ONCOGENE SCIENCE INC
10-Q, 1996-02-14
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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<PAGE>   1
                             WASHINGTON, D.C. 20549

                                    FORM 10-Q

(Mark One)

/X/      QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934

For the quarterly period ended         December 31, 1995
                               -------------------------------------------------
                                       OR

/ /      TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES
         EXCHANGE ACT OF 1934


For the transition period from              to
                              --------------  --------------

Commission file number                    0-15190
                      ----------------------------------------------------------

                          ONCOGENE SCIENCE, INC.
- --------------------------------------------------------------------------------
             (Exact name of registrant as specified in its charter)

     DELAWARE                                               13-3159796
- --------------------------------------------------------------------------------
(State or other jurisdiction of                        (I.R.S. Employer
incorporation or organization)                         Identification No.)


          106 Charles Lindbergh Blvd., Uniondale, New York           11553
- --------------------------------------------------------------------------------
(Address of principal executive offices)                          (Zip Code)

                               516-222-0023
- --------------------------------------------------------------------------------
          (Registrant's telephone number, including area code)


- --------------------------------------------------------------------------------
(Former name, former address and former fiscal year, if changed since last
report.)

  Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days. Yes  X   No
                                              ---     ---

                      APPLICABLE ONLY TO CORPORATE ISSUERS:

At January 31, 1996 the registrant had outstanding 17,541,034 shares of common
stock .$01 par value.
                                                                 Total Pages: 10
<PAGE>   2
                     ONCOGENE SCIENCE, INC. AND SUBSIDIARIES

                                      INDEX
<TABLE>
<CAPTION>
                                                                       Page No.
                                                                       --------
<S>                                                                       <C>
PART I - FINANCIAL INFORMATION - UNAUDITED

Consolidated Balance Sheets - December 31, 1995
  and September 30, 1995                                                   3

Consolidated Statements of Operations
  - Three months ended December 31, 1995 and 1994                          4

Consolidated Statements of Cash Flows
  - Three months ended December 31, 1995 and 1994                          5

Note to Consolidated Financial Statements                                  6

Management's Discussion and Analysis of Financial                          7
Condition and Results of Operations


PART II - OTHER INFORMATION                                                9


SIGNATURES                                                                10
</TABLE>
                                    * * * *
<PAGE>   3



ITEM 1.  FINANCIAL STATEMENTS

                     ONCOGENE SCIENCE, INC. AND SUBSIDIARIES

                           CONSOLIDATED BALANCE SHEETS

<TABLE>
<CAPTION>
                                                     December 31,        September 30,
Assets                                                   1995                1995
                                                     -----------         -----------
<S>                                                  <C>                 <C>
Current assets:
  Cash and cash equivalents                          $ 1,787,990         $17,919,609
  Short-term investments                              22,296,727           8,866,957
  Receivables, including
    trade receivables of $88,371 and
    $163,132 at December 31 and
    September 30, 1995, respectively                   2,253,533           1,320,015
  Interest receivable                                     67,769              45,263
  Grants receivable                                      209,748             433,530
  Prepaid expenses and other                             652,024             518,150
                                                     -----------         -----------
                  Total current assets                27,267,791          29,103,524
                                                     -----------         -----------


Property, equipment and leasehold
  improvements - net                                   5,445,005           5,709,515
Other receivable                                         408,659             262,703
Loans to officers and employees                           25,464              25,516
Other assets                                             324,500             325,582
Intangible assets - net                                8,267,392           8,630,581
                                                     -----------         -----------
                                                     $41,738,811         $44,057,421
                                                     ===========         ===========
Liabilities and Stockholders' Equity

Current liabilities:
  Account payable and accrued expenses               $ 1,806,902         $ 2,825,702
  Current portion of unearned revenue                    193,166             150,041
                                                     -----------         -----------
                  Total current liabilities            2,000,068           2,975,743
                                                     -----------         -----------


Other Liabilities:
  Long-term portion of unearned revenue                  151,509             165,839
  Accrued postretirement benefits cost                   399,329             366,203
                                                     -----------         -----------
                  Total liabilities                    2,550,906           3,507,785
                                                     -----------         -----------

Stockholders' equity:
  Common stock, $.01 par value;
         50,000,000 shares authorized,
         17,750,310 and 17,683,047
         issued at December 31 and
         September 30, 1995, respectively                177,503             176,830
  Additional paid-in capital                          66,998,116          66,735,375
  Accumulated deficit                                (27,899,935)        (26,129,341)
  Cumulative foreign currency
         translation adjustment                          (40,220)            (55,669)
  Unrealized holding gain (loss) on
     short-term investments                               95,000             (35,000)
                                                     -----------         -----------

                                                      39,330,454          40,692,195
  Less:  treasury stock, at cost
    222,521 shares at December 31
    and September 30, 1995                              (142,559)           (142,559)
                                                     -----------         -----------
                  Total stockholders' equity          39,187,905          40,549,636
                                                     -----------         -----------
Commitments and contingencies
                                                     $41,738,811         $44,057,421
                                                     ===========         ===========
</TABLE>
            See accompanying notes to consolidated financial statements.
<PAGE>   4
                     ONCOGENE SCIENCE, INC. AND SUBSIDIARIES

                      CONSOLIDATED STATEMENTS OF OPERATIONS

                                   (UNAUDITED)

<TABLE>
<CAPTION>
                                                               Three Months Ended
                                                                   December 31,
                                                    ---------------------------------------
                                                        1995                       1994
                                                    ------------                -----------
<S>                                                 <C>                         <C>
Revenues:
  Collaborative program revenues,
     principally from related parties               $  1,987,458                $ 2,318,374
  Sales                                                   29,042                  1,313,689
  Other research revenue                                 259,748                    575,918
                                                    ------------                -----------

                                                       2,276,248                  4,207,981
                                                    ------------                -----------
Expenses:
  Research and development                             2,683,262                  3,076,965
  Production                                              21,863                    405,278
  Selling, general and administrative                  1,331,539                  1,874,429
  Amortization of intangibles                            363,189                    436,334
                                                    ------------                -----------

                                                       4,399,853                  5,793,006

         Loss from operations                         (2,123,605)                (1,585,025)
                                                    ------------                -----------

Other income (expense):
  Net investment income                                  364,524                    220,672
  Other expense                                          (11,513)                   (26,634)
                                                    ------------                -----------

Net loss                                              (1,770,594)                (1,390,987)
                                                    ============                ===========

Weighted average number of shares
  of common stock outstanding                         17,476,343                 16,342,604
                                                    ============                ===========

Net loss per weighted average share of
  common stock outstanding                          $       (.10)               $      (.09)
                                                    ============                ===========
</TABLE>


          See accompanying notes to consolidated financial statements.
<PAGE>   5
                    ONCOGENE SCIENCE, INC. AND SUBSIDIARIES

                     CONSOLIDATED STATEMENTS OF CASH FLOWS
<TABLE>
<CAPTION>
                                               Three Months Ended December 31,
                                              --------------------------------
                                                  1995                 1994
                                                  ----                 ----
<S>                                           <C>                  <C>
Cash flow from operating activities:
  Net loss                                    $(1,770,594)         $(1,390,987)
  Adjustments to reconcile net
    loss to net cash used
    by operating activities:
  Gain on sale of investments                     (27,608)                 -
  Depreciation and amortization                   341,240              323,233
  Amortization of intangibles                     363,189              436,334
  Foreign exchange loss                            15,449               11,474


  Changes in assets and liabilities:
  Receivables                                    (933,518)             460,588
  Inventory                                           -                111,282
  Interest receivable                             (22,506)            (117,109)
  Grants receivable                               223,782              134,997
  Prepaid expenses and other                     (133,874)              46,322
  Other receivable                               (145,956)            (279,584)
  Other assets                                      1,082                4,392
  Accounts payable
    and accrued expenses                       (1,018,800)            (375,977)
  Unearned revenue                                 28,795              459,676
  Accrued postretirement
    benefit cost                                   33,126               34,689
                                              -----------          -----------
Net cash used by
  operating activities                        $(3,046,193)           $(140,670)
                                              -----------          -----------
</TABLE>

                                   Continued

<PAGE>   6
                     ONCOGENE SCIENCE, INC. AND SUBSIDIARIES
                CONSOLIDATED STATEMENTS OF CASH FLOWS (CONTINUED)

<TABLE>
<CAPTION>
                                                 Three Months Ended December 31,
                                                 -------------------------------
                                                   1995                    1994
                                                   ----                    ----
<S>                                            <C>                     <C>
Cash flows from investing activities:
  Additions to short-term
    investments                                 (15,772,162)              (499,687)
  Maturities and sales of short-term
    investments                                   2,500,000              1,756,725
  Additions to property,
    equipment and leasehold
    improvements                                    (76,730)              (428,460)
  Net change in loans to officers
    and employees                                        52                    -
  Other                                                 -                   (7,900)
                                               ------------            -----------
Net cash provided by (used in)
  investing activities                          (13,348,840)               820,678
                                               ------------            -----------

Cash flows from financing activities:
  Proceeds from exercise
    of stock options, employee
    stock purchase plan and other                   263,414                  1,956
                                               ------------            -----------
Net cash provided by
    financing activities                            263,414                  1,956
                                               ------------            -----------

Net increase (decrease) in cash
  and cash equivalents                          (16,131,619)               681,964
Cash and cash equivalents at
  beginning of year                              17,919,609                322,308
                                               ------------            -----------
Cash and cash equivalents
  at end of year                               $  1,787,990            $ 1,004,272
                                               ============            ===========
</TABLE>

See accompanying notes to consolidated financial statements.
<PAGE>   7
                    ONCOGENE SCIENCE, INC. AND SUBSIDIARIES
                   NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
                                  (UNAUDITED)


(1) Opinion of Management

In the opinion of Management, the accompanying unaudited consolidated financial
statements contain all adjustments (consisting of only normal recurring
accruals) necessary to present fairly the Company's financial position as of
December 31, 1995 and September 30, 1995, its results of operations and its cash
flows for the three months ended December 31, 1995 and 1994. Certain
reclassifications have been made to the prior financial statements to conform
them to the current presentation.

It is recommended that these consolidated financial statements be read in
conjunction with the consolidated financial statements and notes thereto in the
Company's 1995 Annual Report on Form 10-K.

Results for interim periods are not necessarily indicative of results for the
entire year.

Net loss per share of common stock outstanding is based on the weighted average
number of shares outstanding. Common share equivalents (stock options) are not
included in the computation for the three months ended December 31, 1995 and
1994 since their inclusion would be anti-dilutive.

(2) Use of Estimates

Management of the Company has made a number of estimates and assumptions
relative to the reporting of assets and liabilities and the disclosure of
contingent assets and liabilities to prepare these financial statements in
conformity with generally accepted accounting principles. Actual results could
differ from those estimates.

(3) Dependence on Collaborative Relationships

The Company does not intend to conduct late-stage clinical trials,
manufacturing or marketing activities with respect to any of its product
candidates in the foreseeable future. The Company has collaborations with
Ciba-Geigy, Ltd., Pfizer Inc., Hoechst Marion Roussel, Inc. and Wyeth-Ayerst
Laboratories for the development of potential drug candidates, and with Becton
Dickinson and Co. for the development of cancer diagnostics. The Company is
dependent on the companies with which it collaborates for the preclinical
testing, clinical development, regulatory approval, manufacturing and marketing
of potential products developed under its collaborative research programs. The
Company's collaborative agreements allow its collaborative partners significant
discretion in electing to pursue or not to pursue any of these activities. The
Company cannot control the amount and timing of resources its collaborative
partners devote to the Company's programs or potential products. If any of the
Company's collaborative partners were to breach or terminate its agreements with
the Company or otherwise fail to conduct its collaborative activities
successfully in a timely manner, the preclinical or clinical development or
commercialization of product candidates or research programs could be delayed or
terminated. Any such delay or termination could have a material adverse effect
on the Company's business, financial condition and results of operations.
<PAGE>   8
ITEM 2.MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION

THREE MONTHS ENDED DECEMBER 31, 1995 COMPARED TO THE THREE MONTHS ENDED DECEMBER
31, 1994.

Revenues

Revenues for the quarter ended December 31, 1995 were approximately $2.3
million, a decrease of $1.9 million, or 46% when compared to revenues of $4.2
million reported for the quarter ended December 31, 1994. The decrease was due
to lower sales of research products which accounted for approximately $1.3
million of the decrease in revenues. The Company sold its Research Products
Business for $6.0 million in cash plus other considerations on August 2, 1995,
and accordingly there were no significant sales of research products recorded 
after this date. In the purchase agreement, the Company agreed to indemnify the
purchaser for a period of two years for certain breaches of the agreement.
Collaborative program revenue decreased approximately $331,000 or 14%. This was
largely due to a reduction in collaborative revenue under the collaborative
arrangement with Hoechst Marion Roussel, Inc. ("HMRI") as compared to the total
revenue in the prior year's quarter from Marion Merrell Dow Inc. ("MMDI"), 
Hoechst Roussel Pharmaceuticals, Inc. and Hoechst AG. Other research revenues
representing primarily government grants have decreased approximately $316,000
in the quarter ended December 31, 1995 compared to the quarter ended December
31, 1994 due in part to the expiration of a U.S. government grant. The balance
of the decrease represents changes in the timing and amount of grant awards. The
Company expects that grant revenue will be somewhat lower in the current fiscal
year.

Expenses

The Company's operating expenses decreased by approximately $1.4 million or 24%
for the quarter ended December 31, 1995 compared to the quarter ended December
31, 1994. Research and development expenses decreased approximately $394,000, or
13% due to reductions in expenses in the HMRI and Becton Dickinson and Co. 
("Becton") collaborations commensurate with the reduced funding in these
programs. This was offset in part by increased expenditures in the Company's
proprietary research programs. Production expenses and selling, general and
administrative expenses decreased approximately $926,000. These reductions were
directly related to expenses which were associated with the Company's Research
Products Business in the quarter ended December 31, 1994. The reduction of
approximately $73,000 of amortization of intangibles is due to a portion of
goodwill relating to the Research Products Business which was expensed when the
business was sold in August 1995.

Other Income and Expense

Investment income increased approximately $144,000, or 65% for the quarter ended
December 31, 1995 as compared to the quarter ended December 31, 1994. This
increase was largely due to the increase in funds invested as a result of the
<PAGE>   9
THREE MONTHS ENDED DECEMBER 31, 1995 COMPARED TO THE THREE MONTHS ENDED DECEMBER
31, 1994.

proceeds from the sale of the Research Products Business and the sale of stock
to Ciba-Geigy, Ltd. ("Ciba") in April 1995.

New Accounting Pronouncements

In March 1995,  Statement of Financial  Accounting  Standards  (SFAS) No. 121,
"Accounting  for the  Impairment of Long-Lived Assets and for Long-Lived Assets
to Be Disposed Of" was issued which establishes accounting standards for the
impairment of long-lived assets, certain identifiable intangibles, and goodwill
related to those assets to be held and used and for long-lived assets and
certain intangibles to be disposed of. SFAS No. 121 requires that long-lived
assets and certain intangibles to be held and used by an entity be reviewed for
impairment whenever events or changes in circumstances indicate that the
carrying amount of the asset may not be recoverable. SFAS No. 121 must be
implemented no later than fiscal 1997. The adoption of SFAS No. 121 is not
expected to have material impact on the Company's consolidated financial
position or operating results.

In October 1995, SFAS No. 123, "Accounting for Stock-Based Compensation", was
issued which establishes financial accounting and reporting standards for
stock-based employee compensation plans. SFAS No. 123 defines a fair value based
method of accounting for an employee stock option or similar equity instrument
and encourages all entities to adopt that method of accounting for all of their
employee stock compensation plans. However, SFAS No. 123 would permit the
Company to continue to measure compensation costs for its stock option plans
using the intrinsic value based method of accounting prescribed by APB Opinion
No. 25, "Accounting for Stock Issued to Employees". If the Company elected to
remain with its current accounting, the Company must make pro forma disclosures
of net income and earnings (loss) per share as if the fair value based method of
accounting had been applied. SFAS No. 123 must be implemented no later than
fiscal 1997. The Company has not yet determined the valuation method it will
employ or the effect on operating results of implementing SFAS No. 123.

Liquidity and Capital Resources

At December 31, 1995, working capital (representing primarily cash, cash
equivalents and short-term investments) aggregated approximately $25.3 million.

The Company has been, and will continue to be, dependent upon collaborative
research revenues, government research grants, interest income and cash balances
until products developed from its technology are commercially marketed. On April
19, 1995, Ciba purchased 909,091 shares of the Company's common stock for an
aggregate purchase price of $5.0 million.


<PAGE>   10
THREE MONTHS ENDED DECEMBER 31, 1995 COMPARED TO THE THREE MONTHS ENDED DECEMBER
31, 1994.

During 1995, MMDI was acquired by HMRI as part of a transaction in which the
pharmaceutical operations of Hoechst AG, Hoechst Roussel Pharmaceuticals,
Inc. and MMDI were consolidated. The Company is aware that HMRI is conducting
a review of all its research and development programs. Based on discussions
with HMRI, the Company expects its programs with HMRI to continue under one
overall agreement in the future, although there can be no assurance that the
Company and HMRI will enter into such an overall agreement, or if such an
agreement is entered into, that it will not be on terms less favorable than
the existing agreements. The Company anticipates that the total funding
under the consolidated agreement will be somewhat lower than the aggregate
level of funding under the three previously separate agreements.

Since its commencement in 1991 and until the second quarter of fiscal 1995, the
cancer diagnostics collaborative program with Becton has focused on both
serum-based and histochemical immunoassays. During the second quarter of fiscal
1995, Becton decided to focus exclusively on cellular cancer diagnostics
including histochemical immunoassays.  Becton has reduced its funding under this
program in fiscal 1996, and the Company is uncertain as to Becton's ongoing
support for this program thereafter. The Company is continuing the development
of serum-based cancer diagnostic products and is in discussions with possible
new collaborative partners in this area. However, there can be no assurance that
the development of these tests will not be terminated.

The Company believes that with the funding from its collaborative research
programs, government research grants, interest income, and cash balances, the
Company's financial resources are adequate for its operations through fiscal
1999. However, the Company's capital requirements may vary as a result of a
number of factors, including, competitive and technological developments, funds
required for expansion of the Company's technology platform, including possible
joint ventures, collaborations, and acquisitions, the time and expense required
to obtain governmental approval of products, and any potential indemnification
payments to the purchaser of the Research Products Business, some of which
factors are beyond the Company's control. The Company intends to increase
substantially its expenditures and capital investment over the next several
years in enhancing its drug discovery technologies and pursuing proprietary drug
discovery programs. There can be no assurance that scheduled payments will be
made by third parties, that current agreements will not be cancelled, that
government research grants will continue to be received at current levels or
that unanticipated events requiring the expenditure of funds will not occur.
Further, there can be no assurance that the Company will be able to obtain any
additional required funds, or, if such funds are available, that such funds will
be available on favorable terms. Failure to obtain additional funds when
required would have a material adverse effect on the Company's business,
financial condition and results of operations.

<PAGE>   11
ITEM 6. EXHIBITS

        The following is a list of exhibits filed as part of this Report:

        10.1*   Amendatory Agreement dated as of December 31, 1993
                between the Company and American Home Products Corporation

        10.2*   Collaborative Research Agreement dated as of December 31, 1991
                between the Company and American Home Products Corporation

        10.3*   Collaborative Research Agreement dated as of January 4, 1993
                between the Company and Hoechst AG

        10.4*   Collaborative Research Agreement dated as of October 1, 1993
                between the Company and Hoechst Roussel Pharmaceuticals, Inc.

        27      Financial Data Schedule

- -------------
* Portions of this exhibit have been redacted and are the subject of a 
  confidential treatment request filed with the Secretary of the Securities 
  and Exchange Commission pursuant to rule 24b-2 under the Securities Exchange 
  Act of 1934, as amended.


<PAGE>   12
SIGNATURES

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

                                      ONCOGENE SCIENCE, INC.
                                    ----------------------------
                                             (Registrant)


Date   2 / 14 / 96                  /s/ Gary E. Frashier
    ------------------              ----------------------------
                                    Gary E.Frashier
                                    Chief Executive Officer


Date   2 / 14 / 96                  /s/ Robert L. Van Nostrand
    ------------------              ----------------------------
                                    Robert L. Van Nostrand
                                    Vice President
                                    Finance & Administration
<PAGE>   13
                               INDEX TO EXHIBITS

<TABLE>
<CAPTION>

Exhibits                                                Page No.
- --------                                                --------
<S>             <C>                                     <C>
10.1*           Amendatory Agreement dated as
                of December 31, 1993 between
                the Company and American
                Home Products Corporation

10.2*           Collaborative Research Agreement
                dated as of December 31,
                1991 between the Company and
                American Home Products Corporation

10.3*           Collaborative Research Agreement
                dated as of January 4, 1993
                between the Company and
                Hoechst AG

10.4*           Collaborative Research Agreement
                dated as of October 1, 1993
                between the Company and
                Hoechst Roussel Pharmaceuticals,
                Inc.

27              Financial Data Schedule

</TABLE>
- --------------
* Portions of this exhibit have been redacted and are the subject of a 
  confidential treatment request filed with the Secretary of the Securities and 
  Exchange Commission pursuant to rule 24b-2 under the Securities Exchange Act
  of 1934, as amended.

<PAGE>   1
                                                                    EXHIBIT 10.1

- --------------------------------------------------------------------------------
Portions of this Exhibit 10.1 have been redacted and are the subject of a 
confidential treatment request filed with the Secretary of the Securities and 
Exchange Commission.
- --------------------------------------------------------------------------------
<PAGE>   2
                                                                    Exhibit 10.1


                              AMENDATORY AGREEMENT

         This AMENDATORY AGREEMENT is entered into as of December 31, 1993 by
and between AMERICAN HOME PRODUCTS CORPORATION, a corporation of the State of
Delaware, U.S.A., having its principal place of business at Five Giralda Farms,
Madison, New Jersey 07940-0874, U.S.A., as represented by its agent,
WYETH-AYERST LABORATORIES DIVISION (hereinafter collectively referred to as
"Wyeth") and ONCOGENE SCIENCE, INC. (hereinafter referred to as "OSI"), a
corporation of the State of Delaware, having its principal place of business at
106 Charles Lindbergh Boulevard, Uniondale, New York 11553, U.S.A.

         WHEREAS, Wyeth and OSI entered into a Collaborative Research Agreement
as of December 31, 1991 (the "Collaborative Research Agreement") pursuant to
which, among other things, OSI is currently screening chemical compounds
included within the Wyeth Technology against the Targets which are the subject
of the Research Program.

         WHEREAS, Wyeth and OSI wish to amend the Collaborative Research
Agreement to extend its term, to provide additional funding commitments on the
part of Wyeth and to make the additional changes hereinafter provided for.

         NOW, THEREFORE, the parties agree as follows:

         1.       Defined terms used but not defined herein shall have the
meanings specified in Section 1 of the Collaborative Research Agreement.

         2.       Effective December 31, 1993, the Collaborative Research
Agreement shall be extended and amended as more fully provided in this
Amendatory Agreement.

         3.       From and after January 1, 1994, the OSI Appointees referred to
in Section 2.2.2 of the Collaborative Research Agreement shall be as follows:

                                      ***
                                      ***
                                      ***
and Wyeth-Ayerst appointees:          ***

                                      ***
                                      ***
                                      ***
                                      ***



*** These portions deleted pursuant to a request for confidential treatment.
<PAGE>   3
         4.       The following shall be added at the end of Section 3.1 of the
Collaborative Research Agreement:

                  "The Annual Commitment from the Commitment Year beginning
                  January 1, 1994 is ***. The Annual Commitment for the
                  Commitment Year beginning January 1, 1995 is *** and
                  the Annual Commitment for the Commitment Year beginning
                  January 1, 1996 is ***."

         5.       The second sentence of Section 3.2 of the Collaborative
Research Agreement is amended to read in its entirety as follows:

                  "Each Annual Commitment is subject to modification by mutual
                  agreement if an unusually large number of lead compounds are
                  identified or if additional genetic constructs are required by
                  OSI to facilitate lead development as specified in the
                  applicable Annual Sponsored Research Plan."

         6.       Section 9.1 of the Collaborative Research Agreement is amended
to read in its entirety as follows:

                  "9.1 Term. Unless sooner terminated or extended, this
                  Agreement shall expire on December 31, 1996, subject to the
                  early termination provisions of Section 9.5 and subject
                  further to the ability of the parties to extend the term of
                  this Agreement if they so agree."

         7.       Section 9.5 of the Collaborative Research Agreement is amended
to read in its entirety as follows:

                  "9.5 Termination by Wyeth. After this Agreement has been in
                  effect for a period of thirty-two (32) months, Wyeth may
                  terminate this Agreement, with or without cause, by giving OSI
                  four (4) months notice at any time after the expiration of
                  said thirty-two (32) month period. If Wyeth terminates this
                  Agreement pursuant to this section, it will make the Funding
                  Payments which would otherwise have been due for such
                  four-month period and will retain all rights set forth in any
                  License Agreements then in effect subject to the requirements
                  of those Agreements."

         8.       The forms of License Agreements annexed as Exhibit 2 and
Exhibit 3 to the Collaborative Research Agreement are amended by adding words ",
as amended by an Amendatory Agreement dated as of December 31, 1993" at the end
of the definition of

*** These portions deleted pursuant to a request for confidential treatment.


                                      -2-
<PAGE>   4
"Collaborative Research Agreement" set forth in Section 1.1 of each such forms
of License Agreement.

         9.       The parties hereto acknowledge that except as hereby modified
the Collaborative Research Agreement remains in full force and effect and sets
forth the entire agreement and understanding of such parties as to the subject
matter thereof.

         10.      The Amendatory Agreement shall be construed in accordance with
the laws of the State of New Jersey.

         11.      This Amendatory Agreement may be executed simultaneously in
two or more counterparts, each of which shall be deemed an original.

         IN WITNESS WHEREOF, the parties have hereunto set their hands and duly
executed this Amendment as of the day and year set forth below.

                                         AMERICAN HOME PRODUCTS CORPORATION


                                         By:      _____________________________
                                         Title:   _____________________________

                                         ONCOGENE SCIENCE, INC.


                                         By:      _____________________________
                                         Title:   _____________________________

                                      -3-

<PAGE>   1
                                                                   EXHIBIT 10.2

- -------------------------------------------------------------------------------
Portions of this Exhibit 10.2 have been redacted and are the subject of a 
confidential treatment request filed with the Secretary of the Securities and 
Exchange Commission
- -------------------------------------------------------------------------------
<PAGE>   2
                                                                Exhibit 10.2

                        COLLABORATIVE RESEARCH AGREEMENT

         This COLLABORATIVE RESEARCH AGREEMENT is entered into as of
December 31, 1991  by and between AMERICAN HOME PRODUCTS CORPORATION, a
corporation of the State of Delaware, U.S.A. , having its principal place of
business at 685 Third Avenue, New York, New York 10017, U.S.A. , as represented
by its agent, Wyeth-Ayerst Laboratories Division (hereinafter collectively
referred to as "Wyeth") and ONCOGENE SCIENCE, INC. (hereinafter referred to as
"OSI"), a corporation of the State of Delaware, having its principal place of
business at 106 Charles Lindbergh Blvd., Uniondale, New York 11553, U.S.A.

         WHEREAS, OSI was organized to develop, produce and market therapeutic
and diagnostic products for the treatment and early detection and monitoring of
human disease; and

         WHEREAS, OSI has developed proprietary gene transcription and gene
expression modulation technology and high throughput screening systems which may
be used to identify and develop novel transcription-based drugs; and

         WHEREAS, Wyeth has the capability to undertake research for the
discovery and evaluation of agents for the treatment of disease and also the
capability for clinical evaluation, manufacturing and marketing of such agents;
and

         WHEREAS, WYETH and OSI wish to enter into a collaborative research
agreement to identify and develop transcription-based drugs;

         NOW, THEREFORE, the parties agree as follows:

         1.       Definitions.

Whenever used in this Agreement, the terms defined in this Section 1 shall have
the meanings specified.

                  1.1.     "Affiliate" means any corporation or other legal
entity owning, directly or indirectly, fifty percent or more of the voting
capital shares or similar voting securities of Wyeth or OSI; or any corporation
or other legal entity fifty percent or more of the voting capital shares or
similar voting rights of which is owned, directly or indirectly, by Wyeth or
OSI.
<PAGE>   3
                  1.2.     "Annual Commitment" means the amount to be paid to
OSI by Wyeth to fund the Sponsored Research Program for any Commitment Year.

                  1.3.     "Allocated Overhead" means the amount of overhead,
including general and administrative costs, determined in accordance with
generally accepted accounting principles, incurred by OSI and allocated to the
Sponsored Research Program in the same proportion that the total man-hours of
work performed in the Sponsored Research Program bears to the total man-hours of
work performed in all OSI research programs, or such other customary allocation
basis that may be agreed in writing between the parties.

                  1.4.     "Annual Research Plan" means the written plan
describing the annual research concerning the Targets (including budgets) to be
carried out during each Commitment Year by OSI and Wyeth pursuant to this
Agreement, including both the Annual Sponsored Research Plan to be carried out
by OSI and the specific projects, timetables and technical goals to be pursued
by Wyeth and OSI.

                  1.5.     "Annual Sponsored Research Plan" means the written
plan describing the research concerning the Targets to be carried out during
each Commitment Year by OSI pursuant to this Agreement, including the specific
projects, timetables and technical goals to be pursued by OSI.  The Annual
Sponsored Research Plan for Commitment Years 1 and 2 is appended hereto as
Exhibit 1.

                  1.6.     "Research Program" is the collaborative research
program concerning the Targets that is to be conducted by Wyeth and OSI.

                  1.7.     "Sponsored Research Program" is that part of the
Research Program that is to be carried out by OSI.

                  1.8.     "Effective Date" is _________________________, 19__.

                  1.9.     "Target(s)" means each of those proteins identified
as a drug development target in the Annual Sponsored Research Plan appended to
this Agreement as Exhibit 1 concerning which proteins research projects will be
conducted to identify lead compounds from which transcription-based drugs may be
developed or derived, including all therapeutic indications identified in the
course of such research projects.

                  1.10.        "Contract Period" means the period beginning on
the Effective Date and ending on the date on which this Agreement terminates.

                                      -2-
<PAGE>   4
                  1.11.     "Commitment Year" means a twelve-month period
terminating on each anniversary of the Effective Date.

                  1.12.    "Technology" means and includes all technology and
technical information concerning a Target that pertains to the development of
human therapeutic products, including all laboratory notebooks, research plans,
inventions, cultures, strains, vectors, genes and gene fragments and their
sequences, cell lines, hybridoma cell lines, monoclonal and polyclonal
antibodies, proteins and protein fragments, non-protein chemical structures and
methods for synthesis, structure-activity relationships, computer models of
chemical structures, computer software, assay methodology, processes, materials
and methods for production, recovery and purification of natural products,
formulas, plans, specifications, characteristics, equipment and equipment
designs, marketing surveys and plans, business plans, know-how, experience and
trade secrets.

                  1.13.    "OSI Technology" means all Technology that pertains
to a Target and relates to transcriptional modulation of gene expression of the
gene encoding the Target, including all improvements thereto and the use of such
Technology to develop transcription-based drugs, that is or was:

                           (a)      developed by employees of, or consultants
                  to, OSI alone or jointly with third parties including Wyeth;
                  or

                           (b)      acquired by purchase, license, assignment or
                  other means from third parties by OSI.  OSI Technology shall
                  include all such Technology other than Wyeth Technology.

                  1.14.    "Wyeth Technology" means all Technology developed
through the use of OSI Technology that pertains to a Target and relates to
specific chemical compounds or drugs or the therapeutic use(s) of such compounds
or drugs, that is or was:

                           (a)      developed by employees of, or consultants
                  to, Wyeth alone or jointly with third parties including OSI;
                  or

                           (b)      acquired by purchase, license, assignment or
                  other means from third parties by Wyeth.

                  1.15.    "OSI Confidential Information" means all information
about any element of OSI Technology which is disclosed by OSI to Wyeth, orally
or in writing, and

                                      -3-
<PAGE>   5
designated "Confidential" in writing by OSI no later than thirty (30) days after
the time of disclosure to Wyeth to the extent that such information as of the
date of disclosure to Wyeth is not (i) known to Wyeth other than by virtue of a
prior confidential disclosure to Wyeth by OSI or (ii) disclosed in the published
literature, or otherwise generally known to the public, or (iii) obtained by
Wyeth from a third party free from any obligation of secrecy to OSI; provided,
however, that such third party has no obligation of confidentiality to Wyeth.

                  1.16.    "Wyeth Confidential Information" means all
information about any element of Wyeth Technology which is disclosed by Wyeth to
OSI, orally or in writing, and designated "Confidential" in writing by Wyeth no
later than thirty (30) days after the time of disclosure to OSI to the extent
that such information as of the date of disclosure to OSI is not (i) known to
OSI other than by virtue of a prior confidential disclosure to OSI by Wyeth or
(ii) disclosed in the published literature, or otherwise generally known to the
public, or (iii) obtained by OSI from a third party free from any obligation of
secrecy to Wyeth; provided, however, that such third party has no obligation of
confidentiality to OSI.

                  1.17.    "OSI Patent Rights" means all applications for
letters patent, whether domestic or foreign, which are encompassed within OSI
Technology, including all continuations, continuations-in-part, divisions,
renewals and patents of addition thereof, all letters patent granted thereon,
and all reissues and extensions thereof.

                  1.18.    "Wyeth Patent Rights" means all applications for
letters patent, whether domestic or foreign, which are encompassed within Wyeth
Technology, including all continuations, continuations-in-part, divisions,
renewals and patents of addition thereof, all letters patent granted thereon,
and all reissues and extensions thereof.

                  1.19.    "Valid Claim" means a claim within OSI Patent Rights
or Wyeth Patent Rights so long as such claim shall not have been disclaimed by
Wyeth or OSI, whichever is appropriate, or shall not have been held invalid in a
final decision rendered by a tribunal of competent jurisdiction from which no
appeal has been or can be taken.

                  1.20.    "Human Therapeutic Product" means any product for the
treatment or management of any disease state in a human patient or any other
human therapeutic indication derived from the Research Program in the course of
research concerning a Target.

                                      -4-
<PAGE>   6
                  1.21.    "Licensed Human Therapeutic Product" means a Human
Therapeutic Product that employs Wyeth Patent Rights, OSI Patent Rights, Wyeth
Technology or OSI Technology in its manufacture, use or sale.

                  1.22.    "Event of Termination" has the meaning set forth in
Section 9.3.

                  1.23.    "Funding Payments" has the meaning set forth in
Section 3.

                  1.24.    "Person" means any individual, estate, trust,
partnership, joint venture, association, firm, corporation, company, or other
entity.

                  1.25.    "Research Committee" has the meaning specified in
Section 2.2.

         2.       Collaborative Research Program.

                  2.1.1.   Purpose.  OSI and Wyeth shall conduct a collaborative
research program concerning the Targets (the "Research Program") throughout the
Contract Period.  The Research Program shall include, as a component, a research
program that shall be pursued by OSI and that shall be funded by Wyeth
throughout the Contract Period (the "Sponsored Research Program") . The
objective of the Research Program is to discover and develop Human Therapeutic
Products.

                  2.1.2.   Annual Research Plan.  The Annual Research Plan for
the first and second Commitment Years is described in Exhibit 1.  Wyeth shall
have the option to extend the Annual Research Plan beyond the second Commitment
Year, which extension shall be on the basis of mutual agreement of the parties.
For each Commitment Year after the first Commitment Year, an Annual Research
Plan shall be prepared by the Research Committee for submission to, and approval
by, Wyeth and OSI no later than sixty (60) days before the end of the prior
Commitment Year.  The Annual Research Plan and the Annual Sponsored Research
Plan for each Commitment Year shall be appended to and made part of this
Agreement.

                  2.1.3.   Exclusivity.

                           OSI agrees that during the Contract Period neither
OSI nor any of its Affiliates shall conduct research itself, or sponsor any
research, or engage in any research sponsored by any Person not a party to this
Agreement, if the objective of such research is to use any Target in the
discovery and development of Human Therapeutic Products.

                  2.2.     Research Committee.

                                      -5-
<PAGE>   7
                  2.2.1.   Purpose.  A Research Committee shall be established
by Wyeth and OSI to:

                  (a)      review, coordinate and evaluate progress under the
Annual Research Plan;

                  (b)      prepare the Annual Research Plan including the budget
for each Commitment Year; and

                  (c)      coordinate the OSI and Wyeth programs and the
exchange of information and materials that relate to the Research Program.

                  2.2.2.   Membership.  Wyeth and OSI each shall appoint, in
its sole discretion, an equal number of members to the Research Committee.
Substitutes may be appointed at any time.

              The members initially shall be:

         OSI Appointees:   ***

                           ***

                           ***


         Wyeth Appointees: ***

                           ***

                           ***


                  2.2.3.   Chair.  The Research Committee shall be chaired by
two co-chairpersons, one appointed by Wyeth and the other appointed by OSI.

                  2.2.4.   Meetings.  The Research Committee shall meet at
least quarterly, at places and on dates selected by each party in turn.
Representatives of Wyeth or OSI, or both, in addition to members of the Research
Committee, may attend such meetings at the invitation of both parties.

                  2.2.5    Minutes.  The Research Committee shall keep accurate
minutes of its deliberations which record all proposed decisions and all actions
recommended or taken.  The minutes shall be delivered to all Research Committee
members within five working days after each meeting.  The party hosting the
meeting shall be responsible for the preparation of the minutes.  Draft minutes
shall be edited by the co-chairpersons and shall be issued in final form only
with their approval and agreement.

***These portions deleted pursuant to a request for confidential treatment.


                                      -6-
<PAGE>   8
                  2.2.6.   Decisions.  Subject to the provisions of Section
2.1.2, all technical decisions of the Research Committee shall be made by
majority vote of.the members.  Business decisions shall be made by the
managements of Wyeth and OSI, in consultation with each other.  If the parties
are unable to agree, Wyeth shall have the final say in all technical and
business decisions.

                  2.2.7.   Expenses.  Wyeth and OSI shall each bear all expenses
of their respective members related to participation on the Research Committee.

          3.      Funding Payments.

                  3.1      The Annual Commitment for the first Commitment Year
is ***.  The Annual Commitment for the second Commitment Year is ***.

                  3.2      Payments by Wyeth to cover OSI's total, actual
research costs, plus Allocated Overhead, (the "Funding Payments") shall not
exceed the Annual Commitment in any Commitment Year, unless mutually agreed upon
by both parties.  The Annual Commitment for the second Commitment Year is based
on *** man-years per Target which is the expected average requirement, and is
subject to modification by mutual agreement if an unusually large number of lead
compounds are identified or if additional genetic constructs are required to be
constructed by OSI to facilitate lead development as specified in Exhibit 1.

                           3.2.1.   All Funding Payments shall be made quarterly
in advance for work scheduled to be performed by OSI during any three (3) month
period, against OSI's invoice for such three (3) month period. Adjustments as
necessary to reflect the work actually performed by OSI shall be made at the end
of each three (3) month period and shall be reflected in OSI's invoice for the
next three (3) month period.

                           3.2.2.   The amount of the Funding Payment for each
quarter shall be based on the work in progress pursuant to the applicable Annual
Sponsored Research Plan and the associated annual budget; provided, however,
that the aggregate amount of Funding Payments made in any Commitment Year shall
not exceed the Annual Commitment for such Commitment Year, unless approved in
advance by Wyeth.

                           3.2.3.   Each Funding Payment shall be paid on the
first day of the quarter or ten (10) days after receipt of the applicable
invoice, whichever is later.

*** These portions deleted pursuant to a request for confidential treatment.


                                      -7-
<PAGE>   9
         4.       Wyeth Rights and Obligations.

                  4.1.     Diligent Efforts.  Wyeth and OSI each shall use
reasonably diligent efforts to achieve the objectives of the Research Program.
OSI will use reasonably diligent efforts to pursue the research objectives
described in Exhibit 1 and Wyeth will use reasonably diligent efforts to assist
OSI in the pursuit of those objectives.  To achieve the objectives of the
Research Program, Wyeth will specifically use reasonably diligent efforts:

                           (a)       to advance the pharmacological assessment
of compounds identified by OSI in order to select those worthy of further
investigation;

                           (b)       to determine the chemical structure of the
selected compounds and to make related compounds to determine the relationship
between structure and activity and to identify potential development candidates;

                           (c)       to select development candidates;

                           (d)       to assess safety and efficacy of the
selected development candidates in animals and in human patients under
conditions designed to yield date suitable for inclusion in approval
applications to be submitted to the U.S. Food and Drug Administration; and

                           (e)       to develop manufacturing methods and
pharmaceutical formulations for those selected candidates.

         5.       Treatment of Confidential Information.

                  5.1.     Confidentiality.

                           5.1.1.   Wyeth and OSI each recognize that the
other's Confidential Information constitutes highly valuable proprietary,
confidential information.  Wyeth and OSI each agree that during the term of this
Agreement and for five (5) years thereafter, they will keep confidential all
Confidential Information that is disclosed to them or to any of their Affiliates
pursuant to this Agreement.  Neither Wyeth nor OSI nor any of their Affiliates
shall use such Confidential Information except as expressly permitted in this
Agreement.

                           5.1.2.   Wyeth and OSI acknowledge that the Wyeth and
OSI Confidential Information is highly valuable, proprietary, confidential
information, and agree that any disclosure of Confidential Information to any
officer, employee or agent of the other or of any of its Affiliates shall be
made only if, and to the extent, necessary to carry out its

                                      -8-
<PAGE>   10
responsibilities under this Agreement and shall be limited to the maximum extent
possible consistent with such responsibilities.  Each party agrees not to
disclose the other's Confidential Information to any third party under any
circumstance without written permission.  Each party shall take such action, and
shall cause its Affiliates to take such action, to preserve the confidentiality
of the other's Confidential Information as it would customarily take to preserve
the confidentiality of its own confidential information.  Each party, upon the
other's request, will return all the Confidential Information disclosed to it
pursuant to this Agreement, including all copies and extracts of documents
within sixty (60) days of the request after the termination of this Agreement.

                           5.1.3.   OSI represents that all of its employees
participating in the Research Program who shall have access to Wyeth
Confidential Information are bound by agreements to maintain such information in
confidence.  Consultants will be similarly bound.

                  5.2.     Publication.  Except as required to pursue patent
protection, the parties agree not to publish the results obtained in the course
of the Research Program unless mutually agreed, in which case the results may be
submitted for publication following scientific review by the Research Committee
and subsequent approval by OSI's and Wyeth's managements.

                  5.3.     Disclosure of Inventions.  Each party shall promptly
inform the other about all inventions that concern the Targets which are
conceived, made or developed in the course of carrying out the Research Program
by employees of, or consultants to, either of them solely, or jointly with
employees of, or consultants to, the other.  This Agreement shall not be
construed to obligate either party to disclose to the other any invention which
does not concern the Targets.

                  5.4.     Restrictions on Transferring Materials.  Wyeth and
OSI recognize that the biological, biochemical and chemical compounds and
materials which are part of OSI Technology or Wyeth Technology represent
valuable commercial assets.  Therefore, throughout the Contract Period and for
five (5) years thereafter, OSI and Wyeth each agree not to transfer to any third
party any such compound or material which constitutes Technology owned solely by
the other party.  Additionally, throughout the Contract Period and for six (6)
months thereafter, OSI and Wyeth each agree not to transfer to any third party

                                      -9-
<PAGE>   11
any such compound or material which constitutes Technology owned solely by it
unless prior consent for any such transfer is obtained from the other, which
consent shall not be unreasonably withheld, and unless such third party agrees
as a condition of any such transfer not to transfer the material further and to
use the material only for research purposes not directed toward the development
of Human Therapeutic Products.

         6.       Intellectual Property Rights.

                  6.1.     Ownership.  All OSI Technology and OSI Patent Rights
shall be owned solely by OSI regardless of whether such Technology or Patent
Rights are developed, conceived, discovered, or invented by employees of, or
consultants to, OSI solely or jointly with employees or, or consultants to,
Wyeth.  All Wyeth Technology and Wyeth Patent Rights shall be owned solely by
Wyeth regardless of whether such Technology or Patent Rights are developed,
conceived, discovered, or invented by employees of, or consultants to, Wyeth
solely or jointly with employees of, or consultants to, OSI.

                  6.2.     Filing, Prosecution and Maintenance of Patent Rights.
OSI shall have the exclusive right, at its expense and in its sole discretion to
file, prosecute, defend, enforce, and maintain OSI Patent Rights.  Wyeth shall
have the exclusive right, at its expense and in its sole discretion to file,
prosecute, defend, enforce and maintain Wyeth Patent Rights.

                  6.3.     Consultation Concerning Patent Rights.  OSI and Wyeth
shall each provide to the other copies of all patent applications within OSI
Patent Rights or Wyeth Patent Rights, respectively, which relate to the Targets
prior to filing such applications for the purpose of obtaining substantive
comments of the other's patent counsel.  Each party shall provide to the other
copies of all documents relating to prosecution of such patent applications in a
timely manner.  Each party shall provide to the other every six (6) months a
reporting detailing the status of all such patent applications.

         7.       Acquisition of Rights from Third Parties.  During the Contract
Period, OSI and Wyeth shall promptly notify each other in writing of any and all
opportunities to acquire in any manner from third parties, technology or patents
which may be useful in, or may relate to, the Research Program.  OSI and Wyeth
shall decide if such rights shall be acquired and, if so, whether by OSI or
Wyeth.  If acquired, such rights shall become OSI Technology or Wyeth
Technology, whichever is appropriate.

                                      -10-
<PAGE>   12
         8.       Option to Receive Exclusive Licenses: Other Agreements.

                  8.3.1.   OSI hereby grants to Wyeth an exclusive option to
obtain exclusive licenses on a Target by Target basis under the terms and
conditions set forth in the domestic and international License Agreements
appended hereto as Exhibits 2 and 3, respectively, with respect to any product
or products which may derive from the Collaborative Research Program in a Target
area.  Wyeth may exercise its option to obtain an exclusive license at any time
during the term of this Agreement as soon as a potential Human Therapeutic
Product in a Target area is identified through the Collaborative Research
Program and upon the giving of written notice to OSI of its exercise of the
option provided by this section 8.  It is further provided that Wyeth shall have
the right to identify a licensable Human Therapeutic Product in a specific
Target area for a period of up to one (1) year after the expiration of the
Collaborative Research Agreement.

                  8.3.2.   Wyeth agrees that it will not develop, manufacture,
use or sell any compound identified as a potential Human Therapeutic Product
through the Collaborative Research Program other than pursuant to the terms and
conditions of the License Agreements appended hereto.

                  8.3.3.   Other than the License Agreements appended hereto as
Exhibits 2 and 3, this Agreement is the sole agreement with respect to the
subject matter hereof.

         9.       Term, Extension, Termination and Disengagement.

                  9.1.     Term.  Unless sooner terminated or extended, this 
Agreement shall expire on September 30, 1995, subject to the early termination
provisions in Section 9.5.

                  9.2.     Extension.  Wyeth, at least four months prior to the
end of the term, shall notify OSI in writing if it desires to extend the
Sponsored Research Program. If OSI is willing to extend the Sponsored Research
Program on mutually acceptable terms, OSI must so notify Wyeth within forty-five
(45) days after receipt of Wyeth's notice. Wyeth and OSI shall thereafter
promptly negotiate in good faith terms of any extension to this Agreement.

                  9.3.     Events of Termination.  The following events shall 
constitute events of termination ("Events of Termination"):

                                      -11-
<PAGE>   13
                  (a)      any representation or warranty by OSI or Wyeth, or
any of its officers, under or in connection with this Agreement shall prove to
have been incorrect in any material respect when made;

                  (b)      OSI or Wyeth shall fail in any material respect to
perform or observe any term, convent or understanding contained in this
Agreement or in any of the other documents or instruments delivered pursuant to,
or concurrently with, this Agreement, and any such failure shall remain
unremedied for thirty (30) days after written notice to the failing party.

                  9.4.     Termination.

                           9.4.1.   Upon the occurrence of any Event of 
Termination, the party not responsible may, by notice to the other party,
terminate this Agreement.

                           9.4.2.   If Wyeth terminates this Agreement pursuant 
to Section 9.4.1, the License Agreements shall continue according to their
terms. If OSI terminates this Agreement pursuant to Section 9.4.1, the License
Agreements shall also terminate.

                  9.5.     Termination by Wyeth.  After this Agreement has been
in effect for a period of twenty (20) months, Wyeth may terminate this
Agreement, with or without cause, by giving OSI four (4) months notice at any
time after the expiration of said 20 month period. If Wyeth terminates this
Agreement pursuant to this section, it will make the Funding Payments which
would otherwise have been due for such four-month period and will retain all
rights set forth in any License Agreements then in effect subject to the
requirements of those Agreements.

         10.      Representations and Warranties.  OSI and Wyeth each represents
and warrants as follows:

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

                                      -12-
<PAGE>   14
                  10.2.    The execution, delivery and performance by it of this
Agreement have been duly authorized by all necessary corporate action and do not
and will not (a) require any consent or approval of its stockholders, (b)
violate any provision of any law, rule, regulation, order, writ, judgment,
injunction, decree, determination or award presently in effect having
applicability to it or any provision of its charter or by-laws or (c) result in
a breach of or constitute a default under any material agreement, mortgage,
lease, license, permit or other instrument or obligation to which it is a party
or by which it or its properties may be bound or affected.

                  10.3.    This Agreement is a legal, valid and binding 
obligation of it and is enforceable against it in accordance with its terms and
conditions, except as such enforceability may be limited by applicable
bankruptcy, insolvency, moratorium, reorganization or similar laws, from time to
time in effect, affecting creditor's rights generally.

                  10.4.    It is not under any obligation to any Person, 
contractual or otherwise, that is conflicting or inconsistent in any respect
with the terms of this Agreement or that would impede the diligent and complete
fulfillment of its obligations.

                  10.5.    It has good and marketable title to or valid leases
or licenses for, all of its properties, rights and assets necessary for the
fulfillment of its responsibilities and the Research Program, subject to no
claim of any third party other than the relevant lessors or licensors.

         11.      Notices.  All notices shall be mailed via certified mail, 
return receipt requested, or courier, addressed as follows, or to such other
address as may be designated from time to time:

                  If to Wyeth:     To Wyeth at its address as set forth at the
                                   beginning of this Agreement
                                   Attention:        Executive Vice President,
                                                     Wyeth-Ayerst Research

                                   with copy to:    Office of the General 
                                                    Counsel

                  If to OSI:       To OSI at its address as set forth at the 
                                   beginning of this Agreement
                                   Attention: President

                                      -13-
<PAGE>   15
Notices shall be deemed given as of the date of receipt.

         12.      Governing Law.  This Agreement shall be construed in 
accordance with the laws of the State of New York.

         13.      Miscellaneous.

                  13.1.    Binding Effect.  This Agreement shall be binding upon
and inure to the benefit of the parties and their respective legal
representatives, successors and permitted assigns.

                  13.2.    Headings.  Paragraph headings are inserted for 
convenience of reference only and do not form a part of this Agreement.

                  13.3.    Counterparts.  This Agreement may be executed 
simultaneously in two or more counterparts, each of which shall be deemed an
original.

                  13.4.    Amendment; Waiver; etc.  This Agreement may be 
amended, modified, superseded or canceled, and any of the terms may be waived,
only by a written instrument executed by each party or, in the case of waiver,
by the party or parties waiving compliance. The delay or failure of any part at
any time or times to require performance of any provision shall in no manner
affect its rights at a later time to enforce the same.

                  13.5.    No Third Party Beneficiaries.  No Person not a party
to this Agreement, including any employee of any party to this Agreement, shall
have or acquire any rights by reason of this Agreement. Nothing contained in
this Agreement shall be deemed to constitute the parties partners with each
other or any Person.

                  13.6.    Assignment and Successors.  This Agreement may not be
assigned by either party, in whole or in part, except to an Affiliate, to a
purchaser of all or substantially all of its assets or to any successor
corporation resulting from any merger or consolidation with or into such
corporation.

                                      -14-
<PAGE>   16
                  IN WITNESS WHEREOF, the parties have caused this Agreement to
be executed by their duly authorized representatives.

                                            AMERICAN HOME PRODUCTS CORPORATION


                                            By:_________________________________

                                            Title:______________________________


                                            ONCOGENE SCIENCE, INC.


                                            By:_________________________________

                                            Title:______________________________


                                      -15-
<PAGE>   17
                                    EXHIBIT 1



                         ANNUAL SPONSORED RESEARCH PLAN

                       FOR COMMITMENT YEARS 1 AND 2 OF THE

                          WYETH-AYERST/ONCOGENE SCIENCE

                        COLLABORATIVE RESEARCH AGREEMENT
<PAGE>   18
1.       Executive Summary

Oncogene Science has developed a proprietary gene transcription-based technology
to identify new drug leads. A summary reviewing the advantages of gene
transcription as an approach to drug discovery is attached in Appendix 1. A
collaboration with Wyeth-Ayerst Research is proposed to exploit this technology
in order to develop drugs in four therapeutic areas: non-insulin dependent 
diabetes, immunomodulation, asthma, and osteoporosis. The immediate goal is
to identify small molecular weight compounds which specifically modulate the
transcription of four target genes *** thereby either increasing or decreasing
the concentration of the corresponding protein product. ***.

***

***

*** These portions deleted pursuant to a request for confidential treatment.

                                      -2-
<PAGE>   19
2.       Program Overview

Oncogene Science has developed a unique drug discovery technology specifically
designed to identify compounds which affect the transcription of target genes.
Once a particular gene has been chosen as a target, the next step of the process
is to clone the regions of DNA which regulate expression of that gene. These
sequences are then fused to a highly sensitive reporter gene (the firefly 
luciferase gene) which generates a readily measurable signal in response to
changes in transcription of the target gene. This genetically engineered DNA
construct is then introduced into an appropriate cell type and stable lines
isolated. Such cell lines will generate a signal which reflects a change in gene
expression when an appropriate compound is added to the tissue culture media.
Lead identification is based upon very highthroughput drug screening, ie.,
screening up to 100,000 compounds or fermentation broths against each target in
a single year. To achieve this, a fully automated screening system has been
developed using state-of-the-art robotics developed at Oncogene Science.
Complete automation not only allows the primary screen to be cost effective, but
has proved essential to obtain highly quantitative and reproducible data from a
transcription based screen of this type. Each robotic system can analyze several
thousand samples per week against multiple target genes.

By using multiple targets in the primary screen, activity, cytotoxicity, and
initial gene specificity can be evaluated rapidly. ***. Compounds which are
active in the primary screen are immediately retested to establish an
EC(50)/cytotoxicity index. Automated on-line data reduction and statistical
analysis allows rapid quantitative determination to identify the initial lead
compounds. Complete data sets and lists of lead compounds can be provided in a
format compatible with Wyeth Ayerst's existing data analysis system. ***.
Appropriate tertiary assays and animal models can then be employed for the later
stages of lead development, and typically would be conducted at Wyeth-Ayerst.

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3.       Specific Targets

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<PAGE>   32
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<PAGE>   33
Appendix A

<TABLE>
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Payment Schedule
<S>                                 <C>     
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*Subject to approved work plan.

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                                      -17-
<PAGE>   34
Appendix B

Development/Screening Collaborative Program

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                                      -18-
<PAGE>   35
                                EXHIBIT 2

                            LICENSE AGREEMENT

         This LICENSE AGREEMENT is entered into as of ___________, 1991 (the
"Effective Date") by and between AMERICAN HOME PRODUCTS CORPORATION, a
corporation of the State of Delaware, U.S.A., having its principal place of
business at 685 Third Avenue, New York, New York 10017, U.S.A., as represented
by its agent, Wyeth-Ayerst Laboratories Division (hereinafter collectively
referred to as "Wyeth") and ONCOGENE SCIENCE, INC. (hereinafter referred to as
"OSI"), a corporation of the State of Delaware, having its principal place of
business at 106 Charles Lindbergh Blvd., Uniondale, New York 11553, U.S.A.

         In consideration of the mutual covenants and promises set forth in this
Agreement, the parties agree as follows:

1.       Definitions.

         The capitalized terms used in this Agreement shall have the meanings
specified for such terms in this Section 1 and in Section 1 of the Collaborative
Research Agreement to which this License Agreement is appended.

         1.1 "Collaborative Research Agreement" means the Collaborative Research
Agreement between Wyeth and OSI effective ___________, 1991.

         1.2 "Net Sales" means the gross sales by Wyeth or any sublicensee of
Wyeth for arm's-length sales to a third party or parties of Licensed Human
Therapeutic Products, less transportation, normal returns and allowance
(actually paid or allowed by Wyeth), customary discounts (whether cash or trade)
and sales or other taxes based on the sales prices whether

                                      -19-
<PAGE>   36
or not absorbed by Wyeth, but not including taxes assessed against income
derived from such sales.

         1.3     "Licensed Human Therapeutic Product" means a Human Therapeutic
Product that employs Wyeth Patents Rights, OSI Patent Rights, Wyeth Technology
or OSI Technology in its manufacture, use or sale.

         1.4     "Territory" means the United States of America, its territories
and possessions and the Commonwealth of Puerto Rico.

2.       Grant of Licenses.

         2.1     License Granted to Wyeth under OSI Patent Rights.

                 OSI grants to Wyeth the exclusive license, including the right
to grant sublicenses, to develop, make, use and sell Human Therapeutic Products
in the Territory under all OSI's right, title and interest in OSI Patent Rights.

         2.2     License Granted to Wyeth under OSI Technology.

                 OSI grants to Wyeth the exclusive license, including the right
to grant sublicenses, to develop, make, use and sell Human Therapeutic Products
in the Territory under all OSI's right, title and interest in OSI Technology.

         2.3     Term of License Grants.

                 2.3.1 The term of the grant set forth in Section 2.1 shall
commence on the Effective Date and shall terminate on the date of the last to
expire of OSI Patent Rights.

                 2.3.2 The term of the grant set forth in Section 2.2 shall
commence on the Effective Date and shall run perpetually.

                 2.3.3 Wyeth shall have a royalty-free license to manufacture,
use and sell

                                      -20-
<PAGE>   37
each Licensed Human Therapeutic Product in the Territory after the expiration of
Wyeth's last obligation to pay royalties on Net Sales of such Licensed Human
Therapeutic Product.

         2.4     Wyeth Obligations.

                 2.4.1 Wyeth shall use reasonably diligent efforts to
commercially develop Licensed Human Therapeutic Products. This requirement shall
be deemed satisfied with respect to any specific Target area if Wyeth is
developing any Human Therapeutic Product in that Target area. Such development
will be shown by semi-annual progress reports which demonstrate that the Human
Therapeutic Product remains an active candidate for filing in an Investigational
New Drug Application with the U.S. Food and Drug Administration. Wyeth shall
have an exclusive license to all Human Therapeutic Products arising from the
Collaborative Research Program in a Target Area so long as it satisfies its
development obligation with respect to any specific Target area as provided for
in this Section 2.4.1.

                 2.4.2 In the event that, in the course of its development of a
Human Therapeutic Product as provided for in Section 2.5.1, it becomes apparent,
in Wyeth's determination, that a Product or Products will not be commercially
viable, the parties agree to the following disposition of such Product or
Products:

                 a)    if the determination arises during or after the term of
the Collaborative Research Agreement, and the Product or Products are not the
sole development candidates in a specific Target area, the Product or Products
shall remain exclusively licensed to Wyeth;

                 b)    if the determination arises after expiration of the
Collaborative Research Agreement and if the Products are the sole development
candidate or candidates in a specific Target area, OSI shall have the option to
an exclusive license thereto, including the right to

                                      -21-
<PAGE>   38
grant sublicenses, under Wyeth Patent Rights and Wyeth Technology on terms to be
negotiated mutually by the parties.

         2.5     Technical Assistance.

                 OSI shall provide to Wyeth or any sublicensee of Wyeth, at
Wyeth's request and expense, any assistance reasonably necessary to enable Wyeth
or such sublicensee to manufacture, use or sell each Licensed Human Therapeutic
Product and to enjoy fully all the rights granted to Wyeth pursuant to this
Agreement.

3.       Royalties, Payments of Royalties, Accounting for Royalties Records.

         3.1     Patent and Tgchnology Rights.

                 Wyeth shall pay OSI a royalty based on the Net Sales of each
Licensed Human Therapeutic Product, the manufacture, use or sale of which would
infringe a Valid Claim within OSI Patent Rights or Wyeth Patent Rights if such
manufacture, use or sale were by an unlicensed third party or which employs OSI
Technology or Wyeth Technology. Such royalty shall be paid from the date of
first commercial sale of each such Licensed Human Therapeutic Product until the
expiration of the last applicable patent to expire or ten (10) years from the
date of such first commercial sale, whichever is later.

         3.2     Royalty Rates - Patent Rights and Technology.

                 Wyeth shall pay OSI a royalty of *** percent *** of Net Sales
of each Human Therapeutic Product licensed under Section 2.1 or 2.2. Only one
royalty will be due on Net Sales of any such Human Therapeutic Product.

         3.3     Payment Dates.

                 Royalties shall be paid by Wyeth on Net Sales within sixty (60)
days after the

*** These portions deleted pursuant to a request for confidential treatment.
                                      -22-
<PAGE>   39
end of each calendar quarter in which such Net Sales are made. Such payments
shall be accompanied by a statement showing the Net Sales of each Licensed Human
Therapeutic Product by Wyeth or any sublicensee of Wyeth and a calculation of
the amount of royalty due.

         3.4     Accounting.

                 No royalties on Net Sales shall be payable on sales
transactions between or among Wyeth and its Affiliates; the final vendee sale to
a third party alone shall be used for the purpose of determining the royalty
payments due hereunder. The Licensed Human Therapeutic Product subject to
royalty payment shall be deemed sold when invoiced, or if not invoiced, when the
same shall be shipped or delivered to the third party. All taxes, assessments
and fees of any nature levied or incurred on account of any payments accruing
under this Agreement, by national, state or local governments, will be assumed
and paid by Wyeth except taxes levied thereon as income to OSI and if such taxes
are required to be withheld by Wyeth, they will be deducted from such payments
due to OSI and will be paid by Wyeth for the account of OSI, and a receipt
therefor secured and sent to OSI.

         3.5     Records.

                 Wyeth shall keep for three (3) years from the date of each
payment of royalties complete and accurate records of sales by Wyeth of each
Licensed Human Therapeutic Product in sufficient detail to allow the accruing
royalties to be determined accurately. OSI shall have the right for a period of
three (3) years after receiving any report or statement with respect to
royalties due and payable to appoint at its expense an independent certified
public accountant reasonably acceptable to Wyeth to inspect the relevant records
of Wyeth to verify

                                      -23-
<PAGE>   40
such report or statement. Wyeth shall make its records available for inspection
by such independent certified public accountant during regular business hours at
such place or places where such records are customarily kept, upon reasonable
notice from OSI, to the extent reasonably necessary to verify the accuracy of
the reports and payments. Such inspection right shall not be exercised more than
once in any calendar year nor more than once with respect to sales in any given
period. OSI agrees to hold in strict confidence all information concerning
royalty payments and reports, and all information learned in the course of any
audit or inspection, except to the extent it is necessary for OSI to reveal such
information in order to enforce its rights under this Agreement or if disclosure
is required by law. The failure of OSI to request verification of any report or
statement during said three-year period shall be considered acceptance of the
accuracy of such report, and Wyeth shall have no obligation to maintain records
pertaining to such report or statement beyond said three-year period. The
results of the inspection shall be binding on both parties.

4.       Legal Action.

         4.1.1   Actual or Threatened Disclosure or Infringement of Wyeth Patent
                 Rights or Technology
                                                                   

                 When information comes to the attention of Wyeth to the effect
that any Wyeth Patent Rights or Technology relating specifically to a Licensed
Human Therapeutic Product have been, or are threatened to be, unlawfully
disclosed or that any of the exclusive rights granted by this Agreement has been
or is threatened to be unlawfully infringed, Wyeth shall have the right at its
expense to take such action as it may deem necessary to prosecute or prevent
such unlawful disclosure or infringement, including the right to bring or defend
any

                                      -24-
<PAGE>   41
suit, action or proceeding involving any such disclosure or infringement. Wyeth
shall notify OSI promptly of the receipt of any such information and of the
commencement of any such suit, action or proceeding. If Wyeth determines that it
is necessary or desirable for OSI to join any such suit, action or proceeding,
OSI shall execute all papers and perform such other acts as may be reasonably
required to permit Wyeth to act in OSI's name. In the event that Wyeth brings a
suit, it shall have the right first to reimburse itself out of any sums
recovered in such suit or insist settlement for all reasonable costs and
expenses of every kind and character, including reasonable attorney's fees,
involved in the prosecution of any suit, and *** percent *** of any funds that
shall remain from said recovery shall be distributed to OSI and the balance of
such funds shall be retained by Wyeth. If Wyeth does not, within one hundred
twenty (120) days after giving notice to OSI of the above-described information,
notify OSI of Wyeth's intent to bring suit against any infringer, OSI shall have
the right to bring suit for such alleged infringement, but it shall not be
obligated to so do, and may join Wyeth as party plaintiff, if appropriate, in
which event OSI shall hold Wyeth free, clear and harmless from any and all costs
and expenses of such litigation, including attorney's fees, and any sums
recovered in any such suit or in its settlement shall belong to OSI. However,
*** percent *** of any such sums received by OSI, after deduction of the costs
and expenses of litigation, including attorney's fees paid, shall be paid to
Wyeth. Each party shall always have the right to be represented by counsel of
its own selection and at its own expense in any suit instituted by the other for
infringement, under the terms of this Section 4.1.1. If Wyeth lacks standing to
bring any such suit, action or proceeding, then OSI shall do so at the request
of Wyeth and at Wyeth's expense.

*** These portions deleted pursuant to a request for confidential treatment.

                                      -25-
<PAGE>   42
         4.1.2   Actual or Threatened Disclosure or Infringement of OSI Patent
                 Rights or Technology
                                                              

                 When information comes to the attention of OSI to the effect
that any OSI Patent Rights or Technology relating specifically to a Licensed
Human Therapeutic Product have been, or are threatened to be, unlawfully
disclosed or that any of the exclusive rights granted by this Agreement has
been, or is threatened to be, unlawfully infringed, OSI shall have the right at
its expense to take such action as it may deem necessary to prosecute or prevent
such unlawful disclosure or infringement, including the right to bring or defend
any suit, action or proceeding involving any such disclosure or infringement.
OSI shall notify Wyeth promptly of the receipt of any such information and of
the commencement of any such suit, action or proceeding. If Wyeth determines
that it is necessary or desirable for Wyeth to join any such suit, action or
proceeding, Wyeth shall execute all papers and perform such other acts as may be
reasonably required to permit OSI to act in Wyeth's name. In the event that OSI
brings a suit, it shall have the right first to reimburse itself out of any sums
recovered in such suit or in its settlement for all reasonable costs and
expenses of every kind and character, including reasonable attorney's fees,
involved in the prosection of any suit, and *** percent *** of any funds that
shall remain from said recovery shall be distributed to Wyeth and the balance of
such funds shall be retained by OSI. If OSI does not, within one hundred twenty
(120) days after giving notice to Wyeth of the above-described information,
notify Wyeth of OSI's intention to bring suit against any infringer, Wyeth shall
have the right to bring suit for such alleged infringement, but it shall not be
obligated to do so, and may join OSI as party plaintiff, if appropriate, in
which event Wyeth shall hold OSI

*** These portions deleted pursuant to a request for confidential treatment.

                                      -26-
<PAGE>   43
free, clear and harmless from any and all costs and expenses of such litigation,
including attorney's fees, and any sums recovered in any such suit or in its
settlement shall belong to Wyeth. However, *** percent *** of any such sums
received by Wyeth, after deduction of the costs and expenses of litigation,
including attorney's fees paid, shall be paid to OSI. Each party shall always
have the right to be presented by counsel of its own selection and at its own
expense in any suit instituted by the other for infringement, under the terms of
this Section 4.1.2. If OSI lacks standing to bring any such suit, action or
proceeding, then Wyeth shall do so at the request of OSI and at OSI's expense.

         4.2     Defense of Infringement Claims.

                 OSI will cooperate with Wyeth at Wyeth's expense in the defense
of any suit, action or proceeding against Wyeth or any sublicensee of Wyeth
alleging the infringement of the intellectual property rights of a third party
by reason of the use of Patent Rights or Technology in the manufacture, use or
sale of any Licensed Human Therapeutic Product. Wyeth shall give OSI prompt
written notice of the commencement of any such suit, action or proceeding or
claim of infringement and will furnish OSI a copy of each communication relating
to the alleged infringement. OSI shall give to Wyeth all authority (including
the right to exclusive control of the defense of any such suit, action or
proceeding and the exclusive right to compromise, litigate, settle or otherwise
dispose of any such suit, action or proceeding), information and assistance
necessary to defend or settle any such suit, action or proceeding. If the
parties agree that OSI should institute or join any suit, action or proceeding
pursuant to this Section 4.2, Wyeth may join OSI as a defendant if necessary or
desirable, and OSI at Wyeth's expense shall executive all documents and take all
other

*** These portions deleted pursuant to a request for confidential treatment.

                                      -27-
<PAGE>   44
actions, including giving testimony, which may reasonably be required in
connection with the prosecution of such suit, action or proceeding.

         4.3     Hold Harmless.

                 OSI agrees to defend, protect, indemnify and hold harmless
Wyeth and any sublicensee of Wyeth, from and against any loss or expense arising
from any proven claim of a third party that it has been granted rights by OSI
that Wyeth or any sublicensee of Wyeth in exercising the rights granted to Wyeth
by OSI pursuant to this Agreement, has infringed upon such rights granted to
such third party by OSI. Wyeth agrees to defend, protect, indemnify and hold
harmless OSI from and against any liability, claim, loss, cost or expense
arising from any claim for liability based upon Wyeth's manufacture, use or sale
of any Licensed Human Therapeutic Product.

         4.4     Third Party License.

                 If the manufacture, use or sale by Wyeth of a Licensed Human
Therapeutic Product would, in the opinion of both Wyeth and OSI, infringe a
patent owned by a third party, Wyeth and OSI shall attempt to obtain a license
under such patent. If Wyeth obtains a license under such patent, (fifty) percent
(50%) of any payments made by Wyeth to such third party shall be deductible from
royalty payments due from Wyeth to OSI pursuant to this Agreement; provided,
however, that in no event shall royalties payable to OSI be reduced by more than
twenty-five percent (25%) as a result of all such deductions. All such
computations, payments, and adjustments shall be on a patent by patent basis. If
OSI is of the opinion that such manufacture, use or sale would not infringe such
patent owned by a third party, OSI may, at its election, bring suit against such
third party seeking a declaration

               
                                      -28-
<PAGE>   45
that such patent is invalid or not infringed by Wyeth's manufacture, use or sale
of the Licensed Human Therapeutic Product involved, or may bring opposition,
nullity or other proceedings against such patent, as appropriate. If OSI is
successful in such suit, Wyeth shall continue to pay royalties in such country
as provided in Section 3. If OSI is unsuccessful in such suit, it shall join
Wyeth in an attempt to obtain a license under such patent, and fifty percent
(50%) of any payments made by Wyeth to such third party for such license shall
be deductible from royalty payments due from Wyeth to OSI as to that patent
pursuant to this Agreement.

5.       Termination by Wyeth

         Wyeth may terminate this Agreement at any time without cause by giving
OSI at least six (6) months notice prior to the termination date. Such
termination will not affect the rights and obligations of the parties accrued
prior to the termination, including the right of OSI to receive royalties on
subsequent sales of Licensed Human Therapeutic Products, and OSI shall be
entitled to an exclusive license under Wyeth Patent Rights and Wyeth Technology
in the Target area(s) on the same terms under which Wyeth is exclusively
licensed under OSI Patent Rights and OSI Technology as provided for in this
Agreement.

6.       Representation and Warranty.

         OSI and Wyeth represent and warrant to each other that they have the
right to grant to each other the licenses granted to them pursuant to this
Agreement, and that the licenses so granted do not conflict with or violate the
terms of any agreement between either of them and any third party.

7.       Notices.  All notices shall be mailed via certified mail, return 
receipt requested, or


                                      -29-
<PAGE>   46
courier, addressed as follows, or to such other address as may be designated
from time to time:

         If to Wyeth:     To Wyeth at its address as set forth at the beginning
                          of this Agreement

                          Attention:       President,
                                           Wyeth-Ayerst Laboratories

                          with copy to: Office of the General Counsel

         If to OSI:       To OSI at its address as set forth at the beginning of
                          this Agreement

                          Attention: President

Notices shall be deemed given as of the date of receipt.

8.       Additional Terms.

         The following terms of the Collaborative Research Agreement are
incorporated into this Agreement as if set forth verbatim:

         (a)     Sections 9.3 and 9.4;

         (b)     Sections 5.1 and 5.2;

         (c)     Sections 6.1 through 6.3, inclusive;

         (d)     Section 12; and

         (e)     Section 13.

         IN WITNESS WHEREOF, the parties have caused this Agreement to be
executed by their duly authorized representatives.

                                              AMERICAN HOME PRODUCTS CORPORATION

                                              By_____________________________

                                      -30-
<PAGE>   47
                                              Title____________________________

                                              ONCOGENE SCIENCE, INC.

                                              By_____________________________

                                              Title___________________________

                                      -31-
<PAGE>   48
                                EXHIBIT 3

                            LICENSE AGREEMENT

         This LICENSE AGREEMENT is entered into as of ___________, 1991 (the
"Effective Date") by and between AMERICAN HOME PRODUCTS CORPORATION, a
corporation of the State of Delaware, U.S.A., having its principal place of
business at 685 Third Avenue, New York, New York 10017, U.S.A., as represented
by its agent, Wyeth-Ayerst Laboratories Division (hereinafter collectively
referred to as "Wyeth") and ONCOGENE SCIENCE, INC. (hereinafter referred to as
"OSI"), a corporation of the State of Delaware, having its principal place of
business at 106 Charles Lindbergh Blvd., Uniondale, New York 11553, U.S.A.

         In consideration of the mutual covenants and promises set forth in this
Agreement, the parties agree as follows:

1.       Definitions.

         The capitalized terms used in this Agreement shall have the meanings
specified for such terms in this Section 1 and in Section 1 of the Collaborative
Research Agreement to which this License Agreement is appended.

         1.1 "Collaborative Research Agreement" means the Collaborative Research
Agreement between Wyeth and OSI effective ___________, 1991.

         1.2 "Net Sales" means the gross sales by Wyeth or any sublicensee of
Wyeth for arm's length sales to a third party or parties of Licensed Human
Therapeutic Products, less transportation, normal returns and allowance
(actually paid or allowed by Wyeth), customary discounts (whether cash or trade)
and sales or other taxes based on the sales prices whether

                                      -32-
<PAGE>   49
or not absorbed by Wyeth, but not including taxes assessed against income
derived from such sales.

         1.3 "Licensed Human Therapeutic Product" means a Human Therapeutic
Product that employs Wyeth Patent Rights, OSI Patent Rights, Wyeth Technology,
or OSI Technology in its manufacture, use or sale.

         1.4 "Territory" means all countries of the world, except the United
States of America, its territories and possessions and the Commonwealth of
Puerto Rico.

2.       Grant of Licenses.

         2.1     License Granted to Wyeth under OSI Patent Rights.

                 OSI grants to Wyeth the exclusive license, including the right
to grant sublicenses, to develop, make, use and sell Human Therapeutic Products
in the Territory under all OSI's right, title and interest in OSI Patent Rights.

         2.2     License Granted to Wyeth under OSI Technology.

                 OSI grants to Wyeth the exclusive license, including the right
to grant sublicenses, to develop, make, use and sell Human Therapeutic Products
in the Territory under all OSI's right, title and interest in OSI Technology.

         2.3     Term of License Grants.

                 2.3.1 The term of the grant set forth in Section 2.1 shall
commence on the Effective Date and shall terminate on the date of the last to
expire of OSI Patent Rights.

                 2.3.2 The term of the grant set forth in Section 2.2 shall
commence on the Effective Date and shall run perpetually, except in those
countries of the Territory in which such term is limited by law.

                                      -33-
<PAGE>   50
                 2.3.3 Wyeth shall have a royalty-free license to manufacture,
use and sell each Licensed Human Therapeutic Product in each country of the
Territory after the expiration of Wyeth's last obligation to pay royalties on
Net Sales of each such Licensed Human Therapeutic Product in each such country.

         2.4     Wyeth Obligations.

                 2.4.1 Wyeth shall use reasonably diligent efforts to
commercially develop Licensed Human Therapeutic Products. This requirement shall
be deemed satisfied with respect to any specific Target area if Wyeth is
developing any Human Therapeutic Product in that Target area. Such development
will be shown by semi-annual progress reports which demonstrate that the Human
Therapeutic Product remains an active candidate for the filing of a foreign
equivalent of an Investigational New Drug Application. Wyeth shall have an
exclusive license to all Human Therapeutic Products arising from the
Collaborative Research Program in a Target Area so long as it satisfies its
development obligation with respect to any specific Target area as provided for
in this Section 2.4.1.

                 2.4.2 In the event that, in the course of its development of a
Human Therapeutic Product as provided for in Section 2.4.1, it becomes apparent,
in Wyeth's determination, that a Product or Products will not be commercially
viable, the parties agree to the following disposition of such Product or
Products:

                 a)    if the determination arises during or after the term of
the Collaborative Research Agreement, and the Product or Products are not the
sole development candidates in a specific Target area, the Product or Products
shall remain exclusively licensed to Wyeth;

                 b)    if the determination arises after expiration of the
Collaborative Research

                                      -34-
<PAGE>   51
Agreement and if the Products are the sole development candidate or candidates
in a specific Target area, OSI shall have the option to an exclusive license
thereto, including the right to grant sublicenses, under Wyeth Patent Rights and
Wyeth Technology on terms to be negotiated mutually by the parties.

         2.5     Technical Assistance.

                 OSI shall provide to Wyeth or any sublicensee or Direct
Licensee of Wyeth at Wyeth's request and expense, any assistance reasonably
necessary to enable Wyeth or such sublicensee or Direct Licensee to manufacture,
use or sell each Licensed Human Therapeutic Product and to enjoy fully all the
rights granted to Wyeth pursuant to this Agreement.

3.       Royalties, Payments of Royalties, Accounting for Royalties, Records.

         3.1     Patent and Technology Rights.

                 Wyeth shall pay OSI a royalty based on the Net Sales in each
country of each Licensed Human Therapeutic Product, the manufacture, use or sale
of which would infringe a Valid Claim within OSI Patent Rights or Wyeth Patent
Rights if such manufacture, use or sale were by an unlicensed third party or
which employs OSI Technology of Wyeth Technology. Such royalty shall be paid in
each country of the Territory from the date of first commercial sale of each
such Licensed Human Therapeutic Product in each such country until the
expiration of the last applicable patent to expire with respect to each such
country or ten (10) years from the date of such first commercial sale in each
such country, whichever is later.

         3.2     Royalty Rates - Patent Rights and Technology.

                 Wyeth shall pay OSI a royalty of *** percent *** of Net Sales
of each

***These portions deleted pursuant to a request for confidential treatment.

                                      -35-
<PAGE>   52
Human Therapeutic Product licensed under Section 2.1 or 2.2. Only one royalty
will be due on Net Sales of any such Human Therapeutic Product.

         3.3     Direct Licensees.

                 Wyeth may, at any time, request from OSI and OSI agrees to
grant directly to any party ("Direct Licensee(s)") in any country of the
Territory exclusive license rights consistent with those granted to Wyeth
herein. Accordingly, upon receipt of Wyeth's request, OSI shall enter into and
sign a separate direct license agreement or agreements with the companies
designated by Wyeth in the request. All direct agreements shall be prepared by
Wyeth. In the event that the laws and regulations of the country(ies) require
modification of the royalty rate, duration and/or terms and conditions, the
direct licenses to Direct Licensees shall be so modified. In the absence or upon
the expiration of such laws and regulations, the terms and conditions of any
such direct license shall not be less favorable to OSI than those contained in
this Agreement. In those countries in which the validity of such direct license
requires prior governmental approval or registration, such direct license shall
not be binding or have any force or effect until the required governmental
approval or registration has been granted.

         3.4     Payment Dates.

                 Royalties shall be paid by Wyeth on Net Sales within sixty (60)
days after the end of each calendar quarter in which such Net Sales are made.
Such payments shall be accompanied by a statement showing the Net Sales of each
Licensed Human Therapeutic Product by Wyeth or any sublicensee of Wyeth in each
country of the Territory and a calculation of the amount of royalty due.

                                      -36-
<PAGE>   53
         3.5     Accounting.

                 (a)   The royalties provided for herein shall accrue and be
payable in the national currency of the country where the sale on which payment
is based was made, provided that:

                       (i)   if law or regulation permits the conversion of such
currency into U.S. currency, the same shall be converted into the equivalent
value in U.S. currency at the applicable rate of exchange existing at the time
of conversion and paid in U.S. currency to OSI at the place of payment;

                       (ii)  if the conversion into and/or remittance of U.S.
currency is subject to administrative authorization, appropriate action will be
taken with the competent authorities to apply diligent efforts to obtain such
authorization so as to pay the royalty in U.S. currency within the time
stipulated for payment of the royalty;

                       (iii) if by law, regulations or fiscal policy of a
country conversion into or transfer of U.S. currency is restricted or forbidden,
notice thereof in writing will be given to OSI and payment of the royalty shall
be made through such lawful means or method as OSI may designate and at OSI's
expense. Failing the designation by OSI of such lawful means or method as
aforesaid within a period of sixty (60) days after the aforementioned notice is
given to OSI, the payment of such royalty by Wyeth shall be made by the deposit
thereof in local currency to the credit of OSI in a recognized banking
institution designated by OSI or if none be designated by it within the period
of sixty (60) days as aforesaid then in a recognized banking institution
notified to OSI; and

                 (b)   Except for those instances provided for by subsections
(i), (ii) and (iii)

                                      -37-
<PAGE>   54
above, Wyeth shall guarantee the determination and payment of royalties on all
sales made by Wyeth, and its sublicensees and Direct Licensees.

                 (c) All taxes, assessments and fees of any nature levied or
incurred on account of any payments accruing under this Agreement, by national,
state or local governments, will be assumed and paid by Wyeth except taxes
levied thereon as income to OSI and if such taxes are required to be withheld by
Wyeth, they will be deducted from such payments due to OSI and will be paid by
Wyeth for the account of OSI, and a receipt therefor secured and sent to OSI.

         3.6     Records.

                 Wyeth shall keep for three (3) years from the date of each
payment of royalties complete and accurate records of sales by Wyeth of each
Licensed Human Therapeutic Product in sufficient detail to allow the accruing
royalties to be determined accurately. OSI shall have the right for a period of
three (3) years after receiving any report or statement with respect to
royalties due and payable to appoint at its expense an independent certified
public accountant reasonably acceptable to Wyeth to inspect the relevant records
of Wyeth to verify such report or statement. Wyeth shall make its records
available for inspection by such independent certified public accountant during
regular business hours at such place or places where such records are
customarily kept, upon reasonable notice from OSI, to the extent reasonably
necessary to verify the accuracy of the reports and payments. Such inspection
right shall not be exercised more than once in any calendar year nor more than
once with respect to sales in any given period. OSI agrees to hold in strict
confidence all information concerning royalty payments and reports, and all
information learned in the course of any

                                      -38-
<PAGE>   55
audit or inspection, except to the extent it is necessary for OSI to reveal such
information in order to enforce its rights under this Agreement or if disclosure
is required by law. The failure of OSI to request verification of any report or
statement during said three-year period shall be considered acceptance of the
accuracy of such report, and Wyeth shall have no obligation to maintain records
pertaining to such report or statement beyond said three-year period. The
results of the inspection shall be binding on both parties.

4.       Legal Action.

         4.1.1   Actual or Threatened Disclosure or Infringement of Wyeth Patent
                 Rights or Technology
                                                                 

                 When information comes to the attention of Wyeth to the effect
that any Wyeth Patent Rights or Technology relating specifically to a Licensed
Human Therapeutic Product have been, or are threatened to be, unlawfully
disclosed or that any of the exclusive rights granted by this Agreement has been
or is threatened to be unlawfully infringed, Wyeth shall have the right at its
expense to take such action as it may deem necessary to prosecute or prevent
such unlawful disclosure or infringement, including the right to bring or defend
any suit, action or proceeding involving any such disclosure or infringement.
Wyeth shall notify OSI promptly of the receipt of any such information and of
the commencement of any such suit, action or proceeding. If Wyeth determines
that it is necessary or desirable for OSI to join any such suit, action or
proceeding, OSI shall execute all papers and perform such other acts as may be
reasonably required to permit Wyeth to act in OSI's name. In the event that
Wyeth brings a suit, it shall have the right first to reimburse itself out of
any sums recovered in such suit or insist settlement for all reasonable costs
and expenses of every kind and

                                      -39-
<PAGE>   56
character, including reasonable attorney's fees, involved in the prosecution of
any suit, and *** percent *** of any funds that shall remain from said
recovery shall be distributed to OSI and the balance of such funds shall be
retained by Wyeth. If Wyeth does not, within one hundred twenty (120) days after
giving notice to OSI of the above-described information, notify OSI of Wyeth's
intent to bring suit against any infringer, OSI shall have the right to bring
suit for such alleged infringement, but it shall not be obligated to so do, and
may join Wyeth as party plaintiff, if appropriate, in which event OSI shall hold
Wyeth free, clear and harmless from any and all costs and expenses of such
litigation, including attorney's fees, and any sums recovered in any such suit
or in its settlement shall belong to OSI. However, *** percent *** of any such
sums received by OSI, after deduction of the costs and expenses of litigation,
including attorney's fees paid, shall be paid to Wyeth. Each party shall always
have the right to be represented by counsel of its own selection and at its own
expense in any suit instituted by the other for infringement, under the terms of
this Section 4.1.1. If Wyeth lacks standing to bring any such suit, action or
proceeding, then OSI shall do so at the request of Wyeth and at Wyeth's expense.

         4.1.2   Actual or Threatened Disclosure or Infringement of OSI Patent
                 Rights or Technology
                                                                      

                 When information comes to the attention of OSI to the effect
that any OSI Patent Rights or Technology relating specifically to a Licensed
Human Therapeutic Product have been, or are threatened to be, unlawfully
disclosed or that any of the exclusive rights granted by this Agreement has
been, or is threatened to be, unlawfully infringed, OSI shall have the right at
its expense to take such action as it may deem necessary to prosecute or

*** These portions deleted pursuant to a request for confidential treatment.


                                      -40-
<PAGE>   57
prevent such unlawful disclosure or infringement, including the right to bring
or defend any suit, action or proceeding involving any such disclosure or,
infringement. OSI shall notify Wyeth promptly of the receipt of any such
information and of the commencement of any such suit, action or proceeding. If
Wyeth determines that it is necessary or desirable for Wyeth to join any such
suit, action or proceeding, Wyeth shall execute all papers and perform such
other acts as may be reasonably required to permit OSI to act in Wyeth's name.
In the event that OSI brings a suit, it shall have the right first to reimburse
itself out of any sums recovered in such suit or in its settlement for all
reasonable costs and expenses of every kind and character, including reasonable
attorneys fees, involved in the prosection of any suit, and *** percent *** of
any funds that shall remain from said recovery shall be distributed to Wyeth and
the balance of such funds shall be retained by OSI. If OSI does not, within one
hundred twenty (120) days after giving notice to Wyeth of the above-described
information, notify Wyeth of OSI's intention to bring suit against any
infringer, Wyeth shall have the right to bring suit for such alleged
infringement, but it shall not be obligated to do so, and may join OSI as party
plaintiff, if appropriate, in which event Wyeth shall hold OSI free, clear and
harmless from any and all costs and expenses of such litigation, including
attorney's fees, and any sums recovered in any such suit or in its settlement
shall belong to Wyeth. However, *** percent *** of any such sums received by
Wyeth, after deduction of the costs and expenses of litigation, including
attorney's fees paid, shall be paid to OSI. Each party shall always have the
right to be presented by counsel of its own selection and at its own expense in
any suit instituted by the other for infringement, under the terms of this
Section 4.1.2. If OSI lacks standing to bring any such suit, action or
proceeding, then Wyeth

*** These portions deleted pursuant to a request for confidential treatment.

                                      -41-
<PAGE>   58
shall do so at the request of OSI and at OSI's expense.

         4.2     Defense of Infringement Claims.

                 OSI will cooperate with Wyeth at Wyeth's expense in the defense
of any suit, action or proceeding against Wyeth or any sublicensee of Wyeth
alleging the infringement of the intellectual property rights of a third party
by reason of the use of Patent Rights or Technology in the manufacture, use or
sale of any Licensed Human Therapeutic Product. Wyeth shall give OSI prompt
written notice of the commencement of any such suit, action or proceeding or
claim of infringement and will furnish OSI a copy of each communication relating
to the alleged infringement. OSI shall give to Wyeth all authority (including
the right to exclusive control of the defense of any such suit, action or
proceeding and the exclusive right to compromise, litigate, settle or otherwise
dispose of any such suit, action or proceeding), information and assistance
necessary to defend or settle any such suit, action or proceeding pursuant to
this Section 4.2. Wyeth may join OSI as a defendant if necessary or desirable,
and OSI at Wyeth's expense shall executive all documents and take all other
actions, including giving testimony, which may reasonably be required in
connection with the prosecution of such suit, action or proceeding.

         4.3     Hold Harmless.

                 OSI agrees to defend, protect, indemnify and hold harmless
Wyeth and any sublicensee of Wyeth, from and against any loss or expense arising
from any proven claim of a third party that it has been granted rights by OSI
that Wyeth or any sublicensee of Wyeth in exercising the rights granted to Wyeth
by OSI pursuant to this Agreement, has infringed upon such rights granted to
such third party by OSI. Wyeth agrees to defend, protect,

                                      -42-
<PAGE>   59
indemnify and hold harmless OSI from and against any liability, claim, loss,
cost or expense arising from any claim for liability based upon Wyeth's
manufacture, use or sale of any Licensed Human Therapeutic Product.

         4.4     Third Party License.

                 If the manufacture, use or sale by Wyeth of a Licensed Human
Therapeutic Product in any country would, in the opinion of both Wyeth and OSI,
infringe a patent owned by a third party, Wyeth and OSI shall attempt to obtain
a license under such patent. If Wyeth obtains a license under such patent, fifty
percent (50%) of any payments made by Wyeth to such third party shall be
deductible from royalty payments due from Wyeth to OSI pursuant to this
Agreement; provided, however, that in no event shall royalties payable to OSI be
reduced by more than twenty-five percent (25%) as a result of all such
deductions. All such computations, payments, and adjustments shall be on a
country by country and patent by patent basis. If OSI is of the opinion that
such manufacture, use or sale would not infringe such patent owned by a third
party, OSI may, at its election, bring suit against such third party seeking a
declaration that such patent is invalid or not infringed by Wyeth's manufacture,
use or sale of the Licensed Human Therapeutic Product involved, or may bring
opposition, nullity or other proceedings against such patent, as appropriate. If
OSI is successful in such suit, Wyeth shall continue to pay royalties in such
country as provided in Section 3. If OSI is unsuccessful in such suit, it shall
join Wyeth in an attempt to obtain a license under such patent, and fifty
percent (50%) of any payments made by Wyeth to such third party for such license
shall be deductible from royalty payments due from Wyeth to OSI as to the patent
and that country pursuant to this Agreement.


                                      -43-
<PAGE>   60
5.       Treatment of Confidential Information.

         5.1     Confidentiality.

                 5.1.1 Wyeth and OSI each recognize that the other's
Confidential Information constitutes highly valuable proprietary, confidential
information. Wyeth and OSI each agree that during the term of this Agreement and
for five (5) years thereafter, they will keep confidential all Confidential
Information that is disclosed to them or to any of their Affiliates pursuant to
this Agreement. Neither Wyeth nor OSI nor any of their Affiliates shall use such
Confidential Information except as expressly permitted in this Agreement.

                 5.1.2 Wyeth and OSI acknowledge that the Wyeth and OSI
confidential Information is highly valuable, proprietary, confidential
information, and agree that any disclosure of Confidential Information to any
officer, employee or agent of the other or of any of its Affiliates shall be
made only if, and to the extent, necessary to carry out its responsibilities
under this Agreement and shall be limited to the maximum extent possible
consistent with such responsibilities. Each party agrees not to disclose the
other's Confidential Information to any third party under any circumstance
without written permission. Each party shall take such action, and shall cause
its Affiliates to take such action, to preserve the confidentiality of the
other's Confidential Information as it would customarily take to preserve the
confidentiality of its own confidential information. Each party, upon the
other's request, will return all the Confidential Information disclosed to it
pursuant to this Agreement, including all copies and extracts of documents
within sixty (60) days of the request after the termination of this Agreement.

                 5.1.3 OSI represents that all of its employees participating in
the Research

                                      -44-
<PAGE>   61
Program who shall have access to Wyeth Confidential Information are bound by
agreements to maintain such information in confidence. Consultants will be
similarly bound.

         5.2     Publication. Except as required to pursue patent protection,
the parties agree not to publish the results obtained in the course of the
Research Program unless mutually agreed in which case the results may be
submitted for publication following scientific review by the Research Committee
and subsequent approval by OSI's and Wyeth's managements.

6.       Intellectual Property Rights.

         6.1     Ownership. All OSI Technology and OSI Patent Rights shall be
owned solely by OSI regardless of whether such Technology or Patent Rights are
developed, conceived, discovered, or invented by employees of, or consultants
to, OSI solely or jointly with employees or, or consultants to, Wyeth. All Wyeth
Technology and Wyeth Patent Rights shall be owned solely by Wyeth regardless of
whether such Technology or Patent Rights are developed, conceived, discovered,
or invented by employees of, or consultants to, Wyeth solely or jointly with
employees of, or consultants to, OSI.

         6.2     Filing, Prosecution and Maintenance of Patent Rights. OSI shall
have the exclusive right, at its expense and in its sole discretion to file,
prosecute, defend, enforce, and maintain OSI Patent Rights. Wyeth shall have the
exclusive right, at its expense and in its sole discretion to file, prosecute,
defend, enforce and maintain Wyeth Patent Rights.

         6.3 Consultation Concerning Patent Rights. OSI and Wyeth shall
each provide to the other copies of all patent applications within OSI Patent
Rights or Wyeth Patent Rights, respectively, which relate to the Targets prior
to filing such applications for the purpose of obtaining substantive comments of
the other's patent counsel. Each party shall provide to the

                                      -45-
<PAGE>   62
other copies of all documents relating to prosecution of such patent
applications in a timely manner. Each party shall provide to the other every six
(6) months a reporting detailing the status of all such patent applications.

7.       Termination by Wyeth

         7.1     Wyeth may terminate this Agreement at any time without cause by
giving OSI at least six (6) months notice prior to the termination date. Such
termination will not affect the rights and obligations of the parties accrued
prior to the termination, including the right of OSI to receive royalties on
subsequent sales of Licensed Human Therapeutic Products, and OSI shall be
entitled to an exclusive license under Wyeth Patent Rights and Wyeth Technology
in the Target area(s) on the same terms under which Wyeth is exclusively
licensed under OSI Patent Rights and OSI Technology as provided for in this
Agreement.

         7.2     Events of Termination. The following events shall constitute
events of termination ("Events of Termination"):

                 (a) any representation or warranty by OSI or Wyeth, or any of
its officers, under or in connection with this Agreement shall prove to have
been incorrect in any material respect when made;

                 (b) OSI or Wyeth shall fail in any material respect to perform
or observe any term, convent or understanding contained in this Agreement or in
any of the other documents or instruments delivered pursuant to, or concurrently
with, this Agreement, and any such failure shall remain unremedied for thirty
(30) days after written notice to the failing party.

         7.3     Termination.

                                      -46-
<PAGE>   63
                 7.3.1 Upon the occurrence of any Event of Termination, the
party not responsible may, by notice to the other party, terminate this
Agreement.

                 7.3.2 If Wyeth terminates this Agreement pursuant to Section
9.4.1, the License Agreements shall continue according to their terms. If OSI
terminates this Agreement pursuant to Section 9.4.1, the License Agreements
shall also terminate.

8.       Representation and Warranty.

         OSI and Wyeth represent and warrant to each other that they have the
right to grant to each other the licenses granted to then pursuant to this
Agreement, and that the licenses so granted do not conflict with or violate the
terms of any agreement between either of them and any third party.

9.       Notices. All notices shall be mailed via certified mail, return receipt
requested, or courier, addressed as follows, or to such other address as may be
designated from time to time:

         If to Wyeth:    To Wyeth at its address as set forth at the beginning
                         of this Agreement

                         Attention:       President,
                                          Wyeth-Ayerst International, Inc.

                         with copy to:   Office of the General Counsel

         If to OSI:      To OSI at its address as set forth at the beginning of
                         this Agreement

                         Attention: President

Notices shall be deemed given as of the date of receipt.

10.      Governing Law.  This Agreement shall be construed in accordance with 
the laws of the State of New York.

11.      Miscellaneous.

                                      -47-
<PAGE>   64
         11.1    Binding Effect. This Agreement shall be binding upon and inure
to the benefit of the parties and their respective legal representatives,
successors and permitted assigns.

         11.2    Headings. Paragraph headings are inserted for convenience of
reference only and do not form a part of this Agreement.

         11.3    Counterparts. This Agreement may be executed simultaneously in
two or more counterparts, each of which shall be deemed an original.

         11.4    Amendment; Waiver; etc. This Agreement may be amended,
modified, superseded or canceled, and any of the terms may be waived, only by a
written instrument executed by each party or, in the case of waiver, by the
party or parties waiving compliance. The delay or failure of any part at any
time or times to require performance of any provision shall in no manner affect
its rights at a later time to enforce the same.

         11.5    No Third Party Beneficiaries. No Person not a party to this
Agreement, including any employee of any party to this Agreement, shall have or
acquire any rights by reason of this Agreement. Nothing contained in this
Agreement shall be deemed to constitute the parties partners with each other or
any Person.

         11.6 Assignment and Successors. This Agreement may not be
assigned by either part, in whole or in part, except to an Affiliate, to a
purchaser of all or substantially all of its assets or to any successor
corporation resulting from any merger or consolidation with or into such
corporation.

12.      Wyeth-Ayerst International, Inc., as an Agent of American Home Products
         Corporation
                                                         
                                                        

         American Home Products Corporation hereby appoints Wyeth-Ayerst
International,

                                      -48-
<PAGE>   65
Inc., as its sole and exclusive agent during the term of this Agreement for the
purpose of administrating on its behalf the rights and obligations under this
Agreement.

         IN WITNESS WHEREOF, the parties have caused this Agreement to be
executed by their duly authorized representatives.

                                              AMERICAN HOME PRODUCTS CORPORATION

                                              By_______________________________

                                              Title_____________________________

                                              ONCOGENE SCIENCE, INC.

                                              By_____________________________

                                              Title____________________________

                                      -49-

<PAGE>   1
                                                                   EXHIBIT 10.3

- -------------------------------------------------------------------------------
Portions of this Exhibit 10.3 have been redacted and are the subject of a 
confidential treatment request filed with the Secretary of the Securities and 
Exchange Commission.
- -------------------------------------------------------------------------------

<PAGE>   2
                                                                    Exhibit 10.3


                                 Conformed Copy
                          As Executed on March 5, 1993

                        COLLABORATIVE RESEARCH AGREEMENT

         This COLLABORATIVE RESEARCH AGREEMENT is entered into as of January 4,
1993 by and between HOECHST AKTIENGESELLSCHAFT ("HOECHST"), a German company
with the address of Bruningstrasse 50, Postfach 80 03 20, D-6230 Frankfurt am
Main 80, Germany and ONCOGENE SCIENCE, INC. ("OSI"), a Delaware corporation
having an office at 106 Charles Lindbergh Boulevard, Uniondale, New York 11553.

         WHEREAS, OSI was organized to develop, produce and market therapeutic
and diagnostic products for, among other things, the early detection, monitoring
and treatment of human disease; and

         WHEREAS, HOECHST has the capability to undertake research for the
discovery and evaluation of agents for treatment of disease and also the
capability for clinical analysis, manufacturing and marketing of such agents;
and

         WHEREAS, HOECHST and OSI wish to pursue the research described in this
Agreement;

         NOW, THEREFORE, the parties agree as follows:

         1.      Definitions

         Whenever used in this Agreement, the terms defined in this Section 1
shall have the meanings specified.

                 1.1   "Affiliate" means any entity of which the party in
question, directly or indirectly, owns thirty percent or more of the equity
capital. Unless the context otherwise
<PAGE>   3
requires, the rights granted under the Agreement shall extend to any Affiliate,
provided, however, that the other party hereto is notified in writing of the
identity and participation of such Affiliate and further provided that such
Affiliate shall observe the relevant provisions of this Agreement.

                 1.2   "Allocated Overhead" means the amount of overhead,
including general and administrative costs, determined in accordance with
generally accepted accounting principles, incurred by OSI and allocated to the
Sponsored Research Program in the same proportion that the total man-hours of
work performed in the Sponsored Research Program bears to the total man-hours of
work performed in all OSI research programs, or such other customary allocation
basis that may be agreed in writing between the parties.

                 1.3   "Annual Research Plan" means the written plan describing
the annual research and budgets concerning the Target Proteins to be carried out
during each Commitment Year by HOECHST and OSI pursuant to this Agreement,
including both the Annual Sponsored Research Plan to be carried out by OSI and
the specific Projects, timetables and technical goals to be pursued by HOECHST
and OSI.

                 1.4   "Annual Sponsored Research Plan" means the written plan
describing the research concerning the Target Proteins to be carried out during
each Commitment Year by OSI pursuant to this Agreement, including the specific
Projects, timetables and technical goals to be pursued by OSI.

                 1.5   "Base Program" means the Research Program as described in
the Annual Research Plan.

                                       -2-
<PAGE>   4
                  1.6 "HOECHST Confidential Information" means all information
about any element of HOECHST Technology which is disclosed by HOECHST to OSI and
designated "Confidential" in writing by HOECHST at the time of disclosure to OSI
to the extent that such information as of the date of disclosure to OSI is not
(i) known to OSI other than by virtue of a prior confidential disclosure to OSI
by HOECHST, (ii) disclosed in the published literature, or otherwise generally
known to the public, or (iii) obtained from a third party free from any
obligation of secrecy; provided, however, that such third party has no
obligation of confidentiality to OSI.

                  1.7 "OSI Confidential Information" means all information about
any element of OSI Technology which is disclosed by OSI to HOECHST and
designated "Confidential" in writing by OSI at the time of disclosure to HOECHST
to the extent that such information as of the date of disclosure to HOECHST is
not (i) known to HOECHST other than by virtue of a prior confidential disclosure
to HOECHST by OSI, (ii) disclosed in the published literature, or otherwise
generally known to the public, or (iii) obtained from a third party free from
any obligation of secrecy; provided, however, that such third party has no
obligation or confidentiality to HOECHST.

                  1.8 "Commitment Year" means a twelve-month period terminating
on each anniversary of the Effective Date.

                  1.9 "Contract Period" means the period beginning on the
Effective Date and ending on the date on which this Agreement terminates.

                  1.10 "Effective Date" is January 4, 1993.

                  1.11 "Event of Termination" has the meaning set forth in
Section 8.3.

                                       -3-
<PAGE>   5
                  1.12 "Funding Payments" has the meaning set forth in Section
3.

                  1.13 "Human Therapeutic Product" means any product for the
treatment or management of any disease state in a human patient or any other
human therapeutic indication derived from the Research Program in the course of
research concerning a Target Protein.

                  1.14 "Diagnostic Product" means any product useful for the
identification or quantification of the propensity toward or actual existence of
any disease state in a human patient or any other human diagnostic utility
identified in the course of the Research Program.

                  1.15 "Licensed Human Therapeutic Product" means a Human
Therapeutic Product that employs OSI Patent Rights, HOECHST Patent Rights, OSI
Technology or HOECHST Technology in its manufacture, use or sale.

                  1.16 "HOECHST Patent Rights" shall mean all applications for
letters patent, whether domestic or foreign, which are encompassed within
HOECHST Technology, including all continuations, continuations-in-part,
divisions, renewals and patents and additions thereof, all letters patent
granted thereon, and all reissues and extensions thereof.

                  1.17 "OSI Patent Rights" shall mean all applications for
letters patent, whether domestic or foreign, which are encompassed within OSI
Technology, including all continuations, continuations-in-part, divisions,
renewals and patents and additions thereof, all letters patent granted thereon,
and all reissues and extensions thereof.

                  1.18 "Person" means any individual, estate, trust,
partnership, joint venture, association, firm, corporation, company, or other
entity.

                                       -4-
<PAGE>   6
                  1.19 "Project" means each of those projects set forth in the
table of contents of an Annual Research Plan adopted pursuant to this Agreement.

                  1.20 "Target Protein(s)" means each of those proteins
identified as a drug development target in the Annual Sponsored Research Plan
towards which research projects will be conducted to identify lead compounds
from which transcription based drugs may be developed or derived, including all
therapeutic indications identified in the course of such research projects.

                  1.21 "Technology" means and includes all technology and
technical information that pertains to the development of Human Therapeutic
Products and Diagnostic Products derived from the Research Program.

                  1.22 "HOECHST Technology" means Technology developed through
the use of OSI Technology that pertains to a Target Protein and relates to
specific chemical compounds or drugs or the therapeutic use(s) of such compounds
or drugs, that is or was:

                       (a) developed by employees of, or consultants to, HOECHST
alone or jointly with third parties including OSI; or

                       (b) acquired by purchase, license, assignment or other
means from third parties by HOECHST.

                  1.23 "OSI Technology" means all Technology that pertains to a
Target Protein and relates to transcriptional modulation of gene expression of
the gene encoding the Target Protein, including all improvements thereto and the
use of such Technology to develop transcription-based drugs, that is or was:

                                       -5-
<PAGE>   7
                       (c) developed by employees of, or consultants to, OSI
alone or jointly with third parties including HOECHST; or

                       (d) acquired by purchase, license, assignment or other
means from third parties by OSI. OSI Technology shall include all such
Technology other than HOECHST Technology.

                  1.24 "Research Committee" has the meaning specified in Section
2.2.

                  1.25 "Research Program" is the collaborative research program
concerning the Target Proteins conducted by HOECHST and OSI.

                  1.26 "Sponsored Research Program" is that part of the Research
Program that is to be carried out by OSI.

                  1.27 "Valid Claim" means a claim within OSI Patent Rights or
HOECHST Patent Rights so long as such claim shall not have been disclaimed by
HOECHST or OSI, whichever is appropriate, or shall not have been held invalid in
a final decision rendered by a tribunal of competent jurisdiction from which no
appeal has been or can be taken.

                  1.28 "OSI Human Therapeutic Product" means any product for the
treatment or management of any disease state in a human patient developed as a
proprietary drug by OSI and derived from a HOECHST compound, in accordance with
Section 2.3.2(b).

         2.       Collaborative Research Program

                  2.1.1 Purpose. OSI and HOECHST shall conduct a collaborative
Research Program concerning the Target Proteins throughout the Contract Period.
The objectives of the Research Program are to discover Human Therapeutic
Products.

                                       -6-
<PAGE>   8
                  2.1.2 Annual Research Plan. The Annual Research Plan for the
first Commitment Year is described in Appendix I hereto. For each Commitment
Year after the first Commitment Year, the Annual Research Plan shall be prepared
by the Research Committee for submission to, and approval by, HOECHST and OSI no
later than ninety (90) days before the end of the prior Commitment Year. If
HOECHST and OSI cannot agree on the Annual Research Plan or Annual Sponsored
Research Plan, OSI shall determine its content. The Annual Research Plan and the
Annual Sponsored Research Plan for each Commitment Year shall be appended to and
made part of this Agreement.

                  2.1.3 Exclusivity.

                  (a)   OSI agrees that during the Contract Period neither OSI
nor any of its Affiliates shall conduct research itself or sponsor any other
research, or engage in any research sponsored by any Person not a party to this
Agreement, if the objectives of such research are the discovery and development
of novel Human Therapeutic Products against the Target Proteins unless agreed to
by the Research Committee. If OSI becomes aware during the Contract Period of an
opportunity to sponsor other research having any of the objectives of the
Research Program or to engage in such research sponsored by a Person that is not
a party to this Agreement, it shall promptly notify HOECHST of such opportunity.
HOECHST and OSI shall then negotiate in good faith for a period of one hundred
twenty (120) days an agreement by which such opportunity can be incorporated
into the Research Program or otherwise used to further the purposes of the
Research Program to their mutual advantage. If at the end of the one hundred
twenty (120) day period, the parties have not reached

                                       -7-
<PAGE>   9
agreement, OSI shall be free to pursue such opportunity with a third party
without further obligation to HOECHST.

                  (b)   HOECHST agrees that during the Contract Period neither
HOECHST nor any of its Affiliates shall sponsor any other research, or engage in
any research sponsored by any Person not a Party to this Agreement using the
gene transcription methods described in the Research Plan, if the objectives of
such research are the discovery of novel Human Therapeutic Products; provided,
however, that, if HOECHST becomes aware during the Contract Period of an
opportunity to sponsor other research having any of the objectives of the
Research Program or to engage in such research sponsored by a Person that is not
a party to this Agreement, it shall promptly notify OSI of such opportunity.
HOECHST and OSI shall then negotiate in good faith for period of one hundred
twenty (120) days an agreement by which such opportunity can be incorporated
into the Research Program or otherwise used to further the purposes of the
Research Program to their mutual advantage. If at the end of the one hundred
twenty (120) day period, the parties have not reached agreement, HOECHST shall
be free to pursue such opportunity with a third party without further obligation
to OSI.

                  2.2   Research Committee

                  2.2.1 Purpose. A research committee shall be established (the
"Research Committee") by HOECHST and OSI for the following purposes:

                  (a)   to review and evaluate progress under each Annual
Research Plan;

                  (b)   to prepare the Annual Research Plan for each Commitment
Year; and

                                       -8-
<PAGE>   10
                  (c)   to coordinate and monitor publication of research
results obtained from the exchange of information and materials that relate to
the Research Program.

                  (d)   to make priority and program decisions.

                  2.2.2 Membership. HOECHST and OSI each shall appoint, in its
sole discretion, four members to the Research Committee. Substitutes may be
appointed at any time.

                  The initial members shall be:

                  OSI Appointees:    ***
                                     ***
                                     ***


                 HOECHST Appointees: ***
                                     ***


                  2.2.3 Chair. The Research Committee shall be chaired by two
co-chairpersons, one appointed by HOECHST and the other appointed by OSI.

                  2.2.4 Meetings. The Research Committee shall meet at least
three times a year, at places and on dates selected by each party in turn. Other
representatives of HOECHST or OSI or both, in addition to the members of the
Research Committee, may attend such meetings at the invitation of both parties.


*** These portions deleted pursuant to a request for confidential treatment.


                                       -9-
<PAGE>   11
                  2.2.5 Minutes. The Research Committee shall keep accurate
minutes of its deliberations which record all proposed decisions and all actions
recommended or taken. The minutes shall be delivered to all Research Committee
members within five working days after each meeting. The party hosting the
meeting shall be responsible for the preparation of the minutes. Draft minutes
shall be edited by the co-chairpersons and shall be issued in final form only
with their approval and agreement.

                  2.2.6 Decisions. Subject to the provisions of 2.1.2, all
technical decisions of the Research Committee shall be made by a majority of its
members.

                  2.2.7 Expenses. HOECHST and OSI shall each bear all expenses
of their respective members related to their participation on the Research
Committee.

                  2.3   Reports and Materials

                  2.3.1 Reports. During the Contract Period, HOECHST and OSI
each shall furnish to the Research Committee:

                        (a) summary reports within fifteen (15) days after the
end of each three-month period, commencing on the Effective Date, describing its
progress under the Annual Research Plan; and

                        (b) comprehensive written reports within thirty (30)
days after the end of each Commitment Year, describing in detail the work
accomplished by it under the Annual Research Plan during the Commitment Year and
discussing and evaluating the results of such work.

                                      -10-
<PAGE>   12
                  2.3.2 Materials.

                        (a) OSI and HOECHST shall, during the Contract Period as
a matter of course as described in the Annual Research Plan or upon each other's
oral or written request, furnish to each other samples of biochemical,
biological or synthetic chemical materials which are part of either OSI or
HOECHST Technology and which are necessary for each party to carry out its
responsibilities under the Annual Research Plan. To the extent that the
quantities of materials requested by either party exceed the quantities set
forth in the Annual Research Plan, the requesting party shall reimburse the
other party for the reasonable costs of such materials if they are furnished.

                        (b) HOECHST agrees that OSI may test the compounds
furnished by HOECHST for screening in the Research Program against OSI's
proprietary drug assays, provided that OSI identifies such proprietary assays to
HOECHST and HOECHST gives its consent in writing which consent shall not
unreasonably be withheld, and OSI agrees to pay royalties or extend other rights
to HOECHST as hereinafter provided.

                        (c) OSI shall not analyze the test compounds provided by
HOECHST with respect to composition or structure without prior written consent
of HOECHST.

                  2.4   Laboratory Facilities and Personnel. OSI shall provide
suitable laboratory facilities, equipment and personnel for the work to be done
by OSI in carrying out the Annual Sponsored Research Plan.

                  2.5   Diligent Efforts. HOECHST and OSI each shall use
reasonably diligent efforts to achieve the objectives of the Research Program.
OSI will use reasonably diligent

                                      -11-
<PAGE>   13
efforts to achieve the objectives listed in the Annual Research Plan (Appendix
I) and HOECHST will use reasonably diligent efforts to assist OSI in the pursuit
of those objectives. To achieve the objectives of the Research Program, HOECHST
will specifically use diligent efforts:

                        (a) to advance the pharmacological assessment of
compounds identified by OSI or HOECHST in order to select those worthy of
further investigation;

                        (b) to determine the chemical structure of the selected
compounds and to make related compounds to determine the relationship between
structure and activity and to identify potential development candidates;

                        (c) to select development candidates; and

                        (d) to develop manufacturing methods and pharmaceutical
formulations for those selected candidates.

         Furthermore, HOECHST will try to assess safety and efficacy of the 
selected development candidates in animals and in human patients under 
conditions designed to yield data suitable for inclusion in approval 
applications to be submitted to the U.S. Food and Drug Administration and 
other appropriate authorities.

         3.      Funding of the Sponsored Research Program.

                  3.1   Base Funding Payments. The funding obligations of OSI
and HOECHST for each Commitment Year (the "Base Funding Payments") shall be as
follows:

                        (a) OSI agrees to pay for the fully-weighted costs of
the Base Program tasks assigned to it, which are expected to cost a total of
*** over the ***


***These portions deleted pursuant to a request for confidential treatment.

                                      -12-
<PAGE>   14
*** of the program, plus any supplementary program or additional costs
which may be mutually agreed upon by HOECHST and OSI, including the extra costs
of screening more than *** assumed in the Base Program, in
accordance with Section 3.2 below. Additional HOECHST compounds will be screened
by OSI at a cost of ***.

                        (b) HOECHST agrees to make Base Funding Payments to
reimburse OSI for the Base Program in accordance with the following commitment
schedule (the "Funding Schedule"):

<TABLE>
<CAPTION>
                                                               HOECHST           TOTAL HOECHST
                        OSI              HOECHST R&D         REIMBURSEMENT          PAYMENT
($millions)         CONTRIBUTION           SUPPORT              TO OSI               TO OSI
- -----------         ------------           -------              ------               ------
<S>                   <C>                  <C>                <C>                  <C>
Year 1                    ***                 ***                 ***                  ***
                                                                                
Year 2                    ***                 ***                 ***                  ***
                                                                                
Year 3                    ***             $   ***            $    ***             $    ***
                                                                                
Year 4                    ***                 ***                 ***                  ***
                                                                                
Year 5                    ***                 ***                 ***                  ***
                                                                                
Year 6                    ***                 ***                 ***                  ***
                      -------              ------             --------             ---------
Total                 $   ***              $  ***             $   ***              $   ***
</TABLE>
                                                                        
- ------------------------------

*  includes cost of screening ***

                  3.2   Supplementary Funding Payments. In addition to the Base
Funding Payments, HOECHST agrees to reimburse OSI for any supplementary program
or other additional amounts which may be mutually agreed upon in advance as
follows ("Supplementary Funding Payments"):


***These portions deleted pursuant to a request for confidential treatment.

                                      -13-
<PAGE>   15
                  (a) HOECHST agrees to reimburse OSI for the fully-weighted
costs of screening compounds provided by HOECHST in excess of *** compounds;
and

                  (b) HOECHST agrees to reimburse OSI for the cost of work
performed on any additional Target Proteins or cell-lines (all of which must be
approved by OSI and HOECHST in advance) or other additional tasks as
contemplated by this Agreement or which may be recommended by the Research
Committee.

         3.3      Timing of Payments.

                  3.3.1 Timing: Base Payments. All Base Funding Payments by
HOECHST for the Base Program shall be made in accordance with the Funding
Schedule shown in Section 3.1(b) at the beginning of the year set forth.

                  3.3.2 Timing: Supplementary Payments.

                        (a) All Supplementary Funding Payments by HOECHST for
supplementary programs or approved additional costs shall be made quarterly in
advance for work scheduled to be performed by OSI during the upcoming three (3)
month period, against OSI's invoice for such three (3) month period. Adjustments
as necessary to reflect the work actually performed by OSI shall be made at the
end of each three (3) month period and shall be reflected in OSI's invoice for
the next three (3) month period.

                        (b) The amount of any Supplementary Funding Payment for
each quarter shall be based on the work in progress pursuant to any applicable
supplementary research agreement and the annual budget associated therewith.

                        (c) Each Supplementary Funding Payment shall be paid on
the first day of the quarter or thirty (30) days after receipt of invoice,
whichever is later.

*** These portions deleted pursuant to a request for confidential treatment.

                                      -14-
<PAGE>   16
                  3.4   Books and Records. OSI shall keep for three (3) years
from the expiration of this Agreement complete and accurate records of its
expenditures of Funding Payments received by it. The records shall conform to
good accounting principles as applied to a similar company similarly situated.
HOECHST shall have the right at its own expense during the term of this
Agreement and during the subsequent three-year period to appoint an independent
certified public accountant reasonably acceptable to OSI to inspect said records
to verify the accuracy of such expenditures, pursuant to each Annual Sponsored
Research Plan. OSI shall make its records available for inspection by the
independent certified public accountant during regular business hours at the
place or places where such records are customarily kept, upon reasonable notice
from HOECHST to the extent reasonably necessary to verify the accuracy of the
expenditures and required reports. This right of inspection shall not be
exercised more than once in any calendar year and not more than once with
respect to records covering any specific period of time. HOECHST agrees to hold
in strict confidence all information concerning such expenditures, other than
their total amounts, and all information learned in the course of any audit or
inspection, except to the extent that it is necessary for HOECHST to reveal the
information in order to enforce any rights it may have pursuant to this
Agreement or if disclosure is required by law. The failure of HOECHST to request
verification of any expenditures before or during the three-year period shall be
considered acceptance of the accuracy of such expenditures, and OSI shall have
no obligation to maintain any records pertaining to such report or statement
beyond the three-year period.

                                      -15-
<PAGE>   17
         4.       Treatment of Confidential Information.

                  4.1.1 Confidentiality. HOECHST and OSI recognize that the OSI
and HOECHST Confidential Information constitutes highly valuable, proprietary,
confidential information. Subject to the terms and conditions of the Secrecy
Agreement dated June 28, 1991, the Supplementary Secrecy Agreement dated May 19,
1992, the disclosure obligations set forth in Section 4.3 and 4.4 hereof and the
publication rights set forth in Section 4.2 hereof, HOECHST and OSI each agree
that during the term of this Agreement and for five (5) years thereafter, they
will keep confidential, and will cause their Affiliates to keep confidential,
all Confidential Information that is disclosed to them or to any of their
Affiliates pursuant to this Agreement. Neither HOECHST nor OSI nor any of their
Affiliates shall use such Confidential Information except as expressly permitted
in this Agreement.

                  4.1.2 Disclosure of Confidential Information. HOECHST and OSI
acknowledge that the HOECHST and OSI Confidential Information is highly
valuable, proprietary, confidential information, and agree that any disclosure
of Confidential Information to any officer, employee or agent of the other or of
any of its Affiliates shall be made only if and to the extent necessary to carry
out its responsibilities under this Agreement and shall be limited to the
maximum extent possible consistent with such responsibilities. They agree not to
disclose the other's Confidential Information to any third parties under any
circumstance without written permission. Both parties shall take such action,
and shall cause its Affiliates to take such action, to preserve the
confidentiality of each other's Confidential Information as they would
customarily take to preserve the confidentiality of their own Confidential
Information. Each party, upon the other's request, will return all the

                                      -16-
<PAGE>   18
Confidential Information disclosed pursuant to this Agreement including all
copies, and extracts, of documents within 60 days of the request after the
termination of this Agreement.

                  4.1.3 Employees and Consultants. OSI represents that all of
its employees participating in the Research Program who shall have access to
HOECHST Technology and HOECHST Confidential Information are bound by agreement
to maintain such information in confidence. Consultants will be similarly bound.

                  4.2   Publication. Section 4.1 to the contrary
notwithstanding, the results obtained in the course of the Research Program may
be submitted for publication following scientific review by the Research
Comittee and subsequent approval by the management of OSI and HOECHST,
respectively. After receipt of the proposed publication by both HOECHST's and
OSI's managements, written approval or disapproval shall be provided within 30
days for a manuscript, an abstract for presentation at, or inclusion in the
proceedings of, a scientific meeting, or a transcript of an oral presentation to
be given at a scientific meeting.

                  4.3  Publicity. Except as required by law, neither party may
disclose the existence of this Agreement or the research described in it without
the written consent of the other party, which consent shall not be unreasonably
withheld.

                  4.4  Disclosure of Inventions. Each party hereto shall
promptly inform the other about all inventions concerning the Target Proteins
that are conceived, made or developed in the course of carrying out the Research
Program by employees of, or consultants to, either of them, whether such
inventions were conceived, made or developed solely or jointly with employees
of, or consultants to, the other. This Agreement shall not be

                                      -17-
<PAGE>   19
construed to obligate either party to disclose to the other any invention which
does not concern the Target Proteins.

                  4.5   Restrictions on Transferring Materials. HOECHST and OSI
recognize that the biological and biochemical materials which are part of OSI
Technology and HOECHST Technology represent valuable commercial assets.
Therefore, throughout the Contract Period and for five (5) years thereafter, OSI
and HOECHST each agree not to transfer to any third party any such compound or
material which constitutes Technology owned solely by the other party unless
agreed to by the Research Committee. Additionally, throughout the Contract
Period and for six (6) months thereafter, OSI and HOECHST each agree not to
transfer to any third party any such compound or material which constitutes
Technology owned solely by it, unless prior consent for any such transfer is
obtained from the other, which consent shall not be unreasonably withheld, and
unless such third party agrees as a condition of any such transfer not to
transfer the material further.

         5.       Intellectual Property Rights.

                  5.1   Ownership. All OSI Technology and OSI Patent Rights
shall be owned solely by OSI regardless of whether such OSI Technology or OSI
Patent Rights are developed, conceived, discovered, or invented by employees of,
or consultants to, OSI solely or jointly with employees of, or consultants to,
HOECHST. All HOECHST Technology and HOECHST Patent Rights shall be owned solely
by HOECHST regardless of whether such HOECHST Technology or HOECHST Patent
Rights are developed, conceived, discovered, or invented by employees of, or
consultants to, HOECHST solely or jointly with employees of, or consultants to,
OSI.

                                      -18-
<PAGE>   20
                  5.2   Filing, Prosecution and Maintenance of Patent Rights.
Subject to Sections 5.3, 5.4 and 5.5 below, OSI shall have the exclusive right,
at its expense and in its sole discretion to file, prosecute, defend, enforce,
and maintain OSI Patent Rights. HOECHST shall have the exclusive right, at its
expense and in its sole discretion to file, prosecute, defend, enforce and
maintain HOECHST Patent Rights.

                  5.3   Filing, Prosection and Maintenance of Patents Resulting
from the Research Program. OSI and HOECHST will discuss and decide jointly,
which party will have the right and obligation to file patent applications on
behalf of OSI or HOECHST, as applicable, on any patentable invention developed
by either OSI or HOECHST during the Contract Period relating to the Target
Proteins. Both parties will consult with each other regarding countries in which
such patent applications should be filed. The filing party will file patent
applications in those countries where the other party requests to file patent
applications. The filing party will have to prosecute all patent applications
relating to Contract Period Inventions and to respond to oppositions filed by
third parties. The filing party will have to maintain in force any letters
patent relating to Contract Period Inventions. The filing party will notify the
other party in a timely manner of any decision to abandon a pending patent
application relating to a Contract Period Invention or an issued patent relating
to a Contract Period Invention. Thereafter the other party shall have the
option, at its expense, of continuing to prosecute any such pending patent
application or of keeping the issued patent in force.

                  5.4   Status Reports. The filing party shall provide to the
other party copies of all patent applications relating to Contract Period
Inventions immediately after filing. The

                                      -19-
<PAGE>   21
filing party shall also provide to the other party copies of important documents
relating to prosecution of all such patent applications in a timely manner.

                  5.5   Reimbursement of Costs for Filing, Prosecuting and
Maintaining Certain Patents. The filing party will be reimbursed for the costs
of filing, prosecuting and maintaining all patent applications and all patents
which relate to Contract Period Inventions in countries where the other party
requests that such patent applications be filed, prosecuted and maintained, upon
receipt of invoices from the filing party. Such reimbursement shall be in
addition to Funding Payments and Supplementary Funding Payments pursuant to
Section 3 hereof. However, the other party may, upon 90 days advance written
notice, discontinue reimbursing the filing party for the cost of filing,
prosecuting or maintaining any patent application or any patent in any country.
The filing party shall pay all costs in those countries in which the other party
does not request that the filing party file, prosecute or maintain patent
applications and patents which relate to Contract Period Inventions, but in
which the filing party, at its option, elects to do so.

         6.       Other Rights of the Parties. During the Contract Period, OSI
and HOECHST shall promptly notify each other in writing of any and all
opportunities to acquire in any manner from third parties, technology or patents
which may be useful in, or may relate to, the Research Program. OSI and HOECHST
shall decide if such rights should be acquired and, if so, whether by OSI or
HOECHST. If acquired, such rights shall become OSI Technology or HOECHST
Technology, as appropriate.

         7.       Option for License. Upon request of either party to this
Agreement, OSI and HOECHST will enter into negotiations with respect to a
license agreement pursuant to which

                                      -20-
<PAGE>   22
HOECHST would acquire an exclusive, worldwide license, including the right to
grant sublicenses, to make, use and sell Licensed Human Therapeutic Products,
and OSI would acquire the exclusive, worldwide, perpetual license, including the
right to grant sublicenses, to make, use and sell Diagnostic Products, products
sold exclusively for research purposes and OSI Human Therapeutic Products
(derived from HOECHST compounds) under all HOECHST'S right, title and interest
in HOECHST Technology. The option hereinabove provided for will commence with
the Effective Date and expire four (4) years after the end of the Contract
Period unless such option is earlier terminated pursuant to Section 8.4.2 of
this Agreement. Such license agreement shall among other things provide for:

         a) payments by HOECHST to OSI of a royalty of *** of Net Sales (as
defined therein) for each Human Therapeutic Product employing OSI Patent Rights
or HOECHST Patent Rights and *** on Net Sales for each Human Therapeutic Product
employing only OSI Technology, or HOECHST Technology;

         b) payments by OSI of *** on Net Sales for any Diagnostic Product using
OSI Patent Rights, OSI Technology, HOECHST Patent Rights or HOECHST Technology;

         c) OSI shall pay a royalty of *** on Net Sales for any OSI Human
Therapeutic Product derived from a HOECHST compound if OSI decides to market the
OSI Human Therapeutic Product itself. If OSI decides not to market the OSI Human
Therapeutic Product itself, it shall give HOECHST the first right to negotiate
for marketing rights;

         d) if Patent Rights are involved, payments of the applicable royalty
will be made until the last valid patent claim expires;

*** These portions deleted pursuant to a request for confidential treatment.

                                      -21-
<PAGE>   23
         e) if Technology is involved and there are no valid patent claims,
payments of the applicable royalty will be made with respect to sales in a
Designated Country (as hereinafter defined) until ten (10) years after the first
commercial sale is made in such Designated Country. The Designated Countries are
USA, Canada, Germany, United Kingdom, France, Spain, Italy and Japan; and

         (f) such other customary and other terms as are negotiated between the
parties.

         8.  Term, Extension, Termination and Disengagement.

             8.1 Term. Unless sooner terminated or extended, this Agreement
shall expire six years after the Effective Date.

             8.2 Extension. HOECHST, at least six months prior to the end of the
term, shall notify OSI in writing if it desires to extend the Sponsored Research
Program. If OSI is willing to extend the Sponsored Research Program, OSI must so
notify HOECHST within three (3) months after receipt of HOECHST's notice.
HOECHST and OSI shall thereafter promptly negotiate in good faith mutually
acceptable terms for any extension to this Agreement.

             8.3 Events of Termination. The following events shall constitute
events of termination ("Events of Termination"):

                 (a) Any representation or warranty by OSI or HOECHST, or any of
its officers, under or in connection with this Agreement shall prove to have
been incorrect in any material respect when made.

                 (b) OSI or HOECHST shall fail in any material respect to
perform or observe any term, covenant or understanding contained in this
Agreement or in any of the

                                      -22-
<PAGE>   24
other documents or instruments delivered pursuant to, or concurrently with, this
Agreement, and any such failure shall remain unremedied for 30 days after
written notice to the failing party.

                 (c) Either party shall be entitled to terminate this Agreement
by written notice to the other having immediate effect, if the other party is
acquired by or merged with or transfers all of its assets or an essential part
of such assets to, or if fifty percent or more of its voting stock is acquired
by, or otherwise comes under the control of, a person or an organization which
is a competitor of the terminating party, or if any such person or organization
obtains an option or preemption right to acquire fifty percent or more of the
voting stock or otherwise control of the other party, such party shall without
delay inform the party which is entitled to terminate, of such acquisition,
transfer, control, option or preemption right.

         8.4     Termination.

                 8.4.1 Upon the occurrence of any Event of Termination, the
party not responsible may, by notice to the other party, terminate this
Agreement.

                 8.4.2 If HOECHST terminates this Agreement pursuant to Section
8.4.1, the option of HOECHST to negotiate a license provided for in Section 7
shall continue according to such Section. If OSI terminates this Agreement
pursuant to Section 8.4.1, the option of HOECHST to negotiate a license provided
for in Section 7 shall also terminate.

                 8.4.3 Upon termination of this Agreement, HOECHST will
reimburse OSI for any additional work done, or pending, within a six month
period following such termination.

                                      -23-
<PAGE>   25
         9.      Representations and Warranties.  OSI and HOECHST each
respectively represents and warrants as follows:

                 9.1 It is a corporation duly organized, validly existing and in
good standing under the laws of the State of Delaware and Germany, respectively,
and, is qualified to do business and is in good standing as a foreign
corporation in each jurisdiction in which the conduct of its business or the
ownership of its properties requires such qualification and has all requisite
power and authority, corporate or otherwise, to conduct it's business as now
being conducted, to own, lease and operate its properties and to execute,
deliver and perform this Agreement.

                 9.2 The execution, delivery and performance by it of this
Agreement have been duly authorized by all necessary corporate action and do not
and will not (a) require any consent or approval of its stockholders, (b)
violate any provision of any law, rule, regulation, order, writ, judgment,
injunction, decree, determination or award presently in effect having
applicability to it or any provision of its charter or by-laws or (c) result in
a breach of or constitute a default under any material agreement, mortgage,
lease, license, permit or other instrument or obligation to which it is a party
or by which it or its properties may be bound or affected.

                 9.3 This Agreement is a legal, valid and binding obligation of
it, enforceable against it in accordance with its terms and conditions, except
as such enforceability may be limited by applicable bankruptcy, insolvency,
moratorium, reorganization or similar laws, from time to time in effect,
affecting creditor's rights generally.

                                      -24-
<PAGE>   26
                 9.4 It is not under any obligation to any person, contractual
or otherwise, that is conflicting or inconsistent in any respect with the terms
of this Agreement or that would impede the diligent and complete fulfillment of
its obligations.

                 9.5 It has good and marketable title to, or valid leases or
licenses for, all of its properties, rights and assets necessary for the
fulfillment of its responsibilities in the Research Program, subject to no claim
of any third party other than the relevant lessors or licensors.

         10.     Covenants of OSI.

                 10.1 Affirmative Covenants of OSI Other Than Reporting
Requirements. Throughout the Contract Period, OSI shall:

                 10.1.1 maintain and preserve its corporate existence, rights,
franchises and privileges in the jurisdiction of its incorporation, and qualify
and remain qualified as a foreign corporation in good standing in each
jurisdiction in which such qualification is from time to time necessary or
desirable in view of its business and operations or the ownership of its
properties.

                 10.1.2 comply in all material respects with the requirements of
all applicable laws, rules, regulations and orders of any government authority
to the extent necessary to conduct the Sponsored Research Program.

         11.     Dispute Resolution.

                 11.1 Any dispute which cannot be resolved by discussion between
the parties under this Agreement shall be resolved by binding arbitration in
accordance with the rules then obtaining of the American Arbitration
Association. The arbitrators shall have the power

                                      -25-
<PAGE>   27
to award specific performance or injunctive relief and reasonable attorney's
fees and expenses to any party in such arbitration, except that the arbitrators
shall not have the power to reform this Agreement. Such arbitration shall be
held in the main office of the American Arbitration Association in the City of
New York.

                 11.2 The arbitration award rendered shall be final and binding
upon the parties and judgement thereon may be entered in any court of competent
jurisdiction.

         12.     Notices. All notices shall be mailed via certified mail, return
receipt requested, or courier, addressed as follows, or to such other address as
may be designated from time to time:

         If to HOECHST:   at its address set forth at the beginning of this
Agreement

                          Attention:       Dr. Jessen
                                           HOECHST AG
                                           General Pharma Research
                                           Postfach 80 03 20, D-6230
                                           Frankfurt am Main 80, Germany

         If to OSI:       at its address set forth at the beginning of this
Agreement

                          Attention:       Chief Executive Officer

Notices shall be deemed given as of the date of receipt.

         13.     Governing Law. This Agreement shall be construed in accordance
with the laws of the State of New York.

         14.     Miscellaneous.

                 14.1 Binding Effect. This Agreement shall be binding upon and
inure to the benefit of the parties and their respective legal representatives,
successors and permitted assigns.

                                      -26-
<PAGE>   28
                 14.2 Headings. Paragraph headings are inserted for convenience
of reference only and do not form a part of this Agreement.

                 14.3 Counterparts. This Agreement may be executed
simultaneously in two or more counterparts, each of which shall be deemed an
original.

                 14.4 Amendment; Waiver; etc. This Agreement may be amended,
modified, superseded or cancelled, and any of the terms may be waived, only by a
written instrument executed by each party or, in the case of waiver, by the
party or parties waiving compliance. The delay or failure of any party at any
time or times to require performance of any provision shall in no manner affect
the rights at a later time to enforce the same.

                 14.5 No Third Party Beneficiaries. No Person not a party to
this Agreement, including any employee of any party to this Agreement, shall
have or acquire any rights by reason of this Agreement. Nothing contained in
this Agreement shall be deemed to constitute the parties partners with each
other or any Person.

                 14.6 Assignment and Successors. This Agreement may not be
assigned by either party, except that each party may assign this Agreement and
its rights and interests hereunder, in whole or in part, to any of its
Affiliates, any purchaser of all or substantially

                                      -27-
<PAGE>   29
all of its assets or to any successor corporation resulting from any merger or
consolidation with or into such corporation.

         IN WITNESS WHEREOF, the parties have caused this Agreement to be
executed by their duly authorized representatives.

HOECHST AKTIENGESELLSCHAFT                     ONCOGENE SCIENCE, INC.

By  /s/ DR. GERT CASPRITZ                      By  /s/ GARY E. FRASHIER
    -----------------------------                  ---------------------------
Title:  Manager                                Title:  President and
        Cooperation and Licensing                      Chief Executive Officer
 


By  /s/ JORGEN REDEN, PH.D.
    -----------------------------
Title:  Member of Management
        Board Pharma
        Head of Research

                                      -28-
<PAGE>   30
              THE RESEARCH PLAN INCORPORATING THE ANNUAL SPONSORED

                   RESEARCH PLAN FOR THE COLLABORATION BETWEEN

                       ONCOGENE SCIENCE INC AND HOECHST AG

                                   APPENDIX 1

                                                               Revised 12/11/92

<PAGE>   31
Executive Summary

         Oncogene Science has developed a proprietary drug discovery technology
designed to identify compounds which affect the transcription of specific target
genes. A review on the development of this technology at Oncogene and the
advantages of transcription as an approach to drug discovery can be found in
Supplement 1. The immediate goal of the proposed collaboration with Hoechst AG
is to exploit this technology ***. The primary screening system employs live, 
genetically engineered transcription-reporter cells and state-of-the-art
robotics which will enable screening of ***.

         Compounds of interest identified by the primary screen will be
evaluated in secondary screens ***. Thus, the later
stages of the drug development pathway and clinical trial strategies are not
discussed in this document.

         The collaboration between Hoechst AG and Oncogene Science can be
divided into three phases:

***

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*** These portions deleted pursuant to a request for confidential treatment.


                                      -1-
<PAGE>   32
***

***

         A team of *** plus a Program Manager will be assembled during the
initiation of the collaboration, and will be associated with the program for the
duration of the collaboration. During the screening phase additional manning ***
will be allocated from the core screening group at Oncogene.

                                       -2-
<PAGE>   33
MOLECULAR TARGETS

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                                       -7-
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                                       -9-
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                                      -10-
<PAGE>   41
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                                      -11-
<PAGE>   42
SUPPLEMENT 1

TRANSCRIPTION AND DRUG DISCOVERY

ONCOGENE SCIENCE'S GENE EXPRESSION TECHNOLOGY

Introduction

         Over the last five years Oncogene Science has carried out a major
research effort focused on gene transcription as a novel approach to drug
discovery. Extensive patents have been filed covering both the method of drug
discovery and the resulting drugs identified by this technology. The goal is to
identify small molecular weight compounds which specifically modulate the
expression of a target gene of interest, thereby either increasing or decreasing
the concentration of the corresponding protein product. The unique screening
system employs live genetically engineered cells and state-of-the-art robotics,
which enables up to 100,000 compounds to be screened in a single year against
multiple target genes simultaneously. This approach can be used to identify lead
compounds in almost every therapeutic area. Transcriptional modulation not only
provides a potential means to replace recombinant protein based drugs, but also
provides a novel approach to manipulate key therapeutic targets in the body.

Traditional Drug Discovery Approaches

         Until recently, a major focus of the pharmaceutical industry had
remained centered around improving either the efficacy or safety of existing
drugs, agents whose detailed mechanism of action was often unknown. The
chemistry effort to support this approach during this century has been prolific,
and more than 3 million unique chemical structures have now been cataloged.

         Within the last decade, however, molecular biologists have begun to
unravel the detailed molecular aspects of normal cellular physiology and the
abnormalities associated with various disease processes. To date, the
application of molecular biology to drug discovery has taken three basic
directions; (i) the discovery of protein factors which act directly as
pharmaceutical agents; (ii) the combination of X-ray crystallography and
computer modelling to design organic compounds based upon a detailed
understanding of protein structure; or (iii) the use of recombinant proteins in
in vitro assays, in order to screen several thousand natural
products extracts or synthetic organic compounds. Each of these approaches,
however, suffers from significant limitations.

         The development of protein-based pharmaceuticals is perhaps the best
known application of molecular biology to the drug industry. Major successes
have included growth hormone for the treatment of pituitary dwarfism, tissue
plasminogen activator to treat myocardial infarction, insulin for diabetes, and
erythropoietin and G-CSF for the treatment of anemia and neutropenia,
respectively. All of these agents, however, possess a number of major
limitations characteristic of protein-based therapeutants. These include the
route of administration, cost of manufacture,

                                      -12-
<PAGE>   43
formulation, stability and the relative complexity of patenting recombinant
biologicals. Furthermore, the use of proteins as drugs is restricted to diseases
or physiological states that can be influenced by serum borne factors. These
problems, as well as a number of other major limitations, also apply to
therapeutic approaches based upon the use of monoclonal antibodies.

         The second approach to drug discovery is contingent upon a detailed
knowledge of specific protein structure. Interactive computing theoretically
allows the design of small molecular weight compounds that are predicted to bind
to specific sites on the target protein. This approach requires that the three
dimensional structure of the target protein be known at very high resolution,
while modelling of the detailed interactions with compounds often necessitates
the use of modern supercomputers. An additional complication is that the
structure of the protein as determined by crystallography, may not reflect the
native conformation of the protein within the cell. As more protein structures
are solved, and as modelling programs become more powerful, rational drug design
may begin to make an important contribution to the drug discovery. To date,
however, there are no drugs on the market which have been developed de
novo using this technology.

         The third traditional method has involved the screening of several
thousand fermentation broths, natural product extracts or synthetic organic
compounds, for their ability to influence the function of a purified or
partially purified protein, typically a hormone receptor or an enzyme. In many
instances, however, it can prove to be technically difficult to isolate a
complex protein with retention of its activity. In addition, the critical
biochemical activity of many disease targets may be unknown, thereby preventing
the design of an appropriate screen. In other cases, the key target may be a
member of a gene family where the corresponding polypeptides are almost
identical, and an effective drug must be able to selectively target one specific
member. Another major limitation of in vitro screening is that following a
considerable effort to generate interesting compounds, many leads ultimately
fail to be developed due to metabolism, cytotoxicity or lack of cell
permeability. Finally, it is becoming increasingly apparent that many diseases,
such as atherosclerosis, cancer and many neurological disorders, are
multifactorial in origin, and may ultimately require the simultaneous modulation
of multiple targets to achieve an effective control.

         Oncogene Science believes that gene transcription provides a unique
approach to drug discovery, which has the potential to overcome many of the
limitations of conventional drugs and could lead to the development of novel
pharmaceuticals targeting most of the major therapeutic markets.

Gene Transcription As A Novel Target For Drug Discovery

         At Oncogene Science, a proprietary drug discovery approach has been
developed which is designed specifically to identify compounds which affect the
transcription of target genes. The screen utilizes genetically engineered live
cells lines. Thus, once a particular gene has been chosen as a target, the first
step of the process is to clone the regions of DNA which regulate expression of
that gene. These sequences are then fused to a highly sensitive reporter gene

                                      -13-
<PAGE>   44
which generates a readily measurable signal in response to changes in
transcription of the target gene. This genetically engineered DNA construct is
then introduced into an appropriate human cell type and stable lines isolated.
Such cell lines will then generate a signal which reflects a change in gene
expression when an appropriate compound is added to the tissue culture media.
Oncogene's approach is based upon a philosophy of very high-throughput drug
screening, ie., screening up to 100,000 compounds or fermentation broths against
each gene target in a single year. To achieve this, a proprietary screening
technology has been developed, which has been fully automated using
state-of-the-art robotics. Complete automation not only allows the primary
screen to be cost effective, but has proved essential to obtain highly
quantitative, reproducible data from high-throughput cell based screens.

        Each robotic system can analyze several thousand samples per week
against multiple target genes simultaneously. By using multiple targets in the
primary screen, efficacy, cytotoxicity, and initial specificity are rapidly
evaluated. For example, the presence of a chemical which activates transcription
of the human growth hormone gene would be readily detected by an increase in the
reporter signal only in the cell target which employed a growth hormone fusion
construct. This technology is not only highly quantitative but is of sufficient
sensitivity to allow the detection of fewer than twenty five molecules of the
reporter per cell. This provides both a number of major technical advantages
while enabling the screen to detect initial lead compounds with apparent limited
activity, eg. potent compounds present at low concentrations in fermentation
broths. Automated on-line data reduction and statistical analysis allows rapid
quantitative determination to identify the initial lead compounds. Compounds of
interest identified by the primary screen are then further evaluated in
secondary screens (eg. by quantitative PCR, protein based assays, etc.) for
their ability to regulate the native endogenous gene in a similar fashion. A
variety of appropriate tertiary assays and animal models can then be employed
for the final stages of lead development.

Modulating gene transcription using drugs

        Over the last few years it has become apparent that many of the body's
normal physiological pathways, as well as the response to disease states,
involve changes in gene transcription. For example, the amount of growth hormone
produced by the pituitary, or the levels of blood cell growth factors, such as
G-CSF and erythropoietin (Epo), are tightly controlled at the level of gene
transcription. The Epo gene is specifically activated in response to anoxia (low
oxygen). The growth hormone gene is transcriptionally activated by the binding
of a second hormone (termed GHRF) to a receptor on the plasma membrane. The goal
of Oncogene Science's transcription technology is to use small molecular weight
drugs to maximize such physiological responses to produce the desired
pharmacological endpoint.

        In addition to the physiological evidence which clearly demonstrates
highly specific regulation at the level of gene transcription, there are already
a number of genes which are known to be subject to pharmaceutical intervention
by small molecular weight compounds. Steroid hormone receptors are themselves
transcription factors. Nolvadex (Tamoxifen), for example, regulates the
expression of estrogen responsive genes to control breast cancer, while 


                                      -14-
<PAGE>   45
Eulexin (flutamide) demonstrates dramatic palliative efficacy in the treatment
of prostate cancer by blocking the action of the testosterone receptor.
Similarly, steroid receptors are the target of drugs used as anti-inflammatory
agents, contraceptives, etc.

        It has also become apparent that a number of drugs, whose mechanism was
previously unknown, act by specifically modulating the expression of various
target genes. One recent example of note is aspirin, which has been shown to
mediate its anti-inflammatory effects by inhibiting transcriptional activation
of prostaglandin synthesis by interleukin-1. Other examples include the
immunosuppressive agents cyclosporin A and FK506, which inhibit the
transcription of several genes involved in T cell activation, particularly
interleukin 2 (IL-2) and its receptor. Cyclosporin A and FK506, both bind to
proteins which regulate the activity of a transcription factor, which in turn
inhibits the expression of IL-2. Similarly, lovastatin indirectly up-regulates
the hepatic LDL receptor by lowering serum cholesterol. Such examples of
indirect regulatory effects stress the utility of a cell-based promoter-reporter
technology as a means to identify lead compounds with the potential to modulate
transcription at a variety of levels. Thus, compounds identified by the primary
screen do not have to bind directly to a transcription factor.

Advantages of targeting gene transcription

        -      Replacement of recombinant proteins as therapeutic agents, e.g.,
               replace erythropoietin or growth hormone with a small molecular
               weight pharmaceutical to increase the expression of the
               endogenous gene. This could potentially overcome the major
               limitations associated with the use of biologicals, eg. patents,
               costs of production, formulation, route of administration, etc.

        -      Transcriptional modulation can act to affect either intracellular
               or extracellular targets. In contrast, both recombinant
               biologicals and monoclonal antibodies require a target to be
               either present in the circulation or on the surface of cells.

        -      The ability to modulate the level of a protein which cannot be
               readily targeted by other means, e.g. intrinsic membrane proteins
               such as the glucose transport proteins in diabetes, or the
               macrophage scavenger receptor and the LDL receptor in the
               treatment of atherosclerosis.

        -      Most traditional drugs have acted as either receptor antagonists
               or enzyme inhibitors. Transcription-based pharmaceuticals allow
               the absolute concentration of a target protein to be either
               increased or decreased. This also represents a significant
               advantage compared to antisense based approaches. Antisense
               molecules are also inactive orally, expensive, and act only to
               decrease protein levels.

        -      The biochemical activity of the protein encoded by a target gene
               may be unknown, thereby preventing an effective in vitro
               screening approach to be implemented. This technology employs a
               cell-based transcription screen to target


                                      -15-
<PAGE>   46
               the gene and not its product, therefore a detailed knowledge of
               protein function is not essential. 

        -      Oncogene's primary screens are cell-based. This provides screens
               which are considerably more physiological than using purified in
               vitro assays, yet avoids the technical complexity and ethical
               issues associated with animal based screens. The cell-based
               approach also provides multiple target sites within the cell for
               pharmacological intervention. In addition, compounds which either
               fail to interact with the cell in a functional manner, or are
               highly cytotoxic, are readily excluded.

        -      Targeting the specific expression of a gene in a multigene
               family, rather than the corresponding polypeptide, provides a
               means to facilitate specific intervention. Modulating the
               activity of an entire family of structurally related proteins
               could be deleterious to the organism, while modulation of a
               specific member of a group of highly homologous proteins can be
               difficult to achieve pharmacologically. One example would be the
               specific transcriptional modulation of a CNS receptor where
               although the family of polypeptides may exhibit a high degree of
               homology, the regulatory regions (and the corresponding
               transcription factors of the gene families which bind to these
               regions) are typically distinct to allow cell type specific
               expression.

        -      The possibility of tissue specific regulation of a target gene.
               It is becoming increasingly apparent that the mechanisms regulate
               any one gene at the transcriptional level vary between different
               tissues. Thus, this approach has the potential to identify drugs
               which modulate the expression of a target gene in a
               tissue-specific manner. Again, this is not possible with
               antisense approaches.

        -      It is now well documented that coordinated changes in gene
               expression regulate a large number of metabolic processes in the
               body. Thus, it may be possible to use a single drug to regulate
               the transcription of small groups of genes simultaneously, rather
               than using a conventional pharmaceutical to simply target one
               specific enzyme or receptor. Given that many major diseases are
               multifactorial in origin, such as atherosclerosis, Alzheimers,
               and cancer, this approach may ultimately prove essential to
               develop truly effective drugs in these areas.

        -      Oncogene Science's technology is unique. Gene transcription has
               not been previously exploited. It is also apparent that very few
               pharmaceutical companies have had the technology in place to
               enable the screening over 100,000 compounds against a single
               target, ie. typically most previous drug screens have evaluated
               between 1,000-10,000 compounds. Thus, it can be anticipated that
               a high-throughput screening approach based upon gene
               transcription will result in the identification of novel drug
               structures.


                                      -16-
<PAGE>   47
        -      Over the last five years, Oncogene Science has established the
               leading position in the field of gene transcription as an
               approach to drug discovery. The original reason for focusing in
               this area was that in unraveling the normal function of oncogenes
               and anti-oncogenes, it had become apparent that the primary
               function of many such genes is to modulate gene transcription,
               either directly by binding to regulatory sequences on the DNA, or
               indirectly by controlling key steps in the signal transduction
               machinery.

        -      Oncogene Science has filed broad patent applications on
               transcription based approaches, including claims on the methods
               of discovery, the robotic technology, and the use of compounds
               which specifically modulate gene transcription.

ONCOGENE SCIENCE'S SCREENING TECHNOLOGY

        In order to facilitate the screening of large numbers of test samples,
Oncogene Science has invested extensively on the development of proprietary
robotics systems. In addition to carrying out cell-based transcription assays,
these systems are now able to run virtually any cell based or in-vitro screening
assays in a microplate format.

        The robotic systems handle every step in the assay procedure. This
includes on-line cell incubation facilities, liquid handling systems for
dilutions and additions of test samples, and an array of units for manipulations
in an assay loop. Two robotic arm assemblies are employed to shuttle microplates
and microplate trays through the assay cycles. The transcription assays
culminate with a read-out from a 96 well luminometer. Data are captured
automatically into a processing network which performs quality controls on each
individual microplate assay well and carries out a rapid data reduction and
analysis. Each of the robotic systems has a capacity in excess of 100,000 assays
per week. This translates to approximately 100,000 compounds per year, with
follow-up, against multiple target genes.

        Automation on this scale has proven to be essential for producing high
quality data from cell based screens, however it also provides a number of
additional advantages over other approaches to screening:

        (i)    Cost Effectiveness : Support for each robotic system requires
               only a three person team. This includes the manning for all
               tissue culture, robotic maintenance, robotic operation, data
               analysis, database searching and report preparation, as well as
               initial potency and cytotoxicity follow-up studies on
               high-throughput screen leads.

        (ii)   High-Throughput : Each system has a capacity for up to 125,000
               reporter assays per week. A practical, routine weekly throughput
               is approximately 75% of this capacity. These assays can be
               divided amongst replicate assays of individual samples, positive
               and negative controls, and multiple test cell lines, as is
               appropriate for a particular screening program. For example, in
               the first 12


                                      -17-
<PAGE>   48
               month period employing the original system, over 125,000
               compounds were screened against 3 cell lines with triplicate
               determinations on each compound, and multiple controls on each
               microplate assayed.

        (iii)  Accuracy : Automation has proven to be very effective in terms of
               removing protocol errors and in more accurately controlling and
               synchronizing procedures. This has resulted in running multiple
               cellbased screens with a typical coefficient of variation across
               each plate being less than 15%.

        The systems have been designed with flexibility as a key consideration.
Thus, by interchanging the measurement device in place of a luminometer and
conversion of these instruments to a robot compatible format, it is possible to
utilize multiple read-outs suitable for various assay formats. For example,
Oncogene Science has now also developed microplate readers for the determination
of UV absorbance, fluorescence, and radioactivity, enabling almost any assay
configuration to be employed. All the software for running the robots, the
liquid sampling processor, data capture, and data processing has been developed
at Oncogene Science and is readily converted to suit alternate assay needs. This
technology is currently employed in both transcriptional reporter assays and
cell-based immunoassays.

Preparation of Compounds and Samples for High-throughput Screening

        Oncogene Science has now incorporated into the robotic system the
capacity to operate in a mode which enables the rapid preparation of large
compound libraries (50-200,000 samples) in a 96-well format suitable for
screening. This approach also offers the possibility of archiving sets of master
compound plates for future screening needs. This procedure also makes maximum
use of the original compound allocation, with 1 mg of compound potentially
serving for 50-100 high-throughput screens against individual target assays.


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                                      -20-

<PAGE>   1
                                                                    EXHIBIT 10.4

- --------------------------------------------------------------------------------
Portions of this Exhibit 10.4 have been redacted and are the subject of a 
confidential treatment request filed with the Secretary of the Securities and 
Exchange Commission.
- --------------------------------------------------------------------------------
<PAGE>   2

                                                                    Exhibit 10.4

                        COLLABORATIVE RESEARCH AGREEMENT

        This COLLABORATIVE RESEARCH AGREEMENT is entered into as of October 1,
1993 by and between HOECHST-ROUSSEL PHARMACEUTICALS INC. ("HRPI"), a Delaware
corporation with the address of Route 202-206 Somerville, New Jersey 08876-1258
and ONCOGENE SCIENCE, INC. ("OSI"), a Delaware corporation having an office at
106 Charles Lindbergh Boulevard, Uniondale, New York 11553.

        WHEREAS, OSI was organized to develop, produce and market therapeutic
and diagnostic products for, among other things, the early detection, monitoring
and treatment of human disease; and

        WHEREAS, OSI is a party to an agreement dated as of January 7, 1993 with
HOECHST AKTIENGESELLSCHAFT, an Affiliate of HRPI ("HOECHST"), pursuant to which
HOECHST is providing similar services to OSI as those contemplated to be
provided by HRPI hereby; and

        WHEREAS, HRPI has the capability to undertake research for the discovery
and evaluation of agents for treatment of disease and also the capability for
clinical analysis, manufacturing and marketing of such agents; and

        WHEREAS, HRPI and OSI wish to pursue the research described in this
Agreement;

        NOW, THEREFORE, the parties agree as follows:

        1.     Definitions

               Whenever used in this Agreement, the terms defined in this
Section 1 shall have the meanings specified.

               1.1 "Affiliate" means any company, corporation or business
organization
<PAGE>   3
which the party in question directly or indirectly controls or any company,
corporation or business organization by which the party in question is directly
or indirectly controlled. For purposes of this Agreement, the term "control" and
"controlled" shall mean the holding of 50% or more of the voting stock or other
ownership rights of the company, corporation, or business organization involved.

               1.2 "Allocated Overhead" means the amount of overhead, including
general and administrative costs, determined in accordance with generally
accepted accounting principles, incurred by OSI and allocated to the Sponsored
Research Program in the same proportion that the total man-hours of work
performed in the Sponsored Research Program bears to the total man-hours of work
performed in all OSI research programs, or such other customary allocation basis
that may be agreed in writing between the parties.

               1.3 "Annual Research Plan" means the written plan describing the
annual research and budgets concerning the Target Proteins to be carried out
during each Commitment Year by HRPI and OSI pursuant to this Agreement,
including both the Annual Sponsored Research Plan to be carried out by OSI and
the specific Projects, timetables and technical goals to be pursued by HRPI and
OSI.

               1.4 "Annual Sponsored Research Plan" means the written plan
describing the research concerning the Target Proteins to be carried out during
each Commitment Year by OSI pursuant to this Agreement, including the specific
Projects, timetables and technical goals to be pursued by OSI.

               1.5 "Base Program" means the Research Program as described in the
Annual Research Plan.


                                      -2-
<PAGE>   4
               1.6 "HRPI Confidential Information" means all information about
any element of HRPI Technology which is disclosed by HRPI to OSI and designated
"Confidential" in writing by HRPI at the time of disclosure to OSI to the extent
that such information as of the date of disclosure to OSI is not (i) known to
OSI other than by virtue of a prior confidential disclosure to OSI by HRPI, (ii)
disclosed in the published literature, or otherwise generally known to the
public, or (iii) obtained from a third party free from any obligation of
secrecy; provided, however, that such third party has no obligation of
confidentiality to OSI.

               1.7 "OSI Confidential Information" means all information about
any element of OSI Technology which is disclosed by OSI to HRPI and designated
"Confidential" in writing by OSI at the time of disclosure to HRPI to the extent
that such information as of the date of disclosure to HRPI is not (i) known to
HRPI other than by virtue of a prior confidential disclosure to HRPI by OSI,
(ii) disclosed in the published literature, or otherwise generally known to the
public, or (iii) obtained from a third party free from any obligation of
secrecy; provided, however, that such third party has no obligation of
confidentiality to HRPI.

               1.8 "Commitment Year" means a twelve-month period terminating on
each anniversary of the Effective Date.

               1.9 "Contract Period" means the period beginning on the Effective
Date and ending on the date on which this Agreement terminates.

               1.10 "Effective Date" is October 1, 1993.

               1.11 "Event of Termination" has the meaning set forth in Section
8.3.


                                      -3-
<PAGE>   5
               1.12 "Funding Payments" has the meaning set forth in Section 3.

               1.13 "Human Therapeutic Product" means any product for the
treatment or management of any disease state in a human patient or any other
human therapeutic indication derived from the Research Program in the course of
research concerning a Target Protein.

               1.14 "Diagnostic Product" means any product useful for the
identification or quantification of the propensity toward or actual existence of
any disease state in a human patient or any other human diagnostic utility
identified in the course of the Research Program.

               1.15 "Licensed Human Therapeutic Product" means a Human
Therapeutic Product that employs OSI Patent Rights, HRPI Patent Rights, OSI
Technology or HRPI Technology in its manufacture, use or sale.

               1.16 "HRPI Patent Rights" shall mean all applications for letters
patent, whether domestic or foreign, which are encompassed within HRPI
Technology, including all continuations, continuations-in-part, divisions,
renewals and patents and additions thereof, all letters patent granted thereon,
and all reissues and extensions thereof.

               1.17 "OSI Patent Rights" shall mean all applications for letters
patent, whether domestic or foreign, which are encompassed within OSI
Technology, including all continuations, continuations-in-part, divisions,
renewals and patents and additions thereof, all letters patent granted thereon,
and all reissues and extensions thereof.

               1.18 "Person" means any individual, estate, trust, partnership,
joint venture, association, firm, corporation, company, or other entity.


                                      -4-
<PAGE>   6
               1.19 "Project" means each of those projects set forth in the
table of contents of an Annual Research Plan adopted pursuant to this Agreement.

               1.20 "Target Protein(s)" means each of those proteins identified
as a drug development target in the Annual Sponsored Research Plan towards which
research projects will be conducted to identify lead compounds from which
transcription based drugs may be developed or derived, including all therapeutic
indications identified in the course of such research projects.

               1.21 "Technology" means and includes all technology and technical
information that pertains to the development of Human Therapeutic Products and
Diagnostic Products derived from the Research Program.

               1.22 "HRPI Technology" means Technology developed through the use
of OSI Technology that pertains to a Target Protein and relates to specific
chemical compounds or drugs or the therapeutic use(s) of such compounds or
drugs, that is or was:

                    (a) developed by employees of, or consultants to, HRPI alone
or jointly with third parties including Affiliates and OSI, or

                    (b) acquired by purchase, license, assignment or other means
from third parties, including Affiliates, by HRPI.

               1.23 "OSI Technology" means all Technology that pertains to a
Target Protein and relates to transcriptional modulation of gene expression of
the gene encoding the Target Protein, including all improvements thereto and the
use of such Technology to develop transcription-based drugs, that is or was:

                    (a) developed by employees of, or consultants to, OSI alone
or 


                                      -5-
<PAGE>   7
jointly with third parties including HRPI; or

                    (b) acquired by purchase, license, assignment or other means
from third parties by OSI.

                    OSI Technology shall include all such Technology other than
HRPI Technology.

               1.24 "Research Committee" has the meaning specified in Section
2.2. 1.25 "Research Program" is the collaborative research program concerning
the Target Proteins conducted by HRPI and OSI.

               1.26 "Sponsored Research Program" is that part of the Research
Program that is to be carried out by OSI.

               1.27 "Valid Claim" means a claim within OSI Patent Rights or HRPI
Patent Rights so long as such claim shall not have been disclaimed by HRPI or
OSI, whichever is appropriate, or shall not have been held invalid in a final
decision rendered by a tribunal of competent jurisdiction from which no appeal
has been or can be taken.

               1.28 "OSI Human Therapeutic Product" means any product for the
treatment or management of any disease state in a human patient developed as a
proprietary drug by OSI and derived from a HRPI compound, in accordance with
Section 2.3.2(d).

               1.29 "Contract Period Inventions" has the meaning set forth in
Section 4.4.

        2.     Collaborative Research Program

               2.1.1 Purpose. OSI and HRPI shall conduct a collaborative
Research Program concerning the Target Proteins throughout the Contract Period.
The objectives of the Research Program are to discover Human Therapeutic
Products.


                                      -6-
<PAGE>   8
               2.1.2 Annual Research Plan. The Annual Research Plan for the
first Commitment Year is described in Appendix I hereto. For each Commitment
Year after the first Commitment Year, the Annual Research Plan shall be prepared
by the Research Committee for submission to, and approval by, HRPI and OSI no
later than ninety (90) days before the end of the prior Commitment Year. If HRPI
and OSI cannot agree on the Annual Research Plan or Annual Sponsored Research
Plan, OSI shall determine its content. The Annual Research Plan and the Annual
Sponsored Research Plan for each Commitment Year shall be appended to and made
part of this Agreement.

               2.1.3 Exclusivity.

                     (a) OSI agrees that during the Contract Period neither OSI
nor any of its Affiliates shall conduct research itself or sponsor any other
research, or engage in any research sponsored by any Person not a party to this
Agreement, if the objectives of such research are the discovery and development
of novel Human Therapeutic Products against the Target Proteins unless agreed to
by the Research Committee. If OSI becomes aware during the Contract Period of an
opportunity to sponsor other research having any of the objectives of the
Research Program or to engage in such research sponsored by a Person that is not
a party to this Agreement, it shall promptly notify HRPI of such opportunity.
HRPI and OSI shall then negotiate in good faith for a period of one hundred
twenty (120) days an agreement by which such opportunity can be incorporated
into the Research Program or otherwise used to further the purposes of the
Research Program to their mutual advantage. If at the end of the one hundred
twenty (120) day period, the parties have not reached agreement, OSI shall be
free to pursue such opportunity with a third party without further


                                      -7-
<PAGE>   9
obligation to HRPI.

                        (b) HRPI agrees that during the Contract Period neither
HRPI nor any of its Affiliates shall sponsor any other research, or engage in
any research sponsored by any Person not a Party to this Agreement using the
gene transcription method for the target protein (APP) or other proteins
described in the Research Plan, if the objectives of such research are the
discovery of novel Human Therapeutic Products; provided, however, that, if HRPI
becomes aware during the Contract Period of an opportunity to sponsor other
research having any of the objectives of the Research Program or to engage in
such research sponsored by a Person that is not a party to this Agreement, it
shall promptly notify OSI of such opportunity. HRPI and OSI shall then negotiate
in good faith for a period of one hundred twenty (120) days an agreement by
which such opportunity can be incorporated into the Research Program or
otherwise used to further the purposes of the Research Program to their mutual
advantage. If at the end of the one hundred twenty (120) day period, the parties
have not reached agreement, HRPI shall be free to pursue such opportunity with a
third party without further obligation to OSI.

              2.2 Research Committee

                  2.2.1 Purpose. A research committee shall be established (the
"Research Committee") by HRPI and OSI for the following purposes:

                        (a) to review and evaluate progress under each Annual
Research Plan;

                        (b) to prepare the Annual Research Plan for each
Commitment Year; and


                                      -8-
<PAGE>   10
                        (c) to coordinate and monitor publication of research
results obtained from the exchange of information and materials that relate to
the Research Program.

                        (d) to make priority and program decisions including
reasonable assessment of the Target Proteins in the light of the current state
of the art.

                  2.2.2 Membership. HRPI and OSI each shall appoint, in its sole
discretion, four members to the Research Committee. Substitutes may be appointed
at any time.

                  The initial members shall be:

         OSI Appointees:      ***
                              ***
                              ***
                              ***

         HRPI Appointees:     ***
                              ***
                              ***
                              ***

                  2.2.3 Chair. The Research Committee shall be chaired by two
co-chairpersons, one appointed by HRPI and the other appointed by OSI. 

                  2.2.4 Meetings. The Research Committee shall meet at least
twice a year, at places and on dates selected by each party in turn. Other
representatives of HRPI or OSI or both, in addition to the members of the
Research Committee, may attend such meetings at the invitation of both parties.
In addition, the parties shall confer at mutually

*** These portions deleted pursuant to a request for confidential treatment.

                                      -9-
<PAGE>   11
agreed times and places, or by telephone or video conferencing.

                  2.2.5 Minutes. The Research Committee shall keep accurate
minutes of its deliberations which record all proposed decisions and all actions
recommended or taken. The minutes shall be delivered to all Research Committee
members within five working days after each meeting. The party hosting the
meeting shall be responsible for the preparation of the minutes. Draft minutes
shall be edited by the co-chairpersons and shall be issued in final form only
with their approval and agreement.

                  2.2.6 Decisions. Subject to the provisions of 2.1.2, all
technical decisions of the Research Committee shall be made by a majority of its
members.

                  2.2.7 Expenses. HRPI and OSI shall each bear all expenses of
their respective members related to their participation on the Research
Committee. 

                  2.2.8 Participation with HOECHST-OSI Research Committee. The
Research Committee shall attempt to communicate and coordinate with the
HOECHST-OSI Research Committee created pursuant to the agreement dated January
7, 1993, between HOECHST and OSI, through the participation of the HRPI
Co-Chairperson (see Section 2.2.2) in the HOECHST-OSI Research Committee.

              2.3 Reports and Materials

                  2.3.1 Reports. During the Contract Period, HRPI and OSI each
shall furnish to the Research Committee:

                        (a) summary reports within fifteen (15) days after the
end of each three-month period, commencing on the Effective Date, describing its
progress under the Annual Research Plan; and


                                      -10-
<PAGE>   12
                        (b) comprehensive written reports within thirty (30)
days after the end of each Commitment Year, describing in detail the work
accomplished by it under the Annual Research Plan during the Commitment Year and
discussing and evaluating the results of such work.

                  2.3.2 Materials.

                        (a) OSI and HRPI shall, during the Contract Period as a
matter of course as described in the Annual Research Plan or upon each other's
oral or written request, furnish to each other samples of biochemical,
biological or synthetic chemical materials which are part of either OSI or HRPI
Technology and which are necessary for each party to carry out its
responsibilities under the Annual Research Plan. To the extent that the
quantities of materials requested by either party exceed the quantities set
forth in the Annual Research Plan, the requesting party shall reimburse the
other party for the reasonable costs of such materials if they are furnished.

                        (b) OSI agrees that it will also test HOECHST compounds
against Target Proteins as defined in the HRPI Research Plan and HOECHST has
given its consent to this according to the separate agreement between HOECHST
and HRPI (Attachment I).

                        (c) OSI agrees that it will also test HRPI compounds
against HOECHST's Target Proteins as defined in the HOECHST Research Plan, and
HRPI has given its consent to this according to the separate agreement between
HOECHST and HRPI (Attachment I).

                        (d) HRPI agrees that OSI may test the compounds
furnished 


                                      -11-
<PAGE>   13
by HRPI for screening in the Research Program against OSI's proprietary drug
assays, provided that OSI identifies such proprietary assays to HRPI and HRPI
gives its consent in writing which consent shall not unreasonably be withheld,
and OSI agrees to pay royalties or extend other rights to HRPI as hereinafter
provided.

                        (e) OSI shall not analyze the test compounds provided by
HRPI with respect to composition or structure without prior written consent of
HRPI. 

              2.4 Laboratory Facilities and Personnel. OSI shall provide
suitable laboratory facilities, equipment and personnel for the work to be done
by OSI in carrying out the Annual Sponsored Research Plan.

              2.5 Diligent Efforts. HRPI and OSI each shall use reasonably
diligent efforts to achieve the objectives of the Research Program. OSI will use
reasonably diligent efforts to achieve the objectives listed in the Annual
Research Plan (Appendix I) and HRPI will use reasonably diligent efforts to
assist OSI in the pursuit of those objectives. To achieve the objectives of the
Research Program, HRPI will specifically use diligent efforts:

                  (a) to advance the pharmacological assessment of compounds
identified by OSI or HRPI in order for HRPI to select those worthy of further
investigation;

                  (b) to determine the chemical structure of the selected
compounds and to make related compounds to determine the relationship between
structure and activity and to identify potential development candidates;

                  (c) to select development candidates; and

                  (d) to develop manufacturing methods and pharmaceutical
formulations for those selected candidates.


                                      -12-
<PAGE>   14
         Furthermore, HRPI will try to assess safety and efficacy of the
selected development candidates in animals and in human patients under
conditions designed to yield data suitable for inclusion in approval
applications to be submitted to the U.S. Food and Drug Administration and other
appropriate authorities.

         3. Funding of the Sponsored Research Program.

            3.1 Base Funding Payments. The funding obligations of OSI and HRPI
for each Commitment Year (the "Base Funding Payments") shall be as follows:

                (a) OSI agrees to pay for ***, in accordance with Section 3.2
below. Additional HRPI compounds will be screened by OSI at a cost of ***
compounds per Target Protein.

                (b) HRPI agrees to make Base Funding Payments to reimburse OSI
for the Base Program in accordance with the following commitment schedule (the
"Funding Schedule"):


***These portions deleted pursuant to a request for confidential treatment.

                                      -13-
<PAGE>   15
<TABLE>
<CAPTION>
                                                           HRPI         TOTAL HRPI
                    OSI              HRPI R&D          REIMBURSEMENT      PAYMENT
               CONTRIBUTION          SUPPORT              TO OSI          TO OSI
               ------------          -------              ------          ------
<S>            <C>                   <C>               <C>              <C>
***

</TABLE>

            3.2 Supplementary Funding Payments. In addition to the Base Funding
Payments, HRPI agrees to reimburse OSI for any supplementary program or other
additional amounts which may be mutually agreed upon in advance as follows
("Supplementary Funding Payments"):

                (a) HRPI agrees to reimburse OSI for the fully-weighted costs of
screening compounds provided by HRPI in excess of *** compounds; and 

                (b) HRPI agrees to reimburse OSI for the cost of work performed
on any additional Target Proteins or cell-lines (all of which must be approved
by OSI and HRPI in advance) or other additional tasks as contemplated by this
Agreement or which may be recommended by the Research Committee.

            3.3 Timing of Payments.

                3.3.1 Timing: Base Payments. All Base Funding Payments by HRPI
for the Base Program shall be made in accordance with the Funding Schedule shown
in Section 3.1(b) at the beginning of the year set forth.

***These portions deleted pursuant to a request for confidential treatment.


                                      -14-
<PAGE>   16
                3.3.2 Timing: Supplementary Payments.

                      (a) All Supplementary Funding Payments by HRPI for
supplementary programs or approved additional costs shall be made quarterly in
advance for work scheduled to be performed by OSI during the upcoming three (3)
month period, against OSI's invoice for such three (3) month period. Adjustments
as necessary to reflect the work actually performed by OSI shall be made at the
end of each three (3) month period and shall be reflected in OSI's invoice for
the next three (3) month period.

                      (b) The amount of any Supplementary Funding Payment for
each quarter shall be based on the work in progress pursuant to any applicable
supplementary research agreement and the annual budget associated therewith.

                      (c) Each Supplementary Funding Payment shall be paid on
the first day of the quarter or thirty (30) days after receipt of invoice,
whichever is later. 

            3.5 Books and Records. OSI shall keep for three (3) years from the
expiration of this Agreement complete and accurate records of its expenditures
of Funding Payments received by it. The records shall conform to good accounting
principles as applied to a similar company similarly situated. HRPI shall have
the right at its own expense during the term of this Agreement and during the
subsequent three-year period to appoint an independent certified public
accountant reasonably acceptable to OSI to inspect said records to verify the
accuracy of such expenditures, pursuant to each Annual Sponsored Research Plan.
OSI shall make its records available for inspection by the independent certified
public accountant during regular business hours at the place or places where
such records are customarily kept, upon reasonable notice from HRPI to the
extent reasonably necessary to


                                      -15-
<PAGE>   17
verify the accuracy of the expenditures and required reports. This right of
inspection shall not be exercised more than once in any calendar year and not
more than once with respect to records covering any specific period of time.
HRPI agrees to hold in strict confidence all information concerning such
expenditures, other than their total amounts, and all information learned in the
course of any audit or inspection, except to the extent that it is necessary for
HRPI to reveal the information in order to enforce any rights it may have
pursuant to this Agreement or if disclosure is required by law. The failure of
HRPI to request verification of any expenditures before or during the three-year
period shall be considered acceptance of the accuracy of such expenditures, and
OSI shall have no obligation to maintain any records pertaining to such report
or statement beyond the three-year period.

        4. Treatment of Confidential Information.

           4.1.1 Confidentiality. HRPI and OSI recognize that the OSI and HRPI
Confidential Information constitutes highly valuable, proprietary, confidential
information. Subject to the terms and conditions of the Secrecy Agreement dated
June 28, 1991, the disclosure obligations set forth in Section 4.3 and 4.4
hereof and the publication rights set forth in Section 4.2 hereof, HRPI and OSI
each agree that during the term of this Agreement and for five (5) years
thereafter, they will keep confidential, and will cause their Affiliates to keep
confidential, all Confidential Information that is disclosed to them or to any
of their Affiliates pursuant to this Agreement. Neither HRPI nor OSI nor any of
their Affiliates shall use such Confidential Information except as expressly
permitted in this Agreement.

           4.1.2 Disclosure of Confidential Information. HRPI and OSI
acknowledge that the HRPI and OSI Confidential Information is highly valuable,
proprietary, 


                                      -16-
<PAGE>   18
confidential information, and agree that any disclosure of Confidential
Information to any officer, employee or agent of the other or of any of its
Affiliates shall be made only if and to the extent necessary to carry out its
responsibilities under this Agreement and shall be limited to the maximum extent
possible consistent with such responsibilities. They agree not to disclose the
other's Confidential Information to any third parties under any circumstance
without written permission. Both parties shall take such action, and shall cause
its Affiliates to take such action, to preserve the confidentiality of each
other's Confidential Information as they would customarily take to preserve the
confidentiality of their own Confidential Information. Each party, upon the
other's request, will return all the Confidential Information disclosed pursuant
to this Agreement including all copies, and extracts, of documents within 60
days of the request after the termination of this Agreement.

           4.1.3 Employees and Consultants. OSI represents that all of its
employees participating in the Research Program who shall have access to HRPI
Technology and HRPI Confidential Information are bound by agreement to maintain
such information in confidence. Consultants will be similarly bound.

       4.2 Publication. Section 4.1 to the contrary notwithstanding, the results
obtained in the course of the Research Program may be submitted for publication
following scientific review by the Research Committee and subsequent approval by
the management of OSI and HRPI, respectively. After receipt of the proposed
publication by both HRPI's and OSI's managements, written approval or
disapproval shall be provided within 30 days for a manuscript, an abstract for
presentation at, or inclusion in the proceedings of, a scientific meeting, or a
transcript of an oral presentation to be given at a scientific meeting.


                                      -17-
<PAGE>   19
       4.3 Publicity. Except as required by law, neither party may disclose the
existence of this Agreement or the research described in it without the written
consent of the other party, which consent shall not be unreasonably withheld.

       4.4 Disclosure of Inventions. Each party hereto shall promptly inform the
other about all inventions ("Contract Period Inventions") concerning the Target
Proteins that are conceived, made or developed in the course of carrying out the
Research Program by employees of, or consultants to, either of them, whether
such inventions were conceived, made or developed solely or jointly with
employees of, or consultants to, the other. This Agreement shall not be
construed to obligate either party to disclose to the other any invention which
does not concern the Target Proteins.

       4.5 Restrictions on Transferring Materials. HRPI and OSI recognize that
the biological and biochemical materials which are part of OSI Technology and
HRPI Technology represent valuable commercial assets. Therefore, throughout the
Contract Period and for five (5) years thereafter, OSI and HRPI each agree not
to transfer to any third party except Affiliates any such compound or material
which constitutes Technology owned solely by the other party unless agreed to by
the Research Committee. Additionally, throughout the Contract Period and for six
(6) months thereafter, OSI and HRPI each agree not to transfer to any third
party any such compound or material which constitutes Technology owned solely by
it, unless prior consent for any such transfer is obtained from the other, which
consent shall not be unreasonably withheld, and unless such third party agrees
as a condition of any such transfer not to transfer the material further.


                                      -18-
<PAGE>   20
    5. Intellectual Property Rights.

       5.1 Ownership. All OSI Technology and OSI Patent Rights shall be owned
solely by OSI regardless of whether such OSI Technology or OSI Patent Rights are
developed, conceived, discovered, or invented by employees of, or consultants
to, OSI solely or jointly with employees of, or consultants to, HRPI. All HRPI
Technology and HRPI Patent Rights shall be owned solely by HRPI regardless of
whether such HRPI Technology or HRPI Patent Rights are developed, conceived,
discovered, or invented by employees of, or consultants to, HRPI solely or
jointly with employees of, or consultants to, OSI.

       5.2 Filing, Prosecution and Maintenance of Patent Rights. Subject to
Sections 5.3, 5.4 and 5.5 below, OSI shall have the exclusive right, at its
expense and in its sole discretion to file, prosecute, defend, enforce, and
maintain OSI Patent Rights. HRPI shall have the exclusive right, at its expense
and in its sole discretion to file, prosecute, defend, enforce and maintain HRPI
Patent Rights.

       5.3 Filing, Prosecution and Maintenance of Patents Resulting from the
Research Program. OSI and HRPI will discuss and decide jointly, which party will
have the right and obligation to file patent applications on behalf of OSI or
HRPI, as applicable, on any patentable invention developed by either OSI or HRPI
during the Contract Period relating to the Target Proteins. Both parties will
consult with each other regarding countries in which such patent applications
should be filed. The filing party will file patent applications in those
countries where the other party requests to file patent applications. The filing
party will have to prosecute all patent applications relating to Contract Period
Inventions and to respond to oppositions filed by third parties. The filing
party will have to maintain in force any letters


                                      -19-
<PAGE>   21
patent relating to Contract Period Inventions. The filing party will notify the
other party in a timely manner of any decision to abandon a pending patent
application relating to a Contract Period Invention or an issued patent relating
to a Contract Period Invention. Thereafter the other party shall have the
option, at its expense, of continuing to prosecute any such pending patent
application or of keeping the issued patent in force.

       5.4 Status Reports. The filing party shall provide to the other party
copies of all patent applications relating to Contract Period Inventions
immediately after filing. The filing party shall also provide to the other party
copies of important documents relating to prosecution of all such patent
applications in a timely manner.

       5.5 Reimbursement of Costs for Filing, Prosecuting and Maintaining
Certain Patents. The filing party will be reimbursed for the costs of filing,
prosecuting and maintaining all patent applications and all patents which relate
to Contract Period Inventions in countries where the other party requests that
such patent applications be filed, prosecuted and maintained, upon receipt of
invoices from the filing party. Such reimbursement shall be in addition to
Funding Payments and Supplementary Funding Payments pursuant to Section 3
hereof. However, the other party may, upon 90 days advance written notice,
discontinue reimbursing the filing party for the cost of filing, prosecuting or
maintaining any patent application or any patent in any country. The filing
party shall pay all costs in those countries in which the other party does not
request that the filing party file, prosecute or maintain patent applications
and patents which relate to Contract Period Inventions, but in which the filing
party, at its option, elects to do so.

    6. Other Rights of the Parties. During the Contract Period, OSI and HRPI
shall


                                      -20-
<PAGE>   22
promptly notify each other in writing of asny and all opportunities to acquire
in any manner from third parties, technology or patents which may be useful in,
or may relate to, the Research Program. OSI and HRPI shall decide if such rights
should be acquired and, if so, whether by OSI or HRPI. If acquired, such rights
shall become OSI Technology or HRPI Technology, as appropriate.

    7. Option for License. Upon request of either party to this Agreement, OSI
and HRPI will enter into negotiations with respect to a license agreement
pursuant to which HRPI would acquire an exclusive, worldwide license, including
the right to grant sublicenses, to make, use and sell Licensed Human Therapeutic
Products, and OSI would acquire the exclusive, worldwide license, including the
right to grant sublicenses, to make, use and sell Diagnostic Products, products
sold exclusively for research purposes and OSI Human Therapeutic Products
(derived from HRPI compounds) under all HRPI'S right, title and interest in HRPI
Technology. The option hereinabove provided for will commence with the Effective
Date and expire four (4) years after the end of the Contract Period unless such
option is earlier terminated pursuant to Section 8.4.2 of this Agreement. Such
license agreement shall among other things provide for:

       (a) payments by HRPI to OSI of a royalty of *** of Net Sales (as defined
therein) for each Human Therapeutic Product employing OSI Patent Rights or HRPI
Patent Rights and *** on Net Sales for each Human Therapeutic Product employing
only OSI Technology, or HRPI Technology;

       (b) payments by OSI to HRPI of *** on Net Sales for any Diagnostic
Product using OSI Patent Rights, OSI Technology, HRPI Patent Rights or HRPI
Technology;

*** These portions deleted pursuant to a request for confidential treatment.

                                      -21-
<PAGE>   23
       (c) OSI shall pay a royalty of *** on Net Sales for any OSI Human
Therapeutic Product derived from a HRPI compound if OSI decides to market the
OSI Human Therapeutic Product itself. If OSI decides not to market the OSI Human
Therapeutic Product itself, it shall give HRPI the first right to negotiate for
marketing rights;

       (d) if Patent Rights are involved, payments of the applicable royalty
will be made until the last valid patent claim expires;

       (e) if Technology is involved and there are no valid patent claims,
payments of the applicable royalty will be made with respect to sales in a
Designated Country (as hereinafter defined) until ten (10) years after the first
commercial sale is made in such Designated Country. The Designated Countries are
USA, Canada, Germany, United Kingdom, France, Spain, Italy and Japan; and

       (f) such other customary and other terms as are negotiated between the
parties.

    8. Term, Extension, Termination and Disengagement.

       8.1 Term. Unless sooner terminated or extended, this Agreement shall
expire six years after the Effective Date.

       8.2 Extension. HRPI, at least six months prior to the end of the term,
shall notify OSI in writing if it desires to extend the Sponsored Research
Program. If OSI is willing to extend the Sponsored Research Program, OSI must so
notify HRPI within three (3) months after receipt of HRPI's notice. HRPI and OSI
shall thereafter promptly negotiate in good faith mutually acceptable terms for
any extension to this Agreement.

       8.3 Events of Termination. The following events shall constitute events
of

*** These portions deleted pursuant to a request for confidential treatment.

                                      -22-
<PAGE>   24
termination ("Events of Termination"):

           (a) Any representation or warranty by OSI or HRPI, or any of its
officers, under or in connection with this Agreement shall prove to have been
incorrect in any material respect when made.

           (b) OSI or HRPI shall fail in any material respect to perform or
observe any term, covenant or understanding contained in this Agreement or in
any of the other documents or instruments delivered pursuant to, or concurrently
with, this Agreement, and any such failure shall remain unremedied for 30 days
after written notice to the failing party.

           (c) Either party shall be entitled to terminate this Agreement by
written notice to the other having immediate effect, if the other party is
acquired by or merged with or transfers all of its assets or an essential part
of such assets to, or if fifty percent or more of its voting stock is acquired
by, or otherwise comes under the control of, a person or an organization which
is a competitor of the terminating party, or if any such person or organization
obtains an option or preemption right to acquire fifty percent or more of the
voting stock or otherwise control of the other party, such party shall without
delay inform the party which is entitled to terminate, of such acquisition,
transfer, control, option or preemption right.

       8.4 Termination.

           8.4.1 Upon the occurrence of any Event of Termination, the party not
responsible may, by notice to the other party, terminate this Agreement.


           8.4.2 If HRPI terminates this Agreement pursuant to Section 8.4.1,


                                      -23-
<PAGE>   25
the option of HRPI to negotiate a license provided for in Section 7 shall
continue according to such Section. If OSI terminates this Agreement pursuant to
Section 8.4.1, the option of HRPI to negotiate a license provided for in Section
7 shall also terminate.

           8.4.3 Upon termination of this Agreement, HRPI will reimburse OSI for
any additional work done, or pending, within a six-month period following such
termination.

    9. Representations and Warranties. OSI and HRPI each respectively represents
and warrants as follows:

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

       9.2 The execution, delivery and performance by it of this Agreement have
been duly authorized by all necessary corporate action and do not and will not
(a) require any consent or approval of its stockholders, (b) violate any
provision of any law, rule, regulation, order, writ, judgment, injunction,
decree, determination or award presently in effect having applicability to it or
any provision of its charter or by-laws or (c) result in a breach of or
constitute a default under any material agreement, mortgage, lease, license,
permit or other instrument or obligation to which it is a party or by which it
or its properties may be bound or affected.


                                      -24-
<PAGE>   26
       9.3 This Agreement is a legal, valid and binding obligation of it,
enforceable against it in accordance with its terms and conditions, except as
such enforceability may be limited by applicable bankruptcy, insolvency,
moratorium, reorganization or similar laws, from time to time in effect,
affecting creditor's rights generally.

       9.4 It is not under any obligation to any person, contractual or
otherwise, that is conflicting or inconsistent in any respect with the terms of
this Agreement or that would impede the diligent and complete fulfillment of its
obligations.

       9.5 It has good and marketable title to, or valid leases or licenses for,
all of its properties, rights and assets necessary for the fulfillment of its
responsibilities in the Research Program, subject to no claim of any third party
other than the relevant lessors or licensors.

   10. Covenants of OSI.

       10.1 Affirmative Covenants of OSI Other Than Reporting Requirements.
Throughout the Contract Period, OSI shall:

            10.1.1 maintain and preserve its corporate existence, rights,
franchises and privileges in the jurisdiction of its incorporation, and qualify
and remain qualified as a foreign corporation in good standing in each
jurisdiction in which such qualification is from time to time necessary or
desirable in view of its business and operations or the ownership of its
properties.

            10.1.2 comply in all material respects with the requirements of all
applicable laws, rules, regulations and orders of any government authority to
the extent


                                      -25-
<PAGE>   27
necessary to conduct the Sponsored Research Program.

   11. Dispute Resolution.

       11.1 Any dispute which cannot be resolved by discussion between the
parties under this Agreement shall be resolved by binding arbitration in
accordance with the rules then obtaining of the American Arbitration
Association. The arbitrators shall have the power to award specific performance
or injunctive relief and reasonable attorney's fees and expenses to any party in
such arbitration, except that the arbitrators shall not have the power to reform
this Agreement. Such arbitration shall be held in the main office of the
American Arbitration Association in the City of New York.

       11.2 The arbitration award rendered shall be final and binding upon the
parties and judgement thereon may be entered in any court of competent
jurisdiction.

   12. Notices. All notices shall be mailed via certified mail, return receipt
requested, or courier, addressed as follows, or to such other address as may be
designated from time to time:

   If to HRPI: at its address set forth at the beginning of this Agreement

               Attention: Director of Licensing
                          HOECHST-ROUSSEL Pharmaceuticals, Inc.

   If to OSI:  at its address set forth at the beginning of this Agreement

               Attention: Chief Executive Officer

Notices shall be deemed given as of the date of receipt.

   13. Governing Law. This Agreement shall be construed in accordance with the
laws of the State of New York.

   14. Miscellaneous.


                                      -26-
<PAGE>   28
       14.1 Binding Effect. This Agreement shall be binding upon and inure to
the benefit of the parties and their respective legal representatives,
successors and permitted assigns.

       14.2 Headings. Paragraph headings are inserted for convenience of
reference only and do not form a part of this Agreement.

       14.3 Counterparts. This Agreement may be executed simultaneously in two
or more counterparts, each of which shall be deemed an original.

       14.4 Amendment; Waiver; etc. This Agreement may be amended, modified,
superseded or cancelled, and any of the terms may be waived, only by a written
instrument executed by each party or, in the case of waiver, by the party or
parties waiving compliance. The delay or failure of any party at any time or
times to require performance of any provision shall in no manner affect the
rights at a later time to enforce the same.

       14.5 No Third Party Beneficiaries. No Person not a party to this
Agreement, including any employee of any party to this Agreement, shall have or
acquire any rights by reason of this Agreement. Nothing contained in this
Agreement shall be deemed to constitute the parties partners with each other or
any Person.

       14.6 Assignment and Successors. This Agreement may not be assigned by
either party, except that each party may assign this Agreement and its rights
and interests hereunder, in whole or in part, to any of its Affiliates, any
purchaser of all or substantially all of its assets or to any successor
corporation resulting from any merger or consolidation with or into such
corporation.


                                      -27-
<PAGE>   29
     IN WITNESS WHEREOF, the parties have caused this Agreement to be executed
by their duly authorized representatives. HOECHST-ROUSSEL PHARMACEUTICALS, INC.
ONCOGENE SCIENCE, INC.



By:                                         By:
   ---------------------------------           ---------------------------------
   Title:  President                           Title:  Chief Executive Officer


                                      -28-

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