ROYALTY RATE. For a period of  [______]  years from
the First Commercial Sale or so long as the Product remains Patent Protected
in any country in the International Territory,  [___________________],
("Royalty Period"), Abbott shall pay to SuperGen a royalty of
[_____________________] of the Abbott Net Sales of the Product in the
International Territory.

7.2  ROYALTY RATE REDUCTION If during the Royalty Period, a generic version
of the Product is marketed by a Third Party in a country in the International
Territory, the

                                                                            32
<PAGE>


Parties shall [__________________________].

7.3  ROYALTY STATEMENTS. Each royalty payment shall be accompanied by a
statement from Abbott showing Abbott Net Sales for the Product in the
International Territory, by country. The royalty shall be computed in United
States Dollars pursuant to Abbott's standard internal accounting practices
and policies.

7.4  ROYALTY PAYMENT. Royalty payments shall be made by Abbott to SuperGen in
United States Dollars within sixty (60) days after the last day of February,
May, August, and November for royalties accruing on Net Sales during the
three (3) preceding Months.

7.5  PAYMENT PROCEDURE. All payments due under this Article 7 shall be paid
by wire transfer or by such other means agreed upon by the Parties, in each
case at the expense of the payor, for value no later than the due date
thereof (with twenty four (24) hours advance notice of each wire transfer) to
the bank accounts as the payee shall designate in writing within a reasonable
period of time prior to such due date.

7.6  NO MULTIPLE ROYALTIES. No multiple royalties shall be payable because a
Product, its manufacture, use or sale is or shall be covered by more than one
Valid Claim of a patent included in the Licensed Patents or more than one
patent under the Licensed Patents.

7.7  SALES TO AFFILIATES. No royalties shall be payable on sales between and
among Abbott and/or its Affiliates, but shall be payable on the first sale by
Abbott and/or its Affiliates to a Third Party in the International Territory.

7.8  RECORDS. Abbott and/or its Affiliates shall keep and maintain records of
sales made pursuant to the license granted by SuperGen to Abbott for the
Product in the International Territory under this Agreement, so that the
royalty payable and the royalty statement may be verified. Such records shall
be open to inspection at any reasonable time within two (2) years after the
royalty period to which such records relate, but in any event not more than
once per Sales Year, by a nationally recognized independent certified public
accountant selected by SuperGen, approved by Abbott, which approval shall not
be unreasonably withheld, and retained at SuperGen's expense. Said accountant
shall sign a confidentiality agreement prepared by Abbott and shall then have
the right to examine the records kept pursuant to this Agreement and report
to SuperGen the findings (but not the underlying data) of said examination of
records as are necessary to evidence that the records were or were not
maintained and used in accordance with this Agreement. A copy of any report
provided to SuperGen by the accountant shall be given


                                                                            33
<PAGE>


concurrently to Abbott. If said examination of records reveals more than five
percent (5%) underpayment of the royalty payable, expenses for said
accountant shall be borne by Abbott and Abbott shall promptly pay to SuperGen
the balance due plus interest calculated at the prime rate of interest as
reported in the WALL STREET JOURNAL for the date of the accountant's report
which reveals such underpayment.

7.9  TAXES. Where any sum due to be paid to SuperGen under this Article 7 is
subject to any withholding or similar tax, the Parties shall use their
reasonable efforts to do all such acts and things and to sign all such
documents as will enable them to take advantage of any applicable double
taxation agreement or treaty. In the event there is no applicable double
taxation agreement or treaty, or if an applicable double taxation agreement
or treaty reduces but does not eliminate such withholding or similar tax,
Abbott shall pay such withholding or similar tax to the appropriate
government authority, deduct the amount paid from the amount due SuperGen and
secure and send to SuperGen the best available evidence of such payment.


ARTICLE 8:       PRODUCT SUPPLY AND DISTRIBUTION

8.1  PRODUCT DISTRIBUTION.

     (a)   SuperGen shall be responsible for the manufacture, packaging,
     sterilization and labeling of the Product. Abbott shall exclusively
     distribute the Product in the Territories to Third Party customers,
     including all activities ancillary thereto (including, without
     limitation, warehousing and shipping).

     (b)   Abbott shall use its reasonable efforts to distribute the Product
     in the Territories to maximize the sales of the Product in the
     Territory.  [__________________________] Abbott shall keep SuperGen
     fully apprised with respect to its distribution. Abbott shall control
     all final decisions regarding such distribution activities.

8.2  PRODUCT SUPPLY.

     (a)   Abbott shall exclusively purchase from SuperGen or from its
     designated Third Party manufacturer(s), and SuperGen shall exclusively
     supply to Abbott (or shall cause or its designated Third Party
     manufacturer(s) to supply exclusively to Abbott), Abbott's requirements
     for the Product in the Territories.

     (b)   Abbott shall purchase Finished Product for the U.S. Territory from
     SuperGen or from its designated Third Party manufacturer(s) at the U.S.
     Transfer Price, which shall be equal to  [__________________________]
     fiscal quarter in which Abbott is purchasing such

                                                                            34
<PAGE>


     Product from SuperGen or from its designated Third Party
     manufacturer(s). Abbott shall calculate its average net selling price
     for this purpose in accordance with Abbott internal accounting policies
     and practices.

     (c)   Abbott shall purchase Finished Product for the International
     Territory from SuperGen or from its designated Third Party
     manufacturer(s) at the International Transfer Price, which shall be
     equal to  [__________________________] fiscal quarter in which Abbott is
     purchasing such Product from SuperGen or from its designated Third Party
     manufacturer(s). Abbott shall calculate its average net selling price
     for this purpose in accordance with Abbott internal accounting policies
     and practices.

     (d)   The Parties shall cooperate to determine manufacturing strategy
     and objectives for the supply of Compound, Product, and Finished Product
     consistent with the terms of this Agreement, including but not limited
     to agreeing in writing on the Specifications and attaching such
     Specifications to this Agreement as Exhibit 1.39 within  days
     of the Effective Date, and to qualifying a second manufacturer for the
     Compound, acceptable to both Parties, as soon as possible after the
     Effective Date.

     (e)   Within  [______] months prior to the agreed projected Launch of
     the Product in the U.S. Territory, the U.S. Marketing Board shall
     establish a sales forecast for such Product specifying the Parties'
     anticipated requirements of the Finished Product in the U.S. Territory
     for the [_____________] commencing approximately  [_________] prior to
     the anticipated date of Launch (the "U.S. Sales Forecast"). The U.S.
     Marketing Board shall be responsible for establishing, preparing and
     updating the U.S. Sales Forecast.

     (f)   Within [______] twelve (12) the agreed projected Launch of
     the Product in the International Territory, Abbott shall establish a
     sales forecast for such Product specifying Abbott's anticipated
     requirements of the Finished Product in the International Territory for
     the [_____________] commencing approximately  [________________]
     prior to the anticipated date of Launch (the "International Sales
     Forecast"). Abbott shall be responsible for establishing, preparing and
     updating the International Sales Forecast.

     (g)   Such Sales Forecasts for the U.S. Territory and the International
     Territory, respectively, shall be updated on a quarterly basis so that
     at the beginning of each calendar quarter, SuperGen shall have been
     provided with rolling Sales Forecasts for the twelve (12) month period
     commencing with the third (3rd) calendar quarter after the date on which
     such Sales Forecasts are submitted (i.e. approximately 270 days). By way
     of example only, at the end of the first quarter of a calendar year
     (assuming the Product has been Launched), the U.S. Marketing Board shall
     provide SuperGen with a Sales Forecast of the anticipated

                                                                            35
<PAGE>


     requirements of Finished Product for the U.S. Territory for the twelve
     (12) months consisting of the four quarters of the next calendar year.

8.3  COMMERCIAL SCALE-UP AND DEVELOPMENT. SuperGen shall exercise its
reasonable efforts to pursue the process development of the Product. The
Parties shall cooperate to determine the Specifications, process development
strategy and objectives for the production of the Compound, the Product, and
the Finished Product, consistent with the terms of this Agreement; provided
that SuperGen shall have control of all final decisions regarding process
development. SuperGen shall bear the full costs and expenses of such process
development, provided that the costs and expenses of producing validation
batches of the Product shall be included in [__________________________], as
applicable, to the extent that the Product from such validation batches are
ultimately sold.

8.4  PRODUCT ORDERING AND DELIVERY.

     (a)   Abbott shall purchase Finished Product at the applicable U.S. or
     International Transfer Price by means of purchase orders submitted to
     SuperGen at least [__________________] in advance of the requested
     delivery date. Each purchase order shall be governed by the terms of
     this Agreement and none of the terms or conditions of Abbott's purchase
     orders, SuperGen's acknowledgment forms or any other forms exchanged by
     the parties shall be applicable, except those, to the extent consistent
     with the terms set forth herein, specifying quantity ordered, delivery
     locations and delivery schedule and invoice information;

     (b)   All purchase orders for delivery during a calendar month that do
     not exceed [_________________________] of the latest Sales Forecast
     covering such month (excluding any amendments subsequent to the original
     date of such Sales Forecast) shall be deemed accepted by SuperGen.
     SuperGen shall use its reasonable efforts to supply Abbott with any
     Finished Product in excess [__________________________] of such Sales
     Forecast. All other purchase orders must be accepted or rejected by
     SuperGen, in writing, by facsimile or air courier, within fifteen (15)
     business days after receipt from Abbott. If SuperGen does not provide
     such notice of acceptance or rejection within fifteen (15) business
     days, it shall be deemed to have accepted such purchase orders in full.
     SuperGen shall deliver all accepted orders to Abbott promptly and shall
     deliver Abbott's first order for Finished Product to be sold in the U.S.
     Territory and the International Territory, respectively, within thirty
     (30) days of Regulatory Approval in those respective territories.

     (c)   All Finished Products shall be delivered [__] to Abbott's
     designated destination. Title and risk of loss shall pass from SuperGen
     to Abbott [_____________________].

     (d)   SuperGen shall invoice Abbott at the applicable U.S. or
     International

                                                                            36
<PAGE>

     Transfer Prices for all Finished Product delivered, and Abbott shall
     pay to SuperGen the amount invoiced within thirty (30) days of the
     invoice date.

8.5  INVENTORIES AND ALLOCATION.

     (a)   Subject to the receipt of Finished Product from SuperGen in
     accordance with this Article 8, Abbott shall use its reasonable efforts
     to maintain adequate inventories of the Finished Product in the
     Territories to meet the needs of its customers on a timely basis based
     upon, among other factors, the Sales Forecast, previous demand histories
     and seasonal trends, and any customers' contractual commitments.
     SuperGen shall use its reasonable efforts to maintain adequate
     inventories of Finished Product to meet the needs of Abbott on a timely
     basis, including but not limited to ensuring that any Third Party
     manufacturer shall maintain at least [_______________] worth of Finished
     Product in inventory.

     (b)   In the event that SuperGen (or its designated Third Party
     manufacturer(s)) are unable to fill accepted orders for the Finished
     Product placed by Abbott pursuant to this Agreement for a total of
     [__________________________], Abbott may at its sole option:
     [__________________________].

     (c)   In the event that a visit or report by an authorized agent of a
     governmental agency in the Territories, or a visit by an outside
     independent quality assurance auditor acceptable to both Parties,
     reveals that SuperGen's (or SuperGen's Third-Party manufacturer's)
     facilities and processes for manufacturing the Compound, the Product or
     the Finished Product do not comply with applicable laws and regulations,
     including without limitation Current Good Manufacturing Practices, and
     if SuperGen does not rectify the situation to Abbott's reasonable
     satisfaction within sixty (60) days of Abbott's notice to SuperGen of
     such situation, then [__________________________].

     (d)    [__________________________].

                                                                            37
<PAGE>


8.6  CUSTOMER RELATIONS.

     (a)   With respect to customer complaints relating to the Promotion or
     distribution of the Product, each Party shall act promptly to remedy
     such complaints. All Product-related inquiries and Product complaints in
     the U.S. Territory shall be addressed by SuperGen, and all
     Product-related inquiries and Product complaints in the International
     Territory shall be addressed by Abbott. Each Party shall keep the other
     Party fully and promptly apprised of its receipt of any such significant
     complaints in the Territories, and provide reasonable cooperation and
     assistance in dealing with customer complaints in the Territories, the
     [__________________________].

     (b)   Any Product warranty to the customers of Abbott and SuperGen shall
     run directly from SuperGen to such customers, notwithstanding the fact
     that Abbott's customers may return Product to Abbott and not to
     SuperGen. Abbott shall not make any warranty or representation to any
     customers which is more protective of such customers than the warranties
     and/ or representations provided by SuperGen. For purposes of
     clarification, the sole remedy of Abbott and/ or SuperGen customers in
     the case of defective Product shall be that the Party which sold the
     defective Product to the customer shall replace such returned defective
     Product. SuperGen's Product warranties shall not apply to Product that
     has been modified or altered in any manner by anyone other than SuperGen
     or Abbott (or their respective Affiliates or subdistributors or
     sublicensees), or to defects caused (i) through no fault of SuperGen
     SuperGen or Abbott (or their respective Affiliates or subdistributors or
     sublicensees), during shipment, (ii) by negligence or misuse on the part
     of anyone other than SuperGen or Abbott (or their respective Affiliates
     or subdistributors or sublicensees) or (iii) by storage, handling, or
     usage in any manner inconsistent with the approved Product labeling.

     (c)   Neither Party shall represent the Product in any manner which is
     inconsistent with the approved Product labeling or with applicable laws
     and regulations, or otherwise misrepresent the Product.

8.7  QUALITY CONTROLS. Both Parties shall institute quality controls in
accordance with, and shall comply with, applicable laws and regulations and
generally accepted industry standards (including CGMPs as defined below) for
the manufacture, storage, shipment, handling and distribution of the
Compound, the Product and the Finished Product (as the case may be) and shall
define responsibilities for key quality systems and a quality manual agreed
to by both Parties (including without limitation, Sample Packs) and shall
comply with all applicable laws and regulations relating to the storage,
shipment, handling and distribution of the Compound, the Product and the
Finished Product. Each Party shall have the right to audit all facilities
used by the other Party to fulfill their obligations under this Agreement
(including any Third Party manufacturing facilities). For the purposes of
this Agreement, "CGMPs" means all applicable standards relating to


                                                                            38
<PAGE>


manufacturing practices for intermediates, bulk products, or finished
pharmaceutical products (i) promulgated in the form of laws or regulations by
the FDA or its counterpart governmental agencies or entities in the EU and/
or a country in the International Territory or (ii) promulgated by the FDA or
its counterpart governmental agencies or entities in the EU and/ or a country
in the International Territory in the form of guidance documents (including
but not limited to advisory opinions, compliance policy guides and
guidelines) which guidance documents are being implemented within the
pharmaceutical manufacturing industry for such products.

8.8  PRODUCT CHARACTERISTICS.

     (a)   Abbott shall not be obligated to accept from SuperGen any Finished
     Product with less than [__________________________].

     (b)   SuperGen shall provide Abbott with a certificate of analysis with
     respect to the shipment of the Finished Product to Abbott. Full batch
     documentation, including batch production records, and manufacturing and
     analytical records shall be available for review by Abbott on site at
     the manufacturing facility used by SuperGen (or by SuperGen's Third
     Party manufacturer(s)), during regular business hours and upon
     reasonable advance written notice from Abbott.

     (c)   Abbott shall notify SuperGen in writing of any defect or shortage
     in the quantity of any shipment of Finished Product no later than
     [_______________]  following receipt of the Finished Product. In the
     event of any such defect or shortage, SuperGen shall, at SuperGen's
     choice, replace the defective Finished Product or make up the shortage
     if replacement stock is available in the next shipment of Finished
     Product, but in any case no later than  [__________________________] or,
     if no such replacement stock is available, as soon as reasonably
     practical after receiving such notice, at no additional cost to Abbott.

     (d)   With respect to all SuperGen Third Party manufacturers of the
     Compound, the Product, and the Finished Product, SuperGen shall provide
     Abbott with a continuing FDA guarantee in the format as set forth in 21
     C.F.R. Section 7.13(A)(j).


ARTICLE 9:       LICENSE AND PATENT MATTERS

9.1  PATENT PROSECUTION AND MAINTENANCE. SuperGen at its sole cost and
expense shall maintain the Licensed Patents listed in Exhibit 1.23, and shall
use its reasonable commercial efforts to prosecute any such patent
applications included therein, in at least the countries listed on Exhibit
1.23, and obtain all available patent term extensions. The Parties shall
consult together and shall jointly determine patent issues, including but not
limited to patenting strategy, prosecution, and response to patent office
actions, and Abbott shall provide such assistance as SuperGen may reasonably
request with respect to such matters. [__________________________]


                                                                            39
<PAGE>



[__________________________]. SuperGen shall inform Abbott, on an annual
basis and also on Abbott's written request, about the status of such patent
applications and/or patents.

[__________________________], SuperGen shall commit to file additional patent
applications claiming the indications listed in Exhibit 3.1 and as determined
to be appropriate in consultation with Abbott. In the event SuperGen fails to
submit such patent applications, Abbott shall be entitled to prepare and file
such applications on behalf of SuperGen and shall co-own any such Abbott
filed patents. SuperGen shall bear the cost of such patent applications. In
addition, SuperGen shall have the obligation to file patent applications as
deemed appropriate by the Clinical Development Committee on a on-going basis
throughout the term of this agreement.

9.2  SUPERGEN COVENANTS. SuperGen covenants that during the term of this
Agreement, it will:

     (a)   fulfill all of its obligations under the  [_____________________]
     or other agreements or other agreements relating to the Product to which
     SuperGen is a Party or becomes a Party during the term of this Agreement
     (collectively, the "SuperGen License Agreements"), including, but not
     limited to, any royalty, milestone or other monetary obligations set
     forth therein;

     (b)   take no action nor will it omit to take any action which would
     cause it to be in breach of any provision of any of the SuperGen License
     Agreements relating to the Product which would or could otherwise
     trigger termination of any such Agreements (e.g., bankruptcy, change of
     control in whole or with respect to any part of the Territories) or
     which would or could cause the conversion of any SuperGen License
     Agreement from an exclusive to nonexclusive agreement, in whole or with
     respect to any part of the Territories;

     (c)   notify Abbott in the event that, and within
     [__________________________] after, SuperGen receives notice from any of
     SuperGen's licensors that SuperGen is in default under any SuperGen
     License Agreement relating to the Product or that any such SuperGen
     licensor has terminated or intends to terminate any SuperGen License
     Agreement in whole or with respect to any part of the Territories or
     convert any SuperGen License Agreement from an exclusive to
     non-exclusive agreement in whole or with respect to any part of the
     Territories, or otherwise take any action in connection with a SuperGen
     License Agreement which would adversely affect Abbott's rights under
     this Agreement. In the event of any default of the type described in
     this Section 9.2(c), SuperGen agrees that [__________________________]


                                                                            40
<PAGE>

      [__________________________];

     (d)   provide Abbott with a copy of any reports, correspondence or
     notice within three (3) business days from the submission to or receipt
     from  [________________________] under any SuperGen License Agreement.

     (e)   notify Abbott no later than [________] prior to implementing
     any decision to abandon or allow to lapse any patent application or
     patent or not to initiate or take any other patent prosecution activity
     with respect to any Product Patent. In such event, SuperGen agrees that
     Abbott may assume any such patent prosecution activity in connection
     therewith, and SuperGen shall reasonably cooperate with Abbott in
     connection with any such patent prosecution activity and, if requested
     by Abbott, shall use its reasonable efforts to seek the cooperation of
     [__________________________]; and

     (f)   take no action nor will it omit to take any action which would
     result in derogation of the Licensed Patents in any existing or future
     litigation or interference with any Third Parties or future oppositions
     to foreign patents of any Third Parties.

9.3  THIRD PARTY INFRINGEMENT. If Abbott or SuperGen become aware of any
activity on the part of any Third Party that such Party believes infringes a
Valid Claim of a Licensed Patent, such Party shall promptly notify the other
Party of all relevant facts and circumstances pertaining to the potential
infringement. SuperGen shall have the right to enforce any rights within the
Licensed Patents against such infringement, at its own cost and expense.
Abbott, at its own expense, shall cooperate with SuperGen in such effort,
including but not limited to being joined as a Party to such action, and
SuperGen shall use its reasonable efforts to obtain the cooperation of
Stehlin and any other Third Party licensor in connection with such
enforcement.

9.4  ABBOTT'S RIGHT TO PURSUE THIRD PARTY INFRINGERS. If SuperGen shall fail,
within [__________________________], to either (A) terminate such
infringement or (B) institute an action seeking to prevent continuation
thereof, and thereafter to diligently prosecute such action, or if SuperGen
sooner notifies Abbott that it does not plan to terminate the infringement or
institute such action, then Abbott shall have the right to do so at its own
expense. SuperGen, at its own expense, shall cooperate in such effort,
including being joined as a Party to such action, and SuperGen shall use its
reasonable efforts to obtain the cooperation of [__________________________].

9.5  ALLOCATION OF DAMAGE OR SETTLEMENT AMOUNTS. Any damage award or
settlement

                                                                            41
<PAGE>


obtained by a Party enforcing a Licensed Patent pursuant to Article 9.3 or
9.4 above shall [__________________________].


ARTICLE 10:      ADVERSE EVENTS, RECALLS AND OTHER REGULATORY MATTERS

10.1     ADVERSE REACTION REPORTING. Each Party shall keep the other Party
informed of information in or coming into its possession or control
concerning side effects, injury, toxicity or sensitivity reaction and
incidents of severity thereof associated with commercial and clinical uses,
studies, investigations or tests of each Product in the Territories, whether
or not determined to be attributable to the Product. SuperGen shall be
responsible for filing with the FDA, as required pursuant to 21 C.F.R. Sec.
314.80, any adverse reaction reports that it receives. Abbott shall be
responsible for filing with the appropriate regulatory authorities in the
International Territory, as required, adverse reaction reports that it
receives. Within four (4) months of the Effective Date, the respective
pharmacovigilance groups of SuperGen and Abbott shall enter into a separate
agreement covering adverse event information exchange relating to the Product.

10.2     SAFETY ISSUES. In order to ensure that both Parties are provided
with an adequate opportunity to review safety matters, the Parties shall
mutually agree after the Effective Date on procedures with respect to (i)
regulatory reporting requirements, (ii) the review of Product labeling, (iii)
maintenance of a safety database and (iv) other safety issues.

10.3     PRODUCT COMPLAINTS AND INQUIRIES.

         (a) Any medical or technical Product-related inquiries from consumers,
         physicians or other Third Party customers who reside in the (i) U.S.
         Territory shall be handled by SuperGen and (ii) International Territory
         shall be handled by Abbott. SuperGen shall supply Abbott with copies of
         its standard response information for the Product as well as any
         updates thereto. Abbott shall use such information to respond to any
         such inquiries from the International Territory. Each Party shall
         prepare and maintain a database containing responses to such inquiries
         from consumers, physicians or other Third Party customers who reside in
         the territory for which it is responsible, and shall make the contents
         available to the other Party promptly from time to time upon request.

         (b) Each Party shall maintain a record of all complaints or reports of
         an actual or potential failure of any Product to meet the
         specifications set forth in regulatory filings or in agreements among
         the Parties. Such failure may involve the finished Product or one of
         its intermediate stages. The responsibilities of the Parties with
         respect to (a) notification of the product complaint from the receiving
         Party to the other Party and (b) the handling of product complaints
         shall all be performed in accordance with a procedure to be mutually
         agreed by the Parties after the Effective Date.


                                                                            42

<PAGE>


10.4     PRODUCT RECALL. In the event that either Party determines that an
event, incident or circumstance has occurred which may result in the need for
a recall or other removal of any Product, or any lot or lots thereof, from
the market in any part or all of the Territories, such Party shall advise the
other Party and the Parties shall consult with respect thereto. SuperGen
shall have the sole authority to decide whether to commence, and the sole
responsibility for the handling and disposition of, a recall or other removal
of such Product in the U.S. Territory, and Abbott shall have the sole
authority to decide whether to commence, and the sole responsibility for the
handling and disposition of, a recall or other removal of such Product in the
International Territory. Any such recall or other removal, by either Party,
shall occur pursuant to a procedure to be mutually agreed by the Parties
after the Effective Date. Except as provided below, if a Product (or any lot
or lots thereof) is recalled or otherwise removed from the market, the costs
and expenses of such recall or removal, including, without limitation,
expenses and other costs or obligations to Third Parties, the cost and
expense of notifying customers and the costs and expenses associated with
shipment of the recalled Product and the cost and expense of destroying the
Product removed from the market, if necessary, except as provided below shall
be [__________________________].

10.5     GOVERNMENTAL CONTACT REPORTING . Each Party shall promptly notify
the other Party upon being contacted by the FDA or any other competent
governmental authority or agency in the Territories for any material
regulatory purpose pertaining to this Agreement or to the Product. Neither
Party shall respond to the FDA or such other authority or agency before
consulting with the other Party, unless under the circumstances pursuant to
which FDA or such other authority or agency contacts such Party, it is not
practical or lawful for the contacted Party to give the other Party advance
notice, in which event the contacted Party shall inform the other Party of
such contact as soon as practical and lawful. In addition, each Party shall
keep the other Party advised with respect to information concerning the
safety or efficacy of the Product, including but not limited to providing,
within three (3) business days of the creation or receipt thereof, all
information regarding such safety, efficacy and medical information issues
and copies of safety reports filed with the FDA or any other authority or
agency.

ARTICLE 11:   REPRESENTATIONS AND WARRANTIES

11.1     ABBOTT REPRESENTATIONS AND WARRANTIES. Abbott hereby represents to
SuperGen as follows:

                                                                          43

<PAGE>


         (a) Abbott is a corporation duly organized and validly existing in
         good standing under the laws of its state of incorporation, with
         all requisite corporate power and authority to own, lease and
         operate its properties and assets and to carry on its business as
         presently conducted and as proposed to be conducted;

         (b) Abbott has all requisite corporate right, power and authority to
         enter into this Agreement and the other SuperGen-Abbott Agreements
         and to consummate the transactions contemplated hereby and thereby. The
         execution and delivery of this Agreement and the other SuperGen-Abbott
         Agreements by Abbott and the consummation by Abbott of the transactions
         contemplated hereby and thereby have been duly authorized by all
         necessary corporate action on Abbott's behalf. This Agreement and the
         other SuperGen-Abbott Agreements constitute legal, valid and binding
         obligations of Abbott, enforceable against Abbott in accordance with
         the terms hereof and thereof;

         (c) the execution, delivery and performance by Abbott of this Agreement
         and each of the other SuperGen-Abbott Alliance Agreements and Abbott's
         compliance with the terms and provisions hereof and thereof will not,
         result in any violation of, or default under (with or without notice or
         lapse of time, or both), or give rise to a right of termination,
         cancellation or acceleration of any obligation pursuant to, or a loss
         of benefits under, any provision of Abbott's Articles of Incorporation
         or By-laws, or any mortgage, indenture, lease or other agreement or
         instrument, license, judgment, order, decree, statute, law, ordinance,
         rule or regulation applicable to Abbott, its properties or assets; and

         (d) no consent, approval or authorization of, or designation,
         declaration or filing with any governmental authority is required in
         connection with the valid execution, delivery or performance of this
         Agreement and the other SuperGen-Abbott Agreements by Abbott or the
         consummation by Abbott of the transactions contemplated hereby or
         thereby. Upon their execution and delivery, and assuming the valid
         execution thereof by SuperGen, this Agreement and the other
         SuperGen-Abbott Agreements will constitute valid and binding
         obligations of Abbott, enforceable against Abbott in accordance with
         their respective terms, except as enforceability may be limited by
         applicable bankruptcy, insolvency, reorganization, moratorium or
         similar laws affecting creditors' and contracting parties' rights
         generally and except as enforceability may be subject to general
         principles of equity (regardless of whether such enforceability is
         considered in a proceeding in equity or at law) and except to the
         extent that the indemnification agreements of in Section 15 hereof may
         be legally unenforceable.

11.2     SUPERGEN REPRESENTATIONS AND WARRANTIES. SuperGen hereby represents
and warranties to Abbott as follows:

         (a) SuperGen is a corporation duly organized and validly existing in
         good standing under the laws of its state of incorporation, with all
         requisite corporate power and authority to own, lease and operate its
         properties and assets and to

                                                                          44

<PAGE>

         carry on its business as presently conducted and as proposed to be
         conducted;

         (b) SuperGen has all requisite corporate right, power and authority
         to enter into this Agreement and the other SuperGen-Abbott
         Agreements and to consummate the transactions contemplated hereby
         and thereby. The execution and delivery of this Agreement and the
         other SuperGen-Abbott Agreements by SuperGen and the consummation by
         SuperGen of the transactions contemplated hereby and thereby have
         been duly authorized by all necessary corporate action on SuperGen's
         behalf, including but not limited to approval by the stockholders of
         SuperGen with respect to the SuperGen-Abbott Agreements. This
         Agreement and the other SuperGen-Abbott Agreements constitute legal,
         valid and binding obligations of SuperGen, enforceable against
         SuperGen in accordance with the terms hereof and thereof,

         (c) the execution, delivery and performance by SuperGen of this
         Agreement and each of the other SuperGen-Abbott Agreements and
         SuperGen's compliance with the terms and provisions hereof and
         thereof will not result in any violation of or default under (with
         or without notice or lapse of time, or both), or give rise to a
         right of termination, cancellation or acceleration of any obligation
         pursuant to, or a loss of benefits under, any provision of its
         Certificate of Incorporation or By-laws, or any mortgage, indenture,
         lease or other agreement or instrument, license, judgment, order,
         decree, statute, law, ordinance, rule or regulation applicable to
         SuperGen or SuperGen's properties or assets;

         (d) no consent, approval or authorization of, or designation,
         declaration or filing with any governmental authority is required in
         connection with the valid execution, delivery or performance of this
         Agreement and the other SuperGen-Abbott Agreements by SuperGen or
         the consummation by SuperGen of the transactions contemplated hereby
         or thereby. Upon their execution and delivery, and assuming the
         valid execution thereof by Abbott, this Agreement and the other
         SuperGen-Abbott Agreements will constitute valid and binding
         obligations of SuperGen, enforceable against SuperGen in accordance
         with their respective terms, except as enforceability may be limited
         by applicable bankruptcy, insolvency, reorganization, moratorium or
         similar laws affecting creditors' and contracting parties' rights
         generally and except as enforceability may be subject to general
         principles of equity (regardless of whether such enforceability is
         considered in a proceeding in equity or at law) and except to the
         extent that the indemnification agreements of in Section 15 hereof
         may be legally unenforceable;

         (e) to its knowledge and information, as of the Effective Date,
         there are no patents, trademarks or other proprietary rights which
         are valid and which would be infringed by making, having made,
         using, selling, offering for sale or importing the Product in the
         Territories in accordance with the terms of this Agreement;

         (f) as of the Effective Date, SuperGen is not aware of any compounds
         or

                                                                          45

<PAGE>


         products, the manufacture, use, importation, selling or offering for
         sale of which would constitute an infringement by a Third Party of the
         Product Patents;

         (g) as of the Effective Date, SuperGen is aware of no pending
         interference, opposition proceeding, litigation or any communication
         which threatens an interference or opposition proceeding or
         litigation before any patent and trademark office, court, or any
         other competent entity in any jurisdiction in regard to the Product
         Patents;

         (h) as of the Effective Date, SuperGen has disclosed to Abbott all
         protocols, data (including but not limited to preclinical and
         clinical data), reports, and other information and materials
         regarding the Compound and the Product;

         (i) as of the Effective Date, SuperGen has provided to Abbott a
         complete and accurate copy of each of the SuperGen license
         agreements with respect to the Product;

         (j) as of the Effective Date, there are no material facts which
         SuperGen has not disclosed to Abbott regarding the manufacture, use
         or sale of any Product or the practice of any inventions included in
         the Product Patents or the use of the Product Technology by Abbott,
         including without limitation any material facts regarding the
         possibility that such manufacture, use, sale or practice might
         infringe any Third Party's know-how, patent rights or other
         intellectual property in the Territories;

         (k) at no time during the term of this Agreement shall SuperGen enter
         into any transaction providing for debt financing which by its terms
         (A) imposes a lien, license, security interest or other encumbrance
         upon or (B) transfers any of the SuperGen Technology relating to the
         Compound or the Product;

         (l) with respect to the Compound, (A) SuperGen has obtained and is in
         substantial compliance with all applicable regulatory approvals,
         applications, licenses, requests for exemption, permits or other
         regulatory authorizations with the FDA, or any state or local
         regulatory body necessary to conduct its business activities to date;
         and (B) to the extent the Compound is intended for export from the
         United States, and to the extent applicable, SuperGen is in compliance
         in all material respects with either all FDA requirements for marketing
         or as set forth in 21 U.S.C. Section 38l(e) or 382;

         (m) to the knowledge and information of SuperGen, all manufacturing
         operations performed by or on behalf of SuperGen for the Compound and/
         or the Product have been and are being conducted in substantial
         compliance with the current good manufacturing practices issued by the
         FDA and all other relevant governmental authorities or agencies, to the
         extent applicable;

         (n) to the knowledge and information of SuperGen, all nonclinical
         laboratory


                                                                          46

<PAGE>


         studies, as described in 21 C.F.R. Section 58.3(d), sponsored by
         SuperGen for the Compound and/ or the Product have been and are
         being conducted in substantial compliance with the good laboratory
         practice regulations set forth in C.F.R. Part 58 and similar
         regulations of all other relevant governmental authorities or
         agencies, to the extent applicable; and

         (o) Finished Product supplied to Abbott by SuperGen under this
         Agreement shall conform to the Specifications applicable thereto and
         shall be manufactured in compliance with applicable CGMPs and other
         applicable laws and regulations in the Territories, and Compound and
         Product used in Finished Product supplied to Abbott by SuperGen
         under this Agreement shall conform to the Specifications applicable
         thereto and shall be manufactured in compliance with applicable
         CGMPs and other applicable laws and regulations in the Territories.

11.3     LIMITATION ON WARRANTIES. EXCEPT AS OTHERWISE EXPRESSLY PROVIDED IN
THIS AGREEMENT, EACH PARTY MAKES NO OTHER WARRANTIES OR REPRESENTATIONS,
INCLUDING FITNESS FOR PURPOSE INTENDED OR MERCHANTABILITY, WHETHER EXPRESS OR
IMPLIED.

ARTICLE 12:   LIMITATION ON LIABILITY

EXCEPT AS OTHERWISE PROVIDED, NEITHER PARTY SHALL BE LIABLE FOR ANY SPECIAL,
INCIDENTAL, INDIRECT OR CONSEQUENTIAL ARISING OUT OF OR RELATING TO THIS
AGREEMENT; PROVIDED HOWEVER, THIS LIMITATION SHALL NOT APPLY TO LOSSES ARISING
FROM THIRD PARTY CLAIMS FOR WHICH A PARTY IS INDEMNIFIED UNDER THE TERMS OF THIS
AGREEMENT.

ARTICLE 13:   CONFIDENTIALITY AND NONDISCLOSURE

13.1     CONFIDENTIALITY OBLIGATION. Each of Abbott and SuperGen (the
"Receiving Party") shall keep strictly confidential any information disclosed
in writing, orally, visually or in any other manner by the other Party (the
"Disclosing Party") or otherwise made available to the Receiving Party which
the Disclosing Party considers to be and treats as proprietary or
confidential ("Confidential Information"). Without limiting the generality of
the foregoing, all proprietary information concerning the Disclosing Party's
business, operations, suppliers, products, product manufacture, sale,
marketing or distribution, trade secrets and intellectual property shall be
considered Confidential Information by the Receiving Party. Any data or other
information relating to or resulting from the clinical trials of the Product
shall be deemed to be Confidential Information of SuperGen. The Disclosing
Party shall use commercially reasonable efforts to designate any written
Confidential Information disclosed to the other Party as Confidential
Information by prominently marking it "confidential," provided that the
failure to so mark shall not exclude such written information from the
provisions of this Section 13. "Confidential Information" shall not include
information:


                                                                          47

<PAGE>


         (a) which is or becomes generally available to the public other than
         as a result of unauthorized disclosure thereof by the Receiving
         Party;

         (b) which is lawfully received by the Receiving Party on a
         nonconfidential basis from a Third Party that is not itself under
         any obligation of confidentiality or nondisclosure to the Disclosing
         Party or any other Person with respect to such information;

         (c) which by written evidence can be shown by the Receiving Party to
         have been independently developed by or for the Receiving Party; or

         (d) which the Receiving Party establishes by competent proof was in its
         possession at the time of disclosure by the other Party and was not
         acquired, directly or indirectly from the other Party under any
         obligation of confidentiality.

All information, data and other materials disclosed by one Party to the other
pursuant to the Confidentiality Agreement, dated May 2, 1999, shall be deemed
to have been disclosed by the disclosing Party under this Agreement.

13.2     NONDISCLOSURE OF CONFIDENTIAL INFORMATION. The Receiving Party shall
use Confidential Information solely for the purposes of this Agreement and
shall not disclose or disseminate any Confidential Information to any Third
Party at any time without the Disclosing Party's prior written consent,
except for disclosure to those of its directors, officers, employees,
accountants, attorneys, advisers, permitted sublicensees, agents and
representatives whose duties reasonably require them to have access to such
Confidential Information, provided that such directors, officers, employees,
accountants, attorneys, advisers, agents and representatives are required to
use the Confidential Information solely for purposes of this Agreement and
maintain the confidentiality of such Confidential Information to the same
extent as if they were Parties hereto.

13.3     EXCEPTION. The foregoing confidentiality and nondisclosure
obligations shall not apply to information which is required to be disclosed
by law or by regulation; provided, that (i) the Receiving Party gives the
Disclosing Party reasonable advance notice of the disclosure, to the extent
reasonably practicable and legally permissible; (ii) the Receiving Party uses
reasonable efforts to resist disclosing the Confidential Information; (iii)
the Receiving Party reasonably cooperates with the Disclosing Party on
request to obtain a protective order or otherwise limit the disclosure; and
(iv) upon the reasonable request of the Disclosing Party, the Receiving Party
shall provide a letter from its counsel confirming that the Confidential
Information is, in fact, required to be disclosed.

13.4     INJUNCTIVE RELIEF. The Parties acknowledge that either Party's
breach of this Article 13 may cause the other Party irreparable injury for
which it would not have an adequate remedy at law. In the event of a breach,
the non-breaching Party shall be entitled to injunctive relief in addition to
any other remedies it may have at law or in equity.


                                                                          48

<PAGE>


13.5     SURVIVAL. The confidentiality and nondisclosure obligations of this
Article 13 shall survive the expiration or termination of this Agreement and
remain in effect for a period of [_________] years following the expiration
or termination of this Agreement.

ARTICLE 14:        TRADEMARKS

14.1     SUPERGEN TRADEMARKS. Subject to approval by the U.S. Marketing
Board, SuperGen shall be solely responsible for the selection, filing,
registration and maintenance of the SuperGen Trademark(s) in the U.S.
Territory. SuperGen shall keep Abbott fully apprised with respect to its
trademark activities and shall consult with Abbott regarding the selection of
the SuperGen Trademark(s) for the U.S. Territory. All reasonable
out-of-pocket costs and expenses associated with the selection, filing,
registration and maintenance of the trademarks for the Product in the U.S.
Territory shall be [__________________________].

14.2     LIMITED TRADEMARK LICENSE. Subject to the terms of this Agreement,
SuperGen hereby grants to Abbott (i) a nonexclusive limited license in the
Territories to use SuperGen's name and logo, and (ii) a coexclusive limited
license in the U.S. Territory to use the SuperGen Trademark(s), in each
instance solely for the purpose of promoting distributing and selling the
Product in the Territories in accordance with the terms and conditions of
this Agreement. Abbott shall promote the Product in the U.S. Territory only
under the SuperGen Trademark(s).

14.3     ABBOTT TRADEMARK(S). Abbott shall be solely responsible for the
selection, filing, registration and maintenance of the Abbott Trademark(s) in
the International Territory. Abbott shall keep SuperGen fully apprised with
respect to the its trademark activities and shall consult with SuperGen
regarding the selection of the Abbott Trademark(s) for the International
Territory. Abbott shall control all final decisions regarding the Abbott
Trademarks.

14.4     LIMITED TRADEMARK LICENSE. In the event that Abbott's rights under
this Agreement shall cease, and upon request by SuperGen, Abbott shall grant
to SuperGen an exclusive limited license in the International Territory to
use the Abbott Trademark(s), solely for the purpose of promoting distributing
and selling the Product in the International Territory. SuperGen shall pay
Abbott a trademark royalty of [_____________] of SuperGen's Net Sales of the
Product in the International Territory, subject to the terms of a separate
trademark license to be entered into by the Parties.

14.5     USE OF TRADE NAMES AND LOGOS. Each Party recognizes that the name
and logo of each of the Parties represents a valuable asset of such entity
and that substantial recognition and goodwill are associated with each
Party's name, and logo. Each Party hereby agrees that, without prior written
authorization of the other Party, it shall not use the name or logo of the
other Party for any purpose other than the promotion, distribution and sale
of the Product solely to the extent required to fulfill its obligations under
this Agreement. In addition, SuperGen shall only use the Abbott name and logo
in the form, manner and logotype approved in writing by Abbott, and Abbott
shall only use the


                                                                          49

<PAGE>


SuperGen name and logo and the SuperGen Trademarks in the form, manner and
logotype approved in writing by SuperGen. Except for the limited license
granted in Section 14.2 above, nothing in this Agreement shall be construed
as an assignment by SuperGen to Abbott of any right, title or interest in or
to the SuperGen name or logo or the SuperGen Trademarks, or an assignment by
Abbott to SuperGen of any right, title or interest in or to the Abbott name
or logo or the Abbott Trademarks; it being understood that all right, title
and interest (including the goodwill associated therewith) in and to the
SuperGen name and logo and the SuperGen Trademark(s) is expressly reserved by
SuperGen, and all right, title and interest (including the goodwill
associated therewith) in and to the Abbott name and logo and the Abbott
Trademarks is expressly reserved by Abbott.

14.6     INJUNCTIVE RELIEF. Each Party acknowledges that a violation of this
Article 14 would cause irreparable harm to the other Party for which no
adequate remedy at law exists, and each Party therefore agrees that, in
addition to any other remedies available, and notwithstanding any other
provision in this Agreement, the aggrieved Party shall be entitled to
injunctive relief to enforce the terms of this Article 14. If either Party
prevails in any such action, it shall be entitled to recover all costs and
expenses, including reasonable attorney's and other professional fees and
expenses incurred because of any legal action arising in relation to this
Article 14.

14.7     NOTIFICATION OF INFRINGEMENT AND ENFORCEMENT. Each Party shall
notify the other Party of any infringement or misuse of SuperGen's
Trademark(s) of which such Party becomes aware. SuperGen shall be solely
responsible to prosecute any infringement of the SuperGen Trademark(s). Any
damage award or settlement, in excess of SuperGen's cost and expenses of
enforcement, shall be shared equally between the Parties.

ARTICLE 15:  INDEMNIFICATION

15.1     INDEMNIFICATION BY SUPERGEN. Except as may be otherwise provided
herein, SuperGen shall defend, indemnify and hold Abbott, all of its
directors, officers and employees, and Abbott Sales Representatives
(collectively the "Abbott Indemnitees") harmless from and against all Losses
incurred in connection with any Third Party suits, claims or causes of action
arising out of or resulting from:

         (a) SuperGen's breach of any representation, warranty, covenant, or
         obligation provided for in this Agreement;

         (b) an infringement claim arising from Abbott's use of the SuperGen
         name or logo or a SuperGen Trademark in connection with the promotion
         or sale of the Products, provided Abbott's use is in compliance with
         the terms of this Agreement;

         (c) the negligence, recklessness or willful misconduct of SuperGen and
         its directors, officers or employees or SuperGen Sales Representatives,
         including, but not limited to, product liability claims arising out of
         off-label promotions by


                                                                          50

<PAGE>


         SuperGen, its directors, officers, employees or SuperGen Sales
         Representatives; or

         (d) any patent infringement claim arising from the manufacture,
         importation, use or sale of the Product.


Provided, however, that SuperGen shall not be required to indemnify the
Abbott Indemnitees to the extent that any Losses arise out of or result from:
[__________________________].

15.2     INDEMNIFICATION BY ABBOTT . Except as may be otherwise provided
herein, Abbott shall defend, indemnify and hold SuperGen, its directors,
officers and employees, and SuperGen Sales Representatives (collectively the
"SuperGen Indemnitees") harmless from and against all Losses incurred in
connection with any Third Party suits, claims or causes of action arising out
of or resulting from:

         (a) Abbott's breach of any representation, warranty, covenant, or
         obligation provided for in this Agreement;

         (b) an infringement claim arising from SuperGen's use of the Abbott
         name or logo in connection with the promotion or sale of the Product,
         provided SuperGen's use is in compliance with the terms of this
         Agreement;

         (c) the negligence, recklessness or willful misconduct of Abbott, its
         directors, officers or employees or Abbott Sales Representatives,
         including, but not limited to, product liability claims arising out of
         off-label promotions by Abbott, its Affiliates, their directors,
         officers or employees, or Abbott Sales Representatives; or

         (d) any patent infringement claim arising from Abbott's or its
         Affiliates' or permitted sublicensee's (A) utilization of process
         technology for the manufacture of the Product which has not been
         approved by SuperGen or (B) continued Promotion in a country after
         receipt of notice from SuperGen indicating that the sale or Promotion
         of such Product in such country should be terminated because such
         further sale or Promotion would constitute willful infringement of a
         valid and issued patent in such country.



                                                                          51
<PAGE>


Provided, however, that Abbott shall not be required to indemnify the
SuperGen Indemnitees to the extent that any Losses arise out of or result
from:  [__________________________].

15.3     INDEMNIFICATION PROCEDURE. Any Abbott Indemnitee or SuperGen
Indemnitee, as the case may be, shall notify SuperGen or Abbott (the
"Indemnifying Party") promptly in writing of an indemnifiable claim or cause
of action under Article 15.1 or 15.2 upon receiving notice or being informed
of the existence thereof. The Indemnifying Party shall assume, at its cost
and expense, the sole defense of such claim or cause of action through
counsel selected by the Indemnifying Party and reasonably acceptable to the
other Party. The Indemnifying Party shall maintain control of such defense,
including any decision as to settlement; provided that:

         (a) the Indemnifying Party shall not enter into any binding settlement,
         consent to any judgment, or otherwise resolve any such claim or action
         pursuant to which the other Party would be obligated to take or refrain
         from taking any action (including but not limited to being enjoined
         from making, using, importing, selling or offering to sell the Product)
         or to make any payments or admissions, without the other Party's prior
         written consent; and

         (b) in the event that the Indemnifying Party does not diligently defend
         such claim or cause of action on a timely basis, then, without
         prejudice to any other rights and remedies available to the other Party
         under this Agreement, the other Party may take over such defense with
         counsel of its choosing at the Indemnifying Party's cost and expense.
         The other Party may, at its option and expense, participate in the
         Indemnifying Party's defense, and if the other Party so participates,
         the Parties shall cooperate with one another in such defense. The
         Indemnifying Party shall bear the total costs of any court award or
         settlement of such claim or cause of action and all other costs, fees
         and expenses related to the resolution thereof (including reasonable
         attorney's and other professional fees and expenses except for
         attorneys' fees for which the other Party is responsible in the event
         that the other Party participates in the Indemnifying Party's defense
         of such claim or cause of action). The indemnification obligations
         herein shall apply on a first dollar basis without limitation or
         reduction due to any deductible or self-insured retention which
         SuperGen or Abbott respectively may have under their respective
         insurance coverage.

15.4     PRODUCT LIABILITY. In the event of a product liability claim with
respect to the Product which is not covered by the foregoing indemnity
provisions in this Article 15, the Parties shall [__________________________].
Abbott shall maintain control of the defense of any such product liability
claim with respect to the International Territory and SuperGen shall maintain
control of the defense of any such product liability claim with respect to
the U.S. Territory.


                                                                          52

<PAGE>


ARTICLE 16:        TERM AND TERMINATION

16.1     TERM. The term of this Agreement shall commence on the Effective
Date and, unless terminated sooner in accordance with this Article 16:

         (a) for the U.S. Territory, the term of this Agreement shall expire
         upon  [__________________________] upon written
         agreement made no later than thirty (30) days prior to the end of the
         original term and any succeeding extensions thereof; and

         (b) for the International Territory, the term of this Agreement shall
         expire upon [__________________________].

16.2     Upon expiration of this Agreement in the International Territory,
Abbott shall have a fully-paid up, irrevocable license to use and sell the
Product in the International Territory under the SuperGen Technology.

16.3     TERMINATION FOR MATERIAL BREACH. Either party may, in addition to
any other remedies available to it by law or in equity, terminate this
Agreement, upon sixty (60) days' written notice in the event that the
other party breaches a material provision of this Agreement and fails to
cure such breach within sixty (60) days of notice of the breach.
[__________________________] .

16.4     TERMINATION FOR NON-APPROVAL OR LACK OF COMMERCIAL VIABILITY.

                                                                           53
<PAGE>


         (a) Commencing  [_______________________], Abbott may terminate this
         Agreement at any time, on a Territory-by-Territory basis or in
         whole, upon thirty (30) days written notice to SuperGen that
         [__________________________].

         (b) Commencing [__________________________], Abbott may terminate this
         Agreement at any time, on a Territory-by-Territory basis or in whole,
         upon thirty (30) days written notice to SuperGen in the event that
         [__________________________].

16.5     BANKRUPTCY OR INSOLVENCY. Either Party may, in addition to any other
         remedies available to it by law or in equity, terminate this
         Agreement, upon thirty (30) days' written notice to the other Party
         in the event the other Party shall have become insolvent or
         bankrupt, or shall have made an assignment for the benefit of its
         creditors, or there shall have been appointed a trustee or receiver
         of the other Party or for all or a substantial Party of its
         property, or any case or proceeding shall have been commenced or
         other action taken by or against the other Party in bankruptcy or
         seeking reorganization, liquidation, dissolution, winding-up,
         arrangement, composition or readjustment of its debts or any relief
         under any bankruptcy, insolvency, reorganization or other similar
         act or law of any jurisdiction now or hereinafter in effect (an
         "Insolvency Event"). However, in the event that SuperGen
         experiences an Insolvency Event and  [__________________________].
         All rights and licenses granted hereunder are for all purposes of
         this Agreement licenses of rights to intellectual property and may
         not be terminated upon an Insolvency Event without the express
         agreement of the Party that is not insolvent. Notwithstanding
         anything to the contrary in this Agreement, in the event that
         SuperGen experiences an Insolvency Event and
         [__________________________].

16.6     SERIOUS EVENTS. Should there occur serious and unexpected events
         which, from a reasonable pharmaceutical company's point of view,
         would make it impossible or impracticable to pursue the
         commercialization of the Product, including but not limited to
         [__________________________], either Party may terminate this
         Agreement upon thirty (30) days' written notice.

                                                                          54

<PAGE>



16.7     CHANGE OF CONTROL OR OWNERSHIP. Either Party may terminate this
Agreement upon thirty (30) days' written notice if the ownership or control
of at least  [________] of the assets or voting securities of the other Party
are transferred and, in the non-changing Party's reasonable judgement, the
other Party's new owner or controlling entity is a competitor of the
non-changing Party in the field of oncology. In addition to this right, if
[___________].

16.8     EFFECT OF TERMINATION.

         (a) Any termination with respect to a particular Territory shall only
         result in the termination of rights and obligations hereunder as they
         relate to that Territory.

         (b) Expiration or termination of this Agreement (on a
         Territory-by-Territory basis or as a whole) shall not release any Party
         from liability accrued under this Agreement prior to such expiration or
         termination, nor preclude either Party from pursuing any rights or
         remedies accrued prior to such expiration or termination or accrued at
         law or in equity with respect to any breach of this Agreement.

         (c) Termination of this Agreement (on a Territory-by-Territory basis or
         as a whole) in good faith by any Party shall not in itself constitute
         any basis for claims for compensation, damages (direct, indirect or
         consequential) or any other remedy in law or at equity by the other
         Party, including but not limited to any claim for lost sales, profits,
         goodwill or business opportunity or any claim on account of
         expenditures, investments or commitments made in connection with the
         Product or the Agreement.

         (d) If this Agreement is terminated under this Article 16, the
         terminating Party shall have the right to terminate each or any of (i)
         the U.S. Distribution Agreement; (ii) the Stock Purchase Agreement, to
         the extent that there are any continuing obligations thereunder; and
         (iii) the Stockholder Rights Agreement (provided that the provisions
         contained in sections 3 and 5 thereof shall survive such termination)
         upon thirty (30) days written notice, in its sole discretion and in

                                                                          55

<PAGE>


         addition to any other rights and remedies which may be available at law
         or in equity or under the terms of the SuperGen-Abbott Agreements set
         forth above.

16.9     PHASE-OUT PERIOD. Within thirty (30) days of the expiration or
termination of this Agreement under this Article 16 (on a
Territory-by-Territory basis or as a whole), [_________________________].
Upon expiration or termination of this Agreement under this Article 16 (on a
Territory-by-Territory basis or as a whole), [_______________________].
During such Phase-Out Period, Abbott may continue to fill all outstanding
orders for the Product and Abbott shall refer any new orders for the Product
to SuperGen. During the Phase-Out Period, Abbott shall not be required to
perform any Details for the Product and Abbott shall receive its share of the
U.S. Product Profits, unless Abbott was terminated hereunder for its material
breach of this Agreement. Abbott shall promptly return all Promotional
Materials and Sample Packs for the terminated Product to SuperGen and shall
delete the Product from its catalogues and price lists as soon as reasonably
practical. In the event of any problems relating to the Product or customer
relations issue during the Phase-Out Period, Abbott shall cooperate fully
with SuperGen to ensure customer satisfaction and compliance with all
applicable laws and regulations.

16.10    POST-TERMINATION ORDERS. After expiration or termination of this
Agreement (on a Territory-by-Territory basis or as a whole) the placement of
any order for Product by Abbott to SuperGen, and the acceptance of any order
from, or sale of any Product to Abbott by SuperGen, shall not be construed as
a renewal or extension of this Agreement nor as a waiver or reversal of
termination of this Agreement.

16.11    SURVIVAL. Other than obligations which have accrued and are
outstanding as of the date of any expiration or termination of this Agreement
(on a Territory-by-Territory basis or as a whole), all rights granted and
obligations undertaken by the Parties hereunder shall terminate immediately
upon the termination or expiration of this Agreement, subject to Article 16.2
above and except for the following which shall survive according to their
terms:

         (a) The limitations on liability of Article 12;

         (b) The confidentiality and nondisclosure obligations of Article 13;

         (c) The indemnification obligations of Article 15 with respect to
             events occurring prior to termination or expiration of the
             Agreement;

         (d) The insurance obligations of Article 18; and

         (e) The provisions of Sections 4.2(f) (as well as Section 4.3 as its
             relates to


                                                                          56

<PAGE>


             Section 4.2(f) with respect to the International Territory),
             7.5, 7.8, 16.4 through 16.8, 20.12, 20.3 and Section 20.11.

16.12    NONEXCLUSIVE RIGHTS AND REMEDIES. Except as otherwise set forth in
this Agreement, all rights and remedies of the Parties provided under this
Agreement are not exclusive and are in addition to any other rights and
remedies provided by law or under this Agreement.

16.13    CONDITIONS TO EFFECTIVENESS. The Effective Date shall be the date on
which the following conditions have been satisfied, as confirmed by both
Parties in writing:

         (a) No order, statute, rule, regulation, executive order, injunction,
         stay, decree or restraining order shall have been enacted, entered,
         promulgated or enforced by any court of competent jurisdiction or
         governmental or regulatory authority that prohibits the execution,
         delivery or performance of any of the SuperGen-Abbott Agreements, and
         no proceeding by any governmental or regulatory authority or
         instrumentality shall be pending or threatened, which seeks to prohibit
         or declare illegal the execution, delivery or performance of any of the
         SuperGen-Abbott Agreements;

         (b) The "First Tranche Closing" as such term is defined in the Stock
         Purchase Agreement shall have occurred or shall be occurring
         simultaneously;

         (c) All corporate and other proceedings taken or to be taken in
         conjunction with the transactions contemplated in the SuperGen-Abbott
         Agreements, and all documents incident thereto, shall be reasonably
         satisfactory in form and substance to Abbott and to SuperGen,
         respectively;

         (d) SuperGen shall have obtained the consents and/ or approvals
         identified in Article 11.2 and Abbott shall have received from SuperGen
         a copy of the executed consents and/ or approvals identified in Article
         11.2 and a certificate signed by an appropriate officer of SuperGen as
         to SuperGen's compliance with the conditions set forth in this Section
         16.9.

         (e) The representations and warranties of SuperGen contained herein and
         in the other SuperGen-Abbott Agreements shall be true and correct at
         and as of the Effective Date as though restated on and as of the
         Effective Date;

         (f) SuperGen shall have received from Abbott a certificate signed by an
         appropriate officer as to Abbott's compliance with this Section 16.13;
         and

         (g) Each of the Parties shall have approved the [_____________] in
         writing.

16.14    NON-FULFILLMENT OF CONDITIONS. The non-fulfillment of any of the
conditions described in Article 16.14 above (whether or not the Effective
Date occurs) shall not result in any liability to any Party unless such
non-fulfillment is a result of a breach of

                                                                          57

<PAGE>


this Agreement or any of the other SuperGen-Abbott Agreements by such Party.

ARTICLE 17:       TRANSFER OF TECHNOLOGY

17.1     TRANSFER BY SUPERGEN. Within thirty (30) days following the
Effective Date and as far as it has not previously done so, SuperGen shall
supply Abbott with all SuperGen Technology necessary for the manufacture, use
and sale of the Product in SuperGen's possession or control (including but
not limited to technical information reasonably required by Abbott for
regulatory, marketing and sales purposes under this Agreement). With respect
to any SuperGen Technology subsequently developed or obtained by SuperGen
during the term of this Agreement, such disclosure will be made to Abbott at
least on a monthly basis or sooner, if practicable.

17.2     TECHNICAL ASSISTANCE. Solely for the purpose of enabling Abbott to
exercise its rights pursuant to Article 8.5 above, SuperGen shall, upon
request by Abbott, provide Abbott with reasonable cooperation and assistance,
consistent with the other provisions hereof, in connection with the transfer
of SuperGen Technology. Such assistance may include, but is not limited to,
development of the formulations of the Product; procurement of supplies and
raw materials; initial development and production batch manufacturing runs;
process, specification and analytical methodology design and improvement;
and, in general, such other reasonable assistance as may contribute to the
efficient application by Abbott of the Product Technology. In this regard,
SuperGen agrees to make appropriate employees of SuperGen reasonably
available to assist Abbott, and SuperGen agrees to provide reasonable numbers
of appropriate Abbott personnel with access during normal business hours to
the appropriate personnel and operations of SuperGen for such periods of time
as may be reasonable in order to familiarize Abbott personnel with the
SuperGen Technology as applied by SuperGen. At Abbott's reasonable request,
such assistance shall be furnished at Abbott's or its subcontractors' or
permitted sublicensees' facilities in the Territories, subject to a mutually
agreed upon schedule. Such technical assistance shall include but not be
limited to the following:

         (a) SuperGen shall: (A) provide Abbott with a written right of
         reference to any and all Drug Master File(s) or counterparts thereof in
         any countries of the Territories ("DMF") relating to the manufacture of
         the Compounds existing during the term of this Agreement; and (B)
         reasonably cooperate with Abbott in obtaining access to and letters of
         authorization to refer to the DMF's of SuperGen's subcontractors or
         Third Party manufacturer(s) which are, or will be, supplying any
         Compound or Product; and

         (b) Within forty five (45) days after the Effective Date, SuperGen
         shall provide Abbott with copies of all documentation in SuperGen's
         possession or control, including all correspondence between SuperGen
         and its subcontractors and/ or Third Party manufacturer(s), regarding
         the manufacture of the Compound and the Product which would be
         necessary or useful to assist Abbott in the commercial production of
         the Compound or Product.


                                                                          58

<PAGE>


         (c) During the period prior to the  [__________________________], (i)
         SuperGen shall provide up to  [__________________________] and (ii)
         subsequent to such  [__________________________]. Technical
         assistance furnished pursuant to this Article 17.2(b) shall
         continue only until  [__________________________].

17.3     LANGUAGE OF DISCLOSURES. All disclosure pursuant to this Agreement
will be in English.

ARTICLE 18:        INSURANCE

Beginning on the Effective Date and until the date which is one day prior to the
date of initial Launch, SuperGen shall maintain product liability insurance with
an A.M. Best Company rating of at least A+ with a minimum annual amount of:
[__________________________].  Beginning on the date of initial Launch and for
a period of five (5) years after termination of this Agreement, SuperGen shall
maintain product liability insurance with an A.M. Best Company rating of at
least A+, with minimum annual amounts per occurrence and in the aggregate which
are adequate to Abbott's reasonable satisfaction. Upon Abbott's request,
SuperGen shall deliver to Abbott a certificate of insurance evidencing such
insurance and stating that the policy will not be canceled or modified without
at least thirty (30) days prior written notice to Abbott. Abbott shall be named
as an additional insured party under any such insurance policies.

ARTICLE 19:        FORCE MAJEURE

If any circumstance beyond the reasonable control of either Party occurs which
delays or renders impossible the performance of certain of that Party's
obligations under this Agreement on the dates herein provided ("Force Majeure"),
such obligations shall be postponed for such time as such performance
necessarily has had to be suspended or delayed on account thereof, provided such
Party shall notify the other Party in writing as soon as practicable, but in no
event more than ten (10) business days after the occurrence of such event of
Force Majeure, which notice shall reasonably attempt to identify such
obligations under this Agreement and the extent to which performance thereof
will be affected. In such event, the Parties shall meet promptly to determine an
equitable solution to the effects of any such event, provided that such Party
who fails because of an event of Force Majeure to perform its obligations
hereunder shall upon the cessation of the Force Majeure event take all
reasonable steps within its power to resume with the least possible delay
compliance with its obligations. Events of Force Majeure shall include, without
limitation, war, revolution, invasion. insurrection, riots, mob violence.
sabotage or other civil disorders, acts of God, limitations imposed by exchange
control regulations or


                                                                          59

<PAGE>



foreign investment regulations or similar regulations, laws, regulations or
rules of any government or governmental agency, any inordinate and
unanticipated delays in the regulatory review or governmental approval
process that are within the sole control of such government or governmental
agency, any delay or failure in manufacture, production or supply by Third
Parties of any goods or services, any withdrawal or recall of a Product at
the direction of any governmental authority and any failure of a computer
system.

ARTICLE 20:        MISCELLANEOUS

20.1     RELATIONSHIP OF THE PARTIES. Each of the Parties shall be furnishing
its services hereunder as an independent contractor, and nothing herein shall
create any association, partnership or joint venture between the Parties or
any employer-employee or agency relationship. No agent, employee or servant
of either Party shall be or shall be deemed to be the employee, agent or
servant of the other Party, and each Party shall be solely and entirely
responsible for its acts and the acts of its employees.

20.2     RELATIONSHIP WITH AFFILIATES. Unless the context otherwise indicates
or as set forth in this Article 20.2, (i) any reference to a Party herein
shall include the Affiliates of such Party , with the following exceptions:
(A) the appointment of exclusive distributorship pursuant to Article 2.1; (B)
the grant of right to co-promote the Product pursuant to Article 2.2; (C) the
grant of license to sell the Product pursuant to Article 2.5; (D) the grant
of right with respect to additional products pursuant to Article 2.6; (E) the
right of first refusal to acquire SuperGen pursuant to Article 2.7; and (F)
the right with respect to patent prosecution and infringement pursuant to
Article 9; and (ii) each Party may utilize the services of its Affiliates to
perform services, activities and/or obligations permitted or required under
this Agreement to the same extent as if such Affiliate were a Party to this
Agreement; provided that any such services, activities or obligations under
this Agreement permitted or required to be performed by such Party relating
to the U.S. Territory will be performed only by such Party or a wholly-owned
U.S. subsidiary of such Party. Any Affiliates so utilized shall be subject to
all the terms and conditions applicable to such Party under this Agreement,
including but not limited to provisions establishing standards for
performance. With respect to the International Territory, Abbott may use its
Affiliates as set forth in this Section 20.2; provided that Abbott shall make
all payments required and provide all reports required under this Agreement.
The use of any Affiliates as set forth in this Section 20.2 shall in no way
relieve the applicable Party of any of its obligations or liabilities
hereunder and each Party shall be liable for the actions of its Affiliates
under this Agreement and the indemnification provisions of Article 15 shall
apply with respect to all actions of a Party's Affiliates under this
Agreement.

20.3     DISPUTE RESOLUTION. The Parties agree that any dispute that arises
in connection with this Agreement shall first be presented to the respective
presidents of SuperGen and Abbott Laboratories Hospital Products Division and
Abbott Laboratories International Division, or their designees, for
resolution. If no resolution is reached, then such dispute shall be resolved
by binding Alternative Dispute Resolution ("ADR") in the manner


                                                                          60

<PAGE>

described in Exhibit 20.3.

20.4  COUNTERPARTS. The Agreement may be executed simultaneously in any
number of counterparts and may be executed by facsimile. All counterparts
shall collectively constitute one and the same Agreement.

20.5  NOTICES. In any case where any notice or other communication is
required or permitted to be given hereunder, such notice or communication
shall be in writing, and sent by overnight express, facsimile or registered
or certified mail (with return receipt requested) and shall be sent to the
following address (or such other address as either Party may designate from
time to time in writing):

If to SuperGen:   SuperGen, Inc.
                  Two Annabel Lane, Suite 220
                  San Ramon, CA  94583
                  Telefax:   (925) 327-7347
                  Attention: Dr. Joe Rubinfeld
                             Chief Executive Officer and President

                  Copy to: Wilson Sonsini Goodrich & Rosati
                           650 Page Mill Road
                           Palo Alto, CA  94304-1050

If to Abbott:     Abbott Laboratories
                  200 Abbott Park Road
                  Abbott Park, IL 60064
                  Telefax: (847) 937-2927 / (847) 935-3260
                  Attention:        Senior Vice President, Hospital Products
                                    Division, and Senior Vice President,
                                    International Operations

                  Copy to: General Counsel
                           Abbott Laboratories
                           Dept. 364; Bldg. AP6D
                           100 Abbott Park Road
                           Abbott Park, IL 60064
                           Telefax: (847) 938-6277

20.6  BINDING EFFECT; ASSIGNMENT. This Agreement may not be assigned, in
whole or in part, by either Party without the prior written consent of the
other Party, and any attempted assignment without such consent shall be null
and void; provided that no prior written consent shall be required in the
event that a Third Party acquires substantially all of the assets or
outstanding shares of, or merges with, the assigning Party, but only so long
as [__________________________].  No


                                                                             61

<PAGE>


assignment of this Agreement or of any rights hereunder shall relieve the
assigning Party of any of its obligations or liability hereunder. This
Agreement shall inure to the benefit of and be binding upon each of the
Parties hereto and their respective successors and permitted assigns.

20.7  ENTIRE AGREEMENT. The terms and conditions contained herein and in the
other SuperGen-Abbott Agreements constitute the entire agreement between the
Parties relating to the subject matter of hereof and thereof and shall
supersede all previous communications and/ or agreements between the Parties
with respect to the subject matter hereof and thereof, respectively. Neither
Party has entered into this Agreement in reliance upon any representation,
warranty, covenant or undertaking of the other Party that is not set out or
referred to in this Agreement.

20.8  AMENDMENT. The Agreement may be varied, amended or extended only by the
written agreement of the Parties through their duly authorized officers or
representatives, specifically referring to this Agreement.

20.9  SEVERABILITY. In case any one or more of the provisions contained
herein shall, for any reason be held to be invalid, illegal or unenforceable
in any respect, such invalidity, illegality or unenforceability shall not
affect any other provision of this Agreement, but this Agreement shall be
construed as if such invalid, illegal or unenforceable provision or
provisions had never been contained herein unless the deletion of such
provision or provisions would result in such a material change as to cause
completion of the transactions contemplated herein to be impossible and
provided that the performance required by this Agreement with such clause
deleted remains substantially consistent with the intent of the Parties.

20.10  COMPANY EMPLOYEES. Each Party shall not directly or indirectly solicit
for employment, any employee of the other Party who has been directly
involved in the performance of this Agreement during the term of this
Agreement and for [__________________________]. It shall not be a violation
of this provision if any employee responds to a Party's general advertisement
of an open position.

20.11  PUBLICITY. Except as otherwise provided herein, each Party shall
maintain the confidentiality of all provisions of this Agreement and this
Agreement itself and, without the prior written consent of both Parties,
neither Party shall make any press release or other public announcement of or
otherwise disclose to any Third Party this Agreement or any of its provisions
or anything relating to the Compound, the Product or the Finished Product,
except for: (i) for disclosure to those of its directors, officers,
employees, accountants, attorneys, advisers and agents whose duties
reasonably require them to have access to the Agreement, provided that such
directors, officers, employees, accountants, attorneys, advisers, and agents
are required to maintain the confidentiality of the Agreement to the same
extent as if they were Parties hereto, (ii) such disclosures as may be
required by applicable laws and regulations, in which case the disclosing
Party shall provide the nondisclosing Party with at least five (5) business
days prior written notice of such disclosure so that the nondisclosing Party
shall have the opportunity if it so desires

                                                                             62

<PAGE>


to seek a protective order or other appropriate remedy and, in connection
with any such required disclosure, the disclosing Party shall use reasonable
efforts to obtain confidential treatment for such disclosure and/ or to
prevent or modify such disclosure as may be requested by the nondisclosing
Party (to the extent permitted by applicable law and regulation); and (iii)
such disclosure as contained in the joint press release which is attached to
this Agreement as Exhibit 20.11.

20.12  APPLICABLE LAW. The Agreement shall be governed by the laws of the
State of Illinois applicable to contracts made and to be performed entirely
within such jurisdiction and without giving effect to its choice or conflict
of laws rules or principles. If any action at law or in equity is necessary
to enforce or interpret the terms of this Agreement, the prevailing Party
shall be entitled to reasonable attorneys' fees, costs and necessary
disbursements, in addition to any other relief to which the Party may be
entitled.

20.13  MILLENNIAL COMPLIANCE. Each Party hereby covenants and agrees that it
will use its reasonable efforts to ensure that there will be no failure or
erroneous receipt, storage, processing or production of data as a consequence
of the inability to receive, store, process or output date information
regardless of the date(s) utilized (including, without limitation, relating
to the change of century) in any and all computer software, computer
hardware, automation systems or other devices owned, licensed or otherwise
used by such Party, its permitted sublicensees or suppliers that would result
in the inability of such Party to either (i) comply with its obligations
hereunder with respect to any Confidential Information or any other data or
information of other Party, or (ii) successfully perform its obligations
hereunder. At either Party's request, the other Party agrees to disclose in
reasonable detail its millennial compliance plan and procedures, including
but not limited to the applicable testing results concerning its hardware and
software systems.

20.14  HEADINGS. The descriptive headings contained in this Agreement are
included for convenience of reference only and shall not affect the meaning
or interpretation of this Agreement.

20.15  INTERPRETATION.

         (a) Wherever any provision of this Agreement uses the term "including"
         (or "includes"), such term shall be deemed to mean "including without
         limitation" and "including but not limited to" (or "includes without
         limitation" and "includes but is not limited to") regardless of whether
         the words "without limitation" or "but not limited to" actually follow
         the term "including" (or "includes").

         (b) Wherever any provision of this Agreement provides that a Party's
         consent shall not be unreasonably withheld, such provision shall be
         deemed to provide that such consent shall in addition not be
         unreasonably delayed.

         (c) The recitals set forth at the start of this Agreement, along
         with the Exhibits to this Agreement, and the terms and conditions
         incorporated in such recitals and Exhibits shall be deemed integral
         parts of this Agreement and all references in

                                                                       63

<PAGE>


         this Agreement to this  Agreement shall encompass such recitals and
         Exhibits and the terms and conditions incorporated in such recitals
         and Exhibits.

         (d) In the event of any conflict between the terms and conditions of
         this Agreement and any terms and conditions that may be set forth on
         any order, invoice, verbal agreement or otherwise, the terms and
         conditions of this Agreement shall govern.

         (e) Unless otherwise explicitly stated, in the event of any conflict
         between the terms of this Agreement and the terms and conditions of any
         of the Exhibits hereto, the terms of this Agreement shall prevail.

         (f) The Agreement shall be construed as if both Parties drafted it
         jointly, and shall not be construed against either Party as principal
         drafter.

         (g) Unless otherwise provided, all references to Sections, Articles and
         Exhibits this Agreement are to Sections, Articles and Exhibits of and
         to this Agreement.

20.16    NO WAIVER OF RIGHTS. No failure or delay on the part of either Party
in the exercise of any power or right hereunder shall operate as a waiver
thereof. No single or partial exercise of any right or power hereunder shall
operate as a waiver of such right or of any other right or power. The waiver
by either Party of a breach of any provision of this Agreement shall not
operate or be construed as a waiver of any other or subsequent breach
hereunder.

IN WITNESS WHEREOF, the Parties hereto have caused this Agreement to be
executed by their duly authorized officers as of the date first written above.

<TABLE>

<S>                                       <C>
SUPERGEN, INC.                              ABBOTT LABORATORIES

By:    /s/ Dr. Joseph Rubinfeld             By:    /s/ Richard A. Gonzalez

Name:  Dr. Joseph Rubinfeld                 Name:  Richard A. Gonzalez

Title: Pres.-CEO                            Title: President, HPD


                                            By:    /s/ William G. Dempsey

                                            Name:  William G. Dempsey

                                            Title: President, Abbott
                                                   International

</TABLE>



                                                                             64

<PAGE>

                                                                    EXHIBIT 1.8

                               EXPENSE DEFINITIONS

 [__________________________]

                                                                              65

<PAGE>

 [__________________________]


                                                                              66

<PAGE>

 [__________________________]


                                                                              67


<PAGE>

                                                                    Exhibit 1.23

                      Rubitecan (RFS-2000) Patent Portfolio

To the best of SuperGen's knowledge the patents and patent applications listed
below relate to Rubitecan as of November 4, 1999

 [__________________________]



                                                                            68

<PAGE>


[__________________________]



                                                                            69

<PAGE>


[__________________________]



                                                                             70

<PAGE>


[__________________________]



                                                                             71



<PAGE>

                                                           EXHIBIT 1.44


                                 SPECIFICATIONS


[__________________________]


<TABLE>
<CAPTION>
- -----------------------------------------------------------------------------
[__________________]
- -----------------------------------------------------------------------------
[__________________]
- -----------------------------------------------------------------------------
<S>              <C>                  <C>                    <C>
- -----------------------------------------------------------------------------
[__________________]
- -----------------------------------------------------------------------------
[__________________]
- -----------------------------------------------------------------------------
[__________________]
- -----------------------------------------------------------------------------
[__________________]
- -----------------------------------------------------------------------------
[__________________]
- -----------------------------------------------------------------------------
</TABLE>

[__________________]

                                                                           72
<PAGE>

                                                                EXHIBIT 3.1



                              Clinical Development


 [_________________]



                                                                          73




<PAGE>

                                                              EXHIBIT 4.4 (e)



                                Development Plan

[___________________]

                                                                          74



<PAGE>

                                                                    EXHIBIT 5.1





                        Sales Milestone Payments Example

[__________________]

<TABLE>
<CAPTION>

- --------------------------- --------- ---------- --------- --------- ---------- --------- ---------
[__________________]
- --------------------------- --------- ---------- --------- --------- ---------- --------- ---------
<S>                          <C>       <C>         <C>        <C>        <C>    <C>       <C>



[__________________]



- --------------------------- --------- ---------- --------- --------- ---------- --------- ---------

</TABLE>



                                                                          75
<PAGE>

                                                                EXHIBIT 6.7


                            U.S. PROFIT SHARING EXAMPLE

<TABLE>
<CAPTION>

[__________________]
<S>                       <C>               <C>                                  <C>

[__________________________]

</TABLE>





                                                                          76
<PAGE>

                                                                EXHIBIT 20.3

                         ALTERNATIVE DISPUTE RESOLUTION


The parties recognize that bona fide disputes as to certain matters may arise
from time to time during the term of this Agreement which relate to either
Party's rights and/or obligations. To have such a dispute resolved by this
Alternative Dispute Resolution ("ADR") provision, a Party first must send
written notice of the dispute to the other Party for attempted resolution by
good faith negotiations between their respective presidents (or their
designees) of the affected subsidiaries, divisions, or business units within
twenty-eight (28) days after such notice is received (all references to
"days" in this ADR provision are to calendar days).

If the matter has not been resolved within twenty-eight (28) days of the
notice of dispute, or if the parties fail to meet within such twenty-eight
(28) days, either Party may initiate an ADR proceeding as provided herein.
The parties shall have the right to be represented by counsel in such a
proceeding.

1. To begin an ADR proceeding, a Party shall provide written notice to the
other Party of the issues to be resolved by ADR. Within fourteen (14) days
after its receipt of such notice, the other Party may, by written notice to
the Party initiating the ADR, add additional issues to be resolved within the
same ADR.

2. Within twenty-one (21) days following receipt of the original ADR notice,
the parties shall select a mutually acceptable neutral to preside in the
resolution of any disputes in this ADR proceeding. If the parties are unable
to agree on a mutually acceptable neutral within such period, either Party
may request the President of the CPR Institute for Dispute Resolution
("CPR"), 366 Madison Avenue, 14th Floor, New York, New York 10017, to select
a neutral pursuant to the following procedures:

     (a) The CPR shall submit to the parties a list of not less than five (5)
candidates within fourteen (14) days after receipt of the request, along with
a CURRICULUM VITAE for each candidate. No candidate shall be an employee,
director, or shareholder of either Party or any of their subsidiaries or
affiliates.


                                                                          77

<PAGE>

     (b) Such list shall include a statement of disclosure by each candidate
of any circumstances likely to affect his or her impartiality.

     (c) Each Party shall number the candidates in order of preference (with
the number one (1) signifying the greatest preference) and shall deliver the
list to the CPR within seven (7) days following receipt of the list of
candidates. If a Party believes a conflict of interest exists regarding any
of the candidates, that Party shall provide a written explanation of the
conflict to the CPR along with its list showing its order of preference for
the candidates. Any Party failing to return a list of preferences on time
shall be deemed to have no order of preference.

     (d) If the parties collectively have identified fewer than three (3)
candidates deemed to have conflicts, the CPR immediately shall designate as
the neutral the candidate for whom the parties collectively have indicated
the greatest preference. If a tie should result between two candidates, the
CPR may designate either candidate. If the parties collectively have
identified three (3) or more candidates deemed to have conflicts, the CPR
shall review the explanations regarding conflicts and, in its sole
discretion, may either (i) immediately designate as the neutral the candidate
for whom the parties collectively have indicated the greatest preference, or
(ii) issue a new list of not less than five (5) candidates, in which case the
procedures set forth in subparagraphs 2(a) - 2(d) shall be repeated.

3.   No earlier than twenty-eight (28) days or later than fifty-six (56) days
after selection, the neutral shall hold a hearing to resolve each of the
issues identified by the parties. The ADR proceeding shall take place at a
location agreed upon by the parties. If the parties cannot agree, the neutral
shall designate a location other than the principal place of business of
either Party or any of their subsidiaries or affiliates.

4.   At least seven (7) days prior to the hearing, each Party shall submit the
following to the other Party and the neutral:

     (a) a copy of all exhibits on which such Party intends to rely in any oral
or written presentation to the neutral;

     (b) a list of any witnesses such Party intends to call at the hearing, and
a short summary of the anticipated testimony of each witness;


                                                                          78

<PAGE>

     (c) a proposed ruling on each issue to be resolved, together with a
request for a specific damage award or other remedy for each issue. The
proposed rulings and remedies shall not contain any recitation of the facts
or any legal arguments and shall not exceed one (1) page per issue.

     (d) a brief in support of such Party's proposed rulings and remedies,
provided that the brief shall not exceed twenty (20) pages. This page
limitation shall apply regardless of the number of issues raised in the ADR
proceeding.

Except as expressly set forth in subparagraphs 4(a) - 4(d), no discovery
shall be required or permitted by any means, including depositions,
interrogatories, requests for admissions, or production of documents.

5.   The hearing shall be conducted on two (2) consecutive days and shall be
governed by the following rules:

     (a) Each Party shall be entitled to five (5) hours of hearing time to
present its case. The neutral shall determine whether each Party has had the
five (5) hours to which it is entitled.

     (b) Each Party shall be entitled, but not required, to make an opening
statement, to present regular and rebuttal testimony, documents or other
evidence, to cross-examine witnesses, and to make a closing argument.
Cross-examination of witnesses shall occur immediately after their direct
testimony, and cross-examination time shall be charged against the Party
conducting the cross-examination.

     (c) The Party initiating the ADR shall begin the hearing and, if it chooses
to make an opening statement, shall address not only issues it raised but also
any issues raised by the responding Party. The responding Party, if it chooses
to make an opening statement, also shall address all issues raised in the ADR.
Thereafter, the presentation of regular and rebuttal testimony and documents,
other evidence, and closing arguments shall proceed in the same sequence.

     (d) Except when testifying, witnesses shall be excluded from the hearing
until closing arguments.

     (e) Settlement negotiations, including any statements made therein, shall
not be admissible under any circumstances.


                                                                          79

<PAGE>

Affidavits prepared for purposes of the ADR hearing also shall not be
admissible. As to all other matters, the neutral shall have sole discretion
regarding the admissibility of any evidence.

6.   Within seven (7) days following completion of the hearing, each Party
may submit to the other Party and the neutral a post-hearing brief in support
of its proposed rulings and remedies, provided that such brief shall not
contain or discuss any new evidence and shall not exceed ten (10) pages. This
page limitation shall apply regardless of the number of issues raised in the
ADR proceeding.

7.   The neutral shall rule on each disputed issue within fourteen (14) days
following completion of the hearing. Such ruling shall adopt in its entirety
the proposed ruling and remedy of one of the parties on each disputed issue
but may adopt one Party's proposed rulings and remedies on some issues and
the other Party's proposed rulings and remedies on other issues. The neutral
shall not issue any written opinion or otherwise explain the basis of the
ruling.

8.   The neutral shall be paid a reasonable fee plus expenses. These fees and
expenses, along with the reasonable legal fees and expenses of the prevailing
Party (including all expert witness fees and expenses), the fees and expenses
of a court reporter, and any expenses for a hearing room, shall be paid as
follows:

     (a) If the neutral rules in favor of one Party on all disputed issues in
the ADR, the losing Party shall pay 100% of such fees and expenses.

     (b) If the neutral rules in favor of one Party on some issues and the
other Party on other issues, the neutral shall issue with the rulings a
written determination as to how such fees and expenses shall be allocated
between the parties. The neutral shall allocate fees and expenses in a way
that bears a reasonable relationship to the outcome of the ADR, with the
Party prevailing on more issues, or on issues of greater value or gravity,
recovering a relatively larger share of its legal fees and expenses.

9.   The rulings of the neutral and the allocation of fees and expenses shall
be binding, non-reviewable, and non-appealable, and may be entered as a final
judgment in any court having jurisdiction.


                                                                          80

<PAGE>

10.  Except as provided in paragraph 9 or as required by law, the existence
of the dispute, any settlement negotiations, the ADR hearing, any submissions
(including exhibits, testimony, proposed rulings, and briefs), and the
rulings shall be deemed Confidential Information. The neutral shall have the
authority to impose sanctions for unauthorized disclosure of Confidential
Information.

                                                                          81

<PAGE>

                                                                EXHIBIT 20.11


                               JOINT PRESS RELEASE

                                                FOR IMMEDIATE RELEASE
                                                ABBOTT LABORATORIES
                                                MEDIA:
                                                Matt Kuhn (847) 937-2993
                                                FINANCIAL COMMUNITY:
                                                John Thomas (847) 938-2655

ABBOTT AND SUPERGEN SIGN WORLDWIDE SALES AND DISTRIBUTION AGREEMENT FOR
CHEMOTHERAPY COMPOUND RUBITECAN ABBOTT PARK, Ill., and SAN RAMON, Calif.,
December 22, 1999 -- Abbott Laboratories (NYSE:ABT) and SuperGen, Inc. (NASDAQ:
SUPG & SUPGW & SUPGZ) today announced the signing of a worldwide sales and
marketing agreement for the cancer drug rubitecan.

Rubitecan is an oral chemotherapy compound in the camptothecin class and is
currently in Phase III studies for the treatment of pancreatic cancer.
Pancreatic cancer is associated with high patient mortality causing more than
75,000 deaths annually in the United States and Europe. It is the fourth leading
cause of death by cancer in the United States, with an average survival rate of
four to five months following diagnosis at an advanced stage. "Rubitecan is a
potentially valuable addition to our Oncology franchise. Clinical data suggest
that rubitecan has the potential to become a safe and effective therapy for the
treatment of pancreatic cancer, a disease for which there are limited treatment
options available," said Richard A. Gonzalez, senior vice president, hospital
products at Abbott Laboratories. "Furthermore, feedback from patients and
clinicians worldwide has indicated a great need for an oral chemotherapy
alternative."

"Completing this agreement with Abbott is certainly a historic milestone in
our continuing mission to build an independent, preeminent cancer-fighting
company," said Joseph Rubinfeld, Ph.D., chairman and chief executive officer
of SuperGen. "As one of the world's largest health care companies, Abbott
possesses the resources to ensure significant global market penetration of
rubitecan upon regulatory approval. This

                                                                         82

<PAGE>

agreement allows SuperGen to maintain its considerable U.S. presence and
oncology franchise." Under terms of the agreement, Abbott will make an
initial equity investment in SuperGen. Additional equity investments, cash
milestones and option exercises are contemplated over the life of the
agreement. Abbott will have exclusive distribution and promotion rights for
rubitecan outside the United States and co-promotion rights with SuperGen for
rubitecan within the United States. In addition, Abbott will become the
exclusive U.S. distributor for Nipent-R-, SuperGen's currently marketed
product for the treatment of hairy cell leukemia. SuperGen retains U.S.
marketing rights for Nipent. Rubitecan is currently being studied at more
than 200 clinical sites for the treatment of pancreatic cancer. SuperGen has
previously reported that it expects to initiate clinical trials of rubitecan
for additional tumor types. Under the agreement announced today, SuperGen
will be responsible for funding clinical development of a pancreatic cancer
claim for the drug.

Abbott Laboratories is a global, diversified health care company devoted to the
discovery, development, manufacture and marketing of pharmaceutical, diagnostic,
nutritional and hospital products. The company employs 56,000 people and markets
its products in more than 130 countries. In 1998, the company's sales and net
earnings were $12.5 billion and $2.3 billion, respectively, with diluted
earnings per share of $1.51. Abbott's news releases and other information are
available on the company's Web site at www.abbott.com.

Based in San Ramon, California, SuperGen is a pharmaceutical company dedicated
to the development and commercialization of products to treat life-threatening
diseases, particularly cancer.

THIS PRESS RELEASE CONTAINS "FORWARD-LOOKING" STATEMENTS WITHIN THE MEANING OF
SECTION 27A OF THE SECURITIES ACT OF 1933, AS AMENDED, AND SECTION 21E OF THE
SECURITIES EXCHANGE ACT OF 1934, AS AMENDED, AND ARE SUBJECT TO THE SAFE HARBORS
CREATED THEREBY. SUCH STATEMENTS, INCLUDING THOSE REGARDING THE "EXPECTED"
SAFETY PROFILE OF CAMPTOTHECIN COMPOUNDS, THE "PROMISING" NATURE AND "POTENTIAL"
OF CAMPTOTHECIN COMPOUNDS AND THE "SUGGESTION" OF REDUCED SIDE EFFECTS OF
CAMPTOTHECIN COMPOUNDS, INVOLVE CERTAIN RISKS AND UNCERTAINTIES INHERENT WITH
RESEARCH IN THE BIOTECHNOLOGY/PHARMACEUTICAL FIELD.

                                                                        83

<PAGE>

ACTUAL RESULTS COULD DIFFER MATERIALLY FROM THOSE PROJECTED IN THE
"FORWARD-LOOKING" STATEMENTS AS A RESULT OF FURTHER STUDY AND CLINICAL TRIALS.
FURTHER INFORMATION ON POTENTIAL FACTORS THAT COULD AFFECT SUPERGEN'S FINANCIAL
RESULTS IS DISCUSSED IN SUPERGEN'S REPORTS IN FILE WITH THE U.S. SECURITIES AND
EXCHANGE COMMISSION (INCLUDING BUT NOT LIMITED TO THE REPORT ON FORM 10K FOR THE
FISCAL YEAR ENDED DECEMBER 31, 1998 AND ON FORM 10-Q FOR THE QUARTER ENDED
SEPTEMBER 30, 1999).

                                       ###

                                                                           84



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