ONYX PHARMACEUTICALS INC
10-Q, 1997-11-14
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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<PAGE>

                       U.S. SECURITIES AND EXCHANGE COMMISSION
                               WASHINGTON, D.C.  20549
                             ____________________________

                                      FORM 10-Q



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

For the quarterly period ended September 30, 1997

                                          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:  0-28298
                         -------
                                           
                                           
                              ONYX PHARMACEUTICALS, INC.
                (Exact name of registrant as specified in its charter)

Delaware                                         94-3154463
- --------                                         ----------
(State or other jurisdiction of                  (IRS Employer ID Number)
incorporation or organization)

                                 3031 Research Drive
                             Richmond, California  94806
                       (Address of principal executive offices)
                                           
                                    (510) 222-9700
                 (Registrant's telephone number including area code)
                                           
Check whether the issuer (1) filed all reports required to be filed by Section
13 or 15(d) of the Exchange Act during the past 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.  
         (XX)   Yes                    (  )   No

The number of outstanding shares of the registrant's Common Stock, $0.001 par 
value, was 9,825,708 as of October 31, 1997.

<PAGE>

                              ONYX PHARMACEUTICALS, INC.

                                         INDEX
                                           
                                           
                                           
                                           
PART I:  FINANCIAL INFORMATION

                                                                            PAGE

ITEM 1.       Financial Statements                    

                Condensed balance sheets - September 30, 1997 and
                 December 31, 1996                                            3

                Condensed statements of operations - three and nine months  
                 ended September 30, 1997 and 1996                            4

                Condensed statements of cash flows - nine months ended
                 September 30, 1997 and 1996                                  5

                Notes to condensed financial statements                       6

ITEM 2.       Management's discussion and analysis of financial
              condition and results of operations                             9



PART II:  OTHER INFORMATION

ITEM 2.       Change in Securities and Use of Proceeds                       13

ITEM 5.       Other Information                                              14
                                                                               
ITEM 6.       Exhibits and Reports on Form 8-K                               15

SIGNATURES                                                                   16

EXHIBIT INDEX                                                                17


                                       2
<PAGE>

                              ONYX PHARMACEUTICALS, INC.

PART I:  FINANCIAL INFORMATION

ITEM 1:  FINANCIAL STATEMENTS

                               CONDENSED BALANCE SHEETS
                          (In thousands, except share data)


<TABLE>
<CAPTION>
                                                                      
                                                                  September 30,        December 31,
                                                                      1997                 1996
                                                                  -------------        ------------
                                                                   (unaudited)                    
<S>                                                           <C>                 <C>
ASSETS
    Current assets:
         Cash and cash equivalents                               $     12,310        $    36,258 
         Short-term investments                                        22,258              4,071 
         Other current assets                                             626                638
                                                                 ------------        ----------- 
    Total current assets                                               35,194             40,967 

    Property and equipment, net                                         4,393              4,196 
    Notes receivable from related parties                                 866                396 
    Other assets                                                          268                220 
                                                                 ------------        -----------
TOTAL ASSETS                                                     $     40,721        $    45,779 
                                                                 ------------        -----------
                                                                 ------------        -----------

LIABILITIES AND STOCKHOLDERS' EQUITY                                              
    Current liabilities:
         Accounts payable                                        $        543        $       693
         Accrued liabilities                                            3,027              1,277
         Accrued compensation                                             631                439
         Deferred revenue                                               2,169              1,631 
         Long-term debt, current portion                                  208                444 
                                                                 ------------        -----------
    Total current liabilities                                           6,578              4,484
    Long-term debt, noncurrent portion                                      -                 99 
    Deferred rent                                                         133                273

    Stockholders' equity:                                                         
    Preferred stock, $0.001 par value: 5,000,000 shares                                                                
    authorized, none issued and outstanding                                 -                  -   
    Common stock, $0.001 par value: 25,000,000 shares authorized,                                  
    9,822,098 and 9,514,285 shares issued and outstanding
    as of September 30, 1997 and December 31, 1996, respectively           10                 10 
    Additional paid-in capital                                         74,713             71,132 
    Deferred compensation                                                (468)              (632)
    Accumulated deficit                                               (40,245)           (29,587)
                                                                 ------------        -----------
    Total stockholders' equity                                         34,010             40,923 
                                                                 ------------        -----------
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY                       $     40,721        $    45,779 
                                                                 ------------        -----------
                                                                 ------------        -----------
                                                                      
</TABLE>



                               See accompanying notes.

                                          3
<PAGE>

                              ONYX PHARMACEUTICALS, INC.

                          CONDENSED STATEMENTS OF OPERATIONS
                       (In thousands, except per share amounts)
                                     (unaudited)

<TABLE>
<CAPTION>

                                                              Three Months Ended             Nine Months Ended
                                                                 September 30,                 September 30, 
                                                           -------------------------     -------------------------
                                                              1997           1996           1997           1996
                                                           ----------     ----------     ----------     ----------
<S>                                                       <C>            <C>          <C>            <C>
Revenue:
    Contract and other revenue                             $     300      $    739      $    910        $    989
    Contract revenue from related parties                      1,590         1,819         5,280           5,443
                                                           ---------      --------      --------        --------
Total revenue                                                  1,890         2,558         6,190           6,432

Operating expenses  
    Research and development                                   5,489         3,358        14,469          10,441
    General and administrative                                 1,319         1,023         3,912           2,936
                                                           ---------      --------      --------        --------
Total operating expenses                                       6,808         4,381        18,381          13,377
                                                           ---------      --------      --------        --------

Loss from operations                                          (4,918)       (1,823)      (12,191)         (6,945)

Interest income, net                                             511           581         1,533           1,043
                                                           ---------      --------      --------        --------

Net loss                                                   $  (4,407)     $ (1,242)     $(10,658)       $ (5,902)
                                                           ---------      --------      --------        --------
                                                           ---------      --------      --------        --------

Net loss per share                                         $   (0.45)     $  (0.13)     $  (1.10)   
                                                           ---------      --------      --------        
                                                           ---------      --------      --------        

Shares used in computing net loss per share                    9,816         9,461         9,678 
                                                           ---------      --------      --------        
                                                           ---------      --------      --------        

Pro forma net loss per share                                                                            $  (0.73)
                                                                                                        --------
                                                                                                        --------

Shares used in computing pro forma net loss per share                                                      8,059
                                                                                                        --------
                                                                                                        --------
</TABLE>



                               See accompanying  notes.

                                          4
<PAGE>

                             ONYX PHARMACEUTICALS, INC.

                          CONDENSED STATEMENTS OF CASH FLOW
                                    (In thousands)
                                     (unaudited)


<TABLE>
<CAPTION>
                                                                      
                                                                            Nine Months Ended      
                                                                               September 30,       
                                                                    ----------------------------------
                                                                         1997                1996
                                                                    --------------      --------------
<S>                                                              <C>                 <C>
CASH FLOWS FROM OPERATING ACTIVITIES:                                          
    
Net loss                                                             $ (10,658)           $ (5,902)
Adjustments to reconcile net loss to net cash used
    in operating activities:
    Depreciation and amortization                                        1,352               1,129
    Forgiveness of note receivable                                          12                  38
    Amortization of deferred compensation                                  164                 205
    Changes in assets and liabilities:                                                             
         Other current assets                                               12                (105)
         Other assets                                                      (48)                (84)
         Accounts payable                                                 (150)                 33
         Accrued liabilities                                             1,750                 571
         Accrued compensation                                              192                 207
         Deferred revenue                                                  538                (237)
         Deferred rent                                                    (140)                (17)
                                                                     ---------            --------
                                                                                                   
Net cash used in operating activities                                   (6,976)             (4,162)
                                                                     ---------            --------

CASH FLOWS FROM INVESTING ACTIVITIES:

Purchases of short-term investments                                    (30,631)             (9,907)
Sales and maturities of short-term investments                          12,444              12,102
Capital expenditures                                                    (1,549)             (1,067)
Notes receivable from related parties                                     (482)                  -
                                                                     ---------            --------

Net cash provided by (used in) investing activities                    (20,218)              1,128
                                                                     ---------            --------
CASH FLOWS FROM FINANCING ACTIVITIES:

Payments on long-term debt                                                (335)               (313)
Net proceeds from issuance of common stock                               3,581              35,303
                                                                     ---------            --------

Net cash provided by financing activities                                3,246              34,990
                                                                     ---------            --------

Net increase (decrease) in cash and cash equivalents                   (23,948)             31,956

Cash and cash equivalents at beginning of the period                    36,258               3,779
                                                                     ---------            --------
Cash and cash equivalents at end of the period                       $  12,310            $ 35,735
                                                                     ---------            --------
                                                                     ---------            --------
</TABLE>


                               See accompanying  notes.

                                          5
<PAGE>

                             ONYX PHARMACEUTICALS, INC.

                       NOTES TO CONDENSED FINANCIAL STATEMENTS
                                 SEPTEMBER 30, 1997
                                    (unaudited)
                                           

NOTE 1.  BASIS OF PRESENTATION

The accompanying unaudited condensed financial statements have been prepared 
in accordance with generally accepted accounting principles for interim 
financial information and with the instructions to Form 10-Q.  Accordingly, 
they do not include all of the information and footnotes required by 
generally accepted accounting principles for complete financial statements.  
In the opinion of management, all adjustments (consisting of normal recurring 
accruals) considered necessary for a fair presentation have been included.

Operating results for the three and nine months ended September 30, 1997 are 
not necessarily indicative of the results that may be expected for the year 
ending December 31, 1997.  For further information, refer to the financial 
statements and footnotes thereto for the year ended December 31, 1996  
included in the ONYX Pharmaceuticals, Inc. (the "Company" or "ONYX") Annual 
Report on Form 10-K.

NOTE 2.  NET LOSS PER SHARE

Net loss per share is computed using the weighted average number of common 
shares outstanding.  Common equivalent shares are excluded from the 
computation as their effect is antidilutive, except that, pursuant to the 
Securities and Exchange Commission ("SEC") Staff Accounting Bulletins, common 
and common equivalent shares issued during the 12-month period prior to the 
filing of a registration statement in connection with the Company's initial 
public offering at prices below the public offering price of $12.00 have been 
included in the calculation as if they were outstanding for all periods 
presented through March 31, 1996 (using the treasury stock method for stock 
options at the estimated public offering price). 

Pro forma net loss per share for the nine months ended September 30, 1996 has 
been computed as described above and also gives effect to the conversion of 
convertible preferred shares not included above that automatically converted 
upon completion of the Company's initial public offering (using the if 
converted method) from original date of issuance.

Historical net loss per share for the nine months ended September 30,1996 is 
as follows:

                                                         Nine Months Ended
                                                        September 30, 1996
                                                        ------------------

     Net loss per share                                    $     (1.06)
                                                           -----------
                                                           -----------

     Shares used in computing net loss per share           $     5,559
                                                           -----------
                                                           -----------
               
In February 1997, the Financial Accounting Standards Board issued Statement 
No. 128, Earnings per share, which is required to be adopted on December 31, 
1997. At that time, companies will be required to change the method currently 
used to compute earnings per share and to restate all prior periods.  There 
will be no impact on loss per share for the three and nine months ended 
September 30, 1997 and 1996.

                                       6
<PAGE>

                             ONYX PHARMACEUTICALS, INC.

                       NOTES TO CONDENSED FINANCIAL STATEMENTS
                                  SEPTEMBER 30, 1997
                                     (unaudited)
                                           

NOTE 3.  COLLABORATIVE AGREEMENTS

On July 31, 1997, the Company signed a three-year research and development 
agreement with Warner-Lambert aimed at discovering new therapeutics to 
regulate inflammation and autoimmunity.  Terms of the agreement provide for 
receipt by the Company of an up-front licensing fee payable in three stages, 
as well as milestone payments and royalties on eventual product sales.  No 
license fees have been received as of September 30, 1997.  In return, 
Warner-Lambert receives exclusive worldwide marketing rights to products 
emerging from the collaboration.  Total payments to the Company prior to 
commercialization could total nearly $30 million.  Warner-Lambert has the 
option to extend the research term from July 31, 2000 to July 31, 2001 
provided that Warner-Lambert notifies the Company of the extension by July 
31, 1999. Warner-Lambert has the right to terminate the agreement at its 
discretion on January 31, 1999 upon written notice, provided that research 
payments to the Company are continued through July 31, 1999.  In addition, 
Warner-Lambert may terminate the research portion of the agreement, and 
associated research funding and milestone payments, at its discretion if a 
project director acceptable to Warner-Lambert has not been hired by ONYX 
prior to January 31, 1998.

Note  4.  MARKETABLE SECURITIES - AVAILABLE-FOR-SALE

The following is a summary of available-for-sale securities as of September 
30, 1997:

                                                    Available-for-sale
                                                        Securities
                                                   Estimated fair value
                                                       (in thousands)
                                                   --------------------
Cash equivalents:
     U.S. corporate securities                      $       2,400     
     Foreign corporate securities                           1,507     
     Money market funds                                     8,403     
                                                    -------------
Total cash equivalents:                                    12,310    
                                                    -------------
Short-term investments:     
     U.S. corporate securities                             10,483    
     Foreign corporate securities                           4,037     
     U.S. government securities                             2,064     
                                                    -------------
Total short-term investments                               16,584
                                                    -------------
Total available-for-sale securities                 $      28,894     
                                                    -------------
                                                    -------------

As of September 30, 1997, the difference between the fair value and the 
amortized cost of available-for-sale securities was insignificant.  The 
average portfolio duration is approximately two months, and the contractual 
maturity of each of the investments does not exceed two years.  Held at 
September 30, 1997, and excluded from short-term investments above, is 
$5,674,000 of certificates of deposits. 

                                       7
<PAGE>

                             ONYX PHARMACEUTICALS, INC.

                       NOTES TO CONDENSED FINANCIAL STATEMENTS
                                  SEPTEMBER 30, 1997
                                     (unaudited)
                                           

NOTE 5.  LINE OF CREDIT

In March 1997, the Company entered into a $7 million line of credit 
arrangement which bears interest at prime plus 1%.  The line, which 
originally expired on October 15, 1997, has been extended to January 15, 
1998.  The line is secured by certain assets of the Company and contains 
covenants related to maintaining debt-to-equity ratios, tangible net worth 
minimums, cash and investment balances, as well as a restriction on paying 
dividends or repurchasing stock. As of September 30, 1997, no balance was 
outstanding on the line of credit.

                                       8
<PAGE>

                             ONYX PHARMACEUTICALS, INC.

                        MANAGEMENT'S DISCUSSION AND ANALYSIS 
                   OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS
                                           

EXCEPT FOR THE HISTORICAL INFORMATION CONTAINED HEREIN, THIS OVERVIEW AND THE 
FOLLOWING DISCUSSION CONTAIN FORWARD-LOOKING STATEMENTS THAT INVOLVE RISKS 
AND UNCERTAINTIES.  THE COMPANY'S ACTUAL RESULTS COULD DIFFER MATERIALLY FROM 
THOSE DISCUSSED HERE.  FACTORS THAT COULD CAUSE OR CONTRIBUTE TO SUCH 
DIFFERENCES INCLUDE, BUT ARE NOT LIMITED TO, THOSE DISCUSSED IN THE ANNUAL 
REPORT ON FORM 10-K FOR THE YEAR ENDED DECEMBER 31, 1996.

OVERVIEW

Since its inception, ONYX Pharmaceuticals, Inc. (the "Company" or "ONYX") has 
been engaged in the discovery and development of novel therapeutics based 
upon the genetics of human disease, with an emphasis on cancer.  Currently, 
the Company has five therapeutic discovery programs focused on the following 
cancer mutations:  p53, ras, cell cycle, BRCA1 and APC.

The Company intends to pursue its therapeutic discovery programs 
independently and in collaboration with pharmaceutical companies, and to 
collaborate with such companies on the development and commercialization of 
any products which may result from the Company's discovery programs.  The 
Company has entered into collaborative agreements with Bayer Corporation 
("Bayer") in the area of ras oncogenes, Warner-Lambert Company 
("Warner-Lambert") in the cell cycle area and Eli Lilly and Company ("Eli 
Lilly") on the function of the BRCA1 gene in breast cancer.

On July 31, 1997, the Company signed a three-year research and development 
agreement with Warner-Lambert aimed at discovering new therapeutics to 
regulate inflammation and autoimmunity.  The Company believes that expanding 
into the area of inflammation is a natural step for the Company because some 
of the same biochemical pathways that lead to cancer also play an important 
role in the development of inflammatory disorders.  Terms of the agreement 
provide for receipt by the Company of an up-front licensing fee payable in 
three stages, as well as milestone payments and royalties on eventual product 
sales.  No license fees have been received as of September 30, 1997.  In 
return, Warner-Lambert receives exclusive worldwide marketing rights to 
products emerging from the collaboration.  Total payments to the Company 
prior to commercialization could total nearly $30,000,000.  Warner-Lambert 
has the option to extend the research term from July 31, 2000 to July 31, 
2001 provided that Warner-Lambert notifies the Company of the extension by 
July 31, 1999. Warner-Lambert has the right to terminate the agreement at its 
discretion on January 31, 1999 upon written notice, provided that research 
payments to the Company are continued through July 31, 1999.  In addition, 
Warner-Lambert may terminate the research portion of the agreement, and 
associated research funding and milestone payments, at its discretion if a 
project director acceptable to Warner-Lambert has not been hired by ONYX 
prior to January 31, 1998.

During the quarter ended September 30, 1997, the Company updated the results 
from a Phase I human safety study of its ONYX-015 anticancer virus in 
patients with recurrent and refractory head and neck tumors to include the 
results from patients who had received multi-day dosing.  The Company is 
currently conducting Phase II studies of ONYX-015 as a single agent in 
patients with recurrent and refractory tumors of the head and neck.  Three 
Phase I trials are also underway, including pancreatic and ovarian cancers, 
and gastrointestinal cancers that have metastasized to the liver.  In October 
1997, the Company opened a Phase II clinical trial with ONYX-015 in 
combination with two chemotherapeutic drugs.  This clinical trial will 
include head and neck cancer patients with recurrent disease who have not 
previously received chemotherapy.

The Company has not been profitable since inception and expects to incur 
substantial and increasing losses for the foreseeable future, primarily due 
to the expansion of its research and development programs, including clinical 
trials in the p53 program.  The Company expects that losses will fluctuate 
from quarter to quarter and that such fluctuations may be substantial.  As of 
September 30, 1997, the Company's accumulated deficit was $40,245,000.

                                       9
<PAGE>

                             ONYX PHARMACEUTICALS, INC.

RESULTS OF OPERATIONS

THREE AND NINE MONTHS ENDED SEPTEMBER 30, 1997 AND 1996.

REVENUES

The Company's revenues decreased 26% to $1,890,000 and 4% to $6,190,000 for 
the three and nine months ended September 30, 1997, respectively, as compared 
to the same periods in 1996.  Revenues for the 1996 periods were $2,558,000 
and $6,432,000, respectively.  Revenues for the three and nine months ended 
September 30, 1997 and 1996 were attributable to amounts earned for research 
performed under the Company's collaborations with Bayer, Warner-Lambert and 
Eli Lilly.  The decrease in revenues for the three and nine months ended 
September 30, 1997 as compared to the same periods in 1996 is primarily due 
to a milestone payment of $685,000 from Eli Lilly which was received and 
recorded as revenue in the third quarter of 1996.

RESEARCH AND DEVELOPMENT EXPENSES

Research and development expenses increased 63% to $5,489,000 and 39% to 
$14,469,000 for the three and nine months ended September 30, 1997, 
respectively, as compared to the same periods in 1996.  The increase was 
primarily due to additional clinical costs associated with Phase I and Phase 
II clinical trials of ONYX-015, the lead product in the Company's p53 
program.  The Company expects that research and development expenses will 
continue to grow during future periods due to the hiring of personnel and the 
aggressive clinical development plan for ONYX-015.

GENERAL AND ADMINISTRATIVE EXPENSES

General and administrative expenses increased 29% to $1,319,000 and 33% to 
$3,912,000 for the three and nine months ended September 30, 1997, 
respectively, as compared to the same periods in 1996.  The increase was 
primarily due to increased administrative staffing, additional costs incurred 
in connection with corporate development activities and higher expenses 
associated with the Company's reporting and other requirements associated 
with operating as a publicly held company.  General and administrative 
expenses are expected to increase to support the Company's research and 
development efforts.

NET INTEREST INCOME

The Company had net interest income of $511,000 and $1,533,000 for the three 
and nine months ended September 30, 1997, respectively, as compared with 
$581,000 and $1,043,000 for the same periods in 1996.  For the three months 
ended September 30, 1997, interest income decreased over the comparable 
period in 1996 due to a lower average balance of cash, cash equivalents and 
short-term investments.  For the nine months ended September 30, 1997, the 
increase in net interest income reflects the Company's higher average balance 
of cash, cash equivalents and short-term investments following its initial 
public offering of common stock in May 1996.

LIQUIDITY AND CAPITAL RESOURCES

Since inception, the Company's cash expenditures have substantially exceeded 
its revenues.  The Company has relied primarily on the proceeds from the sale 
of equity securities and revenue from collaborative research and development 
agreements to fund its operations.

The Company's cash, cash equivalents and short-term investments were 
$34,568,000 at September 30, 1997, compared with $40,329,000 at December 31, 
1996. Increasing levels of clinical research and product development expenses 
associated with ONYX-015, the lead product in the p53 program, and the higher 
levels of general and administrative expenses resulted in $6,976,000 of cash 
used in operations for the nine months ended September 30, 1997.  This cash 
decline was partially offset by Warner-Lambert's $3,333,000 

                                       10
<PAGE>

                             ONYX PHARMACEUTICALS, INC.


purchase of 192,941 shares of common stock in May 1997.  The Company expects 
cash used in operations will continue to increase as clinical development of 
ONYX-015 progresses.

Total capital expenditures for equipment and leasehold improvements for the 
nine months ended September 30, 1997 were $1,549,000.  The Company expects to 
make expenditures of approximately $750,000 for the remainder of 1997 for 
capital equipment and improvements to its existing facility.

The Company anticipates that its existing capital resources and interest 
thereon, and anticipated revenues from its existing collaborations will be 
sufficient to fund its current and planned operations through the end of 
1998. There can be no assurance, however, that changes in the Company's 
operating expenses will not result in the expenditure of such resources 
before such time, and in any event, the Company will need to raise 
substantial additional capital to fund its operations in future periods.  As 
of September 30, 1997, the Company had $7,000,000 available through a line of 
credit which expires on January 15, 1998.  No balance was outstanding on the 
line of credit at September 30, 1997.

BUSINESS RISKS

The Company is at an early stage of development.  The development of the 
Company's technology and proposed products will require a commitment of 
substantial funds to conduct these costly and time-consuming activities.  All 
of the Company's potential products are in research or development and will 
require significant additional research and development efforts prior to any 
commercial use, including extensive preclinical and clinical testing as well 
as lengthy regulatory approval.  The development of new products is subject 
to a number of significant risks.  Potential products that appear to be 
promising at an early stage of development may not reach the market for a 
number of reasons.  Such risks include the possibilities that the potential 
products will be found ineffective or unduly toxic during clinical trials, 
fail to receive necessary regulatory approvals, be difficult to manufacture 
on a large scale, be uneconomical to market or be precluded from 
commercialization by proprietary rights of third parties.  

In addition, many of the Company's potential products are subject to 
development and licensing arrangements with the Company's collaborators.  
Therefore, the Company is dependent on the research and development efforts 
of these collaborators.  Moreover, the Company is entitled to only a portion 
of the revenues, if any, realized from the commercial sale of any of the 
potential products covered by the collaborations.  Should the Company or its 
collaborators fail to perform in accordance with the terms of any of their 
agreements or terminate such agreements without cause, any consequent loss of 
revenue under the agreements could have a material adverse effect on the 
Company's results of operations. 

There can be no assurance that the Company will be able to maintain existing 
collaborative agreements, negotiate collaborative arrangements in the future 
on acceptable terms, if at all, or that any such collaborative arrangements 
will be successful.  To the extent that the Company is not able to maintain 
or establish such arrangements, the Company would be required to undertake 
such activities at its own expense.

The proposed products under development by the Company have never been 
manufactured on a commercial scale, and there can be no assurance that such 
products can be manufactured at a cost or in quantities necessary to make 
them commercially viable.  The Company has no sales, marketing or 
distribution capability.  If any of its products subject to collaborative 
agreements are successfully developed, the Company must rely on its 
collaborators to market such products.  If the Company develops any products 
which are not subject to collaborative agreements, it must either rely on 
other large pharmaceutical companies to market such products or must develop 
a marketing and sales force with technical expertise and supporting 
distribution capability in order to market such products directly.  

The Company intends to seek additional funding through collaborative 
arrangements, public or private equity or debt financings, capital lease 
transactions or other financing sources that may be available.  However, 
there can be no assurance that additional financing will be available on 
acceptable terms or at all.  If 

                                       11
<PAGE>

                             ONYX PHARMACEUTICALS, INC.

additional funds are raised by issuing equity securities, substantial 
dilution to existing stockholders may result.  If adequate funds are not 
available, the Company may be required to delay, reduce the scope of, or 
eliminate one or more of its research or development programs or to obtain 
funds through collaborative arrangements with others that are on unfavorable 
terms or that may require the Company to relinquish rights to certain of its 
technologies, product candidates or products that the Company would otherwise 
seek to develop itself.

The foregoing risks reflect the Company's early stage of development and the 
nature of its industry and proposed product.  Also inherent in the Company's 
stage of development is a range of additional risks, including competition, 
uncertainties regarding protection of patents and proprietary rights, 
government regulation and uncertainties regarding health care reform. 

                                       12
<PAGE>

                             ONYX PHARMACEUTICALS, INC.

PART II:  OTHER INFORMATION

ITEM 2.   CHANGE IN SECURITIES AND USE OF PROCEEDS

The effective date of the registration statement for the Company's initial 
public offering was May 8, 1996. The net proceeds from this initial public 
offering were $31,159,241. The Company has used the proceeds through the 
quarter ended September 30, 1997 as follows.

Direct or Indirect Payment to Others:

Construction of plant, building and facilities              $    762,450

Purchase and installation of machinery and equipment        $  1,801,249

Repayment of Indebtedness                                   $    583,029

Working Capital                                             $ 27,489,362

Temporary Investment: Cash, Cash Equivalents and
          Short-Term Investments                            $    523,151

               
                                       13
<PAGE>

                             ONYX PHARMACEUTICALS, INC.



ITEM 5.   OTHER INFORMATION

RESULTS OF ONYX-015 PHASE I CLINICAL TRIALS FOR HEAD AND NECK CANCER

Earlier this year, Onyx Pharmaceuticals announced results of a Phase I safety 
trial of its lead anticancer viral therapy, ONYX-015, in patients with 
recurrent and refractory head and neck tumors.  ONYX-015 was found to be safe 
and well-tolerated, as well as biologically active.  

ONYX-015 is a genetically engineered adenovirus that, in prior preclinical 
studies, has been shown to efficiently replicate in and kill tumor cells 
deficient in p53 tumor suppressor gene activity.  Mutations in p53 are the 
most common type of genetic abnormality in cancer, occurring in more than 50 
percent of human cancer cases, including more than 70 percent of recurrent 
and refractory cancers of the head and neck.  ONYX-015 viral replication may 
not be solely dependent on abnormal p53 sequence, but more broadly on lack or 
alteration of p53 function.  

The primary objectives of this Phase I study were to determine the safety of 
directly injecting ONYX-015 into tumors of the head and neck; to determine 
the maximum tolerated dose; and to assess the safety of repeat treatment.  
Patients in this study had previously received a range of treatments 
including surgery, radiation and chemotherapy, individually or in 
combination.  The treated tumors ranged in cross-sectional area from 1 cm2 to 
80 cm2, with a mean of 17 cm2 and median of 14 cm2.

Two dosing regimens were utilized.  The first 19 patients received a single, 
direct intratumoral injection, that could be repeated every 28 days for 
patients whose tumors did not progress after the first injection.  Later, an 
additional nine patients received direct intratumoral injections daily over 
five days, also with the option of repeat treatment.  A final cohort of four 
patients received a single direct intratumoral injection at the highest 
feasible dose level to confirm that the desired dose level for Phase II 
trials is within an acceptable safety margin for virus dosing.  A total of 
thirty-two patients were treated in the Phase I trial, of which eleven 
patients received repeat treatments.  ONYX-015 was well-tolerated and 
investigators observed no dose-limiting toxicities. Mild, transient flu-like 
symptoms were observed in approximately 30% of the single dose patients and 
in approximately 60% of the multiple dose patients.

Researchers also studied the ability of ONYX-015 to replicate in tumors, as 
well as the local and systemic immune response to the virus.  Viral 
replication was detected in two of thirteen patients with evaluable biopsies 
on the single dose regimen, and in four of four patients with evaluable 
biopsies on the multiple dose regimen, six or seven days following injection. 
Approximately 70 percent of the 28 patients tested entered the study with 
neutralizing antibodies to the adenovirus; some of these patients experienced 
tumor necrosis. After treatment, all patients in the study had neutralizing 
antibodies, including those patients who had tumor necrosis.

While the focus of this study was safety, the effect of injection on tumor 
growth was a secondary objective of the study.  Of the 23 patients receiving 
single injection treatment, three experienced more than 50 percent reduction 
in the size of their injected tumors, with one patient experiencing a greater 
than 70 percent decrease.  An additional three patients had significant 
necrosis (greater than 30%) of their injected tumors.  Several patients 
experienced lesser degrees of tumor necrosis, including six whose tumors were 
stable and non-progressive following treatment. In comparison, of the nine 
patients treated with the virus daily for five days three experienced more 
than 50 percent reduction in the size of their injected tumors, with one 
patient experiencing a greater than 70 percent decrease lasting over six 
months. An additional three patients had significant necrosis of their 
injected tumors, and one patient's tumor was non-progressive following 
treatment.  In addition, tumor necrosis was associated with clinical benefit 
in some of the patients, including decreased pain, improved ability to 
swallow and improved speech.  Necrosis was observed primarily in the tumor 
tissue surrounding the site of injection.

                                       14
<PAGE>

                             ONYX PHARMACEUTICALS, INC.

ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K

         a)  Exhibits
          
               Exhibit 10.19*  Amended and Restated Research, Development 
                               and Marketing Collaboration Agreement dated 
                               as of May 2, 1995 between the Registrant and
                               Warner-Lambert Company

               Exhibit 10.20*  Research, Development and Marketing Collaboration
                               Agreement dated as of July 31, 1997 between the 
                               Registrant and Warner-Lambert Company
          
               Exhibit 10.21   Addendum to Credit Terms and Conditions dated 
                               March 10, 1997 between the Registrant and 
                               Imperial Bank.

               Exhibit 11.1    Statement Regarding Computation of Net Loss Per 
                               Share

               Exhibit 27.1    Financial Data Schedule

         b)  Form 8-K

               No reports on Form 8-K were filed during the period covered by 
               this report.

     *  Confidential Treatment Requested

                                       15
<PAGE>

                             ONYX PHARMACEUTICALS, INC.


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.

                             ONYX PHARMACEUTICALS, INC.
                                           

Date:  November 14, 1997         By:/s/ Hollings C. Renton
                                    ----------------------
                                 Hollings C. Renton
                                 President, Chief Executive Officer and Director
                                 (Principal Executive Officer)




Date:  November 14, 1997         By:/s/ Douglas L. Blankenship
                                    --------------------------
                                 Douglas L. Blankenship
                                 Treasurer 
                                 (Principal Financial and Accounting Officer)



                                       16
<PAGE>

                             ONYX PHARMACEUTICALS, INC.

EXHIBIT INDEX

<TABLE>
<CAPTION>
                                                                                          Sequentially
                                                                                          Numbered
Exhibit Number     Description of Exhibits                                                Page
- --------------     -----------------------                                                ----
<S>              <C>                                                                    <C>

     10.19*        Amended and Restated Research, Development and Marketing 
                   Collaboration Agreement dated as of May 2, 1995 between the 
                   Registrant and Warner-Lambert Company
          
     10.20*        Research, Development and Marketing Collaboration Agreement
                   dated as of July 31, 1997 between the Registrant and Warner-
                   Lambert Company
          
     10.21         Addendum to Credit Terms and Conditions dated March 10, 1997
                   between the Registrant and Imperial Bank     

     11.1          Statement Regarding Computation of Net Loss per Share       

     27.1          Financial Data Schedule  

</TABLE>



     *  Confidential Treatment Requested                         



                                       17

<PAGE>

                                           
                                           
                                                                    CONFIDENTIAL
                                           
                                           
                                           
                                           
                                           
                                           
                                 AMENDED AND RESTATED
                         RESEARCH, DEVELOPMENT AND MARKETING
                               COLLABORATION AGREEMENT
                                           
                               DATED AS OF MAY 2, 1995
                                           
                                       BETWEEN
                                           
                              ONYX PHARMACEUTICALS, INC.
                                           
                                         AND
                                           
                                WARNER-LAMBERT COMPANY
                                           


<PAGE>

                                  TABLE OF CONTENTS

                                                                      PAGE

ARTICLE 1.        DEFINITIONS. . . . . . . . . . . . . . . . . . . . . . 1

ARTICLE 2.        RESEARCH PROGRAM . . . . . . . . . . . . . . . . . . . 5

    2.1       Undertaking and Scope. . . . . . . . . . . . . . . . . . . 5
    2.2       Personnel and Resources. . . . . . . . . . . . . . . . . . 6
    2.3       Term of the Research Collaboration . . . . . . . . . . . . 7
    2.4       Rights to Know-How and Patents for Research. . . . . . . . 7
    2.5       Collaboration Expenses . . . . . . . . . . . . . . . . . . 7

ARTICLE 3.        COMMITTEES . . . . . . . . . . . . . . . . . . . . . . 7

    3.1       Research Management Committee. . . . . . . . . . . . . . . 7
    3.2       Marketing Committee. . . . . . . . . . . . . . . . . . . . 8
    3.3       Meetings . . . . . . . . . . . . . . . . . . . . . . . . . 8
    3.4       SAB Attendance . . . . . . . . . . . . . . . . . . . . . . 8

ARTICLE 4.        PATENTS, KNOW-HOW, RIGHTS AND INVENTIONS . . . . . . . 9

    4.1       Rights to Inventions . . . . . . . . . . . . . . . . . . . 9
    4.2       Joint Inventions . . . . . . . . . . . . . . . . . . . . . 9
    4.3       Protection of Patent Rights. . . . . . . . . . . . . . . .10
    4.4       Allegations of Infringement by Third Parties . . . . . . .10

ARTICLE 5.        DESIGNATION OF LEAD COMPOUNDS AND MARKETING RIGHTS . .11

    5.1       Designation of Lead Compound . . . . . . . . . . . . . . .11
    5.2       Collaboration Product. . . . . . . . . . . . . . . . . . .11
    5.3       Independent Development. . . . . . . . . . . . . . . . . .11
    5.4       Warner's Re-engagement Option. . . . . . . . . . . . . . .12

ARTICLE 6.        LICENSES AND ROYALTIES . . . . . . . . . . . . . . . .13

    6.1       Grant by Onyx. . . . . . . . . . . . . . . . . . . . . . .13
    6.2       Grant by Warner. . . . . . . . . . . . . . . . . . . . . .13
    6.3       Royalties Payable by Warner. . . . . . . . . . . . . . . .13
    6.4       Royalties Payable by Onyx. . . . . . . . . . . . . . . . .14
    6.5       Currency of Payment. . . . . . . . . . . . . . . . . . . .15
    6.6       Payment and Reporting. . . . . . . . . . . . . . . . . . .15
    6.7       Records. . . . . . . . . . . . . . . . . . . . . . . . . .15
    6.8       Taxes Withheld . . . . . . . . . . . . . . . . . . . . . .16
    6.9       Computation of Royalties . . . . . . . . . . . . . . . . .16


                                          i.
<PAGE>

                                  TABLE OF CONTENTS
                                     (CONTINUED)

                                                                      PAGE

    6.10      Licenses to Affiliates . . . . . . . . . . . . . . . . . .16
    6.11      Restrictions on Payment. . . . . . . . . . . . . . . . . .16

ARTICLE 7.        CO-PROMOTION OF COLLABORATION PRODUCTS . . . . . . . .17

    7.1       Co-Promotion Rights. . . . . . . . . . . . . . . . . . . .17
    7.2       Election or Revocation of Co-Promotion Right . . . . . . .17
    7.3       Onyx's Promotional Percentage. . . . . . . . . . . . . . .17
    7.4       Marketing and Marketing Plans. . . . . . . . . . . . . . .17
    7.5       Promotional Materials. . . . . . . . . . . . . . . . . . .18
    7.6       No Delegation. . . . . . . . . . . . . . . . . . . . . . .18
    7.7       Returns. . . . . . . . . . . . . . . . . . . . . . . . . .18
    7.8       Orders . . . . . . . . . . . . . . . . . . . . . . . . . .18
    7.9       Samples. . . . . . . . . . . . . . . . . . . . . . . . . .18
    7.10      Completion of Sales. . . . . . . . . . . . . . . . . . . .18
    7.11      Training . . . . . . . . . . . . . . . . . . . . . . . . .18
    7.12      Exchange of Marketing Information. . . . . . . . . . . . .18

ARTICLE 8.        FDA. . . . . . . . . . . . . . . . . . . . . . . . . .19

    8.1       Side Effects . . . . . . . . . . . . . . . . . . . . . . .19
    8.2       Regulatory and other Inquiries . . . . . . . . . . . . . .19
    8.3       Product Recall . . . . . . . . . . . . . . . . . . . . . .19
    8.4       Responsibility if not Co-Promoting . . . . . . . . . . . .19

ARTICLE 9.        RESEARCH FUNDING AND MILESTONES. . . . . . . . . . . .20

    9.1       Research Funding . . . . . . . . . . . . . . . . . . . . .20
    9.2       Milestones . . . . . . . . . . . . . . . . . . . . . . . .20

ARTICLE 10.       CONFIDENTIALITY. . . . . . . . . . . . . . . . . . . .21

    10.1      Confidentiality. . . . . . . . . . . . . . . . . . . . . .21
    10.2      Publicity. . . . . . . . . . . . . . . . . . . . . . . . .22
    10.3      Publication. . . . . . . . . . . . . . . . . . . . . . . .22

ARTICLE 11.       JAPAN. . . . . . . . . . . . . . . . . . . . . . . . .23

    11.1      Japanese Company . . . . . . . . . . . . . . . . . . . . .23
    11.2      Japanese Company Agreement . . . . . . . . . . . . . . . .23
    11.3      Absence of Agreement . . . . . . . . . . . . . . . . . . .24


                                         ii.
<PAGE>

                                  TABLE OF CONTENTS
                                     (CONTINUED)

                                                                      PAGE

ARTICLE 12.       REPRESENTATIONS AND WARRANTIES . . . . . . . . . . . .24

    12.1      Legal Authority. . . . . . . . . . . . . . . . . . . . . .24
    12.2      No Conflicts . . . . . . . . . . . . . . . . . . . . . . .24
    12.3      Others Bound . . . . . . . . . . . . . . . . . . . . . . .24
    12.4      Third Party Rights . . . . . . . . . . . . . . . . . . . .24
    12.5      Survival . . . . . . . . . . . . . . . . . . . . . . . . .25
    12.6      Disclaimer . . . . . . . . . . . . . . . . . . . . . . . .25
    12.7      Exclusivity. . . . . . . . . . . . . . . . . . . . . . . .25

ARTICLE 13     . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25

    13.1      Termination for Breach . . . . . . . . . . . . . . . . . .25
    13.2      Effect of Bankruptcy . . . . . . . . . . . . . . . . . . .26
    13.3      Key Personnel. . . . . . . . . . . . . . . . . . . . . . .26
    13.4      Termination of Co-Promotion Rights . . . . . . . . . . . .26
    13.5      Remedies . . . . . . . . . . . . . . . . . . . . . . . . .27
    13.6      Voluntary Termination. . . . . . . . . . . . . . . . . . .27

ARTICLE 14.       GENERAL PROVISIONS . . . . . . . . . . . . . . . . . .27

    14.1      Indemnification. . . . . . . . . . . . . . . . . . . . . .27
    14.2      Assignment . . . . . . . . . . . . . . . . . . . . . . . .28
    14.3      Non-Waiver . . . . . . . . . . . . . . . . . . . . . . . .28
    14.4      Research Dispute Resolution. . . . . . . . . . . . . . . .28
    14.5      Governing Law. . . . . . . . . . . . . . . . . . . . . . .28
    14.6      Partial Invalidity . . . . . . . . . . . . . . . . . . . .28
    14.7      Notice . . . . . . . . . . . . . . . . . . . . . . . . . .29
    14.8      Vaccines and Diagnostics . . . . . . . . . . . . . . . . .29
    14.9      Headings . . . . . . . . . . . . . . . . . . . . . . . . .30
    14.10     No Implied Licenses or Warranties. . . . . . . . . . . . .30
    14.11     Force Majeure. . . . . . . . . . . . . . . . . . . . . . .30
    14.12     Survival . . . . . . . . . . . . . . . . . . . . . . . . .30
    14.13     Entire Agreement . . . . . . . . . . . . . . . . . . . . .30
    14.14     Amendments . . . . . . . . . . . . . . . . . . . . . . . .31
    14.15     Independent Contractors. . . . . . . . . . . . . . . . . .31
    14.16     Counterparts . . . . . . . . . . . . . . . . . . . . . . .31


                                         iii.
<PAGE>



                            AMENDED AND RESTATED RESEARCH,
                              DEVELOPMENT AND MARKETING
                               COLLABORATION AGREEMENT




    THIS AMENDED AND RESTATED RESEARCH, DEVELOPMENT AND MARKETING COLLABORATION
AGREEMENT (the "Agreement") is made and entered into by and between ONYX
PHARMACEUTICALS, INC., a California corporation located at 3031 Research Drive,
Richmond, California 94806 ("Onyx"), and WARNER-LAMBERT COMPANY, a Delaware
corporation located at 201 Tabor Road, Morris Plains, New Jersey 07950
("Warner").  This Agreement is executed on July 31, 1997 but is deemed by the
parties to be effective as of May 2, 1995 and shall supersede and replace the
original Research, Development and Marketing Agreement between Onyx and Warner
dated as of May 2, 1995.

                                 W I T N E S S E T H:

    WHEREAS, Onyx and Warner each has certain expertise in the discovery and
development of agents acting in the field of cell cycle control; and


    WHEREAS, Warner and Onyx each wish to enter into a collaborative effort to
share such expertise, to develop new expertise in the field of cell cycle
control, to research together potential applications thereof and, if successful,
to market certain of such applications (the "Collaboration"); and


    WHEREAS, Warner and Onyx entered into that certain Research, Development
and Marketing Agreement dated as of May 2, 1995, and they now wish to amend and
restate the terms of such agreement by entering into this Agreement, thereby
superseding and replacing such earlier agreement;


    NOW, THEREFORE, in consideration of the foregoing premises and the mutual
promises, covenants and conditions contained herein, Onyx and Warner agree as
follows:

                                      ARTICLE 1

                                     DEFINITIONS


    The following capitalized terms shall have the meanings indicated for
purposes of this Agreement:


    "AFFILIATE" shall mean any corporation, association or other entity which
directly or indirectly controls, is controlled by or is under common control
with the party in 


                                          1.
<PAGE>

question.  As used herein the term "control" means possession of the power to
direct, or cause the direction of, the management and policies of a corporation,
association or other entity.


    "COLLABORATION COMPOUND" shall mean any compound identified by either party
during the Research Term or one year thereafter as showing sufficient activity
against targets in the Field identified by the Research Management Committee in
assays contributed to or developed under the Collaboration such that further
research on such compound for such target is pursued, and any analogs or
derivatives of such compounds whenever identified.


    "COLLABORATION LEAD COMPOUND" shall mean any Collaboration Compound
selected by Warner for further development as provided in Section 5.1.


    "COLLABORATION PRODUCT" shall mean any Collaboration Lead Compound for
which an IND or foreign equivalent application has been filed, as provided in
Section 5.2.


    "COLLABORATION PRODUCT EXCLUSIVE PERIOD" shall have the meaning set forth
in Section 5.3.

    "CO-PROMOTION COUNTRY" shall mean the United States of America and its
territories and possessions, including the Commonwealth of Puerto Rico.


    "EFFECTIVE DATE" shall mean May 2, 1995.


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


    "FIELD" shall mean research, drug discovery and development collaboration
aimed at therapeutic agents to restore control of, or otherwise intervene in,
misregulated cell cycle transitions in tumor cells, vascular smooth muscle
cells, or other pathological conditions, in each case insofar as it relates to
the targets listed below.  Such agents may restore growth control and/or result
in death of cells with aberrant control.

The Collaboration will seek to identify agents that modulate biological targets
within the Field.  The Collaboration will include all therapeutic benefits of
such agents.

The Field will consist initially of [**].  The Field shall also include the [**]


[**] Confidential Treatment Requested


                                          2.
<PAGE>

[**].  The Field will also include [**].

The parties may agree during the Term of the Research Collaboration to expand
the Field by designating additional targets, and it is their intention to do so
in the event logical extensions of the Field are identified and may be
accommodated within the resource commitment of the parties.  Such expansion will
be in writing signed by all members of the Research Development Committee. 
However, neither party shall be obligated to agree to expand the Field.

Notwithstanding the general description of the Field provided above, the Field
will exclude:


         (a)  All molecular entitles that are part of or that regulate [**]. 
This includes but is not restricted to [**].  This also includes molecules that
directly or indirectly regulate the aforementioned molecules, [**].  This also
includes [**].  This exception shall not include (by way of example and not
limitation) [**]

    [**] shall mean therapeutics where the active agent is [**].[**]
specifically excludes [**].  


    "IND" shall mean an Investigational New Drug Application.


[**] Confidential Treatment Requested


                                          3.
<PAGE>

    "INVENTION" shall mean any invention, idea, data, know-how or material that
is discovered or reduced to practice during the Term of this Agreement [**] and
that relates to the discovery, design, synthesis, delivery, development,
testing, use, manufacture or sale of agents acting in the Field.

    "KNOW-HOW" shall mean Onyx Know-How and/or Warner Know-How, as the case may
be.

    "MHW" shall mean the Ministry of Health and Welfare of Japan.

    "NDA" shall mean a New Drug Application.

    "NET SALES" shall mean the gross amount invoiced by a party hereto or one
of its Affiliates to customers who are not Affiliates of the selling party for
all Products sold to such customers, less the following deductions calculated in
accordance with United States generally accepted accounting principles and
Warner's (or Onyx's, as the case may be) normal internal accounting standards
consistently applied: (i) trade, quantity and cash discounts or rebates; (ii)
credits, rebates, charge-back rebates, reimbursements or similar payments
granted or given to wholesalers and other distributors, buying groups,
healthcare insurance carriers, governmental agencies and other institutions,
provided that such provisions will not grant a preference or otherwise favor
other products of Warner or Onyx, as the case may be, if based on the fact that
a royalty may be payable hereunder; (iii) credits or allowances for rejection or
return of such Product previously sold; (iv) any tax, tariff, duty or other
governmental charge (other than an income tax) levied on the sale,
transportation or delivery of a Product and borne by the seller thereof; (v)
payments or rebates paid in connection with state or federal Medicare, Medicaid
or similar programs; (vi) any charge for freight or insurance; and (vii)
allowance for bad debt expense.  Any such deductions, if not for amounts
actually incurred or allowed with respect to the specific Products sold, shall
be no greater than the pro rata amount allocable to such Product, based on the
invoices for similar pharmaceutical products sold by the selling party, of the
total amount of such deductions allowed or incurred for all such similar
products.  In the event that the selling party recognizes revenue due to excess
balance sheet reserves associated with the net sales deductions described above,
the pro rata amount of such revenue allocable to the Product shall be deemed Net
Sales hereunder, at the time such revenue is recognized.

    "ONYX KNOW-HOW" shall mean all technology, inventions, information, data,
know-how, compounds and materials that (i) are not Onyx Patents, (ii) Onyx owns
or otherwise has the right to license to Warner and (iii) relate to the
discovery, design, synthesis, delivery, development, testing, use, manufacture
or sale of agents with activity in the Field.  Excluded from "Onyx Know-How" are
compounds and information relating to compounds that have been identified by
Onyx as candidates for cGLP/cGMP studies 


[**] Confidential Treatment Requested


                                          4.
<PAGE>

on or before the Effective Date, or are hereafter so identified without material
application of information provided by Warner or developed by either party
pursuant to the Collaboration.

    "ONYX LEAD COMPOUND" shall mean a Collaboration Compound that Onyx obtains
the right to develop independently as provided in Section 5.3.

    "ONYX PATENTS" shall mean all United States and foreign patents that are
owned by Onyx or that Onyx otherwise has the right to license to Warner and that
relate to the discovery, design, synthesis, delivery, development, testing, use,
manufacture or sale of agents with activity in the Field, including, without
limitation, all reissues, extensions, substitutions, confirmations,
registrations, revalidations, additions, continuations, continuations-in-part,
and divisions thereof.  Excluded from "Onyx Patents" are patents and patent
applications that claim compounds and information relating to compounds that
have been identified by Onyx as candidates for cGLP/cGMP studies on or before
the Effective Date, or are hereafter so identified without material application
of information provided by Warner or developed pursuant to the Collaboration.

    "ONYX PRODUCT" shall have the meaning set forth in Section 5.3.

    "ONYX PRODUCT EXCLUSIVE PERIOD" shall have the meaning set forth in Section
5.4.

    "PATENTS" shall mean, Onyx Patents and/or Warner Patents, as the case may
be.

    "PRODUCTS" shall mean Collaboration Products and/or Onyx Products, as
applicable.

    "RESEARCH MANAGEMENT COMMITTEE" shall mean that entity organized and acting
pursuant to Section 3.1.

    "RESEARCH PLAN" shall have the meaning set forth in Section 2.1.

    "TERM OF CO-PROMOTION" for a Collaboration Product shall mean the period
beginning upon the first commercial sale of a Collaboration Product in the
Co-Promotion Country and [**].

    "TERM OF THIS AGREEMENT" shall mean the period from the Effective Date
until the expiration of all licenses granted pursuant to this Agreement or until
this Agreement is otherwise terminated pursuant to its terms.

    "TERM OF THE RESEARCH COLLABORATION" shall have the meaning set forth in
Section 1.3.


[**] Confidential Treatment Requested


                                          5.
<PAGE>

    "WARNER KNOW-HOW" shall mean all technology, inventions, information, data,
know-how, compounds and materials that (i) are not Warner Patents, (ii) Warner
owns or otherwise has the right to license to Onyx and (iii) relate to the
discovery, design, synthesis, delivery, development, testing, use, manufacture
or sale of agents with activity in the Field.  Excluded from "Warner Know-How"
are (i) Warner's high-volume screening technology and (ii) compounds and
information relating to compounds that have been identified by Warner as
candidates for cGLP/cGMP studies on or before the Effective Date, or are
hereafter so identified without material application of information provided by
Onyx or developed by either party pursuant to the Collaboration.

    "WARNER PATENTS" shall mean all United States and foreign patents that are
owned by Warner or that Warner otherwise has the right to license to Onyx and
that relate to the discovery, design, synthesis, delivery, development, testing,
use, manufacture or sale of agents with activity in the Field,  including,
without limitation, all reissues, extensions, substitutions, confirmations,
registrations, revalidations, additions, continuations, continuations-in-part,
and divisions thereof.  Excluded from "Warner Patents" are patents and patent
applications that claim (i) Warner's high volume screen technology and (ii)
compounds and information relating to compounds that have been identified by
Warner as candidates for cGLP/cGMP studies on or before the Effective Date, or
are hereafter so identified without material application of information provided
by Onyx or developed pursuant to the Collaboration.

                                      ARTICLE 2

                                   RESEARCH PROGRAM

    2.1  UNDERTAKING AND SCOPE.  From time to time the Research Management
Committee will agree on the general direction of the research to be performed
hereunder.  The correspondence and other material documenting such agreement are
collectively referred to herein as the "Research Plan."  Each party agrees to
use its best efforts to perform the activities detailed in the Research Plan, in
a professional and timely manner.  Onyx agrees to use its best efforts at its
cost [**] to (i) develop and transfer to Warner [**] screening assays [**] of
the Term of the Research Collaboration for specific targets in the Field
selected by the Research Management Committee, (ii) supply protein required to
run such screens and (iii) provide for the testing of substantially all of
Onyx's compound library in such screens.  Onyx shall not knowingly provide or
perform research on any compounds the use of which would require a royalty or
other payment to any third party, unless the Research Management Committee
agrees that such compound should be provided and the parties agree in writing
how such royalty or other payment will be paid.  Warner agrees to use its best
efforts at its cost (including the cost of any royalties or other amounts
payable by Warner to third parties) to (i) screen substantially all of its
compound 


[**] Confidential Treatment Requested


                                          6.
<PAGE>

library with such screens provided by Onyx and (ii) conduct medicinal chemistry
and animal pharmacology as the Research Management Committee deems appropriate. 
Promptly after the Effective Date, Onyx and Warner will disclose to each other
all information possessed by it relevant to the Field and necessary or helpful
to perform the work described in the Research Plan (except to the extent
precluded by the pre-existing confidentiality obligations described on Schedule
1 hereto).  During the Term of the Research Collaboration, or [**] thereafter,
the Research Management Committee and either party individually may from time to
time declare any compound that meets the definition therefor in Article 1 to be
a Collaboration Compound.  Notwithstanding the foregoing, neither party will be
required to offer the other party any compounds or information relating to
compounds that have been identified as candidates for cGLP/cGMP studies on or
before the Effective Date, or are hereafter so identified without material
application of information provided by the other party or developed pursuant to
the Collaboration.  Neither party shall be required to screen under this
Collaboration or to offer to the other party any information regarding any
compounds identified as having activity in pathways expressly excluded from the
Field, if so identified prior to being designated a "Collaboration Compound"
hereunder.  

    2.2  PERSONNEL AND RESOURCES.  Each party agrees to commit the personnel,
facilities, expertise and other resources needed to perform this Agreement in
accordance with its terms; provided, however, that neither party warrants that
the Collaboration shall achieve any of the research objectives contemplated by
them. During the Term of the Research Collaboration, Warner and Onyx will each
maintain at its cost an average of 15 full-time equivalents ("FTEs") devoted to
cooperative work under the Research Plan.  During the first-year of the Term of
the Research Collaboration Warner need maintain [**] FTEs; provided however,
that Warner will staff at higher levels in later periods to achieve an average
of 15 FTEs during the Term of the Research Collaboration, unless such term is
terminated early as permitted hereunder.  The scientific priorities and
direction of such staff of both parties will be determined by the Research
Management Committee.  Such staff will include, as appropriate, scientists in
the areas of mass screening, molecular biology, biochemistry, biochemical
pharmacology, cancer and cardiovascular pharmacology, synthetic chemistry
(including peptide synthesis), computer-assisted drug design, and analytical
chemistry (e.g., NMR spectroscopy).

    2.3  TERM OF THE RESEARCH COLLABORATION.  Work under the Research Plan will
commence as of the date of this Agreement and, unless terminated earlier by
either party pursuant to the terms of this Agreement or extended by mutual
agreement of the parties, will terminate on the third anniversary hereafter (as
terminated, expired or extended, the "Term of the Research Collaboration").  

    2.4  RIGHTS TO KNOW-HOW AND PATENTS FOR RESEARCH.  Each party hereby grants
and agrees to grant to the other a non-exclusive, royalty-free license to use
such 


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party's Know-How and Patents that are conceived or reduced to practice prior to
the [**] anniversary of the end of the Term of the Research Collaboration for
(a) research and development purposes in the Field and (b), beginning [**] after
termination of the Term of the Research Collaboration, research and development
outside of the Field; provided, however, that the granting party may terminate
such licenses granted by it immediately upon its termination of this Agreement
for cause.  Notwithstanding the foregoing, neither party is granted any interest
in the other's compounds (or analogs or derivatives thereof) except as
specifically set forth in this Agreement.  In the event that one party does
nonetheless conceive or reduce to practice any invention that is comprised of
the other party's compound (or analog or derivative thereof) and if such
invention is not in the Field, such party will promptly assign its entire
interest therein exclusively to the other party without charge and will not be
entitled to any milestones, royalties or other consideration in connection
therewith.  

    2.5  COLLABORATION EXPENSES.  [**] the costs and expenses of work done
pursuant to the Collaboration at [**].

    2.6  NEW ZEALAND RESEARCH WORK.  Onyx acknowledges that Warner has amended
its existing agreement with the Auckland Division, Cancer Society of New
Zealand, Inc. ("CSNZ"), dated December 15, 1988 (as amended, the "Warner/CSNZ
Agreement"), to expand the field of research to be jointly conducted by Warner
and CSNZ to include the research in the cell cycle field which is the focus of
the collaborative research project being conducted pursuant to this Agreement. 
Onyx is willing to permit Warner to conduct such research under the Warner/CSNZ
Agreement, subject to the following terms:

         (a)  As used in this Section 2.6, the term "ADDITIONAL RESEARCH" shall
    have the meaning set forth in Section 1.04a of the Warner/CSNZ Agreement.  

         (b)  The term "Collaboration Compounds" as used in this Agreement
    shall also include any compounds identified as a result of the Additional
    Research conducted by CSNZ or Warner in collaboration with CSNZ pursuant to
    the Warner/CSNZ Agreement.  Any work performed by CSNZ and Warner under
    such Additional Research shall be considered to be work performed by the
    parties pursuant to this Agreement.

         (c)  For the avoidance of doubt, and notwithstanding any other
    interpretation of the Agreement, Warner and Onyx hereby agree that the
    royalties payable by Warner under Section 6.3 shall not be reduced by any
    royalty or other payments payable by Warner to CSNZ pursuant to the
    Warner/CSNZ Agreement, whether by offset, credit or otherwise.


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                                      ARTICLE 3

                                      COMMITTEES

    3.1  RESEARCH MANAGEMENT COMMITTEE.  Warner and Onyx will each appoint up
to 4 representatives to a research management committee (the "Research
Management Committee"), which will oversee the operational aspects of performing
the Research Plan.  The Research Management Committee will assure that agendas
and minutes are prepared for each of its meetings.  The personnel, facilities,
expertise and other resources of each party to be used in performance of the
Research Plan shall be established by the Research Management Committee.  The
Research Management Committee will meet quarterly, or more frequently if
mutually agreed.  Warner's and Onyx's initial representatives to the Research
Management Committee will be appointed by each of them promptly after the date
of this Agreement.  All actions taken and decisions made by the Research
Management Committee shall be by unanimous agreement.  A party may change any of
its appointments to the Research Management Committee at any time upon giving
written notice to the other party.

    3.2  MARKETING COMMITTEE.  At the time that Warner appoints a committee to
plan the marketing of a Collaboration Product (the "Marketing Committee"), it
shall promptly inform Onyx and for so long as Onyx has the right to co-promote
such Collaboration Product, Onyx shall have the authority to appoint one of its
employees as a non-voting member of such committee.  Onyx's non-voting member of
the Marketing Committee will have the right to attend all meetings of the
Marketing Committee and will be kept current on the plans and proceedings of the
Marketing Committee.  All actions taken and decisions made by the Marketing
Committee shall be under the direction and control of Warner.  A party may
change any of its appointments to the Marketing Committee at any time upon
giving written notice to the other party.

    3.3  MEETINGS.  The Research Management Committee and the Marketing
Committee may meet by telephone or in person at such times as are agreeable to
the members of each such committee.  Attendance at meetings shall be at the
respective expense of the participating parties.  Warner and Onyx shall
alternate the right to determine the location of each meeting of the Research
Management Committee, with Onyx determining the location of the first meeting of
such committee.  Warner shall determine the location of all meetings of the
Marketing Committee.

    3.4  SAB ATTENDANCE.  During the Term of this Agreement, Warner will be
entitled to have up to three of its representatives attend all meetings of
Onyx's Scientific Advisory Board that relate directly to the Field and such
other general symposia that do not contain confidential information outside the
Field of Onyx or of any third party to which Onyx owes a duty of confidentiality
that would be breached by Warner's 


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attendance.  Onyx will provide Warner reasonable advance notice of all such
meetings and will provide Warner copies of all written material given to the
members of the Scientific Advisory Board in connection with such meetings. 
Attendance at such meetings by Warner's representatives will be at Warner's
expense.  As a condition of such attendance and access to such written material,
Warner will execute appropriate confidentiality agreements with respect to
information disclosed at such meetings and in such written material.

                                      ARTICLE 4

                       PATENTS, KNOW-HOW, RIGHTS AND INVENTIONS

    4.1  RIGHTS TO INVENTIONS. 

         (a)  Ownership of all Inventions and any other technology,
information, data, know-how, compounds and material developed, discovered or
made hereunder shall be determined in accordance with United States laws of
inventorship.  The owner (the "Inventor") of any Invention shall have the right,
at its option and expense, to prepare, file and prosecute in its own name any
patent applications with respect to any Invention owned by it and to maintain
any patents issued.  In connection therewith, the non-Inventor party agrees to
cooperate with the Inventor at the Inventor's expense in the preparation and
prosecution of all such patent applications and in the maintenance of any
patents issued.  This obligation shall survive the expiration or termination of
this Agreement.  

         (b)  The parties will co-own technology, inventions, information,
data, know-how, compounds and materials (whether or not patentable) that relate
to [**] and that are developed in connection with performance of the Research
Plan ("[**] Inventions").  The parties will cooperate in the joint filing of
patent applications claiming [**] Inventions.  The parties will negotiate in
good faith regarding the collaborative commercial exploitation of the [**]
Inventions; provided, however, that each party will retain an undivided
ownership interest in the [**] Inventions and will be free to exploit the same
without obligation to the other party.

    4.2  JOINT INVENTIONS.  Inventions that are jointly invented by Onyx and
Warner will be jointly owned by them; however, [**] will have the rights and
responsibilities of the "Inventor" as described in this Article 4 in respect of
any such patentable, jointly owned Inventions and [**] shall have the rights and
responsibilities of a non-Inventor therein.  [**] shall pay all expenses in
connection with its preparation, filing and prosecution of patent applications
that claim patentable, jointly owned Inventions.  [**] shall from time to time
notify [**] of the amount of such expenses and [**] 


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shall promptly thereafter pay [**] of its out-of-pocket expenses.  As used in
the preceding sentence "out-of-pocket expenses" shall mean direct costs,
excluding internal labor costs.  Onyx may elect in writing to disclaim all
interest in any jointly invented Invention, in which case (i) such Invention
will be solely owned by Warner and Onyx will co-operate to assure Warner's sole
ownership, (ii) Onyx will have no further interest in such Invention, by
ownership, license or otherwise and (iii) [**] the date that Warner receives
Onyx's written disclaimer.  Warner may elect in writing to disclaim all interest
in any jointly invented Inventions, in which case (i) such Invention will be
solely owned by Onyx and Warner will co-operate to assure Onyx's sole ownership,
(ii) Warner will have no further interest in such Invention, by ownership,
license or otherwise and (iii) [**].

    4.3  PROTECTION OF PATENT RIGHTS.  (a)  The Inventor shall keep the other
party currently informed of all steps to be taken in the preparation,
prosecution and maintenance of all of its patents and patent applications which
claim an Invention and shall furnish the other party with copies of patents and
applications, amendments thereto and other related correspondence relating to
such Invention to and from patent offices and permit the other party to offer
its comments thereon before the Inventor makes a submission to a patent office
which could materially affect the scope or validity of the patent coverage that
may result.  The non-Inventor party shall offer its comments promptly.  Onyx and
Warner shall each promptly notify the other of any infringement and/or
unauthorized use of an Invention which comes to its attention.

         (b)  The non-Inventor party may request in writing that the Inventor
take specific, reasonable actions to (i) prepare, file or prosecute a patent
application with respect to an Invention, (ii) maintain any patents issued with
respect to an Invention, (iii) protect against abandonment of a patent or
application which claims an Invention or (iv) obtain a discontinuance of an
infringement or unauthorized use of such patent or application.  If such actions
are not undertaken within thirty days of the Inventor's receipt of such written
request and timely pursued thereafter, the Inventor shall permit, and the
non-Inventor party at its option and expense may undertake, such actions.  The
party not undertaking such actions shall fully cooperate with the other party
and shall provide to the other party whatever assignments and other documents
that may be needed in connection therewith.  The party not undertaking such
actions may require a suitable indemnity against all damages, costs and expenses
and impose such other reasonable conditions as such party's advisors may
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         (c)  If either party commences any actions or proceedings (legal or
otherwise) pursuant to this Section, it shall prosecute the same vigorously at
its expense and shall not abandon or compromise them or fail to exercise any
rights of appeal without giving the other party the right to take over their
conduct at its own expense.  The party finally conducting legal actions or
proceedings against an alleged infringer or other party shall be entitled to any
damages or costs awarded against such infringer or other party.

    4.4  ALLEGATIONS OF INFRINGEMENT BY THIRD PARTIES.  In the event that
Warner or Onyx receives notice that any action by either of them under this
Agreement is alleged to be a violation of the patent or other intellectual
property rights of a third party, it shall notify the other party to this
Agreement, and they shall jointly determine an appropriate response and course
of action.  The costs of such defense, and any damages, costs or expenses
resulting from such action, shall be paid [**].  The Research Management
Committee will decide whether or not to continue any activity following notice
that such activity may be a violation of the patent or other intellectual
property rights of a third party. 

                                      ARTICLE 5

                  DESIGNATION OF LEAD COMPOUNDS AND MARKETING RIGHTS

    5.1  DESIGNATION OF LEAD COMPOUND.  From time to time, Warner may formally
designate one or more Collaboration Compounds for further development, and such
designated compounds shall be deemed Collaboration Lead Compounds.  Such
designation shall be made under Warner's then current standards for declaring
one of its own compounds a "lead compound."  Such designation generally
indicates that Warner has identified such compound as a candidate for cGLP/cGMP
studies. Warner will pursue the research and development of each Collaboration
Lead Compound at its own expense and under its sole direction.  Warner will
provide Onyx quarterly, written updates regarding the status of each
Collaboration Lead Compound.

    5.2  COLLABORATION PRODUCT.  Each Collaboration Lead Compound shall be
referred to herein as a "Collaboration Product" from and after filing of an IND
in respect of such compound with the FDA or the filing of its equivalent in any
foreign country other than Japan.  The preparation, filing and prosecution of
IND's, NDA's and other regulatory filings required to be filed with the FDA and
its foreign equivalents (other than in Japan) in regard to any Collaboration
Product will be at the sole expense of, in the 


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name of and under the direction of Warner.  Warner does not warrant that any
regulatory filings will actually be filed or, if filed, will be approved.  

    5.3  INDEPENDENT DEVELOPMENT.  From time to time, Onyx may request Warner
in writing to undertake specific research and development regarding a
Collaboration Compound or to declare a Collaboration Compound to be a
Collaboration Lead Compound.  Warner will notify Onyx within [**] of receiving
Onyx's written request if it determines before such date that it will not
undertake such specific research and development (or declare such Collaboration
Compound to be a Collaboration Lead Compound) within [**] of such request
("Warner's Notice to Decline").  If Warner does not so notify Onyx within such
[**] period, it will periodically review Onyx's request and if it determines not
to undertake such specific research and development (or declare such
Collaboration Compound to be a Collaboration Lead Compound) then it shall
promptly so notify Onyx (also, "Warner's Notice to Decline").  After either (i)
receipt of Warner's Notice to Decline, or (ii) if Warner does not so notify Onyx
and if Warner does not itself undertake the requested action within [**] of
Onyx's written request, then the date [**] after Warner's receipt of Onyx's
written request, then Onyx shall undertake continued research and development
(including the specific research and development requested by Onyx in its
request to Warner) of such Collaboration Compound independently (an "Onyx Lead
Compound"), at its sole cost and under its sole direction.  Onyx may not utilize
the services of the personnel committed to the Collaboration pursuant to Section
2.2 in performance of research or development of an Onyx Lead Compound.  Onyx
may declare no more than [**] Onyx Lead Compounds during the Term of this
Agreement.  Onyx will keep Warner currently informed of all material information
in its research and development of each Onyx Lead Compound and will allow Warner
to comment on the direction of such research and development.  Each Onyx Lead
Compound is referred to herein as an "Onyx Product" from and after filing of an
IND in respect of such compound with the FDA or the filing of its equivalent in
any foreign country other than Japan.  Onyx will provide Warner a complete and
accurate copy of the proposed filing, together with any additional information
that Warner may request regarding the relevant Onyx Lead Compound, at least [**]
prior to submitting such filing to the FDA or its foreign equivalent.  Onyx will
be entitled to commercialize any Onyx Product at its sole direction, alone or
with another partner, subject to Section 5.4 and the other terms of this
Agreement.  

    5.4  WARNER'S RE-ENGAGEMENT OPTION.  Warner may elect in writing to Onyx to
resume the research and development of an Onyx Lead Compound at its own cost and
under its sole direction at any time prior to [**] in respect of such compound. 
In such event, such Onyx Lead Compound shall immediately become a Collaboration
Lead Compound for all purposes under this Agreement.  Promptly after Warner
makes such election, Warner will pay Onyx [**] Onyx's costs incurred for
research and development of such Onyx Lead Compound.  For purposes of this
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Onyx's cost for research and development will mean (i) Onyx's "Burdened Cost"
(as defined below) for each professional research and development FTE (not
including the personnel committed to the Collaboration pursuant to Section 1.2)
dedicated to the research and development of such Onyx Lead Compounds (with
appropriate adjustment for staff members not fully dedicated to such work or not
working a full year) and (ii) payments made to unaffiliated third parties, each
to the extent incurred in connection with the relevant compound on or after its
declaration as an Onyx Lead Compound and to the extent reasonably supported by
invoices, time sheets or other appropriate records.  The "Burdened Cost" for
each Onyx FTE shall mean [**] for work performed during 1995, and will be
revised for work performed during each succeeding calendar year by the change in
the Consumer Price Index (as determined by the United States of America
Department of Labor) during the preceding calendar year (except that the
Burdened Cost for work performed during 1996 will be revised only by the change
in the Consumer Price Index from the Effective date to December 31, 1995).

                                      ARTICLE 6

                                LICENSES AND ROYALTIES

    6.1  GRANT BY ONYX.  Onyx hereby grants and agrees to grant to Warner
exclusive, worldwide (except for Japan) licenses under the Onyx Patents solely
to make, have made, use and sell (with the right to sublicense) each compound
designated as a Collaboration Lead Compound or as a Collaboration Product.  Such
licenses with respect to a Collaboration Lead Compound are co-exclusive between
Onyx and Warner.  Such licenses with respect to a Collaboration Product are
exclusive even as to Onyx.  

    6.2  GRANT BY WARNER.  Warner hereby grants and agrees to grant to Onyx
exclusive, worldwide (except for Japan) licenses under the Warner Patents solely
to make, have made, use and sell (with the right to sublicense) each compound
designated as an Onyx Lead Compound or as an Onyx Product.  Such licenses with
respect to an Onyx Lead Compound are co-exclusive between Onyx and Warner.  Such
licenses with respect to an Onyx Product are exclusive even as to Warner.

    6.3  ROYALTIES PAYABLE BY WARNER.  In part consideration for all rights
granted to Warner and efforts undertaken by Onyx hereunder, Warner will pay Onyx
[**] of Net Sales as a royalty on worldwide sales (except for Japan) of
Collaboration Products.  If at the time of the first commercial sale of such
Product in such country a Patent exists that is necessary to sell such Product
in such country, or if at any time after such sale a composition of matter
Patent necessary to sell such Collaboration Product issues in such country, such
[**] royalty shall be payable in respect of sales in such country until the
later of (a) the expiration of the last such Patent to expire and (b) the date
such [**] royalty would expire under the provisions of the following sentence
assuming that such Patent 


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did not exist.  Subject to the terms of the preceding sentence, if in a
particular country there is never an issued Patent that is necessary to sell
such Product in such country, then such [**] royalty will be payable, for sales
of such Product in such country, until the earliest of (x) the later to occur of
(i) the [**] anniversary of such first sale in such country and (ii) expiration
of the last Patent necessary to make or use such Product in such country, which
Patent was in existence on the date of such first commercial sale, (y) the first
calendar quarter in which the sale in such country by any one entity (together
with its Affiliates), other than Warner or its Affiliates or licensees, of one
or more products containing the same active ingredient as such Product,
constitutes [**] or more of all units sold in such country containing such
active ingredient and (z) the first calendar quarter in which the sale in such
country by any entities (taken in the aggregate), other than Warner or its
Affiliates or licensees, of one or more products containing the same active
ingredient as the Product, constitutes [**] or more of all units sold in such
country containing such active ingredient (the period from first commercial sale
in each country until the earlier of (x), (y) and (z) above is referred to
herein as the "Collaboration Product Exclusive Period").  In the case of (y) and
(z) above, the [**] royalty will terminate as to Net Sales of Product sold on or
after the day following the end of the triggering calendar quarter.  Warner will
pay Onyx [**] and [**] of Net Sales as a royalty on sales of Collaboration
Products in each country (except for Japan) for the [**], respectively,
following (a) such final Patent expiration (in the event that the required
Patent necessary to sell such Product in such country existed on the date of
first commercial sale or issued thereafter) or (b) the end of the Collaboration
Product Exclusive Period (if no such Patent existed or issued thereafter, and
provided that the Collaboration Product Exclusive Period lasted at least [**]
years); provided, however, that no such royalty will be payable in respect of
Collaboration Products sold without the use of one or more trademarks developed
by Warner for such Product during the time that the [**] royalty was applicable.

    6.4  ROYALTIES PAYABLE BY ONYX.  Onyx will pay Warner [**] of Net Sales as
a royalty on worldwide sales (except for Japan) of Onyx Products.  If at the
time of the first commercial sale of such Product in such country a Patent
exists that is necessary to sell such Product in such country, or if at any time
after such sale a composition of matter Patent necessary to sell such
Collaboration Product issues in such country, such [**] royalty shall be payable
in respect of sales in such country until the later of (a) the expiration of the
last such Patent to expire and (b) the date such [**] royalty would expire under
the provisions of the following sentence assuming that such Patent did not
exist.  Subject to the terms of the preceding sentence, if in a particular
country there is never an issued Patent that is necessary to sell such Product
in such country, then such [**] royalty will be payable, for sales of such
Product in such country, until the earliest of (x) the later to occur of (i) the
[**] anniversary of such first sale in such country and (ii) expiration of the
last Patent necessary to make or use such Product in such country, which Patent
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in existence on the date of such first commercial sale, (y) the first calendar
quarter in which the sale in such country by any one entity (together with its
Affiliates), other than Warner or its Affiliates or licensees, of one or more
products containing the same active ingredient as the Product, constitutes [**]
or more of all units sold in such country containing such active ingredient and
(z) the first calendar quarter in which the sale in such country by any entities
(taken in the aggregate), other than Onyx or its Affiliates or licensees, of one
or more products containing the same active ingredient as the Product,
constitutes [**] or more of all units sold in such country containing such
active ingredient (the period from first commercial sale in each country until
the earliest of (x), (y) and (z) above is referred to herein as the "Onyx
Product Exclusive Period").  In the case of (y) and (z) above, the [**] royalty
will terminate as to Net Sales of Product sold on or after the day following the
end of the triggering calendar quarter.  Onyx will pay Warner [**] of Net Sales
as a royalty on sales of Onyx Products in each country (except for Japan) for
the [**], respectively, following (a) such final Patent expiration (in the event
that the required Patent necessary to sell such Product in such country existed
on the date of first commercial sale or issued thereafter) or (b) the end of the
Onyx Product Exclusive Period (if no such Patent existed or issued thereafter,
and provided that the Onyx Product Exclusive Period lasted at least [**] years);
provided, however, that no such royalty will be payable in respect of an Onyx
Product sold without the use of one or more trademarks developed by Onyx for
such Product during the time that the [**] royalty was applicable.  

    6.5  CURRENCY OF PAYMENT.  All payments to be made under this Agreement
shall be made in United States dollars in the United States to a bank account
designated by the party to be paid.  Royalties earned shall first be determined
in the currency of the country in which they are earned and then converted to
its equivalent in United States currency.  Such conversion shall be based on the
average buying rates of exchange for the currencies involved into the currency
of the United States quoted by Citibank (or its successor in interest) in New
York, New York at the close of business on each business day of the quarterly
period in which the royalties were earned.

    6.6  PAYMENT AND REPORTING.  The royalties due under Section 6.3 or Section
6.5 shall be paid quarterly, within 45 days after the close of each calendar
quarter immediately following each quarterly period in which such royalties are
earned, or earlier if practical.  With each such quarterly payment, the payor
shall furnish the payee a royalty statement, setting forth on a
country-by-country basis the total number of units and Net Sales of each
royalty-bearing Product made, used and/or sold hereunder for the quarterly
period for which the royalties are due.  In addition, the payor shall furnish
such a royalty statement on a country-by-country basis for the first quarter
during which payor makes sales of Product for which no royalty payment in
respect of such country is due hereunder, and shall state the basis for such
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hereunder.  The payor shall thereafter have no further obligation to report the
number of units or Net Sales of such Product made, used and/or sold in such
country.

    6.7  RECORDS.  The royalty paying party shall keep accurate books and
accounts of record in connection with the manufacture, use and/or sale by or for
it of the Products hereunder in sufficient detail to permit accurate
determination of all figures necessary for verification of royalty obligations
set forth in this Article 6.  Such records shall be maintained for a period of 3
years from the end of each year in which sales occurred.  The payee, at its
expense, through a certified public accountant, shall have the right to access
such books and records for the sole purpose of verifying the royalty statements;
such access shall be conducted after reasonable prior notice by the payee to the
payor during the payor's ordinary business hours and shall not be more frequent
than once during each calendar year.  Said accountant shall not disclose to the
payee or any other party any information except that which should properly be
contained in a royalty report required under this Agreement.  If such accounting
determines that a party's error resulted in the other party receiving at least
5% less than properly due in respect of any quarter, then the party in error
will reimburse such amount and reimburse the other party for the costs of such
accounting (including the fees and expenses of the certified public accountant).

    6.8  TAXES WITHHELD.  Any income or other tax that one party hereunder, its
Affiliates or sublicensees is required to withhold (the "Withholding Party") and
pay on behalf of the other party hereunder (the "Withheld Party") with respect
to the royalties payable under this Agreement shall be deducted from and offset
against said royalties prior to remittance to the Withheld Party; provided,
however, that in regard to any tax so deducted, the Withholding Party shall give
or cause to be given to the Withheld Party such assistance as may reasonably be
necessary to enable the Withheld Party to claim exemption therefrom or credit
therefor, and in each case shall furnish the Withheld Party proper evidence of
the taxes paid on its behalf.

    6.9  COMPUTATION OF ROYALTIES.  All sales of Onyx Products between Onyx and
any of its Affiliates and sublicensees shall be disregarded for purposes of
computing royalties under this Article 6, but in such instances royalties shall
be payable only upon sales to unlicensed third parties.  Nothing herein
contained shall obligate Onyx to pay Warner more than one royalty on any unit of
an Onyx Product.  All sales of Collaboration Products between Warner and any of
its Affiliates and sublicensees shall be disregarded for purposes of computing
royalties under this Article 6, but in such instances royalties shall be payable
only upon sales to unlicensed third parties.  Nothing herein contained shall
obligate Warner to pay Onyx more than one royalty on any unit of a Collaboration
Product or a Warner Product.

    6.10 LICENSES TO AFFILIATES.  Each party shall, at the other party's
request, sign license and/or royalty agreements directly with the other party's
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sublicensees in those situations where such agreements would not decrease the
amount of royalties which would be owed hereunder.  Such agreements shall
contain the same language as contained herein with appropriate changes in
parties and territory.  No such license and/or royalty agreement will relieve
Warner or Onyx, as the case may be, of its obligations hereunder, and such party
will guarantee the obligations of its Affiliate or sublicensee in any such
agreement.  Royalties received directly from one party's Affiliates and
sublicensees shall be credited towards such party's royalty obligations under
Section 6.3 or 6.5 hereof, as applicable.

    6.11 RESTRICTIONS ON PAYMENT.  The obligation to pay royalties under this
Agreement shall be waived and excused to the extent that statutes, laws, codes
or government regulations in a particular country prevent such royalty payments
by the seller of Products; provided, however, that if legally permissible, the
seller of Products shall pay the royalties owed to the other party hereto by
depositing such amounts in a bank account in such country that has been
designated by the party owed such royalties.

                                      ARTICLE 7

                        CO-PROMOTION OF COLLABORATION PRODUCTS

    7.1  CO-PROMOTION RIGHTS.  Onyx will have the right to co-promote each
Collaboration Product in the Co-Promotion Country during the Term of
Co-Promotion pursuant to the terms and conditions hereof.

    7.2  ELECTION OR REVOCATION OF CO-PROMOTION RIGHT.  Warner will give Onyx
at least [**] prior written notice of the anticipated first commercial sale of a
Collaboration Product in the Co-Promotion Country.  Onyx will notify Warner in
writing at least [**] prior to such anticipated first commercial sale whether it
elects to exercise its right to co-promote such Collaboration Product in such
Co-Promotion Country beginning with the date of first commercial sale.  If Onyx
fails timely to give such notice to Warner, it shall be deemed to have waived
its rights to co-promote.  Onyx may terminate the Term of Co-Promotion at any
time following [**] month's written notice to Warner.  The Term of Co-Promotion
can not be reinstated after delivery of such notice.  

    7.3  ONYX'S PROMOTIONAL PERCENTAGE.  If Onyx elects to exercise its
co-promotion rights pursuant to Section 7.2, the Marketing Committee will meet
and determine procedures whereby Onyx will supply up to [**], but not less than
[**], of the sales efforts (including details, if determined to be an
appropriate sales activity) for the relevant Collaboration Product in the
Co-Promotion Country.  Warner will compensate Onyx for such effort at the lesser
of (i) [**] and (ii) [**]


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Prior to initiation of the Term of Co-Promotion in the Co-Promotion Country, 
the parties will negotiate in good faith and agree on appropriate accounting 
procedures and payment terms to (i) confirm each party's performance of its 
required sales effort, (ii) calculate the costs for each party to provide its 
sales effort and (iii) compensate Onyx as required by this Section.

    7.4  MARKETING AND MARKETING PLANS.  Each Collaboration Product will be
marketed with one label and will bear one or more trademarks owned by Warner. 
The Marketing Committee will be responsible for developing and approving
marketing plans and the advertising and other promotional materials to be used
in co-promoting each Collaboration Product.  Warner will be responsible for
obtaining acceptance of each Collaboration Product on formularies, if
applicable.  Warner will keep Onyx informed of and will solicit and consider in
good faith Onyx's opinions regarding strategies for obtaining formulary
acceptance.  

    7.5  PROMOTIONAL MATERIALS.  Onyx shall not create any promotional or
advertising materials for Collaboration Products.  Onyx shall disseminate only
those promotional and advertising materials which have been provided or approved
for Onyx's use by Warner.  Warner shall supply timely to Onyx, at Warner's cost,
quantities of promotional materials needed by Onyx to exercise its rights under
this Agreement.  Onyx shall not, and shall cause its employees, representatives
and agents not, to make any claims or representations in respect of the
Collaboration Products that have not been approved by Warner.

    7.6  NO DELEGATION.  Onyx may use only its own employees or the employees
of one or more of its subsidiaries in the course of exercising its co-promotion
rights under this Agreement.

    7.7  RETURNS.  Warner shall be responsible for handling all returns
relating to Collaboration Products.  Any Collaboration Product returned to Onyx
shall be shipped by Onyx to the address designated by Warner with shipping costs
authorized by Warner to be paid by Warner.

    7.8  ORDERS.  All customer orders for Collaboration Products shall be
received and executed by Warner.  Onyx shall transmit any such orders that it
receives to Warner no later than the following business day.

    7.9  SAMPLES.  Each of the parties will keep accurate records as to the
distribution of samples of Collaboration Products and comply with all applicable
laws, rules and regulations dealing with the distribution of samples.




                                         19.
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    7.10 COMPLETION OF SALES.  All sales of Collaboration Products will be
completed, distributed, accounted for, billed and booked by Warner at prices
established by Warner.

    7.11 TRAINING.  Consistent with the marketing plans established by the
Marketing Committee, but not less than [**] prior to the commencement of the
Term of Co-Promotion for each Collaboration Product, Warner shall provide, at
Onyx's expense, reasonable access to its sales training staff and facilities for
appropriate, initial training of the Onyx sales force.  

    7.12 EXCHANGE OF MARKETING INFORMATION.  From time-to-time the Marketing
Committee will develop call lists, schedules, and other appropriate information
for the purpose of determining the physicians and other persons involved in the
drug purchase decision-making process to whom Onyx and Warner, respectively, may
detail each Collaboration Product.  The parties agree to cooperate in finding an
inexpensive and expeditious way to provide a call list and other information
indicating the identity of those physicians and other persons involved in the
decision-making process regarding the purchase of pharmaceuticals.  

                                      ARTICLE 8

                                         FDA

    8.1  SIDE EFFECTS.  Each party shall promptly advise the other by telefax
or overnight delivery service addressed to the attention of its Vice President,
Medical Affairs (or, in Onyx's case, the party with similar responsibilities),
of any unexpected side effect, adverse reaction or injury which has been brought
to that party's attention at any place and which is alleged to have been caused
by a Collaboration Product.  Warner shall have all rights and responsibility to
report such side effect, adverse reaction or injury to regulatory authorities
and others as appropriate.

    8.2  REGULATORY AND OTHER INQUIRIES.  Upon being contacted by the FDA or
any drug regulatory agency for any regulatory purpose pertaining to this
Agreement or to a Collaboration Product, Onyx and Warner shall immediately
notify and consult with one another and Warner shall provide a response as it
deems appropriate.  Warner shall have sole responsibility for responding to all
inquiries to Warner or Onyx regarding the benefits, side effects and other
characteristics of Collaboration Products.  

    8.3  PRODUCT RECALL.  In the event that Warner or Onyx determines that an
event, incident or circumstance has occurred which may result in the need for a
recall or other removal of any Collaboration Product or any lot or lots thereof
from the market, it shall advise and consult with the other party with respect
thereto.  Warner shall make the 


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final determination to recall or otherwise remove the Collaboration Product or
any lot or lots thereof from the market and shall be responsible for the cost
and expense of notifying customers and the cost and expense associated with
return of the recalled Collaboration Product from a customer.  Onyx shall have
no such rights or responsibilities in respect of territories outside of the
Co-Promotion Country.

    8.4  RESPONSIBILITY IF NOT CO-PROMOTING.  Onyx will have the rights and
responsibilities referred to in this Article 8 only during the Term of
Co-Promotion and for [**] thereafter.

                                      ARTICLE 9

                           RESEARCH FUNDING AND MILESTONES

    9.1  RESEARCH FUNDING.  Warner will pay Onyx the following amounts on the
following dates during the Term of the Research Collaboration in consideration
for work performed by Onyx prior to the Effective Date and to provide support
for Onyx's work under the Research Plan:

       The Effective Date....................................... [ ** ]
       Three month anniversary of the Effective Date............ [ ** ]
       Six month anniversary of the Effective Date.............. [ ** ]
       Nine month anniversary of the Effective Date............. [ ** ]
       Twelve month anniversary of the Effective Date........... [ ** ]
       Fifteen month anniversary of the Effective Date.......... [ ** ]
       Eighteen month anniversary of the Effective Date......... [ ** ]
       Twenty-one month anniversary of the Effective Date....... [ ** ]
       Twenty-four month anniversary of the Effective Date...... [ ** ]
       Twenty-seven month anniversary of the Effective Date..... [ ** ]
       Thirty month anniversary of the Effective Date........... [ ** ]
       Thirty-three month anniversary of the Effective Date..... [ ** ]
                                                                -------
                                                                 [ ** ]

    9.2  MILESTONES.  (a)  Warner will pay Onyx the following amounts with
respect to the first Collaboration Product to achieve each stated milestone:

       Commencement of Phase I clinical trials by or on
       behalf of Warner anywhere in the world................... [ ** ]

       Commencement of Phase II clinical trials by or on
       behalf of Warner anywhere in the world................... [ ** ]


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       Commencement of Phase III clinical trials by or on
       behalf of Warner anywhere in the world................... [ ** ]

       The FDA's acceptance for filing of an NDA................ [ ** ]

       Acceptance for filing of an MAA applicable to any of
       the following countries: (i) United Kingdom, (ii) Spain,
       (iii) Italy, (iv) France and (v) Germany (each a 
       "Major European Country")................................ [ ** ]
                                                                country, up to
                                                                [ ** ] total  

       Approval by the FDA of an NDA............................ [ ** ]

       Approval of an MAA applicable to a Major European 
       Country.................................................. [ ** ]        
                                                                country, up to 
                                                                [ ** ] total   

         (b)  Warner will pay Onyx [**] upon the approval by the FDA of an NDA
for the second and each subsequent Collaboration Product so approved and [**]
upon the approval of an MAA applicable to each Major European Country, up to
[**], for the second and each subsequent Collaboration Product so approved.

         (c)  Onyx will pay Warner [**] upon the approval by the FDA of an NDA
for each Onyx Product and [**] upon the approval of an MAA applicable to each
Major European Country, up to [**], for each Onyx Product.

                                      ARTICLE 10

                                   CONFIDENTIALITY

    10.1 CONFIDENTIALITY.  (a) Except as specifically permitted hereunder, each
party hereby agrees to hold in confidence and not use on behalf of itself or
others all data, samples, technical and economic information (including the
economic terms hereof), commercialization, clinical and research strategies and
know-how provided by the other party (the "Disclosing Party") during the Term of
this Agreement and all data, results and information developed pursuant to the
Collaboration and solely owned by the other party (collectively the
"Confidential Information"), except that the term "Confidential Information"
shall not include:


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              (i)  information that is or becomes part of the public domain
through no fault of the non-Disclosing Party or its Affiliates;

              (ii) information that is obtained after the date hereof by the
non-Disclosing Party or one of its Affiliates from any third party which is
lawfully in possession of such Confidential Information and not in violation of
any contractual or legal obligation to the Disclosing Party with respect to such
Confidential Information;

              (iii)     Information that is known to the non-Disclosing Party
or one or more of its Affiliates prior to disclosure by the Disclosing Party, as
evidenced by the non-Disclosing Party's written records; and

              (iv) information that is necessary to be disclosed to any
governmental authorities or pursuant to any regulatory filings, provided that in
such case the non-Disclosing Party notifies the Disclosing Party reasonably in
advance of such disclosure and cooperates with the Disclosing Party to minimize
the scope or content of such disclosure.

         (b)  The obligations of this Section 10.1 shall survive the expiration
or termination of this Agreement.

    10.2 PUBLICITY.  All publicity, press releases and other announcements
relating to this Agreement or the transactions contemplated hereby shall be
reviewed in advance by, and subject to the approval of, both parties; provided,
however, that either party may (i) publicize the existence and general subject
matter of this Agreement without the other party's approval and (ii) disclose
the terms of this Agreement insofar as required to comply with applicable
securities laws, provided that in the case of such securities disclosures the
disclosing party notifies the other party reasonably in advance of such
disclosure and cooperates to minimize the scope and content of such disclosure.

    10.3 PUBLICATION.   The parties shall cooperate in appropriate publication
of the results of research and development work performed pursuant to this
Agreement, but subject to the predominating interest to obtain patent protection
for any patentable subject matter.  To this end, it is agreed that prior to any
public disclosure, the party proposing disclosure shall send the other party a
copy of the information to be disclosed, and shall allow the other party [**]
from the date of receipt in which to determine whether the information to be
disclosed contains subject matter for which patent protection should be sought
prior to disclosure.  If notification is not received during the [**] period,
the party proposing disclosure shall be free to proceed with the disclosure.  If
due to a valid business reason or a belief by the nondisclosing party that the
disclosure contains subject matter for which a patentable invention should be
sought, then prior to the expiration of the [**] period, the nondisclosing party
shall so notify the disclosing party, who shall 


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then delay public disclosure of the information for an additional period of up
to [**] to permit the preparation and filing of a patent application on the
subject matter to be disclosed or other action to be taken.  The party proposing
disclosure shall thereafter be free to publish or disclose the information.  The
determination of authorship for any paper shall be in accordance with accepted
scientific practice.  In no event may any publication or other disclosure
contain a party's Confidential Information without such party's prior written
consent.

                                      ARTICLE 11

                                        JAPAN

    11.1 JAPANESE COMPANY.  Neither party may license any of its Patents or
Know-How to, or otherwise collaborate in the Field with, any person or other
entity for use in Japan, except pursuant to an agreement mutually acceptable to
Onyx and Warner (the "Japanese Company Agreement").  Onyx and Warner will work
together to select a Japanese company to collaborate with (the "Japanese
Company") and to hold negotiations with the Japanese Company regarding the terms
of the Japanese Company Agreement.

    11.2 JAPANESE COMPANY AGREEMENT.  Warner agrees that it will accept any
proposed Japanese Company Agreement that includes the following provisions:  (i)
[**]; provided, however, that [**], (ii) [**], (iii) [**], (iv) [**], (v) [**],
(vi) [**]; provided, however, that this provision shall not apply to (a) any 


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compound identified by the Japanese Company as a candidate for cGLP/cGMP studies
before the effective date of the Japanese Company Agreement, or analogs or
derivatives thereof not identified pursuant to any collaboration between Onyx
and the Japanese Company or (b) any compound identified after the [**]
anniversary of the term of the research collaboration under such agreement; and
further provided that this provision will apply to compounds identified during
the term of the research collaboration under such agreement or [**] thereafter,
and any derivatives or analogs of such compounds whenever identified, and (vii)
[**].  For purposes of clause (i) of this section, any dispute about the [**]
that cannot be resolved by good faith negotiations between senior executive
officers of Onyx and Warner will be resolved by the decision of an investment
bank familiar with valuations of privately-held biotechnology companies selected
by the parties in good faith agreement, with the cost of performing such
valuation borne equally by the parties.

    11.3 ABSENCE OF AGREEMENT.  If Onyx does not execute an agreement in the
Field with a Japanese company pursuant to Sections 11.1 or 11.2, then neither
party shall market or license others to market any Collaboration Compounds in
the Field in Japan without the consent of the other party.

                                      ARTICLE 12

                            REPRESENTATIONS AND WARRANTIES

    12.1 LEGAL AUTHORITY.  Each party represents and warrants to the other that
it has the legal power, authority and right to enter into this Agreement and to
perform its respective obligations set forth herein.

    12.2 NO CONFLICTS.  Each party represents and warrants that as of the date
of this Agreement it is not a party to any agreement or arrangement with any
third party or under any obligation or restriction, including pursuant to its
Certificate of Incorporation or By-Laws, which in any way limits or conflicts
with its ability to fulfill any of its obligations under this Agreement.

    12.3 OTHERS BOUND.  Each party represents and warrants that anyone
performing services under this Agreement on its behalf shall be bound by all of
the conditions of this Agreement, to the extent necessary to give full effect to
this Agreement.


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    12.4 THIRD PARTY RIGHTS.  Each party represents and warrants that to the
best of its knowledge its performance of the work under the Collaboration as
contemplated by this Agreement will not infringe the patent, trade secret or
other proprietary rights of any third party except insofar as any infringement
may relate to technology, data or information provided by the other party
hereunder.

    12.5 SURVIVAL.  The foregoing representations and warranties shall survive
the execution, delivery and performance of this Agreement, notwithstanding any
investigation by or on behalf of either party.

    12.6 DISCLAIMER.  Except as otherwise expressly stated herein, Warner
hereby disclaims any warranty expressed or implied as to any Onyx Product sold
or placed in commerce by or on behalf of Onyx.  Except as otherwise expressly
stated herein, Onyx hereby disclaims any warranty expressed or implied as to any
Collaboration Product sold or placed in commerce by or on behalf of Warner.

    12.7 EXCLUSIVITY.   Except pursuant to the Japanese Company Agreement,
during the Term of the Research Collaboration and [**] thereafter (i) neither
party will conduct any research or development in the Field except pursuant to
this Agreement, (ii) neither party will license (or otherwise permit access to)
any of its Patents or Know-How for research or development in the Field to (or
otherwise collaborate on research or development in the Field with) any other
person or entity and (iii) Onyx will not license (or otherwise permit access to)
any assay developed by it pursuant to the Collaboration to any other person or
entity.  In respect of (i), above, each party shall have the right to conduct
its own research and development in the Field during [**] following the end of
the Term of the Research Collaboration, provided that all results of such work
discovered during such period (including without limitation compounds and
assays), and analogs and derivatives of compounds identified during such period
whenever identified, are promptly disclosed to the other party and are covered
by the licenses granted under Sections 1.4, 5.1 and 5.2, as applicable.  

                                      ARTICLE 13

                                     TERMINATION

    13.1 TERMINATION FOR BREACH.  In the event of a material breach of the
provisions of this Agreement described below, the breaching party shall have 30
days after receipt of written notice from the non-breaching party to cure such
breach.

         (a)  In the event of an uncured material breach of Article 2, the
non-breaching party may terminate the Term of the Research Collaboration.


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         (b)  In the event of an uncured material breach of Section 6.3 by
Warner in respect of a Collaboration Product, Onyx may (i) terminate the
licenses granted by it pursuant to Section 6.1 in respect of such Product and
(ii) require Warner to grant it an exclusive (even as to Warner), worldwide
license (with the right to sublicense) under the Patents relating to such
Product and owned or controlled by Warner, to the extent necessary to make, use
or sell such Product.

         (c)  In the event of an uncured material breach of Section 6.5 by Onyx
in respect of an Onyx Product, Warner may (i) terminate the licenses granted by
it pursuant to Section 6.2 in respect of such Product and (ii) require Onyx to
grant it an exclusive (even as to Onyx), worldwide license (with the right to
sublicense) under the Patents relating to such Product and owned or controlled
by Onyx, to the extent necessary to make, use or sell such Product.

         (d)  In the event of an uncured material breach by Onyx of any
provision of Article 7, Warner may immediately terminate the Term of
Co-Promotion.

    13.2 EFFECT OF BANKRUPTCY.  If either party files a voluntary petition in
bankruptcy, is adjudicated a bankrupt, makes a general assignment for the
benefit of creditors, admits in writing that it is insolvent or fails to
discharge within 15 days an involuntary petition in bankruptcy filed against it,
then the other party will have 60 days to determine whether or not (a) the Term
of the Research Collaboration shall immediately terminate and/or (b) the Term of
Co-Promotion shall immediately terminate.

    13.3 TERMINATION OF CO-PROMOTION RIGHTS.  Warner may terminate Onyx's right
to co-promote Collaboration Products hereunder if (i) any entity or person in
the pharmaceutical industry directly or indirectly acquires ownership or control
of more than 50% of Onyx's voting capital stock or substantially all of its
assets or (ii) Onyx develops or acquires a financial interest in any product
that could compete with any Collaboration Product as to which product an NDA has
been filed with or approved by the FDA.

    13.4 REMEDIES.  In the event of any breach of any provision of this
Agreement, in addition to the termination rights set forth herein, each party
shall have all other rights and remedies at law or equity to enforce this
Agreement.

    13.5 VOLUNTARY TERMINATION.  Warner may terminate this Agreement by
providing written notice thereof to Onyx on the eighteen month anniversary of
the Effective Date.  In such event, the Term of this Agreement will
automatically terminate, and Warner's obligation to purchase stock on the second
anniversary of the Effective Date under the Preferred Stock Purchase Agreement
dated the date hereof will also terminate.  Notwithstanding the termination of
the Term of this Agreement, (i) Warner will make all research payments to Onyx
that are due before the second anniversary of the 


                                         27.
<PAGE>

Effective Date pursuant to Section 9.1 (payable on the dates that such payments
are due) and shall make a termination payment of [**] on the second anniversary
of the Effective Date, (ii) Warner will grant Onyx an exclusive (even as to
Warner), world-wide, fully-paid, perpetual license under Warner's Patents and
Warner's Know-How discovered or reduced to practice prior to the [**]
anniversary of the termination of the Term of this Agreement that are necessary
to make, use and sell any Collaboration Compound for therapeutic or diagnostic
use in the Field, (iii) the licenses granted under Section 6.1 will terminate
and (iv) the licenses granted to Warner under Section 2.4 will terminate.

                                      ARTICLE 14

                                  GENERAL PROVISIONS

    14.1 INDEMNIFICATION.  Each of Warner and Onyx agrees to indemnify and hold
harmless the other party and its Affiliates and their respective employees,
agents, officers, directors and permitted assigns (such party's "Indemnified
Group") from and against any claims, judgments, expenses (including reasonable
attorney's fees), damages and awards (collectively a "Claim") arising out of or
resulting from (i) its negligence or misconduct in regard to any Product, (ii) a
breach of any of its representations or warranties hereunder or (iii) the
manufacture, use or sale of a Collaboration Product (in the case of Warner) or
an Onyx Product (in the case of Onyx), except to the extent that such Claim
arises out of or results from the negligence or misconduct of a party seeking to
be indemnified and held harmless or the negligence or misconduct of a member of
such party's Indemnified Group.  A condition of this obligation is that,
whenever an indemnified party has information from which it may reasonably
conclude an incident has occurred which could give rise to a Claim, such
indemnified party shall immediately give notice to the indemnifying party of all
pertinent data surrounding such incident and, in the event claim is made or suit
is brought, all indemnified parties shall assist the indemnifying party and
cooperate in the gathering of information with respect to the time, place and
circumstances and in obtaining the names and addresses of any injured parties
and available witnesses.  No indemnified party shall, except at its own cost,
voluntarily make any payment or incur any expense in connection with any such
Claim or suit without the prior written consent of the indemnifying party.  The
obligations set forth in this Section shall survive the expiration or
termination of this Agreement.

    14.2 ASSIGNMENT.  This Agreement shall not be assignable by either party
without the prior written consent of the other party, such consent not to be
unreasonably withheld.  In no event will any assignment relieve the assigning
party of its obligations hereunder.  This Agreement shall be binding upon and,
subject to the terms of the foregoing sentence, inure to the benefit of the
parties' successors, legal representatives and assigns.  Notwithstanding the
foregoing, Warner may assign this Agreement to any of its wholly-owned
subsidiaries or any entity succeeding to a majority of its Parke-Davis 


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business, and either party may assign this Agreement to its successor in
connection with any merger, consolidation or sale of all or substantially all of
its assets.

    14.3 NON-WAIVER.  The waiver by either of the parties of any breach of any
provision hereof by the other party shall not be construed to be a waiver of any
succeeding breach of such provision or a waiver of the provision itself.

    14.4 RESEARCH DISPUTE RESOLUTION.  The parties recognize that the
collaborative research program under the Research Plan may require the
resolution of certain issues or the negotiation of additional agreements in the
future.  In the event the Research Management Committee is unable to resolve a
dispute under the Research Plan, either party may have the dispute referred to
the President of Onyx and the senior officer of Warner's pharmaceutical business
for good faith resolution.  

    14.5 GOVERNING LAW.  This Agreement shall be construed and interpreted in
accordance with the laws of the State of New York, other than those provisions
governing conflicts of law.

    14.6 PARTIAL INVALIDITY.  If and to the extent that any court or tribunal
of competent jurisdiction holds any of the terms or provisions of this
Agreement, or the application thereof to any circumstances, to be invalid or
unenforceable in a final nonappealable order, the parties shall use their best
efforts to reform the portions of this Agreement declared invalid to realize the
intent of the parties as fully as practical, and the remainder of this Agreement
and the application of such invalid term or provision to circumstances other
than those as to which it is held invalid or unenforceable shall not be affected
thereby, and each of the remaining terms and provisions of this Agreement shall
remain valid and enforceable to the fullest extent of the law.

    14.7 NOTICE.  Any notice to be given to a party under or in connection with
this Agreement shall be in writing and shall be (i) personally delivered, (ii)
delivered by a nationally recognized overnight courier or (iii) delivered by
certified mail, postage prepaid, return receipt requested to the party at the
address set forth below for such party:

     To Warner:                          To Onyx:
                                         
     Senior Vice President, Research     Hollings Renton
     Parke-Davis Pharmaceutical          President & CEO
       Research Division,                Onyx Corporation
     Warner-Lambert Company              3031 Research Drive
     2800 Plymouth Road                  Building A
     Ann Arbor, MI  48105                Richmond, CA  94806


                                         29.
<PAGE>

     with a copy to:                     with a copy to:
                                         
     President, Parke-Davis              Robert L. Jones, Esq.
     United States and Mexico            Cooley Godward LLP
     Warner-Lambert Company              5 Palo Alto Square
     201 Tabor Road                      4th Floor
     Morris Plains, NJ  07950            Palo Alto, CA  94306

     and a copy to:                      
     
     Vice President and General Counsel
     Warner-Lambert Company
     201 Tabor Road
     Morris Plains, NJ  07950

or to such other address as to which the party has given notice thereof.  Such
notices shall be deemed given upon receipt.

    14.8 VACCINES AND DIAGNOSTICS.  Pursuant to an Agreement, between Chiron
Corporation ("Chiron") and Onyx, dated April 24, 1992, Chiron has certain rights
to Vaccines and Diagnostics developed by Onyx.  Warner and Onyx agree that,
notwithstanding any other term or provision of this Agreement to the contrary,
neither party shall license to the other any Patents or Know-How to make, use or
sell Vaccines or Diagnostics.  Furthermore, each party hereto may make, use or
sell Vaccines and Diagnostics in the Field without obligation to the other
party, including as relates to payment of milestones and royalties.  As used in
this Section, (i) "Vaccines" shall mean [**] and (ii) "Diagnostics" shall mean
[**].

    14.9 HEADINGS.  The headings appearing herein have been inserted solely for
the convenience of the parties hereto and shall not affect the construction,
meaning or interpretation of this Agreement or any of its terms and conditions.

    14.10 NO IMPLIED LICENSES OR WARRANTIES.  No right or license under any
patent application, issued patent, know-how or other proprietary information is
granted or shall be granted by implication.  All such rights or licenses are or
shall be granted only as 



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expressly provided in the terms of this Agreement.  Neither party warrants the
success of any clinical or other studies undertaken by it.

    14.11     FORCE MAJEURE.  No failure or omission by the parties hereto in
the performance of any obligation of this Agreement shall be deemed a breach of
this Agreement nor shall it create any liability if the same shall arise from
any cause or causes beyond the reasonable control of the affected party,
including, but not limited to, the following, which for purposes of this
Agreement shall be regarded as beyond the control of the party in question: acts
of nature; acts or omissions of any government; any rules, regulations, or
orders issued by any governmental authority or by any officer, department,
agency or instrumentality thereof; fire; storm; flood; earthquake; accident;
war; rebellion; insurrection; riot; invasion; strikes; and lockouts or the like;
provided that the party so affected shall use its best efforts to avoid or
remove such causes or nonperformance and shall continue performance hereunder
with the utmost dispatch whenever such causes are removed.

    14.12     SURVIVAL.  The representations and warranties contained in this
Agreement as well as those rights and/or obligations contained in the terms of
this Agreement which by their intent or meaning have validity beyond the term of
this Agreement shall survive the termination or expiration of this Agreement.

    14.13     ENTIRE AGREEMENT.  This Agreement constitutes the entire
understanding between the parties with respect to the subject matter contained
herein and supersedes any and all prior agreements, understandings and
arrangements whether oral or written between the parties relating to the subject
matter hereof.  This Agreement will control in the event of any conflict between
this Agreement and the Research Plan.

    14.14     AMENDMENTS.  No amendment, change, modification or alteration of
the terms and conditions of this Agreement shall be binding upon either party
unless in writing and signed by the party to be charged.

    14.15     INDEPENDENT CONTRACTORS.  It is understood that both parties
hereto are independent contractors and engage in the operation of their own
respective businesses, and neither party hereto is to be considered the agent or
partner of the other party for any purpose whatsoever.  Neither party has any
authority to enter into any contracts or assume any obligations for the other
party or make any warranties or representations on behalf of the other party.

    14.16     COUNTERPARTS.  This Agreement may be executed in counterparts,
each of which shall be deemed an original and both of which together shall
constitute one and the same instrument.


                                         31.
<PAGE>

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


ONYX PHARMACEUTICALS, INC.             WARNER-LAMBERT COMPANY



By: /s/ Hollings C. Renton             By: /s/ Ronald M. Cresswell
   --------------------------------       --------------------------------

Name: Hollings C. Renton               Name: Ronald M. Cresswell
     ------------------------------         ------------------------------
Title: President & CEO                 Title: Vice President and Chairman
      -----------------------------           Parke-Davis Pharmaceutical
                                              Research 
                                              Warner-Lambert Company
                                             -----------------------------



                                         32.
<PAGE>


                                      SCHEDULE 1
                                           
                       PRE-EXISTING CONFIDENTIALITY OBLIGATIONS
                                           




<PAGE>





                         RESEARCH, DEVELOPMENT AND MARKETING
                               COLLABORATION AGREEMENT

                              DATED AS OF JULY 31, 1997

                                       BETWEEN

                              ONYX PHARMACEUTICALS, INC.

                                         AND

                                WARNER-LAMBERT COMPANY





<PAGE>

                                  TABLE OF CONTENTS

                                                                       PAGE

ARTICLE 1.         DEFINITIONS . . . . . . . . . . . . . . . . . . . . . 1

ARTICLE 2.         RESEARCH PROGRAM. . . . . . . . . . . . . . . . . . . 6

    2.1       Undertaking and Scope. . . . . . . . . . . . . . . . . . . 6
    2.2       Personnel and Resources. . . . . . . . . . . . . . . . . . 7
    2.3       Research Term. . . . . . . . . . . . . . . . . . . . . . . 7
    2.4       Rights to Know-How and Patents for Research. . . . . . . . 7
    2.5       Collaboration Expenses.. . . . . . . . . . . . . . . . . . 8

ARTICLE 3.         COMMITTEES. . . . . . . . . . . . . . . . . . . . . . 8

    3.1       Research Management Committee. . . . . . . . . . . . . . . 8
    3.2       Meetings.. . . . . . . . . . . . . . . . . . . . . . . . . 8
    3.3       SAB Attendance.. . . . . . . . . . . . . . . . . . . . . . 8

ARTICLE 4.         PATENTS, KNOW-HOW, RIGHTS AND INVENTIONS. . . . . . . 9

    4.1       Rights to Inventions.. . . . . . . . . . . . . . . . . . . 9
    4.2       Joint Inventions.. . . . . . . . . . . . . . . . . . . . . 9
    4.3       Protection of Patent Rights. . . . . . . . . . . . . . . .10
    4.4       Allegations of Infringement by Third Parties.. . . . . . .10

ARTICLE 5.         DESIGNATION OF LEAD COMPOUNDS AND MARKETING RIGHTS. .11

    5.1       Designation of Lead Compound.. . . . . . . . . . . . . . .11
    5.2       Collaboration Product. . . . . . . . . . . . . . . . . . .11
    5.3       Independent Development. . . . . . . . . . . . . . . . . .12
    5.4       Warner's Re-engagement Option. . . . . . . . . . . . . . .12

ARTICLE 6.         LICENSES AND ROYALTIES. . . . . . . . . . . . . . . .13

    6.1       Grant by Onyx. . . . . . . . . . . . . . . . . . . . . . .13
    6.2       Grant by Warner. . . . . . . . . . . . . . . . . . . . . .13
    6.3       Royalties Payable by Warner. . . . . . . . . . . . . . . .13
    6.4       Duration of Warner Royalty Obligation. . . . . . . . . . .14
    6.5       Royalties Payable by Onyx. . . . . . . . . . . . . . . . .14
    6.6       Duration of Onyx Royalty Obligation. . . . . . . . . . . .15
    6.7       Third-Party Royalties. . . . . . . . . . . . . . . . . . .15
    6.8       Currency of Payment. . . . . . . . . . . . . . . . . . . .16
    6.9       Payment and Reporting. . . . . . . . . . . . . . . . . . .16
    6.10      Records. . . . . . . . . . . . . . . . . . . . . . . . . .16
    6.11      Taxes Withheld.. . . . . . . . . . . . . . . . . . . . . .17


                                          i.
<PAGE>


                                  TABLE OF CONTENTS
                                     (CONTINUED)

                                                                       PAGE

    6.12      Computation of Royalties.. . . . . . . . . . . . . . . . .17
    6.13      Licenses to Affiliates.. . . . . . . . . . . . . . . . . .17
    6.14      Restrictions on Payment. . . . . . . . . . . . . . . . . .17

ARTICLE 7.         FDA . . . . . . . . . . . . . . . . . . . . . . . . .18

    7.1       Side Effects.. . . . . . . . . . . . . . . . . . . . . . .18
    7.2       Product Recall.. . . . . . . . . . . . . . . . . . . . . .18

ARTICLE 8.         RESEARCH FUNDING FEES AND MILESTONES. . . . . . . . .18

    8.1       License Fees.. . . . . . . . . . . . . . . . . . . . . . .18
    8.2       Research Funding.. . . . . . . . . . . . . . . . . . . . .18
    8.3       Milestones.. . . . . . . . . . . . . . . . . . . . . . . .19

ARTICLE 9.         CONFIDENTIALITY . . . . . . . . . . . . . . . . . . .20

    9.1       Confidentiality. . . . . . . . . . . . . . . . . . . . . .20
    9.2       Publicity. . . . . . . . . . . . . . . . . . . . . . . . .21
    9.3       Publication. . . . . . . . . . . . . . . . . . . . . . . .21

ARTICLE 10.        REPRESENTATIONS AND WARRANTIES. . . . . . . . . . . .21

    10.1      Legal Authority. . . . . . . . . . . . . . . . . . . . . .21
    10.2      No Conflicts.. . . . . . . . . . . . . . . . . . . . . . .22
    10.3      Others Bound.. . . . . . . . . . . . . . . . . . . . . . .22
    10.4      Third Party Rights.. . . . . . . . . . . . . . . . . . . .22
    10.5      Survival.. . . . . . . . . . . . . . . . . . . . . . . . .22
    10.6      Disclaimer.. . . . . . . . . . . . . . . . . . . . . . . .22
    10.7      Exclusivity. . . . . . . . . . . . . . . . . . . . . . . .22

Article 11.        TERMINATION . . . . . . . . . . . . . . . . . . . . .23

    11.1      Termination for Breach . . . . . . . . . . . . . . . . . .23
    11.2      Effect of Bankruptcy . . . . . . . . . . . . . . . . . . .23
    13.3      Key Personnel. . . . . . . . . . . . . . . . . . . . . . .23
    11.3      Remedies . . . . . . . . . . . . . . . . . . . . . . . . .24
    11.4      Voluntary Termination. . . . . . . . . . . . . . . . . . .24

ARTICLE 12.        GENERAL PROVISIONS. . . . . . . . . . . . . . . . . .24

    12.1      Indemnification. . . . . . . . . . . . . . . . . . . . . .24
    12.2      Assignment . . . . . . . . . . . . . . . . . . . . . . . .25
    12.3      Non-Waiver . . . . . . . . . . . . . . . . . . . . . . . .25


                                         ii.
<PAGE>

                                  TABLE OF CONTENTS
                                     (CONTINUED)

                                                                       PAGE

    12.4      Research Dispute Resolution. . . . . . . . . . . . . . . .25
    12.5      Governing Law. . . . . . . . . . . . . . . . . . . . . . .25
    12.6      Partial Invalidity . . . . . . . . . . . . . . . . . . . .25
    12.7      Notice . . . . . . . . . . . . . . . . . . . . . . . . . .26
    12.8      Vaccines and Diagnostics . . . . . . . . . . . . . . . . .26
    12.9      Headings . . . . . . . . . . . . . . . . . . . . . . . . .27
    12.10     No Implied Licenses or Warranties. . . . . . . . . . . . .27
    12.11     Force Majeure. . . . . . . . . . . . . . . . . . . . . . .27
    12.12     Survival . . . . . . . . . . . . . . . . . . . . . . . . .27
    12.13     Entire Agreement . . . . . . . . . . . . . . . . . . . . .27
    12.14     Amendments . . . . . . . . . . . . . . . . . . . . . . . .27
    12.15     Independent Contractors. . . . . . . . . . . . . . . . . .28
    12.16     Counterparts . . . . . . . . . . . . . . . . . . . . . . .28


                                         iii.
<PAGE>


                         RESEARCH, DEVELOPMENT AND MARKETING
                               COLLABORATION AGREEMENT


    THIS RESEARCH, DEVELOPMENT AND MARKETING COLLABORATION AGREEMENT (the
"Agreement") is made and entered into effective as of July 31, 1997, by and
between ONYX PHARMACEUTICALS, INC., a California corporation located at 3031
Research Drive, Richmond, California 94806 ("Onyx"), and WARNER-LAMBERT COMPANY,
a Delaware corporation located at 201 Tabor Road, Morris Plains, New Jersey
07950 ("Warner").

                                 W I T N E S S E T H:

    WHEREAS, Onyx and Warner each has certain expertise in the discovery and
development of agents acting in the field of inflammation; and

    WHEREAS, Warner and Onyx each wish to enter into a collaborative effort to
share such expertise, to develop new expertise in the field of inflammation,
auto immunity and related pathological conditions, to research together
potential applications of such expertise as applied to specific protein targets
to identify potentially useful drug candidates and, if successful, to market
such drugs (the "Collaboration");

    NOW, THEREFORE, in consideration of the foregoing premises and the mutual
promises, covenants and conditions contained herein, Onyx and Warner agree as
follows:

                                      ARTICLE 1

                                     DEFINITIONS

    The following capitalized terms shall have the meanings indicated for
purposes of this Agreement:

    "1995 AGREEMENT" shall mean the Research, Development and Marketing
Collaboration Agreement between Onyx and Warner dated May 2, 1995, as amended.

    "AFFILIATE" shall mean any corporation, association or other entity which
directly or indirectly controls, is controlled by or is under common control
with the party in question.  As used herein the term "control" means possession
of the power to direct, or cause the direction of, the management and policies
of a corporation, association or other entity.

    "COLLABORATION COMPOUND" shall mean any compound identified by either party
during the Research Term (or one year thereafter) as showing sufficient activity
against


                                          1.
<PAGE>

targets in the Field identified by the Research Management Committee in assays
contributed to or developed under the Collaboration such that further research
on such compound for such target is pursued, and any analogs or derivatives of
such compounds whenever identified.

    "COLLABORATION LEAD COMPOUND" shall mean any Collaboration Compound
selected by Warner for further development as provided in Section 5.1.

    "COLLABORATION PRODUCT" shall mean any Collaboration Lead Compound for
which an IND or foreign equivalent application has been filed, as provided in
Section 5.2.

    "COLLABORATION PRODUCT EXCLUSIVE PERIOD" shall have the meaning set forth
in Section 6.4(b).

    "EFFECTIVE DATE" shall mean the date of this Agreement first written above.

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

    "FIELD" shall mean research, drug discovery and development of therapeutic
agents that regulate, treat or prevent inflammation, autoimmunity and/or other
pathological conditions via the agonism, antagonism or other biochemical
interaction with one or more of the following molecular targets: [**], including
[**] and other kinases implicated in septic shock, and Wiscott-Aldrich Syndrome
Protein (WASP).

The parties may agree during the Research Term to expand the Field by
designating additional targets, and it is their intention to do so in the event
logical extensions of the Field are identified and may be accommodated within
the resource commitment of the parties.  Such expansion will be in writing
signed by all members of the Research Development Committee.  However, neither
party shall be obligated to agree to expand the Field.

For the avoidance of doubt, the parties agree that the Field will exclude:

         (a)[**]


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                                          2.
<PAGE>

         (b)  All molecular entities that are part of or that regulate [**].
This also includes [**].  This also includes [**].  This exclusion shall not
include [**].

         (c)  [**] except for the specific biological targets identified
above;

         (d)  [**]

         (e)  [**]

         (f)  [**]

         (g)  [**]

         (h)  [**]

         (i)  [**] and

         (j)  [**].

    [**] shall mean therapeutics where the active agent is [**] specifically
excludes [**].

    "IND" shall mean an Investigational New Drug Application.

    "INVENTION" shall mean any invention, idea, data, know-how or material that
is discovered or reduced to practice during the Term of this Agreement [**] and
that relates to the discovery, design, synthesis, delivery, development,
testing, use, manufacture or sale of agents acting in the Field.

    "KNOW-HOW" shall mean Onyx Know-How and/or Warner Know-How, as the case may
be.

    "MHW" shall mean the Ministry of Health and Welfare of Japan.


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                                          3.
<PAGE>

    "NDA" shall mean a New Drug Application.

    "NET SALES" shall mean the gross amount invoiced by a party hereto or one
of its Affiliates to customers who are not Affiliates of the selling party for
all Products sold to such customers, less the following deductions calculated in
accordance with United States generally accepted accounting principles and
Warner's (or Onyx's, as the case may be) normal internal accounting standards
consistently applied: (i) trade, quantity and cash discounts or rebates; (ii)
credits, rebates, charge-back rebates, reimbursements or similar payments
granted or given to wholesalers and other distributors, buying groups,
healthcare insurance carriers, governmental agencies and other institutions,
provided that such provisions will not grant a preference or otherwise favor
other products of Warner or Onyx, as the case may be, if based on the fact that
a royalty may be payable hereunder; (iii) credits or allowances for rejection or
return of such Product previously sold; (iv) any tax, tariff, duty or other
governmental charge (other than an income tax) levied on the sale,
transportation or delivery of a Product and borne by the seller thereof; (v)
payments or rebates paid in connection with state or federal Medicare, Medicaid
or similar programs; (vi) any charge for freight or insurance; and (vii)
allowance for bad debt expense.  Any such deductions, if not for amounts
actually incurred or allowed with respect to the specific Products sold, shall
be no greater than the pro rata amount allocable to such Product, based on the
invoices for similar pharmaceutical products sold by the selling party, of the
total amount of such deductions allowed or incurred for all such similar
products.  In the event that the selling party recognizes revenue due to excess
balance sheet reserves associated with the net sales deductions described above,
the pro rata amount of such revenue allocable to the Product shall be deemed Net
Sales hereunder, at the time such revenue is recognized.

    "ONYX KNOW-HOW" shall mean all technology, inventions, information, data,
know-how, compounds and materials that (i) are not Onyx Patents, (ii) Onyx owns
or otherwise has the right to license to Warner and (iii) relate to the
discovery, design, synthesis, delivery, development, testing, use, manufacture
or sale of agents with activity in the Field.  Excluded from "Onyx Know-How" are
compounds and information relating to compounds that have been identified by
Onyx as candidates for cGLP/cGMP studies on or before the Effective Date, or are
hereafter so identified without material application of information provided by
Warner or developed by either party pursuant to the Collaboration.

    "ONYX LEAD COMPOUND" shall mean a Collaboration Compound that Onyx obtains
the right to develop independently as provided in Section 5.3.

    "ONYX PATENTS" shall mean all United States and foreign patents that are
owned by Onyx or that Onyx otherwise has the right to license to Warner and that
relate to the discovery, design, synthesis, delivery, development, testing, use,
manufacture or sale of


                                          4.
<PAGE>

agents with activity in the Field, including, without limitation, all reissues,
extensions, substitutions, confirmations, registrations, revalidations,
additions, continuations, continuations-in-part, and divisions thereof.
Excluded from "Onyx Patents" are patents and patent applications that claim
compounds and information relating to compounds that have been identified by
Onyx as candidates for cGLP/cGMP studies on or before the Effective Date, or are
hereafter so identified without material application of information provided by
Warner or developed pursuant to the Collaboration.

    "ONYX PRODUCT" shall have the meaning set forth in Section 5.3.

    "ONYX PRODUCT EXCLUSIVE PERIOD" shall have the meaning set forth in Section
6.6(b).

    "PATENTS" shall mean Onyx Patents and/or Warner Patents, as the case may
be.

    "PRODUCTS" shall mean Collaboration Products and/or Onyx Products, as
applicable.

    "RESEARCH MANAGEMENT COMMITTEE" shall mean that entity organized and acting
pursuant to Section 3.1.

    "RESEARCH PLAN" shall have the meaning set forth in Section 2.1.

    "RESEARCH TERM" shall have the meaning set forth in Section 2.3.

    "TERM OF THIS AGREEMENT" shall mean the period from the Effective Date
until the expiration of all licenses granted pursuant to this Agreement or until
this Agreement is otherwise terminated pursuant to its terms.

    "WARNER KNOW-HOW" shall mean all technology, inventions, information, data,
know-how, compounds and materials that (i) are not Warner Patents, (ii) Warner
owns or otherwise has the right to license to Onyx and (iii) relate to the
discovery, design, synthesis, delivery, development, testing, use, manufacture
or sale of agents with activity in the Field.  Excluded from "Warner Know-How"
are (i) Warner's high-volume screening technology and (ii) compounds and
information relating to compounds that have been identified by Warner as
candidates for cGLP/cGMP studies on or before the Effective Date, or are
hereafter so identified without material application of information provided by
Onyx or developed by either party pursuant to the Collaboration.

    "WARNER PATENTS" shall mean all United States and foreign patents that are
owned by Warner or that Warner otherwise has the right to license to Onyx and
that relate to the discovery, design, synthesis, delivery, development, testing,
use, manufacture or sale of agents with activity in the Field,  including,
without limitation, all reissues, extensions,


                                          5.
<PAGE>

substitutions, confirmations, registrations, revalidations, additions,
continuations, continuations-in-part, and divisions thereof.  Excluded from
"Warner Patents" are patents and patent applications that claim (i) Warner's
high volume screen technology and (ii) compounds and information relating to
compounds that have been identified by Warner as candidates for cGLP/cGMP
studies on or before the Effective Date, or are hereafter so identified without
material application of information provided by Onyx or developed pursuant to
the Collaboration.

                                      ARTICLE 2

                                   RESEARCH PROGRAM

    2.1  UNDERTAKING AND SCOPE.  From time to time the Research Management
Committee will agree on the general direction of the research to be performed
hereunder.  The correspondence and other material documenting such agreement are
collectively referred to herein as the "Research Plan."  Each party agrees to
use its best efforts to perform the activities detailed in the Research Plan, in
a professional and timely manner.  Onyx agrees to use its best efforts at its
cost (including the cost of any royalties or other amounts payable by Onyx to
third parties) to (i) develop and transfer to Warner [**] screening assays per
each year of the Research Term for specific targets in the Field selected by the
Research Management Committee, (ii) supply protein required to run such screens
and (iii) provide for the testing of substantially all of Onyx's compound
library in such screens.  Onyx shall not knowingly provide or perform research
on any compounds the use of which would require a royalty or other payment to
any third party, unless the Research Management Committee agrees that such
compound should be provided and the parties agree in writing how such royalty or
other payment will be paid.  Warner agrees to use its best efforts at its cost
(including the cost of any royalties or other amounts payable by Warner to third
parties) to (i) screen substantially all of its compound library with such
screens provided by Onyx and (ii) conduct medicinal chemistry and animal
pharmacology as the Research Management Committee deems appropriate.  Promptly
after the Effective Date, Onyx and Warner will disclose to each other all
information possessed by it relevant to the Field and necessary or helpful to
perform the work described in the Research Plan.  During the Research Term, or
[**] thereafter, the Research Management Committee and either party individually
may from time to time declare any compound that meets the definition therefor in
Article 1 to be a Collaboration Compound.  Notwithstanding the foregoing,
neither party will be required to offer the other party any compounds or
information relating to compounds that have been identified as candidates for
cGLP/cGMP studies on or before the Effective Date, or are hereafter so
identified without material application of information provided by the other
party or developed pursuant to the Collaboration.  Neither party shall be
required to screen under this Collaboration or to offer to the other party any
information regarding any compounds


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                                          6.
<PAGE>

identified as having activity in pathways expressly excluded from the Field, if
so identified prior to being designated a "Collaboration Compound" hereunder.

    2.2  PERSONNEL AND RESOURCES.  Each party agrees to commit the personnel,
facilities, expertise and other resources needed to perform this Agreement in
accordance with its terms; provided, however, that neither party warrants that
the Collaboration shall achieve any of the research objectives contemplated by
them. During the Research Term, Warner and Onyx will each maintain at its cost
an average of [**] full-time equivalents ("FTEs") devoted to cooperative work
under the Research Plan.  At the beginning of the first-year of the Research
Term, Onyx need maintain [**] such FTEs; with Onyx adding additional FTEs as
needed to reach [**] FTEs actively working on the research by [**].  The
scientific priorities and direction of such staff of both parties will be
determined by the Research Management Committee.  Such staff will include, as
appropriate, scientists in the areas of [**].

    2.3  RESEARCH TERM.  Work under the Research Plan will commence as of the 
date of this Agreement and, unless terminated earlier by either party 
pursuant to the terms of this Agreement or extended by mutual agreement of 
the parties, will terminate on the third anniversary hereafter (as 
terminated, expired or extended, the "Research Term").  At least [**] prior
to the [**] anniversary of the Effective Date, Onyx will provide Warner a 
written research proposal for continuation of the research project beyond 
the initial Research Term.  Promptly after Onyx provides such proposal, the 
Research Management Committee will conduct a formal review of such proposal 
and of the status and success of the parties' work on the Research Plan.  
By the [**] anniversary of the Effective Date (the "Evaluation Date"), 
Warner shall decide in its sole discretion whether to extend the collaborative
research under the research proposal beyond the initial three year term for 
[**], or not to extend the collaborative research beyond such initial term, 
in which case the Agreement shall terminate at the end of such initial three 
year Research Term.  If Warner does not elect in writing to extend the Research 
Term beyond such initial three year term, then commencing on or promptly after 
the Evaluation Date the work conducted by Onyx and Warner will be wound down 
and ended in an orderly [**] phase out period, ending on the [**] anniversary 
of the Evaluation Date, with Onyx continuing the research efforts using [**] 
FTEs over such period.  During such phase-out period, Warner will be obligated 
to pay Onyx a total of [**] to support Onyx's research efforts using [**] FTEs 
over such phase-out period, which amounts shall be paid [**] in advance over 
such [**], commencing on the Evaluation Date, [**].

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                                          7.
<PAGE>

    2.4  RIGHTS TO KNOW-HOW AND PATENTS FOR RESEARCH.  Each party hereby grants
and agrees to grant to the other a non-exclusive, royalty-free license to use
such party's Know-How and Patents that are conceived or reduced to practice
prior to the [**] anniversary of the end of the Research Term for (a) research
and development purposes in the Field and (b), beginning [**] after termination
of the Research Term, research and development outside of the Field; provided,
however, that the granting party may terminate such licenses granted by it
immediately upon its termination of this Agreement for cause.  Notwithstanding
the foregoing, neither party is granted any interest in the other's compounds
(or analogs or derivatives thereof) except as specifically set forth in this
Agreement.  In the event that one party does nonetheless conceive or reduce to
practice any invention that is comprised of the other party's compound (or
analog or derivative thereof) and if such invention is not in the Field, such
party will promptly assign its entire interest therein exclusively to the other
party without charge and will not be entitled to any milestones, royalties or
other consideration in connection therewith.

    2.5  COLLABORATION EXPENSES.  [**] the costs and expenses of work done
pursuant to the Collaboration at [**].

                                      ARTICLE 3

                                      COMMITTEES

    3.1  RESEARCH MANAGEMENT COMMITTEE.  Warner and Onyx will each appoint up
to 4 representatives to a research management committee (the "Research
Management Committee"), which will oversee the operational aspects of performing
the Research Plan.  The Research Management Committee will assure that agendas
and minutes are prepared for each of its meetings.  The personnel, facilities,
expertise and other resources of each party to be used in performance of the
Research Plan shall be established by the Research Management Committee.  The
Research Management Committee will meet quarterly, or more frequently if
mutually agreed.  Warner's and Onyx's initial representatives to the Research
Management Committee will be appointed by each of them promptly after the date
of this Agreement.  All actions taken and decisions made by the Research
Management Committee shall be by unanimous agreement.  A party may change any of
its appointments to the Research Management Committee at any time upon giving
written notice to the other party.

    3.2  MEETINGS.  The Research Management Committee may meet by telephone or
in person at such times as are agreeable to the members of each such committee.
Attendance at meetings shall be at the respective expense of the participating
parties.  Warner and Onyx shall alternate the right to determine the location of
each meeting of the


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                                          8.
<PAGE>

Research Management Committee, with Onyx determining the location of the first
meeting of such committee.

    3.3  SAB ATTENDANCE.  During the Term of this Agreement, Warner will be
entitled to have up to three (3) of its representatives attend all meetings of
Onyx's Scientific Advisory Board that relate directly to the Field and such
other general symposia that do not contain confidential information outside the
Field of Onyx or of any third party to which Onyx owes a duty of confidentiality
that would be breached by Warner's attendance.  Onyx will provide Warner
reasonable advance notice of all such meetings and will provide Warner copies of
all written material given to the members of the Scientific Advisory Board in
connection with such meetings.  Attendance at such meetings by Warner's
representatives will be at Warner's expense.  As a condition of such attendance
and access to such written material, Warner will execute appropriate
confidentiality agreements with respect to information disclosed at such
meetings and in such written material.  The Warner representatives provided for
herein shall not be in addition to the representatives provided for under
Section 2.4 of the 1995 Agreement, though different individuals from Warner may
attend different meetings depending on the subject matter.

                                      ARTICLE 4

                       PATENTS, KNOW-HOW, RIGHTS AND INVENTIONS

    4.1  RIGHTS TO INVENTIONS.

         (a)  Ownership of all Inventions and any other technology,
information, data, know-how, compounds and material developed, discovered or
made hereunder shall be determined in accordance with United States laws of
inventorship.  The owner (the "Inventor") of any Invention shall have the right,
at its option and expense, to prepare, file and prosecute in its own name any
patent applications with respect to any Invention owned by it and to maintain
any patents issued.  In connection therewith, the non-Inventor party agrees to
cooperate with the Inventor at the Inventor's expense in the preparation and
prosecution of all such patent applications and in the maintenance of any
patents issued.  This obligation shall survive the expiration or termination of
this Agreement.

         (b)  The parties will co-own technology, inventions, information,
data, know-how, compounds and materials (whether or not patentable) that relate
to [**] and that are developed in connection with performance of the Research
Plan ("[**] Inventions").  The parties will cooperate in the joint filing of
patent applications claiming [**] Inventions.  The parties will negotiate in
good faith regarding the collaborative commercial exploitation of the [**]
Inventions;


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provided, however, that each party will retain an undivided ownership interest
in the [**] Inventions and will be free to exploit the same without obligation
to the other party.

    4.2  JOINT INVENTIONS.  Inventions that are jointly invented by Onyx and
Warner will be jointly owned by them; however, [**] will have the rights and
responsibilities of the "Inventor" as described in this Article IV in respect of
any such patentable, jointly owned Inventions, and [**] shall have the rights
and responsibilities of a non-Inventor therein.  [**] shall pay all expenses in
connection with its preparation, filing and prosecution of patent applications
that claim patentable, jointly owned Inventions.  [**] shall from time to time
notify [**] of the amount of such expenses, and [**] shall promptly thereafter
pay [**] of its out-of-pocket expenses.  As used in the preceding sentence
"out-of-pocket expenses" shall mean direct costs, excluding internal labor
costs.  Onyx may elect in writing to disclaim all interest in any jointly
invented Invention, in which case (i) such Invention will be solely owned by
Warner, and Onyx will co-operate to assure Warner's sole ownership, (ii) Onyx
will have no further interest in such Invention, by ownership, license or
otherwise and (iii) [**] the date that Warner receives Onyx's written
disclaimer.  Warner may elect in writing to disclaim all interest in any jointly
invented Inventions, in which case (i) such Invention will be solely owned by
Onyx, and Warner will co-operate to assure Onyx's sole ownership, (ii) Warner
will have no further interest in such Invention, by ownership, license or
otherwise and (iii) [**].

    4.3  PROTECTION OF PATENT RIGHTS.

         (a)  The Inventor shall keep the other party currently informed of all
steps to be taken in the preparation, prosecution and maintenance of all of its
patents and patent applications which claim an Invention and shall furnish the
other party with copies of patents and applications, amendments thereto and
other related correspondence relating to such Invention to and from patent
offices and permit the other party to offer its comments thereon before the
Inventor makes a submission to a patent office which could materially affect the
scope or validity of the patent coverage that may result.  The non-Inventor
party shall offer its comments promptly.  Onyx and Warner shall each promptly
notify the other of any infringement and/or unauthorized use of an Invention
which comes to its attention.

         (b)  The non-Inventor party may request in writing that the Inventor
take specific, reasonable actions to (i) prepare, file or prosecute a patent
application with respect to an Invention, (ii) maintain any patents issued with
respect to an Invention, (iii)


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protect against abandonment of a patent or application which claims an Invention
or (iv) obtain a discontinuance of an infringement or unauthorized use of such
patent or application.  If such actions are not undertaken within thirty days of
the Inventor's receipt of such written request and timely pursued thereafter,
the Inventor shall permit, and the non-Inventor party at its option and expense
may undertake, such actions.  The party not undertaking such actions shall fully
cooperate with the other party and shall provide to the other party whatever
assignments and other documents that may be needed in connection therewith.  The
party not undertaking such actions may require a suitable indemnity against all
damages, costs and expenses and impose such other reasonable conditions as such
party's advisors may require.

         (c)  If either party commences any actions or proceedings (legal or
otherwise) pursuant to this Section, it shall prosecute the same vigorously at
its expense and shall not abandon or compromise them or fail to exercise any
rights of appeal without giving the other party the right to take over their
conduct at its own expense.  The party finally conducting legal actions or
proceedings against an alleged infringer or other party shall be entitled to any
damages or costs awarded against such infringer or other party.

    4.4  ALLEGATIONS OF INFRINGEMENT BY THIRD PARTIES.  In the event that
Warner or Onyx receives notice that any action by either of them under this
Agreement is alleged to be a violation of the patent or other intellectual
property rights of a third party, it shall notify the other party to this
Agreement, and they shall jointly determine an appropriate response and course
of action.  The costs of such defense, and any damages, costs or expenses
resulting from such action, shall be paid [**] of all such costs relating to
allegations that it was aware of prior to the Effective Date.  The Research
Management Committee will decide whether or not to continue any activity
following notice that such activity may be a violation of the patent or other
intellectual property rights of a third party.

                                      ARTICLE 5

                  DESIGNATION OF LEAD COMPOUNDS AND MARKETING RIGHTS

    5.1  DESIGNATION OF LEAD COMPOUND.

         (a)  From time to time, Warner may formally designate one or more
Collaboration Compounds for further development, and such designated compounds
shall be deemed Collaboration Lead Compounds.  Such designation shall be made
under Warner's then current standards for declaring one of its own compounds a
"lead


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compound."  Such designation generally indicates that Warner has identified such
compound as a candidate for cGLP/cGMP studies. Warner will pursue the research
and development of each Collaboration Lead Compound at its own expense and under
its sole direction.  Warner will provide Onyx quarterly, written updates
regarding the status of each Collaboration Lead Compound.

         (b)  In the event Warner decides to pursue commercialization of a
Collaboration Product in Japan, [**].  If [**], and if [**], then it shall [**].

    5.2  COLLABORATION PRODUCT.  Each Collaboration Lead Compound shall be
referred to herein as a "Collaboration Product" from and after filing of an IND
in respect of such compound with the FDA or the filing of its equivalent in any
foreign country.  The preparation, filing and prosecution of IND's, NDA's and
other regulatory filings required to be filed with the FDA and its foreign
equivalents in regard to any Collaboration Product will be at the sole expense
of, in the name of and under the direction of Warner.  Warner does not warrant
that any regulatory filings will actually be filed or, if filed, will be
approved.

    5.3  INDEPENDENT DEVELOPMENT.  From time to time, Onyx may request Warner
in writing to undertake specific research and development regarding a
Collaboration Compound or to declare a Collaboration Compound to be a
Collaboration Lead Compound.  Warner will notify Onyx within [**] of receiving
Onyx's written request if it determines before such date that it will not
undertake such specific research and development (or declare such Collaboration
Compound to be a Collaboration Lead Compound) within [**] of such request
("Warner's Notice to Decline").  If Warner does not so notify Onyx within such
[**] period, it will periodically review Onyx's request and if it determines not
to undertake such specific research and development (or declare such
Collaboration Compound to be a Collaboration Lead Compound) then it shall
promptly so notify Onyx (also, "Warner's Notice to Decline").  After either (i)
receipt of Warner's Notice to Decline, or (ii) if Warner does not so notify Onyx
and if Warner does not itself undertake the requested action within [**] of
Onyx's written request, then the date [**] after Warner's receipt of Onyx's
written request, then Onyx shall undertake continued research and development
(including the specific research and development requested by Onyx in its
request to Warner) of such Collaboration Compound independently (an "Onyx Lead
Compound"), at its sole cost and under its sole direction.  Onyx may not utilize
the services of the personnel committed to the Collaboration pursuant to Section
2.2 in performance of research or development of


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an Onyx Lead Compound.  Onyx may declare no more than [**] Onyx Lead Compounds
during the Term of this Agreement.  Onyx will keep Warner currently informed of
all material information in its research and development of each Onyx Lead
Compound and will allow Warner to comment on the direction of such research and
development.  Each Onyx Lead Compound is referred to herein as an "Onyx Product"
from and after filing of an IND in respect of such compound with the FDA or the
filing of its equivalent in any foreign country other than Japan.  Onyx will
provide Warner a complete and accurate copy of the proposed filing, together
with any additional information that Warner may request regarding the relevant
Onyx Lead Compound, at least [**] prior to submitting such filing to the FDA or
its foreign equivalent.  Onyx will be entitled to commercialize any Onyx Product
at its sole direction, alone or with another partner, subject to Section 5.4 and
the other terms of this Agreement.

    5.4  WARNER'S RE-ENGAGEMENT OPTION.  Warner may elect in writing to Onyx to
resume the research and development of an Onyx Lead Compound at its own cost and
under its sole direction at any time prior to [**] in respect of such compound.
In such event, such Onyx Lead Compound shall immediately become a Collaboration
Lead Compound for all purposes under this Agreement.  Promptly after Warner
makes such election, Warner will pay Onyx [**] Onyx's costs incurred for
research and development of such Onyx Lead Compound.  For purposes of this
Section, Onyx's cost for research and development will mean (i) Onyx's "Burdened
Cost" (as defined below) for each professional research and development FTE (not
including the personnel committed to the Collaboration pursuant to Section 2.2)
dedicated to the research and development of such Onyx Lead Compounds (with
appropriate adjustment for staff members not fully dedicated to such work or not
working a full year) and (ii) payments made to unaffiliated third parties, each
to the extent incurred in connection with the relevant compound on or after its
declaration as an Onyx Lead Compound and to the extent reasonably supported by
invoices, time sheets or other appropriate records.  The "Burdened Cost" for
each Onyx FTE shall mean [**] for work performed during 1997, and will be
revised for work performed during each succeeding calendar year by the change in
the Consumer Price Index (as determined by the United States of America
Department of Labor) during the preceding calendar year (except that the
Burdened Cost for work performed during 1998 will be revised only by the change
in the Consumer Price Index from the Effective date to December 31, 1997).

                                      ARTICLE 6

                                LICENSES AND ROYALTIES

    6.1  GRANT BY ONYX.  Onyx hereby grants and agrees to grant to Warner
exclusive, worldwide licenses under the Onyx Patents solely to make, have made,
use and sell (with the right to sublicense) each compound designated as a
Collaboration Lead


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Compound or as a Collaboration Product.  Such licenses with respect to a
Collaboration Lead Compound are co-exclusive between Onyx and Warner.  Such
licenses with respect to a Collaboration Product are exclusive even as to Onyx.

    6.2  GRANT BY WARNER.  Warner hereby grants and agrees to grant to Onyx
exclusive, worldwide licenses under the Warner Patents solely to make, have
made, use and sell (with the right to sublicense) each compound designated as an
Onyx Lead Compound or as an Onyx Product.  Such licenses with respect to an Onyx
Lead Compound are co-exclusive between Onyx and Warner.  Such licenses with
respect to an Onyx Product are exclusive even as to Warner.

    6.3  ROYALTIES PAYABLE BY WARNER.  In part consideration for all rights
granted to Warner and efforts undertaken by Onyx hereunder, Warner will pay Onyx
[**] of Net Sales as a royalty on worldwide sales of Collaboration Products.  If
at the time of the first commercial sale of such Product in such country a
Patent exists that is necessary to sell such Product in such country, or if at
any time after such sale a composition of matter Patent necessary to sell such
Collaboration Product issues in such country, such [**] royalty shall be payable
in respect of sales in such country until the later of (a) the expiration of the
last such Patent to expire and (b) the date such [**] royalty would expire under
the provisions of the following sentence assuming that such Patent did not
exist.  Subject to the terms of the preceding sentence, if in a particular
country there is never an issued Patent that is necessary to sell such Product
in such country, then such [**] royalty will be payable, for sales of such
Product in such country, until the earliest of (x) the later to occur of (i) the
[**] anniversary of such first sale in such country and (ii) expiration of the
last Patent necessary to make or use such Product in such country, which Patent
was in existence on the date of such first commercial sale, (y) the first
calendar quarter in which the sale in such country by any one entity (together
with its Affiliates), other than Warner or its Affiliates or licensees, of one
or more products containing the same active ingredient as such Product,
constitutes [**] or more of all units sold in such country containing such
active ingredient and (z) the first calendar quarter in which the sale in such
country by any entities (taken in the aggregate), other than Warner or its
Affiliates or licensees, of one or more products containing the same active
ingredient as the Product, constitutes [**] or more of all units sold in such
country containing such active ingredient (the period from first commercial sale
in each country until the earlier of (x), (y) and (z) above is referred to
herein as the "Collaboration Product Exclusive Period").  In the case of (y) and
(z) above, the [**] royalty will terminate as to Net Sales of Product sold on or
after the day following the end of the triggering calendar quarter.  Warner will
pay Onyx [**] and [**] of Net Sales as a royalty on sales of Collaboration
Products in each country (except for Japan) for the [**], respectively,
following (a) such final Patent expiration (in the event that the required
Patent necessary to sell such Product in such country existed on the date of
first commercial sale or issued thereafter) or (b) the end of the Collaboration
Product Exclusive Period (if no such Patent existed or issued


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thereafter, and provided that the Collaboration Product Exclusive Period lasted
at least [**] years); provided, however, that no such royalty will be payable in
respect of Collaboration Products sold without the use of one or more trademarks
developed by Warner for such Product during the time that the [**] royalty was
applicable.

    6.4  ROYALTIES PAYABLE BY ONYX.  Onyx will pay Warner [**] of Net Sales as
a royalty on worldwide sales of Onyx Products.  If at the time of the first
commercial sale of such Product in such country a Patent exists that is
necessary to sell such Product in such country, or if at any time after such
sale a composition of matter Patent necessary to sell such Collaboration Product
issues in such country, such [**] royalty shall be payable in respect of sales
in such country until the later of (a) the expiration of the last such Patent to
expire and (b) the date such [**] royalty would expire under the provisions of
the following sentence assuming that such Patent did not exist.  Subject to the
terms of the preceding sentence, if in a particular country there is never an
issued Patent that is necessary to sell such Product in such country, then such
[**] royalty will be payable, for sales of such Product in such country, until
the earliest of (x) the later to occur of (i) the [**] anniversary of such first
sale in such country and (ii) expiration of the last Patent necessary to make or
use such Product in such country, which Patent was in existence on the date of
such first commercial sale, (y) the first calendar quarter in which the sale in
such country by any one entity (together with its Affiliates), other than Warner
or its Affiliates or licensees, of one or more products containing the same
active ingredient as the Product, constitutes [**] or more of all units sold in
such country containing such active ingredient and (z) the first calendar
quarter in which the sale in such country by any entities (taken in the
aggregate), other than Onyx or its Affiliates or licensees, of one or more
products containing the same active ingredient as the Product, constitutes [**]
or more of all units sold in such country containing such active ingredient (the
period from first commercial sale in each country until the earliest of (x), (y)
and (z) above is referred to herein as the "Onyx Product Exclusive Period").  In
the case of (y) and (z) above, the [**] royalty will terminate as to Net Sales
of Product sold on or after the day following the end of the triggering calendar
quarter.  Onyx will pay Warner [**] of Net Sales as a royalty on sales of Onyx
Products in each country (except for Japan) for the [**], respectively,
following (a) such final Patent expiration (in the event that the required
Patent necessary to sell such Product in such country existed on the date of
first commercial sale or issued thereafter) or (b) the end of the Onyx Product
Exclusive Period (if no such Patent existed or issued thereafter, and provided
that the Onyx Product Exclusive Period lasted at least [**] years); provided,
however, that no such royalty will be payable in respect of an Onyx Product sold
without the use of one or more trademarks developed by Onyx for such Product
during the time that the [**] royalty was applicable.

    6.5  THIRD-PARTY ROYALTIES.   Warner understands and agrees  that Onyx has
pre-exisiting royalty obligations to the third parties listed on Schedule 1 with
respect to certain in-licensed Onyx Patents.  In the event that the use and sale
of Collaboration


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Products triggers such pre-existing third-party royalty obligations, [**]
responsible for payment of [**] of such third-party royalties, and [**] will pay
[**].  Until the expiration of Warner royalty obligation pursuant to Section
6.4, Onyx shall not modify the pre-existing royalty rates disclosed on Schedule
1 without the prior written consent of Warner.

    6.6  CURRENCY OF PAYMENT.  All payments to be made under this Agreement
shall be made in United States dollars in the United States to a bank account
designated by the party to be paid.  Royalties earned shall first be determined
in the currency of the country in which they are earned and then converted to
its equivalent in United States currency.  Such conversion shall be based on the
average buying rates of exchange for the currencies involved into the currency
of the United States quoted by Citibank (or its successor in interest) in New
York, New York at the close of business on each business day of the quarterly
period in which the royalties were earned.

    6.7  PAYMENT AND REPORTING.  The royalties due under Section 6.3 or Section
6.5 shall be paid quarterly, within 45 days after the close of each calendar
quarter immediately following each quarterly period in which such royalties are
earned, or earlier if practical.  With each such quarterly payment, the payor
shall furnish the payee a royalty statement, setting forth on a
country-by-country basis the total number of units and Net Sales of each
royalty-bearing Product made, used and/or sold hereunder for the quarterly
period for which the royalties are due.  In addition, the payor shall furnish
such a royalty statement on a country-by-country basis for the first quarter
during which payor makes sales of Product for which no royalty payment in
respect of such country is due hereunder, and shall state the basis for such
sales then being free of royalty obligations hereunder.  The payor shall
thereafter have no further obligation to report the number of units or Net Sales
of such Product made, used and/or sold in such country.

    6.8  RECORDS.  The royalty paying party shall keep accurate books and
accounts of record in connection with the manufacture, use and/or sale by or for
it of the Products hereunder in sufficient detail to permit accurate
determination of all figures necessary for verification of royalty obligations
set forth in this Article VI.  Such records shall be maintained for a period of
3 years from the end of each year in which sales occurred.  The payee, at its
expense, through a certified public accountant, shall have the right to access
such books and records for the sole purpose of verifying the royalty statements;
such access shall be conducted after reasonable prior notice by the payee to the
payor during the payor's ordinary business hours and shall not be more frequent
than once during each calendar year.  Said accountant shall not disclose to the
payee or any other party any information except that which should properly be
contained in a royalty report required under this Agreement.  If such accounting
determines that a party's error resulted in the other party receiving at least
5% less than properly due in respect of any quarter, then the


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party in error will reimburse such amount and reimburse the other party for the
costs of such accounting (including the fees and expenses of the certified
public accountant).

    6.9  TAXES WITHHELD.  Any income or other tax that one party hereunder, its
Affiliates or sublicensees is required to withhold (the "Withholding Party") and
pay on behalf of the other party hereunder (the "Withheld Party") with respect
to the royalties payable under this Agreement shall be deducted from and offset
against said royalties prior to remittance to the Withheld Party; provided,
however, that in regard to any tax so deducted, the Withholding Party shall give
or cause to be given to the Withheld Party such assistance as may reasonably be
necessary to enable the Withheld Party to claim exemption therefrom or credit
therefor, and in each case shall furnish the Withheld Party proper evidence of
the taxes paid on its behalf.

    6.10 COMPUTATION OF ROYALTIES.  All sales of Onyx Products between Onyx and
any of its Affiliates and sublicensees shall be disregarded for purposes of
computing royalties under this Article VI, but in such instances royalties shall
be payable only upon sales to unlicensed third parties.  Nothing herein
contained shall obligate Onyx to pay Warner more than one royalty on any unit of
an Onyx Product.  All sales of Collaboration Products between Warner and any of
its Affiliates and sublicensees shall be disregarded for purposes of computing
royalties under this Article VI, but in such instances royalties shall be
payable only upon sales to unlicensed third parties.  Nothing herein contained
shall obligate Warner to pay Onyx more than one royalty on any unit of a
Collaboration Product or a Warner Product.

    6.11 LICENSES TO AFFILIATES.  Each party shall, at the other party's
request, sign license and/or royalty agreements directly with the other party's
Affiliates and sublicensees in those situations where such agreements would not
decrease the amount of royalties which would be owed hereunder.  Such agreements
shall contain the same language as contained herein with appropriate changes in
parties and territory.  No such license and/or royalty agreement will relieve
Warner or Onyx, as the case may be, of its obligations hereunder, and such party
will guarantee the obligations of its Affiliate or sublicensee in any such
agreement.  Royalties received directly from one party's Affiliates and
sublicensees shall be credited towards such party's royalty obligations under
Section 6.3 or 6.5 hereof, as applicable.

    6.12 RESTRICTIONS ON PAYMENT.  The obligation to pay royalties under this
Agreement shall be waived and excused to the extent that statutes, laws, codes
or government regulations in a particular country prevent such royalty payments
by the seller of Products; provided, however, that if legally permissible, the
seller of Products shall pay the royalties owed to the other party hereto by
depositing such amounts in a bank account in such country that has been
designated by the party owed such royalties.


                                         17.
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                                      ARTICLE 7

                                         FDA

    7.1  SIDE EFFECTS.  Each party shall promptly advise the other by telefax
or overnight delivery service addressed to the attention of its Vice President,
Medical Affairs (or, in Onyx's case, the party with similar responsibilities),
of any unexpected side effect, adverse reaction or injury which has been brought
to that party's attention at any place and which is alleged to have been caused
by a Collaboration Product or an Onyx Product.  Warner, with respect to
Collaboration Products, and Onyx, with respect to Onyx Products, shall have all
rights and responsibility to report such side effect, adverse reaction or injury
to regulatory authorities and others as appropriate.

    7.2  REGULATORY AND OTHER INQUIRIES.  Upon being contacted by the FDA or
any drug regulatory agency for any regulatory purpose pertaining to this
Agreement or to a Collaboration Product, Onyx and Warner shall immediately
notify and consult with one another and Warner shall provide a response as it
deems appropriate.  Warner shall have sole responsibility for responding to all
inquiries to Warner or Onyx regarding the benefits, side effects and other
characteristics of Collaboration Products, and Onyx shall have sole
responsibility for responding to all inquiries to Warner or Onyx regarding the
benefits, side effects and other characteristics of Onyx Products.

    7.3  PRODUCT RECALL.  Warner shall have the responsibility for, and make
the final determination regarding, any recall or other removal of the
Collaboration Product or any lot or lots thereof from the market and shall be
responsible for the cost and expense of notifying customers and the cost and
expense associated with return of the recalled Collaboration Product from a
customer.  Onyx shall have the responsibility for, and make the final
determination regarding, any recall or other removal of the Onyx Product or any
lot or lots thereof from the market and shall be responsible for the cost and
expense of notifying customers and the cost and expense associated with return
of the recalled Onyx Product from a customer.

                                      ARTICLE 8

                         RESEARCH FUNDING FEES AND MILESTONES

    8.1  LICENSE FEES.  Warner will pay Onyx a noncreditable license fee of
[**] payable [**] as specified below:

                                         [**]


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                                         [**]

As used herein, the [**] shall mean the date that is the earlier of (a) [**]
anniversary of the Effective Date, or (b) the date [**], but in no event shall
such date be earlier than [**].

    8.2  RESEARCH FUNDING.  Warner will pay Onyx the following amounts on the
following dates during the Research Term in consideration for work performed by
Onyx prior to the Effective Date and to provide support for Onyx's work under
the Research Plan:

       Later of six month anniversary of the Effective Date 
         or January 1, 1998..................................... [ ** ]
       Nine month anniversary of the Effective Date............. [ ** ]
       Twelve month anniversary of the Effective Date........... [ ** ]
       Fifteen month anniversary of the Effective Date.......... [ ** ]
       Eighteen month anniversary of the Effective Date......... [ ** ]
       Twenty-one month anniversary of the Effective Date....... [ ** ]
       Twenty-four month anniversary of the Effective Date...... [ ** ]
       Twenty-seven month anniversary of the Effective Date..... [ ** ]
       Thirty month anniversary of the Effective Date........... [ ** ]
       Thirty-three month anniversary of the Effective Date..... [ ** ]
                                                                -------
                                                                 [ ** ]

    8.3  MILESTONES.

      (a)  Warner will pay Onyx the following amounts with respect to the first
Collaboration Product to achieve each stated milestone:

       Certification by the RMC that the first screening
       assay has been completed and the hits analyzed........... [ ** ]

       Commencement of Phase I clinical trials by or on
       behalf of Warner anywhere in the world................... [ ** ]

       Commencement of Phase II clinical trials by or on
       behalf of Warner anywhere in the world................... [ ** ]

       Commencement of Phase III clinical trials by or on
       behalf of Warner anywhere in the world................... [ ** ]

       The FDA's acceptance for filing of an NDA................ [ ** ]



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       Acceptance for filing of an MAA applicable to any of
       the following countries: (i) United Kingdom, (ii) Spain,
       (iii) Italy, (iv) France and (v) Germany (each a 
       "Major European Country")................................ [ ** ]
                                                                country, up to
                                                                [ ** ] total  

       Approval by the FDA of an NDA............................ [ ** ]

       Approval of an MAA applicable to a Major European 
       Country.................................................. [ ** ]        
                                                                country, up to 
                                                                [ ** ] total   

       Approval by the MHW of the Collaboration Product in
       Japan (subject to Warner retaining rights in Japan under
       section 5.1(b)).......................................... [ ** ]


                                         [**]

         (b)  Warner will pay Onyx [**] upon the approval by the FDA of an NDA
for the second and each subsequent Collaboration Product so approved and [**]
upon the approval of an MAA applicable to each Major European Country, up to
[**], for the second and each subsequent Collaboration Product so approved,
provided each such Collaboration Product is a different chemical entity.

         (c)  Subject to Warner retaining rights in Japan under Section 5.1(b),
Warner will pay Onyx [**] upon the approval by the MHW of the second and each
subsequent Collaboration Product so approved in Japan, provided each such
Collaboration Product is a different chemical entity.

         (d)  Onyx will pay Warner [**] upon the approval by the FDA of an NDA
for each Onyx Product and [**] upon the approval of an MAA applicable to each
Major European Country, up to [**], and [**] upon approval by the
MHW in Japan.

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                                      ARTICLE 9

                                   CONFIDENTIALITY

    9.1  CONFIDENTIALITY.

         (a)  Except as specifically permitted hereunder, each party hereby
agrees to hold in confidence and not use on behalf of itself or others all data,
samples, technical and economic information (including the economic terms
hereof), commercialization, clinical and research strategies and know-how
provided by the other party (the "Disclosing Party") during the Term of this
Agreement and all data, results and information developed pursuant to the
Collaboration and solely owned by the other party (collectively the
"Confidential Information"), except that the term "Confidential Information"
shall not include:

              (i)  information that is or becomes part of the public domain
through no fault of the non-Disclosing Party or its Affiliates;

              (ii) information that is obtained after the date hereof by the
non-Disclosing Party or one of its Affiliates from any third party which is
lawfully in possession of such Confidential Information and not in violation of
any contractual or legal obligation to the Disclosing Party with respect to such
Confidential Information;

              (iii)     Information that is known to the non-Disclosing Party
or one or more of its Affiliates prior to disclosure by the Disclosing Party, as
evidenced by the non-Disclosing Party's written records; and

              (iv) information that is necessary to be disclosed to any
governmental authorities or pursuant to any regulatory filings, provided that in
such case the non-Disclosing Party notifies the Disclosing Party reasonably in
advance of such disclosure and cooperates with the Disclosing Party to minimize
the scope or content of such disclosure.

         (b)  The obligations of this Section 9.1 shall survive the expiration
or termination of this Agreement.

    9.2  PUBLICITY.  All publicity, press releases and other announcements
relating to this Agreement or the transactions contemplated hereby shall be
reviewed in advance by, and subject to the approval of, both parties; provided,
however, that either party may (i) publicize the existence and general subject
matter of this Agreement without the other party's approval and (ii) disclose
the terms of this Agreement insofar as required to


                                         21.
<PAGE>

comply with applicable securities laws, provided that in the case of such
securities disclosures the disclosing party notifies the other party reasonably
in advance of such disclosure and cooperates to minimize the scope and content
of such disclosure.

    9.3  PUBLICATION.   The parties shall cooperate in appropriate publication
of the results of research and development work performed pursuant to this
Agreement, but subject to the predominating interest to obtain patent protection
for any patentable subject matter.  To this end, it is agreed that prior to any
public disclosure, the party proposing disclosure shall send the other party a
copy of the information to be disclosed, and shall allow the other party [**]
from the date of receipt in which to determine whether the information to be
disclosed contains subject matter for which patent protection should be sought
prior to disclosure.  If notification is not received during the [**] period,
the party proposing disclosure shall be free to proceed with the disclosure.  If
due to a valid business reason or a belief by the nondisclosing party that the
disclosure contains subject matter for which a patentable invention should be
sought, then prior to the expiration of the [**] period, the nondisclosing
party shall so notify the disclosing party, who shall then delay public
disclosure of the information for an additional period of up to [**] to permit
the preparation and filing of a patent application on the subject matter to be
disclosed or other action to be taken.  The party proposing disclosure shall
thereafter be free to publish or disclose the information.  The determination of
authorship for any paper shall be in accordance with accepted scientific
practice.  In no event may any publication or other disclosure contain a party's
Confidential Information without such party's prior written consent.

                                      ARTICLE 10

                            REPRESENTATIONS AND WARRANTIES

    10.1 LEGAL AUTHORITY.  Each party represents and warrants to the other that
it has the legal power, authority and right to enter into this Agreement and to
perform its respective obligations set forth herein.

    10.2 NO CONFLICTS.  Each party represents and warrants that as of the date
of this Agreement it is not a party to any agreement or arrangement with any
third party or under any obligation or restriction, including pursuant to its
Certificate of Incorporation or By-Laws, which in any way limits or conflicts
with its ability to fulfill any of its obligations under this Agreement.

    10.3 OTHERS BOUND.  Each party represents and warrants that anyone
performing services under this Agreement on its behalf shall be bound by all of
the conditions of this Agreement, to the extent necessary to give full effect to
this Agreement.


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                                         22.
<PAGE>

    10.4 THIRD PARTY RIGHTS.  Each party represents and warrants that to the
best of its knowledge its performance of the work under the Collaboration as
contemplated by this Agreement will not infringe the patent, trade secret or
other proprietary rights of any third party except insofar as any infringement
may relate to technology, data or information provided by the other party
hereunder.

    10.5 SURVIVAL.  The foregoing representations and warranties shall survive
the execution, delivery and performance of this Agreement, notwithstanding any
investigation by or on behalf of either party.

    10.6 DISCLAIMER.  Except as otherwise expressly stated herein, Warner
hereby disclaims any warranty expressed or implied as to any Onyx Product sold
or placed in commerce by or on behalf of Onyx.  Except as otherwise expressly
stated herein, Onyx hereby disclaims any warranty expressed or implied as to any
Collaboration Product sold or placed in commerce by or on behalf of Warner.

    10.7 EXCLUSIVITY.  During the Research Term and [**] thereafter (i) neither
party will conduct any research or development in the Field except pursuant to
this Agreement, (ii) neither party will license (or otherwise permit access to)
any of its Patents or Know-How for research or development in the Field to (or
otherwise collaborate on research or development in the Field with) any other
person or entity and (iii) Onyx will not license (or otherwise permit access to)
any assay developed by it pursuant to the Collaboration to any other person or
entity.  In respect of (i), above, each party shall have the right to conduct
its own research and development in the Field during [**] following the end of
the Research Term, provided that all results of such work discovered during such
period (including without limitation compounds and assays), and analogs and
derivatives of compounds identified during such period whenever identified, are
promptly disclosed to the other party and are covered by the licenses granted
under Sections 2.4, 6.1 and 6.2, as applicable.

                                      ARTICLE 11

                                     TERMINATION

    11.1 TERMINATION FOR BREACH.  In the event of a material breach of the
provisions of this Agreement described below, the breaching party shall have 30
days after receipt of written notice from the non-breaching party to cure such
breach.

         (a)  In the event of an uncured material breach of Article II, the
non-breaching party may terminate the Research Term.

         (b)  In the event of an uncured material breach of Section 6.3 by
Warner in respect of a Collaboration Product, Onyx may (i) terminate the
licenses granted by it


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                                         23.
<PAGE>

pursuant to Section 6.1 in respect of such Product and (ii) require Warner to
grant it an exclusive (even as to Warner), worldwide license (with the right to
sublicense) under the Patents relating to such Product and owned or controlled
by Warner, to the extent necessary to make, use or sell such Product.

         (c)  In the event of an uncured material breach of Section 6.5 by Onyx
in respect of an Onyx Product, Warner may (i) terminate the licenses granted by
it pursuant to Section 6.2 in respect of such Product and (ii) require Onyx to
grant it an exclusive (even as to Onyx), worldwide license (with the right to
sublicense) under the Patents relating to such Product and owned or controlled
by Onyx, to the extent necessary to make, use or sell such Product.

    11.2 EFFECT OF BANKRUPTCY.  If either party files a voluntary petition in
bankruptcy, is adjudicated a bankrupt, makes a general assignment for the
benefit of creditors, admits in writing that it is insolvent or fails to
discharge within 15 days an involuntary petition in bankruptcy filed against it,
then the other party will have 60 days to determine whether or not the Research
Term shall immediately terminate.

    11.3 KEY PERSONNEL.

         (a)  Promptly after the Effective Date, Onyx shall recruit and hire 
an employee (the "Project Director") to have overall responsibility for the 
success of the collaboration.  Warner shall have the right to approve the 
hiring of such Project Director prior to such hiring, which approval shall 
not be unreasonably withheld or delayed.  In the event that Onyx has not 
hired such Project Director approved by Warner by the six month anniversary 
of the Effective Date, then by notice delivered to Onyx during the [**] 
period after such date, Warner may voluntarily terminate the Research Term, 
effective immediately, if in its sole opinion it does not wish to continue 
the Research Plan without such employee.  Such termination shall terminate 
all obligations to make any payments under Sections 8.1, 8.2 and 8.3, EXCEPT 
THAT Warner shall remain obligated to make payment for any milestones under 
Section 8.3(a) that were earned prior to the effective date of such 
termination.  If the first screening assay has been transferred by Onyx but 
the hits have not yet been analyzed by Warner prior to the termination date, 
then the first [**] milestone is still due to Onyx once the hits are analyzed 
by Warner, which analysis shall be performed diligently.  In addition, if 
Warner and Onyx mutually agree to do so, then the work conducted by Onyx may 
be wound down and ended in an orderly [**] phase out period after the date of 
such termination, during which time Onyx will make best efforts to transfer 
specified assays currently under development at Onyx, and Warner shall pay 
Onyx a total of [**] to support such research efforts, in two equal quarterly 
payments commencing upon such termination.  Onyx agrees further to hire [**] 
as a consultant on the project hereunder for [**] following the Effective 
Date.

[**] Confidential Treatment Requested


                                         24.
<PAGE>

         (b)  In the event that on or before the [**] anniversary of the
Effective Date [**] or the Project Director (i) is physically and mentally
capable of overseeing Onyx's work under the Research Plan but (ii) for any
reason fails to oversee such work, then Onyx shall immediately notify Warner
thereof and Onyx will have up to [**] after such failure to hire a replacement
for [**] or the Project Director, as applicable (the "Search Period").  By
notice delivered to Onyx during the [**] period after the end of the Search
Period, Warner may voluntarily terminate the Research Term, effective [**] after
the end of the Search Period, if in its sole opinion it does not wish to
continue the Research Plan with such replacement (or with [**] or the Project
Director if they become available again).  Warner will be required to make any
license fee payments under Section 8.1 and research funding payments under
Section 8.2 that come due on or before the effective date of such termination,
and Onyx will continue to be obligated under the terms of Section 2.2 during
such period.

         (c)  In the event Warner terminates the Research Term under this
Section 11.3, then the term "Collaboration Compound" as used under this
Agreement shall, in addition to the definition provided in Article 1 hereof, be
deemed to cover any compound whose activity in the Field was initially
identified based on screening in assays transferred to Warner by Onyx under this
Agreement.  Onyx and Warner will be released from the provisions of Section 10.7
immediately upon termination of the Research Term pursuant to this Section 11.3.


    11.4 REMEDIES.  In the event of any breach of any provision of this
Agreement, in addition to the termination rights set forth herein, each party
shall have all other rights and remedies at law or equity to enforce this
Agreement.

    11.5 VOLUNTARY TERMINATION.  Warner may terminate this Agreement by
providing written notice thereof to Onyx on the eighteen month anniversary of
the Effective Date.  In such event, the Term of this Agreement will
automatically terminate.  Notwithstanding the voluntary termination of the Term
of this Agreement, Warner will make all research payments to Onyx that are due
before the second anniversary of the Effective Date pursuant to Section 8.2
(payable on the dates that such payments are due).  If Warner terminates the
Agreement under this Section 11.5, then:  (i) Warner will grant Onyx an
exclusive (even as to Warner), world-wide, fully-paid, perpetual license under
Warner's Patents and Warner's Know-How discovered or reduced to practice prior
to the one year anniversary of the termination of the Term of this Agreement
that are necessary to make, use and sell any Collaboration Compound for
therapeutic or diagnostic use in the Field, (ii) the licenses granted under
Section 6.1 will terminate and (iii) the licenses granted to Warner under
Section 2.4 will terminate.


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                                         25.
<PAGE>

                                      ARTICLE 12

                                  GENERAL PROVISIONS

    12.1 INDEMNIFICATION.  Each of Warner and Onyx agrees to indemnify and hold
harmless the other party and its Affiliates and their respective employees,
agents, officers, directors and permitted assigns (such party's "Indemnified
Group") from and against any claims, judgments, expenses (including reasonable
attorney's fees), damages and awards (collectively a "Claim") arising out of or
resulting from (i) its negligence or misconduct in regard to any Product, (ii) a
breach of any of its representations or warranties hereunder or (iii) the
manufacture, use or sale of a Collaboration Product (in the case of Warner) or
an Onyx Product (in the case of Onyx), except to the extent that such Claim
arises out of or results from the negligence or misconduct of a party seeking to
be indemnified and held harmless or the negligence or misconduct of a member of
such party's Indemnified Group.  A condition of this obligation is that,
whenever an indemnified party has information from which it may reasonably
conclude an incident has occurred which could give rise to a Claim, such
indemnified party shall immediately give notice to the indemnifying party of all
pertinent data surrounding such incident and, in the event claim is made or suit
is brought, all indemnified parties shall assist the indemnifying party and
cooperate in the gathering of information with respect to the time, place and
circumstances and in obtaining the names and addresses of any injured parties
and available witnesses.  No indemnified party shall, except at its own cost,
voluntarily make any payment or incur any expense in connection with any such
Claim or suit without the prior written consent of the indemnifying party.  The
obligations set forth in this Section shall survive the expiration or
termination of this Agreement.

    12.2 ASSIGNMENT.  This Agreement shall not be assignable by either party
without the prior written consent of the other party, such consent not to be
unreasonably withheld.  In no event will any assignment relieve the assigning
party of its obligations hereunder.  This Agreement shall be binding upon and,
subject to the terms of the foregoing sentence, inure to the benefit of the
parties' successors, legal representatives and assigns.  Notwithstanding the
foregoing, Warner may assign this Agreement to any of its wholly-owned
subsidiaries or any entity succeeding to a majority of its Parke-Davis business,
and either party may assign this Agreement to its successor in connection with
any merger, consolidation or sale of all or substantially all of its assets.

    12.3 NON-WAIVER.  The waiver by either of the parties of any breach of any
provision hereof by the other party shall not be construed to be a waiver of any
succeeding breach of such provision or a waiver of the provision itself.

    12.4 RESEARCH DISPUTE RESOLUTION.  The parties recognize that the
collaborative research program under the Research Plan may require the
resolution of certain issues or


                                         26.
<PAGE>

the negotiation of additional agreements in the future.  In the event the
Research Management Committee is unable to resolve a dispute under the Research
Plan, either party may have the dispute referred to the President of Onyx and
the senior officer of Warner's pharmaceutical business for good faith
resolution.

    12.5 GOVERNING LAW.  This Agreement shall be construed and interpreted in
accordance with the laws of the State of New York, other than those provisions
governing conflicts of law.

    12.6 PARTIAL INVALIDITY.  If and to the extent that any court or tribunal
of competent jurisdiction holds any of the terms or provisions of this
Agreement, or the application thereof to any circumstances, to be invalid or
unenforceable in a final nonappealable order, the parties shall use their best
efforts to reform the portions of this Agreement declared invalid to realize the
intent of the parties as fully as practical, and the remainder of this Agreement
and the application of such invalid term or provision to circumstances other
than those as to which it is held invalid or unenforceable shall not be affected
thereby, and each of the remaining terms and provisions of this Agreement shall
remain valid and enforceable to the fullest extent of the law.

    12.7 NOTICE.  Any notice to be given to a party under or in connection with
this Agreement shall be in writing and shall be (i) personally delivered, (ii)
delivered by a nationally recognized overnight courier or (iii) delivered by
certified mail, postage prepaid, return receipt requested to the party at the
address set forth below for such party:


     To Warner:                          To Onyx:

     Senior Vice President, Research     Hollings Renton
     Parke-Davis Pharmaceutical          President & CEO
       Research Division,                Onyx Corporation
     Warner-Lambert Company              3031 Research Drive
     2800 Plymouth Road                  Building A
     Ann Arbor, MI  48105                Richmond, CA  94806

     with a copy to:                     with a copy to:

     President, Parke-Davis              Robert L. Jones, Esq.
     United States and Mexico            Cooley Godward LLP
     Warner-Lambert Company              5 Palo Alto Square
     201 Tabor Road                      4th Floor
     Morris Plains, NJ  07950            Palo Alto, CA  94306


                                         27.
<PAGE>

     and a copy to:

     Vice President and General Counsel
     Warner-Lambert Company
     201 Tabor Road
     Morris Plains, NJ  07950


or to such other address as to which the party has given notice thereof.  Such
notices shall be deemed given upon receipt.

    12.8 VACCINES AND DIAGNOSTICS.  Pursuant to an Agreement, between Chiron
Corporation ("Chiron") and Onyx, dated April 24, 1992, Chiron has certain rights
to Vaccines and Diagnostics developed by Onyx.  Warner and Onyx agree that,
notwithstanding any other term or provision of this Agreement to the contrary,
neither party shall license to the other any Patents or Know-How to make, use or
sell Vaccines or Diagnostics.  Furthermore, each party hereto may make, use or
sell Vaccines and Diagnostics in the Field without obligation to the other
party, including as it relates to payment of milestones and royalties.  As used
in this Section, (i) "Vaccines" shall mean [**], and (ii) "Diagnostics" shall
mean [**].

    12.9 HEADINGS.  The headings appearing herein have been inserted solely for
the convenience of the parties hereto and shall not affect the construction,
meaning or interpretation of this Agreement or any of its terms and conditions.

    12.10     NO IMPLIED LICENSES OR WARRANTIES.  No right or license under any
patent application, issued patent, know-how or other proprietary information is
granted or shall be granted by implication.  All such rights or licenses are or
shall be granted only as expressly provided in the terms of this Agreement.
Neither party warrants the success of any clinical or other studies undertaken
by it.

    12.11     FORCE MAJEURE.  No failure or omission by the parties hereto in
the performance of any obligation of this Agreement shall be deemed a breach of
this Agreement nor shall it create any liability if the same shall arise from
any cause or causes beyond the reasonable control of the affected party,
including, but not limited to, the following, which for purposes of this
Agreement shall be regarded as beyond the control of the party in question: acts
of nature; acts or omissions of any government; any rules, regulations, or
orders issued by any governmental authority or by any officer, department,


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                                         28.
<PAGE>

agency or instrumentality thereof; fire; storm; flood; earthquake; accident;
war; rebellion; insurrection; riot; invasion; strikes; and lockouts or the like;
provided that the party so affected shall use its best efforts to avoid or
remove such causes or nonperformance and shall continue performance hereunder
with the utmost dispatch whenever such causes are removed.

    12.12     SURVIVAL.  The representations and warranties contained in this
Agreement as well as those rights and/or obligations contained in the terms of
this Agreement which by their intent or meaning have validity beyond the term of
this Agreement shall survive the termination or expiration of this Agreement.

    12.13     ENTIRE AGREEMENT.  This Agreement constitutes the entire
understanding between the parties with respect to the subject matter contained
herein and supersedes any and all prior agreements, understandings and
arrangements whether oral or written between the parties relating to the subject
matter hereof.  This Agreement will control in the event of any conflict between
this Agreement and the Research Plan.

    12.14     AMENDMENTS.  No amendment, change, modification or alteration of
the terms and conditions of this Agreement shall be binding upon either party
unless in writing and signed by the party to be charged.

    12.15     INDEPENDENT CONTRACTORS.  It is understood that both parties
hereto are independent contractors and engage in the operation of their own
respective businesses, and neither party hereto is to be considered the agent or
partner of the other party for any purpose whatsoever.  Neither party has any
authority to enter into any contracts or assume any obligations for the other
party or make any warranties or representations on behalf of the other party.

    12.16     COUNTERPARTS.  This Agreement may be executed in counterparts,
each of which shall be deemed an original and both of which together shall
constitute one and the same instrument.


                                         29.
<PAGE>

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


ONYX PHARMACEUTICALS, INC.        WARNER-LAMBERT COMPANY



By: /s/ Hollings C. Renton             By: /s/ Ronald M. Cresswell
   --------------------------------       --------------------------------

Name: Hollings C. Renton               Name: Ronald M. Cresswell, Ph.D.,
                                             F.R.S.E.
     ------------------------------         ------------------------------
Title: President & CEO                 Title: Vice President and Chairman
      -----------------------------           Parke-Davis Pharmaceutical
                                              Research 
                                              Warner-Lambert Company
                                             -----------------------------



                                         30.
<PAGE>

                                      SCHEDULE 1

                     PRE-EXISTING THIRD-PARTY ROYALTY OBLIGATIONS


1)  Research and Option Agreement Between the Research Foundation of State
    University of New York and ONYX Pharmaceuticals dated January 1, 1996.

    Royalty cap of [**] on net sales of products arising from research
    sponsored by Onyx.


2)  Option Agreement with the Babraham Institute dated September 25, 1995 and
    extended on May 13, 1996.

    Royalty of [**] of the end user price of a product arising from work
    performed by Dr. Len Stephens for or in collaboration with Onyx.


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<PAGE>


                                      EXHIBIT 1


RESEARCH PLAN:  ONYX/PARKE-DAVIS INFLAMMATION PROGRAM


The allocation of resources and prioritization of the projects within the Field
will be done on an ongoing basis by the project team consisting of both Onyx and
Parke-Davis scientists, with quarterly review and approval by the Research
Management Committee.  The scope of the program is outlined in the document
entitled "Inflammation Program - Research Plan" submitted by Onyx to Parke-Davis
on January 9, 1997.  Initial plans for the program are outlined below.


The goal of the project will be to move [**] per year into the programs as full
drug discovery projects as outlined below.  The responsibilities of Onyx and
Parke-Davis are as follows, with modifications to be made as the Research
Management Committee prioritizes available resources:

- -   Onyx will devise assays suitable for high volume screening, and transfer
    those assays to Parke-Davis, including all biological materials in
    quantities needed to run the screen on the entire Parke-Davis compound
    library.

- -   Parke-Davis will run each assay against the entire compound collection,
    currently about 200,000 compounds, but anticipated to grow substantially
    during the course of this collaboration.  Parke-Davis will also run this
    primary screening assay against all compounds newly synthesized for the
    project.  Onyx will screen its library if the research team decides it is 
    appropriate.

- -   Onyx will develop assays to determine the specificity of compounds for the
    intended target, and cellular assays to establish that the compounds are
    effecting the intended target in cells, and run these assays against
    compounds, either from the compound library or newly synthesized, that have
    proven to be active in the primary assay.

- -   Parke-Davis will undertake medicinal chemistry to devise novel compounds
    with improved efficacy and specificity.

- -   Parke-Davis will develop cellular and in vivo models to test compounds for
    efficacy, and run these models with compounds that have met criteria in the
    primary and secondary assays.  When appropriate, pharmacokinetics will be
    tested before or in parallel with the in vivo testing.

- -   All development activities will be the responsibility of Parke-Davis.



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                                         1-i

<PAGE>

In addition to the direct drug discovery activities, Onyx will undertake an
exploratory research program that will identify and validate new targets, and
bring a subset of these targets to the stage of the full discovery projects
described above.  The Research Management Committee will designate which targets
enter the screening phase.



INITIAL TARGETS


The initial assays to be targeted are:


1)  [**]  Onyx has a cell-free enzymatic assay to screen for compounds
    inhibiting [**] that will be transferred for screening at Parke-Davis as
    soon as the agreement is concluded.  The enzyme used in this assay is
    comprised of the reconstituted individual components of the complex.  The
    assay can be initiated using [**]  A [**] assay will serve as the
    counterscreen for potential hits.

2)  [**]  Onyx is working closely with [**] to [**] and develop an assay using
    proteins produced in vivo.  A [**] assay will serve as a counterscreen. 
    Secondary in vitro assays could include [**] in a reconstituted cell
    culture model.

3)  [**]  The constitutive activation of [**] affords a simple assay that is
    ready to enter a screening mode.  Cell based assays to confirm selectivity
    could include (i) [**] or (ii) [**]


Each of the initial assays may be followed by additional assays to target other
aspects of the target.  These could include:

- -   Assays for [**]


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                                         1-ii

<PAGE>

- -   Identification of [**]

- -   Identification of [**]

- -   Study of [**]


Other research areas on these targets could include:

- -   Characterization of [**]

- -   Working with collaborators, produce [**]

- -   Study interaction of [**] including [**]  Also study of activation of [**] 
    These interactions may represent future targets for the screening assays.

- -   With a combination of external collaborators and in house efforts,
    undertake production of protein and crystallography of targets, with and
    without discovered compounds.



EXPLORATORY RESEARCH


Onyx will conduct a research program to discover new pathways and targets that
will be the basis of assays and screening programs in later years of the
collaboration.  These research areas, outlined more fully in the proposal of
January 9, include:

- -   [**]

- -   [**]

- -   [**]

- -   [**]




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                                        1-iii

<PAGE>

                                                        EXHIBIT 10.21

[IMPERIAL BANK LETTERHEAD]


October 15, 1997

ONYX PHARMACEUTICALS, INC.
3031 Research Drive, Bldg. A
Richmond, CA 94806

Attention:  Hollings Renton, CEO
            Douglas Blankenship, Director, Finance

Re:  Imperial Bank Loan No. 00700001230

Gentlemen:

With reference to the Credit Terms and Conditions dated March 10, 1997 with 
attached Addendum to the Credit Terms and Conditions also dated March 10, 
1997 between Imperial Bank ("Bank") and ONYX Pharmaceuticals, Inc. 
("Borrower") in connection with the above-referenced loan ("Loan") the Bank 
and Borrower hereby modify the following numbered terms and conditions of the 
Addendum to the Credit Terms and Conditions (hereinafter referred to as the 
"Addendum"):

1.  Paragraph 2 of the Addendum is deleted in its entirety and is replaced 
    with the following:

    "2.  MATURITY

    January 15, 2001."

2.  Paragraph 3 of the Addendum is deleted in its entirety and is replaced 
    with the following:

    "3.  TERMS

    Line shall be available for draws through January 15, 1998. Interest 
    payable monthly through January 15, 1998, followed by equal monthly 
    payments of principal plus interest.

3.  Paragraph 5 of the Addendum is deleted in its entirety and is replaced 
    with the following:

    "5.  BORROWING FORMULA

    Borrower shall be allowed up to $2,000,000 in non-formula advances. For 
    amounts over $2,000,000, advances shall be limited to 100% against the 
    invoice price of new equipment purchases (less tax and freight) and new 
    leasehold improvements, and 100%


<PAGE>

ONYX Pharmaceuticals, Inc.
October 15, 1997
Page 2 of 2
- -------------------------------------------------------------------------------

    against the book value of previously purchased equipment and leaseholds 
    owned by Borrower without lien to a third party. Advances against 
    leaseholds shall be limited to a maximum of $2,000,000."

Additional condition:

1.  Borrower agrees to pay Bank a fee equal to 0.1875% of the difference 
    between $7,000,000 and the total advances under this commitment as of 
    January 15, 1998

Except for the above-described modifications, the Agreement shall remain 
unaltered and in full force and effect.

Please acknowledge your approval by signing and returning the original of 
this letter to me.

Sincerely,

/s/ Tom Jorgensen

Tom Jorgensen
Assistant Vice President
Emerging Growth Industries

Accepted and agreed to:

ONYX PHARMACEUTICALS, INC.


By:     /s/ Douglas Blankenship           By:     /s/ Hollings Renton
   ----------------------------------        --------------------------------
        Douglas Blankenship                       Hollings Renton

Title:  Director of Finance               Title:  CEO
      -------------------------------           -----------------------------

Date:   16 October 1997                   Date:   16 October 1997
     --------------------------------          ------------------------------


<PAGE>

                             ONYX PHARMACEUTICALS, INC.

Exhibit 11.1

                        COMPUTATION OF NET LOSS PER SHARE 
                    (In thousands, except per share amounts)
                                   (unaudited)
                                           


<TABLE>
<CAPTION>


                                                              Three Months Ended             Nine Months Ended
                                                                 September 30,                 September 30, 
                                                          ---------------------------   ---------------------------
                                                              1997           1996           1997           1996
                                                          ------------   ------------   ------------   ------------
<S>                                                     <C>            <C>             <C>           <C>
NET LOSS:                                                 $    (4,407)   $  (1,242)     $ (10,658)     $  (5,902)
                                                          -----------    ---------      ---------      ---------
                                                          -----------    ---------      ---------      ---------
Shares used in net loss per share computation:


Weighted average shares of common stock                                   
    outstanding:                                                9,816        9,461          9,678          5,417

Shares related to Staff Accounting
    Bulletins Nos. 55, 64 and 83                                    -            -              -            142
                                                          -----------    ---------      ---------      ---------

Shares used in net loss per share
    computation:                                                9,816        9,461          9,678          5,559
                                                          -----------    ---------      ---------      ---------
                                                          -----------    ---------      ---------      ---------

    
Net loss per share                                        $     (0.45)   $   (0.13)     $   (1.10)     $   (1.06)
                                                          -----------    ---------      ---------      ---------
                                                          -----------    ---------      ---------      ---------


CALCULATION OF SHARES OUTSTANDING FOR                              
COMPUTING PRO FORMA NET LOSS PER SHARE:

Shares used in computing historical net
    loss per share (from above):                                                                           5,559

Adjusted to reflect the effect of the assumed
    conversion of convertible preferred stock 
    from the date of issuance:                                                                             2,500
                                                                                                       ---------
Shares used in computing pro forma net loss
    per share:                                                                                             8,059
                                                                                                       ---------
                                                                                                       ---------

Pro forma net loss per share                                                                           $   (0.73)
                                                                                                       ---------
                                                                                                       ---------

</TABLE>



<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-START>                             JAN-01-1997
<PERIOD-END>                               SEP-30-1997
<CASH>                                          12,310
<SECURITIES>                                    22,258
<RECEIVABLES>                                        0
<ALLOWANCES>                                         0
<INVENTORY>                                          0
<CURRENT-ASSETS>                                35,194
<PP&E>                                          10,104
<DEPRECIATION>                                 (5,711)
<TOTAL-ASSETS>                                  40,721
<CURRENT-LIABILITIES>                            6,578
<BONDS>                                            208
                                0
                                          0
<COMMON>                                            10
<OTHER-SE>                                      34,000
<TOTAL-LIABILITY-AND-EQUITY>                    40,721
<SALES>                                              0
<TOTAL-REVENUES>                                 6,190
<CGS>                                                0
<TOTAL-COSTS>                                   18,381
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                  41
<INCOME-PRETAX>                               (10,658)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                           (10,658)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (10,658)
<EPS-PRIMARY>                                   (1.10)
<EPS-DILUTED>                                   (1.10)
        

</TABLE>


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