NEUROCRINE BIOSCIENCES INC
10-Q, 1999-11-12
BIOLOGICAL PRODUCTS, (NO DIAGNOSTIC SUBSTANCES)
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<PAGE>
================================================================================


                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549
                              ---------------------


                                    FORM 10-Q

                                   (Mark One)

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

                For the quarterly period ended SEPTEMBER 30, 1999

                                       OR

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

  For the transition period from ______________________ to ____________________


                         Commission file number 0-28150


                          NEUROCRINE BIOSCIENCES, INC.
             (Exact name of registrant as specified in its charter)

                               DELAWARE 33-0525145
        (State or other jurisdiction of (IRS Employer Identification No.)
                         incorporation or organization)

                           10555 SCIENCE CENTER DRIVE
                           SAN DIEGO, CALIFORNIA 92121
                    (Address of principal executive offices)

                                 (858) 658-7600
              (Registrant's telephone number, including area code)


    Indicate  by check mark  whether  the  registrant  (1) has filed all reports
required to be filed by Section 13 or 15(d) of the  Securities  Exchange  Act of
1934  during  the  preceding  12 months  (or for such  shorter  period  that the
registrant was required to file such reports),  and (2) has been subject to such
filing requirements for the past 90 days:

                                    Yes X No

    The number of outstanding shares of the registrant's Common Stock, par value
of $0.001, was 19,081,984 as of October 31, 1999.

================================================================================

<PAGE>


                           NEUROCRINE BIOSCIENCES, INC
                                 FORM 10-Q INDEX


                                                                            PAGE
PART I.         FINANCIAL INFORMATION

  ITEM 1:  Financial Statements...........................................     3

           Condensed Consolidated Balance Sheets as of September 30, 1999
            and December 31, 1998.........................................     3

           Condensed Consolidated Statements of Operations for the three
            and nine months ended September 30, 1999 and 1998.............     4

           Condensed Consolidated Statements of Cash Flows for nine months
            ended September 30, 1999 and 1998.............................     5

           Notes to the Condensed Consolidated Financial Statements.......     6

  ITEM 2:  Management's Discussion and Analysis of Financial Condition
            and Results of Operations.....................................     7

  ITEM 3:  Quantitative and Qualitative Disclosures About Market Risk....     11

PART II.        OTHER INFORMATION

  ITEM 5:  Other Information.............................................     12

  ITEM 6:  Exhibits and Reports on Form 8-K..............................     12

  SIGNATURES.............................................................     12

  INDEX TO EXHIBITS......................................................     13


<PAGE>

                          PART I. FINANCIAL INFORMATION

Item 1.  Financial Statements

                          NEUROCRINE BIOSCIENCES, INC.
                      CONDENSED CONSOLIDATED BALANCE SHEETS
                                 (in thousands)
                                                            Sep 30,     Dec 31,
                                                             1999        1998
                                                          ----------  ----------
                                                          (unaudited)
                                     ASSETS
Current assets:
    Cash and cash equivalents ..........................   $  7,591    $ 11,708
    Short-term investments, available-for-sale .........     40,946      50,962
    Receivables under collaborative agreements .........      3,591         863
    Receivables from related parties ...................      1,045         544
    Other current assets ...............................      1,059       1,556
                                                            --------    --------
       Total current assets ............................     54,232      65,633

    Property and equipment, net ........................     11,521      10,899
    Other assets .......................................      2,534       3,997
                                                            --------    --------
       Total assets ....................................   $ 68,287    $ 80,529
                                                            ========    ========

                      LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
    Accounts payable ...................................   $    811    $  2,481
    Accrued liabilities ................................      2,532       2,077
    Deferred revenues ..................................        736         169
    Current portion of long-term debt ..................        149         149
    Current portion of capital lease obligations .......        772         693
                                                            --------    --------
       Total current liabilities .......................      5,000       5,569


    Long-term debt .....................................        349         461
    Capital lease obligations ..........................      1,882       1,786
    Deferred rent ......................................        834         257
    Other liabilities ..................................        929         498
                                                            --------    --------
      Total liabilities ...............................      8,994       8,571

Stockholders' equity:
    Preferred Stock, $0.001 par value; 5,000,000 shares
       authorized; no shares issued and outstanding ....       --          --
    Common Stock, $0.001 par value; 100,000,000 shares
       authorized; issued and outstanding shares were
       19,080,853 in 1999 and 18,930,865 in 1998 .......         19          19
    Additional paid in capital .........................     97,864      97,064
    Deferred compensation and shareholder notes ........       (496)       (306)
    Accumulated other comprehensive (loss) income ......       (111)         31
    Accumulated deficit ................................    (37,983)    (24,850)
                                                            --------    --------
       Total stockholders' equity ......................     59,293      71,958
                                                            --------    --------
       Total liabilities and stockholders' equity ......   $ 68,287    $ 80,529
                                                            ========    ========

   See accompanying notes to the condensed consolidated financial statements.

<PAGE>


                          NEUROCRINE BIOSCIENCES, INC.
                 CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
              (unaudited; in thousands except loss per share data)

<TABLE>
<CAPTION>

                                               Three Months Ended      Nine Months Ended
                                                  September 30,          September 30,
                                             ---------------------   ---------------------
                                                 1999        1998        1999        1998
                                             ---------------------   ---------------------
<S>                                          <C>         <C>         <C>         <C>
Revenues:
    Sponsored research and development ...   $  4,209    $  2,112    $  9,760    $  6,749
    Sponsored research and development
     from related party ..................       --         2,066         501       2,066
    Milestones ...........................        750         750       1,500       2,000
    Grant income and other revenues ......        272         126         831         666
                                              --------    --------    --------    --------
       Total revenues ....................      5,231       5,054      12,592      11,481

Operating expenses:
    Research and development .............      8,331       6,393      21,893      15,457
    General and administrative ...........      1,882       1,814       5,587       4,681
    Write-off of acquired in-process
     research and development and licenses       --          --          --         4,910
                                              --------    --------    --------    --------
       Total operating expenses ..........     10,213       8,207      27,480      25,048

Loss from operations .....................     (4,982)     (3,153)    (14,888)    (13,567)

Other income and (expenses):
    Interest income ......................        623       1,174       2,209       3,293
    Interest expense .....................        (59)        (23)       (169)        (87)
    Equity in NPI loss and
     other adjustments ...................       (284)     (2,299)     (1,174)     (3,742)
    Other income .........................        295         264         889         905
                                              --------    --------    --------    --------
Loss before taxes ........................     (4,407)     (4,037)    (13,133)    (13,198)

Income taxes .............................       --          --          --          --
                                              --------    --------    --------    --------
Net loss .................................   $ (4,407)   $ (4,037)   $(13,133)   $(13,198)
                                              ========    ========    ========    ========

Loss per common share:
    Basic & Diluted                          $  (0.23)   $  (0.22)   $  (0.69)   $  (0.74)

Shares used in the calculation
 of loss per common share:
    Basic & Diluted                            19,006      18,189       18,975     17,925
</TABLE>


   See accompanying notes to the condensed consolidated financial statements.


<PAGE>


                          NEUROCRINE BIOSCIENCES, INC.
                 CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS
                            (unaudited; in thousands)

                                                            Nine Months Ended
                                                               September 30,
                                                         -----------------------
                                                            1999          1998
                                                         ----------  -----------
CASH FLOW FROM OPERATING ACTIVITIES
Net loss ..............................................   $(13,133)   $(13,198)
Adjustments to reconcile net loss to net cash
  provided by (used in) operating activities:
      Acquisition of NNL ..............................       --         4,200
      Equity in NPI losses and other adjustments ......      1,175       1,281
      Depreciation and amortization ...................      1,532       1,261
      Deferred revenues ...............................        567        (875)
      Deferred expenses ...............................      1,260         185
      Change in operating assets and liabilities,
        net of acquired business:
           Accounts receivable and other current assets     (2,732)       (522)
           Other non-current assets ...................        124         924
           Accounts payable and accrued liabilities ...     (1,215)     (1,249)
                                                           --------    --------
Net cash flows used in operating activities ...........    (12,422)     (7,993)

CASH FLOW FROM INVESTING ACTIVITIES
Purchases of short-term investments ...................    (26,763)    (31,144)
Sales/maturities of short-term investments ............     36,637      42,961
Purchases of property and equipment ...................     (1,990)     (3,069)
                                                           --------    --------
Net cash flows provided by investing activities .......      7,884       8,748

CASH FLOW FROM FINANCING ACTIVITIES
Issuance of Common Stock ..............................        358         477
Proceeds from capital lease financing .................        771       2,334
Principal payments on long-term obligations ...........       (708)       (776)
Payments received on notes receivable from stockholders       --             1
                                                           --------    --------
Net cash flows provided by financing activities .......        421       2,036

                                                           --------    --------
Net (decrease) increase in cash and cash equivalents ..     (4,117)      2,791

Cash and cash equivalents at beginning of the period ..     11,708      15,771
                                                           --------    --------
Cash and cash equivalents at end of the period ........   $  7,591    $ 18,562
                                                           ========    ========


   See accompanying notes to the condensed consolidated financial statements.




<PAGE>


                          NEUROCRINE BIOSCIENCES, INC.
            NOTES TO THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS
                                   (unaudited)

1.  BASIS OF PRESENTATION

    The  condensed   consolidated   financial  statements  included  herein  are
unaudited.  These  financial  statements  include  the  accounts  of  Neurocrine
Biosciences,   Inc.  ("Neurocrine"  or  the  "Company")  and  its  wholly  owned
subsidiary,  Northwest  NeuroLogic,  Inc. ("NNL"). All significant  intercompany
transactions  have been  eliminated in  consolidation.  The  Company's  minority
ownership interest in Neuroscience  Pharma,  Inc. ("NPI") has been accounted for
under the equity method. Certain  reclassifications have been made to prior year
amounts to  conform  to the  presentation  for the three and nine  months  ended
September 30, 1999.

    The  condensed  consolidated  financial  statements  have been  prepared  in
accordance with generally accepted  accounting  principles for interim financial
information and with the instructions of the Securities and Exchange  Commission
on Form 10-Q and Rule 10-01 of Regulation S-X. 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,
these  financial  statements  include  all  adjustments  (consisting  of  normal
recurring  adjustments)  necessary  for a fair  presentation  of  the  financial
position, results of operations, and cash flows for the periods presented.

    The results of operations  for the interim  periods shown in this report are
not necessarily  indicative of results expected for the full year. The financial
statements should be read in conjunction with the audited  financial  statements
and notes for the year ended December 31, 1998, included in the Company's Annual
Report on Form 10-K filed with the Securities and Exchange Commission.

2.  NET INCOME PER SHARE

     In accordance with Financial  Accounting Standards Board Statement No. 128,
"Earnings  Per Share",  basic  earnings per share is  calculated by dividing net
income by the  weighted  average  number of common  shares  outstanding  for the
period. Diluted earnings per share reflects the potential dilution of securities
that could share in the  earnings of the Company  such as common stock which may
be issuable  upon exercise of  outstanding  common stock  options,  warrants and
preferred stock.  These shares are excluded when their effects are antidilutive.
For the three and nine months  ended  September  30, 1999 and 1998,  potentially
dilutive   securities  were  excluded  from  the  diluted   earnings  per  share
calculation.

3.  COMPREHENSIVE INCOME

     Financial  Accounting  Standards  Board  Statement No. 130,  "Comprehensive
Income",  requires the  disclosure of all  components of  comprehensive  income,
including net income and changes in equity during a period from transactions and
other  events  and  circumstances   generated  from  non-owner  sources.   Other
comprehensive  income  consisted of gains (losses) on short-term  investments of
$8,000 and  ($142,000)  for the three and nine months ended  September 30, 1999;
and $16,000 and $21,000 for the same periods in 1998, respectively.

4.  SEGMENT INFORMATION

     Financial Accounting Standards Board Statement No. 131,  "Disclosures about
Segments of an Enterprise and Related  Information",  establishes  standards for
reporting financial and descriptive  information about an enterprise's operating
segments in its annual financial  statements and selected segment information in
interim  financial  reports.  The  Company  is  engaged  in  the  discovery  and
development  of  prescription  drugs and considers its operations to be a single
reportable  segment.  Financial results of this reportable segment are presented
in the accompanying financial statements. The Company has no foreign operations.

<PAGE>

Item 2:  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
                          RESULTS OF OPERATIONS

     The following  Management's  Discussion and Analysis of Financial Condition
and Results of  Operations  of the Company  contain  forward-looking  statements
which  involve  risks and  uncertainties,  pertaining  generally to the expected
continuation of the Company's collaborative agreements,  the receipt of research
payments  thereunder,  the future  achievement of various  milestones in product
development and the receipt of payments related thereto,  the potential  receipt
of royalty  payments,  pre-clinical  testing and  clinical  trials of  potential
products,  the period of time the Company's existing capital resources will meet
its funding requirements,  and financial results and operations.  Actual results
could  differ  materially  from  those  anticipated  in  these   forward-looking
statements as a result of various  factors,  including those set forth below and
those  outlined in the Company's  1998 Annual Report on Form 10-K filed with the
Securities and Exchange Commission.


     OVERVIEW

     Since the  founding of the  Company in January  1992,  Neurocrine  has been
engaged in the discovery and  development of novel  pharmaceutical  products for
diseases  and  disorders  of the central  nervous and immune  systems.  To date,
Neurocrine  has not generated  any revenues from the sale of products,  and does
not expect to generate  any  product  revenues in the  foreseeable  future.  The
Company has funded its operations primarily through public offering and payments
under research and development agreements. The Company is developing a number of
products with corporate  collaborators and will rely on those  collaborators and
new  collaborators to meet funding  requirements.  Revenues are expected to come
from the Company's strategic  alliances.  The Company expects to generate future
net losses in  anticipation  of significant  increases in operating  expenses as
products are advanced through the various stages of clinical development.  As of
September  30,  1999,  Neurocrine  has  incurred a  cumulative  deficit of $38.0
million  and  expects  to incur  operating  losses in the  future,  which may be
greater than losses in prior years.


     RESULTS OF OPERATIONS

                 THREE MONTHS ENDED SEPTEMBER 30, 1999 AND 1998
                 ----------------------------------------------

    Revenues for the third  quarter of 1999 were $5.2  million  compared to $5.1
million for the respective  period in 1998.  The increase in revenues  primarily
resulted   from  the  1999   collaborations   with   Wyeth-Ayerst   and  Janssen
Pharmaceutica,  a subsidiary of Johnson & Johnson.  The  Wyeth-Ayerst  agreement
included a number of milestone  payments,  one of which was achieved  during the
third  quarter  earning a $750,000  payment in addition to  quarterly  sponsored
research  payments of  $750,000.  The Janssen  agreement  contributed  sponsored
research and  development  revenues of $1.7 million to third  quarter  revenues.
Revenues in 1998 included $2.1 million in sponsored  development  from NPI and a
$750,000 milestone payment from Novartis.

    Research and  development  expenses  increased to $8.3 million for the third
quarter  of 1999  compared  to $6.4  million  for the same  period in 1998.  The
increase  reflects higher costs associated with increased  scientific  personnel
and related  expenditures as the Company  advances its drug  candidates  through
clinical  testing.  Currently,  the  Company  has  five  compounds  in  clinical
development.

    General and  administrative  expenses  increased to $1.9 million  during the
third quarter of 1999 compared to $1.8 million for the same period in 1998.  The
increase resulted primarily from additional administrative  personnel,  business
development and professional  service expenses to support the expanded  clinical
development efforts.

<PAGE>

    Interest  income  decreased  to  $623,000  during the third  quarter of 1999
compared  to $1.2  million  for the same  period  last year.  The  decrease  was
primarily  due to a decline in  investment  balances.  The  Company  anticipates
further decline in interest income as cash reserves are used to fund progressive
clinical trials.

    Net loss for the third  quarter of 1999 was $4.4  million or $0.23 per share
compared  to $4.0  million  or $0.22  per  share  for the same  period  in 1998.
Increased revenues of $177,000 were used to finance the $2.0 million increase in
operating  expenses primarily related to clinical  development  costs.  Interest
income  declined  by  $551,000  and  non-cash  charges  relating  to NPI  equity
transactions decreased by $2.0 million.

    To  date,  the  Company's  revenues  have  come  from  funded  research  and
achievements of milestones under corporate collaborations. The nature and amount
of these revenues from period to period may lead to substantial  fluctuations in
the  results of  quarterly  revenues  and  earnings.  Accordingly,  results  and
earnings of one period are not predictive of future periods.


                  NINE MONTHS ENDED SEPTEMBER 30, 1999 AND 1998
                  ---------------------------------------------

    Revenues for the nine months  ended  September  30, 1999 were $12.6  million
compared to $11.5 million for the same period in 1998.  The increase in revenues
primarily  resulted from the 1999  collaborations  with Wyeth-Ayerst and Janssen
Pharmaceutica,  a subsidiary of Johnson & Johnson.  The  Wyeth-Ayerst  agreement
included a number of milestone  payments,  two of which were achieved  earning a
$1.5 million  payment in addition to quarterly  sponsored  research  payments of
$750,000.  The Janssen agreement  contributed sponsored research and development
revenues  of $1.7  million to third  quarter  1999  revenues.  Revenues  in 1998
included $2.1 million in sponsored development from NPI and a $750,000 milestone
payment from Novartis.

         Research and  development  expenses  increased to $21.9 million for the
nine months  ended  September  30, 1999  compared to $15.5  million for the same
period in 1998. The increase  reflects  higher costs  associated  with increased
scientific  personnel  and  development  costs as the Company  advances its drug
candidates  through  the  clinical  testing.  The  Company  currently  has  five
compounds in clinical development.

    General and  administrative  expenses  increased to $5.6 million  during the
nine  months  ended  September  30, 1999  compared to $4.7  million for the same
period last year.  The increase is  attributable  to  additional  administrative
personnel, business development and professional service expenses to support the
expanded clinical development efforts.

    During  1998,  the  Company  wrote-off  acquired   in-process  research  and
development  fees of $4.9  million.  Of that total,  $4.2 million were  non-cash
charges  relating to the  acquisition of NNL. The balance is attributable to the
in-licensing  of compounds  for insomnia and  glioblastoma.  Both  compounds are
currently in clinical development programs.

    Interest  income  decreased  to $2.2  million  during the nine months  ended
September 30, 1999  compared to $3.3 million for the same period last year.  The
decline in interest income resulted from lower investment balances.  The Company
anticipates further decline in interest income as cash reserves are used to fund
progressive clinical trials.

    Net loss for the nine months ended  September  30, 1999 was $13.1 million or
$0.69 per share compared to $13.2 million or $0.74 per share for the same period
in 1998.  During 1999,  increased  revenues of $1.1 million were used to finance
the $7.3 million increase in operating expenses related to clinical  development
and  administration.  Write-off of acquired  in-process research and development
costs and equity  transactions  related to NPI  decreased  by $7.5  million.  In
addition, the Company experienced a decline of $1.1 million in interest income.

    To  date,  the  Company's  revenues  have  come  from  funded  research  and
achievements of milestones under corporate collaborations. The nature and amount
of these revenues from period to period may lead to substantial  fluctuations in
the results of  year-to-date  revenues and  earnings.  Accordingly,  results and
earnings of one period are not predictive of future periods.

<PAGE>

     LIQUIDITY AND CAPITAL RESOURCES

     At September 30, 1999, the Company's cash, cash equivalents, and short-term
investments  totaled $48.5  million  compared with $62.7 million at December 31,
1998.  The decline in cash balances  during 1999  reflects the increased  losses
associated with the progressive  clinical  development programs and the addition
of scientific personnel.

     Net cash used in operating  activities during the first nine months of 1999
was $12.4 million  compared with $8.0 million for the same period last year. Net
cash used during  1999 and 1998  reflects  the  payment of clinical  development
expenses  and other  accrued  liabilities.  The  Company  anticipates  continued
funding of clinical trials to use cash in future periods.

     Net cash  provided by  investing  activities  during 1999 was $7.9  million
compared  with $8.7  million  during  1998.  The  increase in cash  provided was
primarily  the result of timing  differences  in the  investment  purchases  and
sales/maturities  and the  fluctuations  in the Company's  portfolio mix between
cash  equivalents  and  short-term  investment  holdings,  net of capital  asset
purchases of $2.0 and $3.1 million during 1999 and 1998, respectively.

     Net cash provided by financing activities during 1999 was $421,000 compared
to $2.0 million in 1998.  Cash provided by proceeds from Common Stock  issuances
and capital lease financing, net of payments on long-term obligations,  resulted
in net cash provided during 1999 and 1998.

     The Company  believes that its existing  capital  resources,  together with
interest income and future payments due under the strategic  alliances,  will be
sufficient to satisfy its current and projected  funding  requirements  at least
through the year 2001.  However,  no  assurance  can be given that such  capital
resources   and  payments  will  be  sufficient  to  conduct  its  research  and
development programs as planned. The amount and timing of expenditures will vary
depending upon a number of factors, including progress of the Company's research
and  development  programs.  Failure  of a  corporate  collaborator  to meet its
contractual  obligations  could have a material  adverse effect on the Company's
financial position and results of operations.


     INTEREST RATE RISK

     The  Company is exposed to changes in  interest  rates  primarily  from its
long-term debt. The Company believes that a hypothetical 100 basis point adverse
move in  interest  rates  along the entire  interest  rate yield curve would not
materially effect the fair value of interest sensitive financial instruments nor
the costs associated with the long-term debt.

      Interest  risk exposure on long-term  debt relates to the  Company's  note
payable which bears a floating  interest rate of prime plus one quarter  percent
(8.50% at September 30, 1999 and 8.00% at December 31,  1998).  At September 30,
1999 and  December  31,  1998,  the note  balance  was  $498,000  and  $610,000,
respectively. This note is payable in equal monthly installments through January
2003.


     IMPACT OF YEAR 2000

     The Year 2000 Issue is the result of computer  programs being written using
two digits rather than four to define the applicable  year. Any of the Company's
computer  programs or  hardware  that have  date-sensitive  software or embedded
chips may  recognize  a date  using "00" as the year 1900  rather  than the year
2000.  This  could  result  in  a  system  failure  or  miscalculations  causing
disruptions of operations,  including, among other things, a temporary inability
to process  transactions,  send invoices,  or engage in similar normal  business
activities.

<PAGE>

     In the normal course of business  over the past two years,  the Company has
made  incremental  modifications  and improvements to all of its operational and
financial software. An integral part of this process has been to ensure that all
newly purchased  software and hardware are Year 2000 compliant.  The Company has
completed an evaluation of all of the existing software and hardware used in its
internal systems and operations and is now Year 2000 compliant.  The Company has
also evaluated and replaced or remediated  various  hardware  components used in
its  laboratory  operations  and now believes it is Year 2000  compliant in this
area as well. In general,  the Company  management is satisfied with its efforts
to be Year2000  prepared,  however,  it will  continue  to monitor and  reassess
systems through the end of the year.

     Because third party  failures  could have a material  adverse impact on the
Company's  ability  to conduct  business,  the  Company  has  requested  written
assurances  from all material  customers  and vendors that their  systems are or
will be Year 2000 compliant.  The Company has received such assurances from many
of  its  domestic  material  customers  and  vendors  as  well  as  many  of its
international  customers and vendors;  however, this is an on-going process. The
business interruption of any of the Company's significant  customers,  materials
suppliers and service  providers  resulting  from their Year 2000 issues,  could
have a  material  adverse  impact  on the  Company's  revenues  and  results  of
operations.

     Based on information  obtained from third parties and on-going  evaluations
of the Company's own systems,  management  believes it has  identified  the most
reasonably  likely  worst  case  scenario  with  respect to  possible  losses in
connection with Year 2000 related problems.  Based on this scenario, the Company
has developed  contingency  plans for  restoration  of financial and  scientific
data,  replacement of material  suppliers and service providers and the building
of safety  stocks  of  critical  materials  in the event  that  current  vendors
experience Year 2000 compliance issues.

     The   incremental   cost  to  the  Company  of  Year  2000  compliance  was
approximately $175,000. The expensed costs do not include internal costs, as the
Company does not separately  track the internal  costs of Year 2000  compliance.
Such internal costs are  principally the related payroll costs for the Company's
information technology group.

     There are many factors  outside the Company's  control that could cause the
Year 2000 problem to seriously disrupt its operations.  However, the Company has
identified certain risks and has developed  contingency plans in order to reduce
its exposure in these areas. The scope of the Company's  efforts  regarding each
risk is limited to the  Company's  key products,  key  compounds,  subsidiaries,
critical suppliers, and major customers. The most critical of these risks are: a
disruption in the supply of product with particular  emphasis on failures of raw
material suppliers,  commercial partners,  and external  distribution  channels;
internal  infrastructure  failures such as utilities,  communications,  internal
information technology services and integrated information technology systems.

     The  information  above  contains  forward-looking   statements  including,
without  limitation,  statements  relating to the Company's  plans,  strategies,
objectives,  expectations,  intentions,  and  adequate  resources  that are made
pursuant to the "safe harbor"  provisions of the Private  Securities  Litigation
Reform Act of 1995. Readers are cautioned that forward-looking  statements about
the Year 2000 should be read in conjunction with the Company's disclosures under
the heading: "Caution on forward-looking statements".

     CAUTION ON FORWARD-LOOKING STATEMENTS

     The Company's business is subject to significant  risks,  including but not
limited  to, the risks  inherent in its  research  and  development  activities,
including the successful continuation of the Company's strategic collaborations,
the  successful  completion  of clinical  trials,  the  lengthy,  expensive  and
uncertain process of seeking regulatory approvals, uncertainties associated both
with the  potential  infringement  of patents  and other  intellectual  property
rights of third  parties,  and with  obtaining and enforcing its own patents and
patent rights, uncertainties regarding government reforms and of product pricing
and reimbursement  levels,  technological change and competition,  manufacturing
uncertainties  and  dependence on third parties.  Even if the Company's  product
candidates appear promising at an early stage of development, they may not reach
the market for numerous reasons. Such reasons include the possibilities that the
product will be  ineffective  or unsafe  during  clinical  trials,  will fail to
receive necessary  regulatory  approvals,  will be difficult to manufacture on a
large  scale,  will  be  uneconomical  to  market  or  will  be  precluded  from
commercialization by proprietary rights of third parties.

<PAGE>

     Neurocrine  will require  additional  funding for the  continuation  of its
research and product development programs, for progress with preclinical testing
and clinical  trials,  for  operating  expenses,  for the pursuit of  regulatory
approvals  for its  product  candidates,  for the costs  involved  in filing and
prosecuting  patent  applications and enforcing or defending  patent claims,  if
any, for the cost of product in-licensing and any possible acquisitions, and may
require  additional   funding  for  establishing   manufacturing  and  marketing
capabilities in the future. The Company may seek to access the public or private
equity markets  whenever  conditions  are  favorable.  The Company may also seek
additional funding through strategic  alliances and other financing  mechanisms,
potentially  including  off-balance  sheet financing.  There can be no assurance
that adequate funding will be available on terms  acceptable to the Company,  if
at all.  If  adequate  funds are not  available,  the Company may be required to
curtail  significantly  one or more of its research or  development  programs or
obtain funds through  arrangements with collaborative  partners or others.  This
may require the Company to relinquish  rights to certain of its  technologies or
product candidates.

     The Company believes that its existing  capital  resources will be adequate
to satisfy its current and planned operations through the year 2000.  Neurocrine
expects to incur  additional  operating  expenses over the next several years as
its research,  development,  preclinical  testing and clinical trial  activities
increase. To the extent that the Company is unable to obtain third party funding
for such expenses,  the Company  expects that increased  expenses will result in
increased losses from  operations.  There can be no assurance that the Company's
products under development will be successfully  developed or that its products,
if  successfully  developed,  will  generate  revenues  sufficient to enable the
Company to earn a profit.


     For a further  discussion of the risks associated with an investment in the
Company,  please see the section entitled "Risk Factors" in the Company's Annual
Report on Form 10-K filed with the  Securities  and Exchange  Commission for the
year ended December 31, 1998.



ITEM 3. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK.

     A discussion of the Company's  exposure to, and  management of, market risk
appears  in Part 1,  Item 2 of this  Quarterly  Report  on Form  10-Q  under the
heading "Interest Rate Risk".

<PAGE>
                           PART II: OTHER INFORMATION


ITEM 5.  OTHER INFORMATION

     The Company has been advised,  that due to personal  commitments,  Harry F.
Hixson, Jr. will be resigning from the Board of Directors effective December 31,
1999.  The Company has not  identified a replacement  director as of the date of
this report.


ITEM 6.  EXHIBITS AND REPORTS ON FORM 8-K

(A) Exhibits. The following exhibits are filed as part of this report:


    *10.1 Agreement  by  and  among  Dupont  Pharmaceuticals   Company,  Janssen
          Pharmaceutica, N.V. and Neurocrine Biosciences, Inc.

    *10.2 Amendment Number One to the Agreement between Neurocrine  Biosciences,
          Inc. and Janssen Pharmaceutica, N.V.

     27   Financial Data Schedule.
    ---------------

     *Certain  portions of this exhibit have been omitted  pursuant to a request
     for confidential treatment filed with the Commission.  The omitted portions
     have been filed separately with the Commission.


     Reports on Form 8-K.  During the quarter  ended  September  30,  1999,  the
Company filed no current reports on Form 8-K.



                                   SIGNATURES

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


 Dated: 11/12/99               /s/ Paul W. Hawran
                               Paul W. Hawran
                               Senior Vice President and Chief Financial Officer
                               (Principal Financial and Accounting Officer)



<PAGE>


                                  EXHIBIT INDEX


*10.1 Agreement   by  and   among   Dupont   Pharmaceuticals   Company,  Janssen
     Pharmaceutica, N.V. and Neurocrine Biosciences, Inc.

*10.2 Amendment Number One to the Agreement between Neurocrine Biosciences, Inc.
     and Janssen Pharmaceutica, N.V.

 27   Financial Data Schedule.
 ---------------

     *Certain  portions of this exhibit have been omitted  pursuant to a request
     for confidential treatment filed with the Commission.  The omitted portions
     have been filed separately with the Commission.




                          ***REDACTED FOR CONFIDENTIALITY***


                                    AGREEMENT

                                  BY AND AMONG

                         DUPONT PHARMACEUTICALS COMPANY

                           JANSSEN PHARMACEUTICA, N.V.

                                       AND

                          NEUROCRINE BIOSCIENCES, INC.



<PAGE>



                                        i
                   [***]  CONFIDENTIAL TREATMENT REQUESTED

                                TABLE OF CONTENTS

ARTICLE I - DEFINITIONS .....................................................2-8

ARTICLE II - LICENSE GRANTS ...................................................8
  2.1  Common Interest Patent Cross License....................................8
  2.2  Special Interest Patent Cross License...................................9
  2.3  Other Patent Licenses..................................................11
  2.4  Initial Payments License...............................................12

ARTICLE III - PRODUCT DEVELOPMENT AND COMMERCIALIZATION.......................13
  3.1  Independent Programs...................................................13
  3.2  No Diligence...........................................................13
  ***  ****************************...........................................**

ARTICLE IV - PAYMENTS ........................................................14
   4.1  License Fees Payable to DPC...........................................14
   4.2  Milestone Payments to DPC.............................................15
   4.3  Milestone Payments to Janssen.........................................16
   4.4  Milestone Payment Timing..............................................17
   4.5  DPC Earned Royalties for X-Products...................................18
   4.6  Janssen and Neurocrine Earned Royalties For Products..................19
   4.7  Term For Royalty Payment..............................................20
   4.8  Third Party Patents...................................................20
   4.9  Compulsory License....................................................21
   4.10 Currency Restrictions.................................................21
   4.11 Royalty Reports and Records...........................................21
   4.12 Taxes ................................................................23
   4.13 Neurocrine Receptor License Payment...................................23
   4.14 Janssen or Neurocine Obligation of Payment............................23

************************** ...................................................**
  ***   ****************************..........................................**
  ***   ****************************..........................................**
  ***   ****************************..........................................**
  ***   ****************************..........................................**
  ***   ****************************..........................................**
  ***   ****************************..........................................**

ARTICLE VI - RELEASE .........................................................27
  6.1  Release ...............................................................27
  6.2  General Release........................................................28
  6.3  No Admission...........................................................28
  6.4  Remedies ..............................................................29

<PAGE>
                                       iii
ARTICLE VII - CONFIDENTIALITY ................................................30
  7.1 Confidentiality; Exceptions.............................................30
  7.2 Authorized Disclosure...................................................31
  7.3 Survival ...............................................................31
  7.4 Public Announcements....................................................31

ARTICLE VIII - INTELLECTUAL PROPERTY .........................................32
  8.1 Ownership of Patents....................................................32
  8.2 Patent Filings on N-Compounds or N-Products.............................32
  8.3 Patent Filings..........................................................32
  8.4 Infringement by Third Parties...........................................34
  8.5 Defense and Settlement of Third Party Claims............................35
  8.6 Patent Assignment.......................................................36
  8.7 Notices Relating to the Act.............................................36
  8.8 Authorization Relating to Patent Term Extension.........................36

ARTICLE IX - INDEMNIFICATION .................................................37
  9.1 Indemnification.........................................................37
  9.2 Procedure...............................................................38

ARTICLE X - TERM AND TERMINATION .............................................38
  10.1 Term ..................................................................38
  10.2 Material Breach .......................................................38
  10.3 Bankruptcy.............................................................39
  10.4 Survival ..............................................................40

ARTICLE XI - DISPUTE RESOLUTION ..............................................41
  11.1 Dispute Resolution and Arbitration.....................................41
  11.2 Arbitration............................................................41

ARTICLE XII - REPRESENTATIONS AND WARRANTIES; EXCLUSIVITY.....................41
  12.1 Representations and Warranties.........................................41
  12.2 Patent Warranties......................................................42
  12.3 Exclusivity............................................................42

ARTICLE XIII MISCELLANEOUS ...................................................43
  13.1 Relationship of Parties................................................43
  13.2 Counterparts...........................................................43
  13.3 Headings ..............................................................43
  13.4 Binding Effects........................................................43
  13.5 Assignment.............................................................43
  13.6 Amendment and Waiver...................................................43
  13.7 Governing Law..........................................................44
  13.8 Severability...........................................................44
  13.9 Entire Agreement.......................................................44

<PAGE>
  13.10 Advise of Counsel.....................................................44
  13.11 Consents Not Unreasonably withheld....................................44
  13.12 Retained Rights.......................................................44
  13.13 Force Majeure.........................................................45
  13.14 Further Actions.......................................................45
  13.15 No trademark Rights...................................................45
  13.16 Notices ..............................................................45
  13.17 Waiver ...............................................................47
  13.18 Compliance with Laws..................................................47

EXHIBIT A - DISPUTE RESOLUTION

<PAGE>
                                        1

                                    AGREEMENT
This  Agreement is made  effective as of the 28th day of September,  1999 by and
among DuPont  Pharmaceuticals  Company, a Delaware general  partnership having a
principal place of business at 974 Centre Road,  Wilmington,  Delaware  ("DPC"),
Neurocrine Biosciences,  Inc., a Delaware corporation having its principal place
of business at 10555 Science Center Drive,  San Diego,  CA 92121  ("Neurocrine")
and Janssen  Pharmaceutica,  N. V., a Belgium  corporation  having its principal
place of business at Turnhoutseweg 30, 2340 Beerse,  Belgium  ("Janssen").  DPC,
Neurocrine  and  Janssen  are  each  referred  to by  name or as a  "Party"  or,
collectively, as "Parties".

     RECITALS  WHEREAS,  The Parties each have on-going research in the field of
corticotropin-releasing  factor (CRF)  receptor  antagonists  and have developed
certain technology in this field.

     WHEREAS,  the  Parties  each  have  an  interest  in  various  intellectual
properties  in the  field of CRF  receptor  antagonists  which  is a  source  of
potential dispute among them.

     WHEREAS, the Parties desire to settle potential disputes by the exchange of
certain rights and obligations  hereunder.  NOW, THEREFORE,  in consideration of
the  premises  and mutual  covenants  herein  contained,  and for other good and
valuable  consideration,  the  receipt  and  sufficiency  of  which  are  hereby
acknowledged, the Parties hereto agree as follows:

<PAGE>
                                       21

                     [***] CONFIDENTIAL TREATMENT REQUESTED

                                    ARTICLE I
                                   DEFINITIONS
         The terms in this Agreement with initial letters  capitalized,  whether
used in the  singular or the plural,  shall have the meaning set forth below or,
if not listed below, the meaning designated in places throughout this Agreement.

     1.1 "Affiliate" means an individual,  trust, business trust, joint venture,
partnership,  corporation,  association  or any other entity which  (directly or
indirectly) is controlled by,  controls or is under common control with a Party.
For the  purposes  of this  definition,  the  term  "control"  (including,  with
correlative meanings,  the term "controlled by" and "under common control with")
as used with  respect to any Party,  shall mean the  possession  of the power to
direct or cause the  direction  of the  management  and  policies  of an entity,
through the  ownership of the  outstanding  voting  securities or by contract or
otherwise.

1.2 "Control"  means  possession of the ability to grant a license or sublicense
as provided for herein  without  violating  the terms of any  agreement or other
arrangements with a Third Party.

***      **************************************************************.

1.4 "Date of First Sale" means, on a Product-by-Product basis, the date on which
a  Party  (or an  Affiliate  or a  Sublicensee)  first  sells  a  Product  to an
unaffiliated  Third Party in an arms  length  commercial  transaction.  1.5 "DPC
X-Patents" means the rights granted by any governmental authority under a Patent
derived from *********** and any counterparts  thereof,  and  additionally,  the
rights  granted  by any  governmental  authority  under a  Patent  which  claims
***********************  ***************************,  which  Patent is owned or
Controlled by DPC at any time.

<PAGE>

1.6      "Effective Date" means the date first written above.

1.7      "EMEA" means the European Medical Evaluation Agency.

1.8 "FDA" means the United States Food and Drug  Administration or any successor
agency.

1.9 "Field" means the discovery,  synthesis,  and selection of  X-Compounds  and
N-Compounds and the  manufacture,  development  and use of Products.  1.10 "IND"
means an  investigational  new drug application for a Product filed with the FDA
as more fully defined in 21 C.F.R.
ss.312.3 or its equivalent in any country.

1.11  "Information"  means  information,  generally  not  known  to the  public,
relating  to  the  Field  and   including   screening   data,   pharmacological,
toxicological,  clinical test data and analytical data. 1.12 "Janssen X-Patents"
means the rights granted by any  governmental  authority  under a Patent derived
from  *********** and any counterparts  thereof,  and  additionally,  the rights
granted   by  any   governmental   authority   under  a  Patent   which   claims
***********************  ***************************,  which  Patent is owned or
Controlled by Janssen at any time.

1.13 "Major European Country" means France, Germany or the United Kingdom.

1.14  "N-Compounds"  means  those  compounds  which,  as  compounds  or chemical
entities,    are    specifically   or   generically    within   the   scope   of
****************************************   and  includes   those   compounds  as
described     in     the     disclosure     of     ***********     and     shown
***************************************************.

1.15 "NDA" means a New Drug  Application and all  supplements  filed pursuant to
the requirements of the FDA, including all documents, data and other information
concerning  Product  which are  necessary  for or included  in, FDA  approval to
market a Product as more fully defined in 21 C.F.R. ss.314.50 et. seq.

<PAGE>

***    *************************************************************************
***************************************.

1.17  "Net  Sales"  means  the  amount  billed  by a Party  or an  Affiliate  or
Sublicensee  for  sales of a  Product  to a Third  Party  less:  (a)  discounts,
including cash discounts,  discounts to managed care or similar organizations or
government  organizations,  rebates paid,  credited,  accrued or actually taken,
including  government  rebates  such as Medicaid  chargebacks  or  rebates,  and
retroactive price reductions or allowances  actually allowed or granted from the
billed  amount,   and  commercially   reasonable  and  customary  fees  paid  to
distributors  (other than to a distributor that is an Affiliate of a Party), (b)
credits or  allowances  actually  granted upon claims,  rejections or returns of
such sales of Products, including recalls, regardless of a Party requesting such
recalls, (c) freight,  postage, shipping and insurance charges paid for delivery
of such Product,  to the extent billed separately on the invoice and paid by the
buyer, and (d) taxes, duties or other governmental charges levied on or measured
by the billing  amount  when  included in  billing,  as  adjusted  for  rebates,
charge-backs  and refunds and (e) provisions for actual  uncollectible  accounts
determined in accordance  with U.S.  generally  accepted  accounting  practices,
consistently  applied to all products of a Party. Where a Product is sold in the
form of a  combination  Product  containing  one or more active  ingredients  in
addition to an X-Compound or N-Compound,  Net Sales for such combination Product
will be calculated by multiplying  actual Net Sales of such combination  Product
by the  fraction  A/(A+B)  where A is the  invoice  price  of the  X-Product  or
N-Product if sold  separately in the same dose, and B is the total invoice price
of any other active component or components, or devices, in the combination,  if
sold separately in

<PAGE>

     the  same  dose.  If,  on a  country-by-country  basis,  the  other  active
component or components in the  combination  are not sold separately in the same
dose in said country, Net Sales for the purpose of determining  royalties of the
combination  Product shall be calculated by multiplying actual Net Sales of such
combination  Product by the  fraction  A/C where A is the  invoice  price of the
Product,  if sold separately in the same dose, and C is the invoice price of the
combination Product. If, on a country-by-country  basis, neither the Product nor
the other active  component or  components  of the  combination  Product is sold
separately  in the same dose in said  country,  Net Sales  for the  purposes  of
determining  royalties of the  combination  Product  shall be  determined by the
Parties by mutual agreement.

1.18     "N-Product" means a Product comprised of an N-Compound.

1.19  "Neurocrine  N-Patents"  means  the  rights  granted  by any  governmental
authority under a Patent derived from ************ and any counterparts thereof,
and  additionally,  the rights  granted by any  governmental  authority  under a
Patent which claims ******************** *************************, which Patent
is owned or Controlled by Neurocrine at any time.

1.20  "Neurocrine  Receptor  License"  means the license  granted to  Neurocrine
pursuant                                  to                                 the
********************************************************************************
**************************, including rights under ************************.

1.21  "Neurocrine  X-Patents"  means  the  rights  granted  by any  governmental
authority under a Patent derived from *********** and any counterparts  thereof,
and  additionally,  the rights  granted by any  governmental  authority  under a
Patent which claims ***********************  ***************************,  which
Patent is owned or Controlled by Neurocrine at any time.

<PAGE>

********************************************************************************
********************************************************************************
*******************************.

1.23  "Patent"  means (i) valid and  enforceable  letters  patent  including any
extensions,  registration,   confirmation,  reissue,  continuation,  divisional,
continuation-in-part,  re-examination,  or  renewal  thereof,  and (ii)  pending
applications  for letters patent.

1.24 "Patent Costs" means the reasonable fees and expenses paid to outside legal
counsel and other Third Parties, and filing and maintenance  expenses,  incurred
in connection  with the  establishment  and maintenance of rights under Patents.

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

****  **************************************************************************
***********************************************************************.

1.26 "Phase II" means that  portion of the  clinical  development  program for a
Product which  provides for an indication of the dosage  regimen in patients and
as an initial  assessment of efficacy and safety  required as more fully defined
in 21 C.F. R.
312.21(b).

1.27 "Phase III" means that  portion of the clinical  development  program for a
Product  which  provides for large scale  clinical  studies  intended as pivotal
trials for regulatory  filings  conducted in a sufficient  number of patients to
establish  Product clinical efficacy for one or more indications and its safety,
as more fully defined in 21 C.F.R.  312.21 (c).

1.28 "Product" means any form or dosage of a compound for  pharmaceutical use in
humans or other  animals or for use as a  diagnostic  tool that  consists  of an
X-Product or N-Product, as the case may be.

<PAGE>

***  ***************************************************************************
*************************************************.

1.30 "Regulatory  Approval" means all official approvals by government,  pricing
or health  authorities  in a  country  (or  --------------------  super-national
organizations,  such as the  EMEA)  which  are  required  for first use or sale,
including, importation,  manufacture (where manufacture is required), pricing or
reimbursement of a pharmaceutical product in such country where required.

1.31 "Sublicensee" means, with respect to a particular Product, a Third Party to
whom a Party has granted a license or sublicense  -----------  under any Patents
to make,  use and sell such Product.  As used in this  Agreement,  "Sublicensee"
shall  also  include  a Third  Party to whom a Party  has  granted  the right to
distribute  a  Product,  provided  that  such  Third  Party is  responsible  for
marketing and promotion of such Product within its distribution territory.

1. 32 "Third  Party"  means any  entity  other  than a Party  hereto,  excepting
Affiliates of a Party. -----------

1.33 "X-Compounds" means compounds which, as compounds or chemical entities, are
specifically  or  generically   within  the  published   -----------  claims  of
*********** or which are specifically or generically within the published claims
of   *****************************************   having   the   following   base
structure:  **********************  ************.  For clarity and in accordance
with the foregoing,  an "X-Compound" is not and does not include those compounds
described                *******************************************************
********************************.

1.34     "X-Product" means a Product comprised of an X-Compound.

<PAGE>

1.35 "Valid  Patent  Claim"  means a claim in any  unexpired  Patent,  which has
matured into an issued patent which has not been held invalid by a  non-appealed
or  unappealable  decision  by a court or other  appropriate  body of  competent
jurisdiction. The scope of a Valid Patent Claim shall be limited to its terms as
set forth in the Patent itself and as further defined by any court,  body or law
of competent jurisdiction. For the purpose of royalty determination and payment,
any claim being prosecuted in a pending patent application shall be deemed to be
the equivalent of a Valid Claim of an issued,  unexpired patent,  provided it is
not pending for greater  *********  ********* from the filing date of the patent
application  in which case it shall  cease  being a Valid Claim until the patent
issues,  provided  further that in the case of  interference  proceedings in the
United States,  ******************  period will be extended until the completion
of the interference.

                                   ARTICLE II
                                 LICENSE GRANTS

2.1  Common  Interest  Patent Cross License.

(a)  DPC.  DPC grants to Janssen and  Neurocrine,  separately,  a  non-exclusive
     worldwide  license  under  any  Patent  derived  from  ***********  and any
     counterparts  thereof,  to make, have made, use, sell,  offer to sell, have
     sold and import  X-Compounds  and  X-Products.
(b) Janssen and Neurocrine.
     Janssen and Neurocrine,  separately, grant to DPC a non-exclusive worldwide
     license in and to their  respective  rights  under any Patent  derived from
     *********** and any  counterparts  thereof,  to make, have made, use, sell,
     offer to sell, have sold and import X-Compounds and X-Products.

<PAGE>
(c)  Sublicenses.  The licenses of this paragraph are without the right to grant
     sublicenses except to the license grantor. -----------

2.2        Special         Interest         Patent        Cross         License.
- -----------------------------------------------

(a)  DPC.  Janssen  and  Neurocrine,  separately,  grant  to  DPC  an  exclusive
     worldwide  license,  with  a  right  to  grant  sublicenses,   under  their
     respective rights in and to the Janssen X-Patents and Neurocrine  X-Patents
     and under their  respective  interests in DPC X-Patents to make, have made,
     use, sell, offer for sale, have sold and import certain X-Compounds,  which
     X-Compounds          contain          *************************************
     *************************************  as in formula ****************** and
     formula  ******  ************  where  such   *************************   is
     otherwise  ****************************************  otherwise specifically
     do  not   include   a   total   of   ********   compounds   which   may  be
     *********************************************************************** and
     provided   that  said   specifically   ************************   were  not
     previously*************************************************************  or
     which may be ********  *************************  after  ************** and
     before  ***********  ******  *********************  and provided  that said
     specifically         named         ****************         were        not
     **************************************   in   a   written   record   before
     **********************.

(b)  Janssen and Neurocrine.  DPC grants to Janssen and Neurocrine,  separately,
     co-exclusive worldwide licenses, with the right to grant sublicenses, under
     DPC X-Patents and under DPC's interest in Janssen  X-Patents and Neurocrine
     X-Patents  to make,  have made,  use,  sell,  offer to sell,  have sold and
     import X-Compounds, which X-Compounds

<PAGE>
     do  not  contain   ********************************************************
     ******************* as in formula  ****************** and formula *********
     ******** where such *********************** is otherwise ******************
     *********************  otherwise  specifically  include a  total***********
     compounds                             which                             may
     be********************************************************************* and
     provided   that   said   specifically   ***********************   were  not
     ****************************************************************
     ************  or  which  may  be  **********************************  after
     ******   ************************************************************   and
     provided   that   said   *************************************   were   not
     *********************************************************************** and
     in  accordance  with  the  foregoing,  DPC does not  grant  to  Janssen  or
     Neurocrine a license  (exclusive or  non-exclusive)  to any subject  matter
     disclosed or claimed in  ************************************* or otherwise
     as shown in formula ****************************************.

(c)  Program  Patents.  DPC X-Patents  licensed to Janssen and Neurocrine  under
     this  Article  will be  considered  by Janssen  and  Neurocrine  a "Program
     Patent"  under the  agreement  between  Janssen  and  Neurocrine  effective
     January 1, 1995 for the purpose of  determining  the rights therein and the
     obligations  therefor as between  Janssen and  Neurocrine  only.  2.3 Other
     Patent Licenses.

<PAGE>
(a)  Neurocrine  N-Patents.  Neurocrine  grants  to DPC an  exclusive  worldwide
     license, with a right to grant sublicenses, under the Neurocrine N-Patents,
     to make,  have made,  use,  sell,  offer to sell and import  N-Compounds or
     N-Products.

(b)  Neurocrine  Receptor License.  At the election of DPC, Neurocrine agrees to
     grant and will grant to DPC, by way of sublicense, a non-exclusive license,
     with no right to grant sublicenses,  under the Neurocrine Receptor License,
     to ************************** ************************ This sublicense will
     terminate  ******************  unless  extended by mutual  agreement and is
     fully  paid-up  with  respect to license  fees and patent  prosecution  and
     maintenance expenses following provision by DPC of the payment specified in
     Section  4.13(i).  In the event DPC wishes to exercise its right to receive
     such a sublicense,  DPC must notify  Neurocrine of such election in writing
     within by no later than **************************************************.
     Following the Effective Date, DuPont may request that Neurocrine deliver to
     DPC the  relevant  terms,  with  appropriate  substantiation,  under  which
     Neurocrine has received the Neurocrine  Receptor  License.  Neurocrine will
     deliver the relevant terms, with appropriate substantiation, within 30 days
     of   the   date   of  the   request.   Neurocrine   and   DPC   will   then
     ****************************************************,    Neurocrine    will
     provide a sublicense  to DPC and DPC will agree to pay  royalties and other
     amounts payable *********************************** ***********************
     in    accordance     with    the    terms    of    such    sublicense    to
     **********************************************************   by  reason  of
     DPC's exploitation of the sublicense. In any event,

<PAGE>

     DPC will not be obligated to pay the Third Party licensor or Neurocrine for
     acts     under     such     license     or     sublicense     any    amount
     ***********************************************************************
     with respect to equivalent acts.

2.4 Initial  Payments  License.  In the event that  Janssen  elects to avoid any
obligation of payment to DPC required under  sub-paragraph  4.1(b), then Janssen
agrees  (and  Neurocrine  approves  and  consents  to the  extent  that any such
approval or consent  are  necessary)  that DPC may,  at its option,  assume from
Janssen all of Janssen's rights and obligations ************** which are held or
owed by Janssen  at the time  Janssen  notified  DPC of its intent to avoid such
payment and which are held or owed by Janssen **************************. In the
event DPC  exercises  this right,  Neurocrine  hereby agrees to cooperate to the
extent reasonably necessary to permit DPC to assume such rights and obligations.
DPC may exercise this right of assumption  by written  notice to Janssen  within
ninety (90) days  following  DPC's receipt of the notice of Janssen's  intent to
avoid payment pursuant to sub-paragraph  4.1(b).  Upon exercise of this right of
assumption,  DPC will assume all of Janssen's  rights and  obligations  relating
specifically *******************************************************************
********************************************************************************
**********************************************************************.      For
clarification,  the  future  development  and  marketing  efforts  of  DPC  with
Neurocrine  and  Janssen  with  Neurocrine  will be  considered  as  independent
relationships  with all rights and obligations being  independently  determined.
Specifically, the **************************************************************
*************************************************************   will   have   no
effect   on   the   other   rights   and    obligations    of   Janssen    *****
*************************************  and the further  development  and sale of
compounds by Janssen and Neurocrine will have no effect

<PAGE>

on   the   rights   and    obligations    of   DPC   under   the    portion   of
*****************************************.

                                   ARTICLE III
                    PRODUCT DEVELOPMENT AND COMMERCIALIZATION

3.1  Independent  Programs.  Unless  otherwise  specifically  stated  herein  or
provided  for  elsewhere,   each  Party's  efforts  to  identify,   develop  and
commercialize  Products are separate and independent  efforts.  Unless otherwise
specifically stated herein or provided for elsewhere,  there is no obligation or
right of the Parties herein to consult, collaborate or exchange information.

3.2 No diligence. Unless provided for by separate agreement between the Parties,
no research, development or commercialization diligence or efforts are agreed to
or required by the Parties hereunder. All business decisions, including, but not
limited to, the design,  sale,  price and promotion of X-Products and N-Products
under  this  Agreement  and the  decisions  whether  to  market  or  discontinue
marketing  any  particular  X-Product  or  N-Product  shall be  within  the sole
discretion of the marketing Party. Any marketing of an X-Product or N-Product in
one market or country  shall not  obligate  the  marketing  Party to market said
Product  in any other  market  or  country.  Furthermore,  the  Parties  make no
representation  or warranty that the marketing of an X-Product or N-Product,  as
the case may be, shall be the exclusive means by which a Party will  participate
in any therapeutic  field.  ****************************************************
********************************************************************************
********************************************************************************
********************************************************************************
*********************
<PAGE>

********************************************************************************
********************************************************************************
********************************************************************************
**********************************************************************.


                                  ARTICLE IV **
                                   PAYMENTS **
<PAGE>

In  consideration  of the  assignments,  rights and licenses  granted under this
Agreement,  the  Parties  agree to pay each other as follows:

4.1 License  Fees Payable to DPC.

(a)  Initial  Payment.  Within  thirty  (30)  days  after  the  Effective  Date,
     **************** ------------------- *********************************. (b)
     Subsequent     Payments.      *********************************************
     ***********************************************************************
     ****************************************************  may avoid any payment
     under  this  subparagraph  by  notifying  *** of its  intent to avoid  such
     payment       and       warranting       to        ************************
     ***********************************************************************  so
     long as the payment is not made by no later than the  payment due date.  No
     further amounts will be payable under this subparagraph

(b)  and DPC will be entitled to exercise it option under  Paragraph  2.4 above.
     In the event  Janssen  shall have  terminated  or  forfeited  its rights to
     develop  and  commercialize   X-Products  in  favor  of  Neurocrine,   then
     Neurocrine  will be solely  responsible  for the  warranty  made under this
     sub-Paragraph.  4.2 Milestone  Payments to DPC.  Janssen agrees to make the
     following payments to DPC upon the first occurrence of each milestone event
     for the first  *********************  developed by Janssen, its Affiliates,
     or  Sublicensees  during the term of this  Agreement.  Janssen shall not be
     required to make any milestone payment for **********************  once the
     applicable milestone payment has been paid for *********************. If an
     **********  is dropped  from  development  by  Janssen  and  replaced  with
     ******************  (a  ************************),  Janssen  shall  not  be
     obligated to make the same milestone

<PAGE>

     payments for the  **********************  as it already made in  connection
     with the ********** which was replaced. Except as specifically provided for
     below, it is understood that in no event shall Janssen be obligated to make
     the payment due on any  milestone  more than once with  respect to the same
     **********  (or its  **********************),  regardless  of the number of
     indications for which such ********** is developed.

- --------------------------------------------------------------------------------
Milestone                                                             Payment
- --------------------------------------------------------------------------------
Filing and acceptance for review of an IND
 or its equivalent in any Major European Country                    $***********

Enrollment of the fifth patient in a Phase II
 clinical trial or its equivalent in any country                    $***********

Enrollment of the fifth patient in a Phase III
 clinical trial or its equivalent in any country                    $***********

Filing and acceptance for review of a U. S. NDA                     $***********

Regulatory Approval in the U. S. for a first indication             $***********

Regulatory Approval in any Major European
 Country or by the EMEA                                             $***********

Regulatory Approval in the U. S. of each additional indication      $***********



4.3 Milestone Payments to Janssen.  DPC agrees to make the following payments to
Janssen and/or Neurocrine, as the case may be, upon the first occurrence of each
milestone    event   for   the    first    ************************************,
collectively, developed by DPC, its Affiliates, or Sublicensees, during the term
of this  Agreement.  Payments  for  ***********  shall  be made to  Janssen  and
payments *************** shall be made to Neurocrine.  DPC shall not be required
to make any milestone payment for subsequent *********** or
***********

<PAGE>

once    the    applicable     milestone    payment    has    been    paid    for
***************************  ********. If an ************************ is dropped
from      development      by     DPC     and     replaced      with     another
****************************************************                          or
"**********************"), DPC shall not be obligated to make the same milestone
payments for the  ********************** or ********************** as it already
made in connection with the ************************  which was replaced. Except
as specifically  provided for below, it is understood that in no event shall DPC
be  obligated  to make the  payment  due on any  milestone  more  than once with
respect to the same  ***********************************************************
*****************************************,  regardless  of the
*********************  ************************************.  For clarification,
**********************  shall be  considered to form a single group of compounds
for the determination of amounts due under this Paragraph.

- --------------------------------------------------------------------------------
Milestone                                                            Payment
- --------------------------------------------------------------------------------
Filing and acceptance for review of an IND or its
 equivalent in any Major European Country                           $***********

Enrollment of the fifth patient in a Phase II
 clinical trial or its equivalent in any country                    $***********

Enrollment of the fifth patient in a Phase III
 clinical trial or its equivalent in any country                    $***********

Filing and acceptance for review of a U. S. NDA                     $***********

Regulatory Approval in the U. S. for a first indication             $***********

Regulatory Approval in any Major European
 Country or by the EMEA                                             $***********

Regulatory Approval in the U. S. of each
 additional indication                                              $***********


<PAGE>

4.4 Milestone  Payment  Timing.  The Party  achieving any milestone  event shall
promptly give notice to the Party  receiving  payment that a milestone event has
been achieved and a milestone payment earned under Paragraphs 4.2 or 4.3 hereof.
The payments set forth in  Paragraphs  4.2 and 4.3 shall each be due and payable
by the paying Party within thirty (30) days of receipt of such notice,  provided
however,  that in the event any of the milestone  events have occurred  prior to
the Effective  Date,  said  milestone  payments  shall be due and payable within
thirty (30) days of the Effective Date. 4.5 DPC Earned Royalties For X-Products.
On a  Product-by-Product  basis,  Janssen shall pay DPC a royalty,  based on Net
Sales of X-Products  sold by or for Janssen,  or its Affiliates or  Sublicensees
according to the following schedule:

(a)  for Net Sales in the United States (its territories and possessions)  only,
     where a Valid  Patent  Claim on a  composition  of  matter  exists in a DPC
     X-Patent  or any Patent  derived  from  ************  and any  counterparts
     thereof that covers the sale or use of an X-Product;

- ------------------------------------------------------------ --------------
Annual U. S. Net Sales                                       Royalty Rate
- ------------------------------------------------------------ --------------
Less that ***********                                        ***********

From ***********                                             ***********

Greater than ***********                                     ***********


(b)  for all  consolidated  Net Sales outside the United States (its territories
     and  possessions),  where a Valid Patent Claim on a  composition  of matter
     exists in a DPC  X-Patent or any Patent  derived from  ***********  and any
     counterparts thereof that covers the sale or use of an X-Product;


<PAGE>

- ------------------------------------------------------------ --------------
Annual ex-U. S. Net Sales                                    Royalty Rate
- ------------------------------------------------------------ --------------

Less that ***********                                        ***********

From ***********                                             ***********

From ***********                                             ***********

Greater than ***********                                     ***********


The royalties  payable under  Section  4.5(a) are paid to DPC  regardless of the
*******************************************************************************.

4.6  Janssen and  Neurocrine  Earned  Royalties  For  Products.  On a Product by
Product basis, DPC shall pay Janssen a royalty, based on Net Sales of X-Products
and Neurocrine a royalty based on Net Sales of N-Products sold by or for DPC, or
its Affiliates or Sublicensees according to the following schedule:

(a)  for Net Sales in the United States (its territories and possessions)  only,
     where  a  Valid  Patent  Claim  on a  composition  of  matter  exists  in a
     Neurocrine N-Patent,  Neurocrine  X-Patent,  Janssen X-Patent or any Patent
     derived ********* ****** and any counterparts  thereof that covers the sale
     or use of an X-Product or N-Product;

- ------------------------------------------------------------ ---------------
Annual U. S. Net Sales                                       Royalty Rate
- ------------------------------------------------------------ ---------------

Less that $***********                                       ***********

From ***********                                             ***********

Greater than ***********                                     ***********

<PAGE>

(b)  for all  consolidated  Net Sales outside the United States (its territories
     and  possessions),  where a Valid Patent Claim on a  composition  of matter
     exists in which Janssen or  Neurocrine  have rights and that covers sale or
     use of an X-Product or N-Product;

- ------------------------------------------------------------ ---------------
Annual ex-U. S. Net Sales                                    Royalty Rate
- ------------------------------------------------------------ ---------------

Less that $***********                                       ***********

From $***********                                            ***********

From $***********                                            ***********

Greater than $***********                                    ***********


The  royalties   payable  under  Section  4.6(a)  are  paid  regardless  of  the
*******************************************************************************.

4.7 Term For Royalty  Payment.  Royalties  payable under  Paragraphs 4.5 and 4.6
shall be paid on a country-by-country, Product-by-Product basis from the Date of
First Sale until the  expiration of the last to expire of any Janssen  X-Patent,
Neurocrine  X-Patent,  DPC X-Patent and/or Neurocrine N-Patent including a Valid
Patent  Claim on a  composition  of matter  that  covers the sale or use of such
Product. For clarification,  the royalty rates are applicable to the incremental
Net Sales with which they are associated only, so that, for example, the highest
royalty  rate is  applicable  to  those  incremental  Net  Sales  in  excess  of
$***********  only.  For further  clarification,  no royalty is due in countries
where there is no Valid  Patent Claim that covers the sale or use of the Product
and Net Sales therein are not included in any calculation of royalty due.

<PAGE>

4.8 Third  Party  Patents.  In the event  that  during  the term of the  royalty
obligation  for a Product  under this Article IV, a Third Party shall  control a
Patent or  Patents in any  country  covering  the sale of a Product,  and in the
reasonable  judgment of the Party selling such Product  pursuant to the licenses
granted hereunder,  it would be impractical or impossible for such Party (or its
Affiliates or Sublicensees) to continue to sell the Product without  obtaining a
royalty bearing license from such Third Party, then such Party shall be entitled
to a credit  against the royalties due hereunder with respect to such country an
amount equal to *********** of the royalty paid to such Third Party, said credit
not to exceed *********** of the royalty rate due under this Agreement,  arising
from the sale of the Product in said  country.  By way of  example,  in no event
shall a  ***********  royalty  rate  be less  than  ***********

4.9  Compulsory  License.  If at any time and from time to time a Third Party in
any country shall, under the right of a compulsory license granted or ordered to
be granted by a competent  governmental  authority,  manufacture,  use or sell a
Product with respect to which royalties would be payable  pursuant to Paragraphs
4.5 or 4.6 hereof,  manufacture,  use or sale of such Product by the Third Party
shall not be considered  sales by a Sublicensee  hereunder.  The Party by whom a
royalty  would have been payable and the Party to whom a royalty would have been
payable  under  Paragraph  4.5 or 4.6,  shall each be entitled to fifty  percent
(50%) of the compulsory royalty payable by said Third Party as consideration for
the compulsory license.

4.10 Currency  Restrictions.  Except as herein provided in this  Paragraph,  all
royalties shall be paid in U.S.  Dollars.  If, at any time,  legal  restrictions
prevent the prompt  remittance of part of or all  royalties  with respect to any
country  where  Products  are sold,  the paying  Party  shall have the right and
option to make such payments by depositing  the amount thereof in local currency
to the receiving Party's accounts in a bank or depository in such country.


<PAGE>


                                                                  22

4.11 Royalty Reports and Records.

(a)  Reports.  During the term of this Agreement and commencing with the Date of
     First Sale of  Product,  the paying  Party  shall  furnish,  or cause to be
     furnished  to the  receiving  Party,  written  reports,  including  royalty
     payment due,  within  sixty (60) days  following  the end of each  calendar
     quarter  for which  royalties  are due,  showing:  (i) the Net Sales of all
     X-Products or N-Products  sold by the paying Party,  its Affiliates and its
     Sublicensees,  during the calendar  quarter;  (ii)the  royalties payable in
     U.S.  Dollars,  which shall have  accrued  hereunder in respect to such Net
     Sales;  (iii) the exchange rates used, if any, in determining the amount of
     U.S. Dollars;  and (iv) any withholding taxes required to be paid from such
     royalties.
(b)  Currency.  All  payments  to be made by the paying  Party to the  receiving
     Party shall be made in U.S. Dollars,  except as provided in Paragraph 4.10.
     In the case of sales outside the United States,  royalty  payments shall be
     converted to U.S.  Dollars in accordance  with the paying  Party's  current
     customary and usual procedures for calculating  same.
(c)  Audit. The paying Party shall maintain  complete and accurate  records,  in
     accordance with U.S. generally  accepted  accounting  practices,  which are
     relevant to costs,  expenses and  payments  under this  Agreement  and such
     records shall be open during reasonable  business hours for a period of two
     (2) years from  creation  of  individual  records  for  examination  at the
     receiving  Party's  expense  and not more  often  than  once each year by a
     certified public accountant or other representative selected by the


<PAGE>
                                                                  30
                        [***]  CONFIDENTIAL TREATMENT REQUESTED

     receiving  Party and acceptable to the paying Party for the sole purpose of
     verifying  the  correctness  of  calculations  or such  costs,  expenses or
     payments   made  under  this   Agreement.   In  the   absence  of  material
     discrepancies  (in  excess  of  five  percent  (5%))  in  any  request  for
     reimbursement  resulting from such audit,  the accounting  expense shall be
     paid by the  receiving  Party.  If material  discrepancies  do result,  the
     paying  Party  shall bear the  reasonable  audit  expense.  Any  records or
     accounting information received from the paying Party shall be Confidential
     Information for purposes of Article VII.

4.12 Taxes. The Party receiving  royalties shall pay any and all taxes levied on
account of royalties it receives  under this  Agreement.  If laws or regulations
require  that taxes be  withheld,  the paying  Party will (i) deduct those taxes
from  otherwise  remittable  royalty,  (ii)  timely  pay the taxes to the proper
taxing authority,  and (iii) send proof of payment to the receiving Party within
thirty (30) days of receipt of  confirmation of payment from the relevant taxing
authority.

4.13  Neurocrine  Receptor  License  Payment.  In the event  that DPC  elects to
receive a sublicense under the Neurocrine Receptor License, (i) in consideration
for ***************************************************************************,
DPC  shall pay  Neurocrine  the  amount of  ************************************
within thirty (30) days after the effective date of any such sublicense for said
rights under said  sublicense,  and (ii) DPC shall be responsible for payment to
the Third Party licensor of the Neurocrine Receptor License, all amounts payable
under the Neurocrine Receptor License which are attributable to DPC's activities
under its  sublicense.  DPC shall pay to Neurocrine  ***************************
********************************************************************************
********************************************************************************
**************************************************************************
<PAGE>

******************************************************************. For purposes
of  clarification,  it is intended  that  Neurocrine  may arrange with its Third
Party  licensor that royalty or milestone  sums due under this Paragraph will be
paid directly to such Third Party licensor by DPC and DPC will cooperate in such
agreement.   4.14  Janssen  or  Neurocrine  Obligation  of  Payment.  Except  as
specifically  provided for otherwise,  any obligation of payment to DPC pursuant
to the terms of this  Article for the  development  and sale of Products are the
responsibility  of  Janssen.  In the event  Janssen  shall  have  terminated  or
forfeited  its  rights  to  develop  and  commercialize  a  Product  in favor of
Neurocrine  and where  the  obligation  of  payment  arose due to acts  taken by
Neurocrine  subsequent to such  termination  or  forfeiture,  then such payments
shall be the  obligation  of  Neurocrine  alone.  Additionally,  the  actions of
Janssen and  Neurocrine  under this Article will be considered  the actions of a
single party in the  determination  of what  milestone  payments are due, in the
determination of royalty rate and in the determination of the number of Products
developed.

                                     *****

<PAGE>
                                      *****

<PAGE>
                                      *****

<PAGE>

********************************************************************************
********************************************************************************
********************************************************************************
********************************************************************************
********************************************************************************
********************************************************************************
********************************************************************************
*******************************************************.


                                  ARTICLE VI **
                                   RELEASE **
6.1 Release.  Each of DPC,  Neurocrine,  and Janssen for itself,  its  officers,
directors,  investors, employees, assigns and ** successors, in consideration of
the promises and covenants  contained herein, the sufficiency of which is hereby
acknowledged,  does ** hereby  fully and  forever  release,  remise,  acquit and
discharge each other, their representatives,  agents,  employees,  employers, **
officers,  directors,  shareholders,   administrators,   successors,  attorneys,
insurers  and  assigns  and any of their  Affiliates  of and ** from any and all
actions, causes of action, suits, claims, cross-claims, demands, debts, damages,
losses, costs and expenses,  of ** every kind, nature and description,  which it
now has, ever had, or which its administrators, successors, insurers and assigns
now ** have or may hereafter  have on account of, or arising out of, or relating
to (i) the *********************************************************************
********************************************************************************
*******************************************************************************

<PAGE>
********************************************************************************
********************************************************************************
********************************************************************************
********************************************************************************
********************************************************************************
***************.  Each of DPC,  Neurocrine  and  Janssen  expressly  agrees  and
intends  that this  release  shall  release  each other from any and all claims,
actual and potential,  known and unknown,  fixed and contingent including claims
of  which  the  Parties  are  not  aware  as of  the  date  hereof  relating  to
***************************  despite the fact that each may later discover facts
in addition to or different from those which it now believes to be true. Each of
DPC,  Neurocrine  and Janssen  agrees that it will  withdraw and desist from any
proceedings or arbitrations  presently in progress with the acknowledgement that
the issues of such  proceeding or  arbitration  have been finally  settled.  6.2
General Release. Each of DPC, Neurocrine and Janssen, being represented by legal
counsel,  acknowledges  that it is familiar with provisions of California  Civil
Code Section 1542, which provides as follows:  A GENERAL RELEASE DOES NOT EXTEND
TO CLAIMS WHICH THE  CREDITOR  DOES NOT KNOW OR SUSPECT TO EXIST IN HIS FAVOR AT
THE TIME OF EXECUTING  THE RELEASE,  WHICH IF KNOWN BY HIM MUST HAVE  MATERIALLY
AFFECTED HIS SETTLEMENT  WITH THE DEBTOR.  Each of DPC,  Neurocrine and Janssen,
being aware of said code  section,  agrees to expressly  waive any rights it may
have thereunder,  as well as under any other statute or common law principles of
similar effect. Neurocrine and Janssen further acknowledge and agree that this


<PAGE>


waiver of rights under Section 1542 of the Civil Code by DPC has been separately
bargained for and is essential and material term of this Agreement and,  without
such waiver,  each of DPC,  Neurocrine  and Janssen  would not have entered into
this Agreement.

6.3 No Admission.  DPC acknowledges that Neurocrine and Janssen have denied, and
continue  to  deny,   any  and  all  liability   with  respect  to  or  relating
********************************************************************************
********************************************************************************
*******************************************************************************.
Nothing in this Agreement shall  constitute any  acknowledgment  or admission of
liability  whatsoever by Neurocrine  and/or  Janssen nor is this Agreement to be
construed as an admission or  suggestion  of liability on the part of Neurocrine
and/or Janssen.  At all times and for all purposes,  this is a settlement of any
disputed claims intended to forever  terminate any claims or continuing  demands
which may be or may have been made between DPC and/or Neurocrine and/or Janssen,
or any of  their  respective  representatives,  successors,  assigns,  officers,
directors,  shareholders,  members, agents employees or insurers with respect to
the foregoing.

6.4  Remedies.  The Parties agree that after the  Effective  Date,  each of DPC,
Neurocrine and Janssen shall be permitted to enforce this Agreement with respect
to any duty or obligation each other have undertaken hereunder,  but in no event
and under no circumstances will each of DPC, Neurocrine and Janssen be permitted
to assert,  publicly  allege,  threaten to bring or bring any claim against each
other for any act,  event or omission which occurred prior to the Effective Date
relating  **********************************************************************
********************************************************************************
********************************************************************************

<PAGE>

********************************************************************************
********************************************************************************
********************************************************************************
********************************************************************************
********************************************************************************
********************************************************************************
********************************************************************************
***************************************************.


                                 ARTICLE VII **
                               CONFIDENTIALITY **

7.1  Confidentiality;  Exceptions.  Except to the extent expressly authorized by
this Agreement or otherwise agreed in writing,  **  ----------------------------
the Parties  agree that,  for the time  royalties are due and for five (5) years
thereafter, the receiving Party shall keep confidential and shall not publish or
otherwise  disclose  or use for any purpose  other than as provided  for in this
Agreement any Information and ** other confidential and proprietary  information
and materials  furnished to it by the other Party  pursuant to this Agreement **
(collectively,  "Confidential Information"), except to the extent that it can be
established by the receiving Party that such ** Confidential Information:

(a)  was in the lawful  knowledge and possession of the receiving Party prior to
     the time it was disclosed to, or learned by, the  receiving  Party,  or was
     otherwise  developed  independently by the receiving Party, as evidenced by
     written  **  records  kept in the  ordinary  course of  business,  or other
     documentary proof of actual use by the receiving Party;

<PAGE>
                                       33

(b)  was  generally  available  to the  public or  otherwise  part of the public
     domain at the time of its disclosure to the receiving Party;
(c)  became  generally  available to the public or otherwise  part of the public
     domain after its  disclosure  and other than through any act or omission of
     the receiving Party in breach of this Agreement; or
(d)  was  disclosed to the  receiving  Party,  other than under an obligation of
     confidentiality,  by a Third Party who had no obligation to the  disclosing
     Party not to disclose such information to others.

7.2 Authorized  Disclosure.  If a Party is required by law or regulation to make
any disclosure of the other Party's  Confidential  Information  it will,  except
where  impracticable  for  necessary  disclosures,  for  example in the event of
medical  emergency,  give reasonable advance notice to the other Parties of such
disclosure  requirement  and, except to the extent  inappropriate in the case of
Patents,  will use its reasonable  efforts to secure  confidential  treatment of
such Confidential Information required to be disclosed.

7.3 Survival.  This Article VII shall survive the  termination  or expiration of
this Agreement for a period of five (5) years.

7.4 Public Announcements.  No Party shall originate any publicity,  news release
or  public  announcements,  written  or oral,  whether  to the  public or press,
stockholders or otherwise, relating to this Agreement,  including its existence,
the  subject  matter  to which it  relates,  performance  under it or any of its
terms,  to any  amendment  hereto or  performances  hereunder,  other than those
announcements  that are  required by law to be made  without  the prior  written
consent of the other Parties.  Such announcements shall be brief and factual. If
a  Party  decides  to make  an  announcement  required  by  law,  it will  where
reasonable possible give the other Parties


<PAGE>


at least five (5) business days advance notice,  of the text of the announcement
so that  the  other  Parties  will  have an  opportunity  to  comment  upon  the
announcement. To the extent that any Party reasonably requests that a disclosing
or  announcing  Party seek  confidential  treatment  pursuant to Rule 406 of the
Securities Act of 1933 or Rule 24b-2 of the  Securities  Exchange Act of 1934 as
amended,  as  applicable  (or any other  applicable  regulation  relating to the
confidential  treatment  of  information)  of  any  information  proposed  to be
disclosed  or  announced,  the  disclosing  or  announcing  Party  will omit the
information  from the  disclosure or  announcement  unless in the opinion of the
disclosing  Party's legal  counsel such  information  is legally  required to be
fully disclosed.

                                  ARTICLE VIII
                              INTELLECTUAL PROPERTY

8.1 Ownership of Patents. Patents shall be owned according to the laws in effect
and  agreements  made  by the  Parties  hereto.  There  is no  provision  herein
affecting or  transferring  the ownership of any Patent.  8.2 Patent  Filings on
N-Compounds or N-Products. Neurocrine will cooperate with DPC to file divisional
applications  worldwide,  as  necessary,  to isolate  those  claims  relating to
N-Compounds  or N-Products  and  contained in  Neurocrine  N-Patents in separate
applications.  In regard to such divided  applications  relating N-Compounds and
N-Products,  DPC  shall  assume  all  control  and  responsibility  for  filing,
prosecuting and maintaining  such Patents,  including having the right to direct
or control all material  actions  relating to the  prosecution or maintenance of
such Patents. DPC will determine the countries in which to file Patents relating
to N-


<PAGE>


Compounds and  N-Products  and will assume all Patent Costs  relating to filing,
prosecuting and maintaining  such Patents.  The parties will cooperate with each
other with respect to any  interference  between subject matter in DPC's patents
covering  subject matter that overlaps with the subject matter in the Neurocrine
N-Patents.

8.3 Patent Filings.

(a)  Prosecution and  Maintenance.  Each Party shall prepare,  file,  prosecute,
     maintain  and  own  Janssen  X-Patents,  Neurocrine  X-Patents,  Neurocrine
     N-Patents and DPC X-Patents to cover discoveries and inventions made solely
     by its own  employees or  consultants  and use  reasonable  efforts to file
     initially all such  applications in the United States,  the European Patent
     Office or the appropriate forum under the circumstances.

(b)  Control.  The  Party who is  responsible  for  filing a  Janssen  X-Patent,
     Neurocrine X-Patent, or DPC X-Patent will be termed the "Filing Party" and,
     unless specifically provided for otherwise,  shall have the right to direct
     or control all material  actions relating to the prosecution or maintenance
     of such Patent and shall bear all Patent Costs  associated  therewith.  The
     Filing  Party shall keep the other  Parties  apprised of the status of each
     Janssen X-Patent,  Neurocrine X-Patent,  or DPC X-Patent and shall seek the
     advice of the other  Parties with  respect to patent  strategy and drafting
     applications and shall give reasonable  consideration to any suggestions or
     recommendations  of the other Parties  concerning the preparation,  filing,
     prosecution,  maintenance and defense thereof, in so far as such status and
     advice relates to X-Compounds,  or X-Products.  The Parties shall cooperate
     reasonably  in  the  prosecution  of  all  Janssen  X-Patents,   Neurocrine
     X-Patents,  or DPC  X-Patents  and  shall  share all  material  information
     relating  thereto,   including  all  material  communications  from  patent
     offices,  promptly  after  receipt of such  information,  in so far as such
     information relates to X-Compounds, or X-Products.


<PAGE>


                                       34
                     [***] CONFIDENTIAL TREATMENT REQUESTED

 ***  **************************************************************************
      **************************************************************************
      **************************************************************************
      **************************************************************************
      ***********************************.

(d)  Breadth  of  Filing.  Unless  specifically  provided  for  otherwise,   the
     determination  of  the  countries  in  which  to  file  Janssen  X-Patents,
     Neurocrine X-Patents,  and DPC X-Patents shall be made by the Filing Party.
     In the case of applications *********** and ***********, equivalent Patents
     covering    X-Compounds    and    X-Products    must   be   filed   in   at
     least***********************************************************
     ************************************************.  The country list of this
     sub-Paragraph may be reduced as to one application or the other where there
     is a good faith discussion and agreement among the Parties that such filing
     would not serve the interest of the Parties.

(e)  Discontinuation.  If, during the term of this  Agreement,  the Filing Party
     intends to allow any Janssen X-Patent, Neurocrine X-Patent, or DPC X-Patent
     to lapse or go  abandoned,  the Filing Party shall,  whenever  practicable,
     notify the  non-filing  Parties of such  intention at least sixty (60) days
     prior to the date upon which such Patent  shall lapse or become  abandoned,
     and the  non-filing  Parties shall  thereupon  have the right,  but not the
     obligation,  to assume responsibility for the prosecution,  maintenance and
     defense  thereof and all expenses  related  thereto.  The Filing Party will
     receive a  non-exclusive,  royalty-free  license  under such  Patent in the
     countries concerned.


<PAGE>
                                      41

8.4 Infringement by Third Parties. If any Janssen X-Patent, Neurocrine X-Patent,
and/or DPC X-Patent is  infringed by a Third Party in any country in  connection
with the manufacture,  use and sale of a X-Product in such country, the Party to
this Agreement first having knowledge of such infringement shall promptly notify
the  others in  writing.  The  notice  shall  set forth the known  facts of that
infringement in reasonable  detail.  The Party owning such Patent shall have the
primary right, but not the obligation, to institute,  prosecute, and control any
action or proceeding  with respect to such  infringement,  by counsel of its own
choice, and at its own expense.  If the owning Party fails to bring an action or
proceeding  within a period of one hundred  eighty (180) days after a request by
the  exclusively  licensed  Party of the infringed  subject matter to do so, the
exclusively  licensed Party of the infringed subject matter shall have the right
to bring and control  any such  action by counsel of its own choice,  and at its
own expense.  The Party bringing suit under this Paragraph  shall bear all costs
and expenses of the suit and shall retain any damages or other  monetary  awards
recovered. A settlement or consent judgment or other voluntary final disposition
of a suit brought by such exclusively licensed Party under this Paragraph may be
entered  into  without  the  consent of the  owning  Party;  provided  that such
settlement,  consent judgment or other disposition does not admit the invalidity
or  unenforceability  of any Patent;  and provided  further,  that any rights to
continue the infringing  activity in such settlement,  consent judgment or other
disposition  shall be limited to the Product or activity that was the subject of
the suit. A settlement or consent judgment or other voluntary final  disposition
of a suit brought by the owning Party under this  Paragraph  may be entered into
only with the  consent of such  exclusively  licensed  Party.  8.5  Defense  and
Settlement  of Third  Party  Claims.  If a Third  Party  asserts  that a patent,
trademark or other intangible right owned by it is infringed by the manufacture,
use or sale of


<PAGE>


any Product,  the Party responsible for the payment of royalties on such Product
pursuant to Article IV above (the "Defending  Party') will be solely responsible
for defending against any such assertions at its cost and expense. The Defending
Party  shall  have the  right to  defend  and  settle  against  such  charge  of
infringement

8.6  Patent  Assignment.  No Party may  assign  its  rights  under  any  Janssen
X-Patent,  Neurocrine X-Patent, Neurocrine N-Patent or DPC X-Patent, except with
the prior  written  consent of the  Party(ies)  obligated  to pay  royalties  on
Products covered by such Patent under Article IV above; provided,  however, that
a Party may assign such rights without consent to permitted  assignee under this
Agreement in connection with a merger or similar  reorganization  or the sale of
all or  substantially  all of its assets.

8.7 Notices  Relating to the Act.  The Filing  Party with respect to any Janssen
X-Patent,   Neurocrine  X-Patent,  DPC  X-Patent  shall  notify  the  Party(ies)
obligated to pay  royalties on Products  covered by such Patent under Article IV
above, of communications as to which the Filing Party receives (as patent owner)
a notice pursuant to the Drug Price  Competition and Patent Term Restoration Act
of 1984  (hereinafter  the  "Act"),  including  but not  necessarily  limited to
notices  pursuant to ss.ss.101 and 103 of the Act from persons who have filed an
abbreviated NDA ("ANDA") or a "paper" NDA.

     8.8  Authorization  Relating to Patent Term Extension.  The Filing Party of
any Janssen X-Patent, Neurocrine X-Patent, or DPC X-Patent hereby authorizes the
Party(ies)  obligated to pay royalties on Products  covered by such Patent under
Article IV above, to (a) provide in any NDA a list of patents which includes the
Filing Party Patents that relate to such Product and such other  information  as
the Party believes is  appropriate;  (b) commence suit for  infringement  of the
Patents  under ss.  271(e) (2) of Title 35 of the United  States  Code;  and (c)
exercise any rights that


<PAGE>


may be exercisable by the Filing Party as Patent owner under the Act,  including
without limitation, applying for an extension of the term of any patent licensed
to such  Party  hereunder.  In the  event  that  applicable  law in any  country
provides for the extension of the term of any patent  included  among the Filing
Party's Patents,  such as under the U.S. Drug Price  Competition and Patent Term
Restoration  Act of 1984,  the  Supplementary  Certificate  of Protection of the
Member  States of the  European  Union and other  similar  measures in any other
country,  the Filing  Party  shall apply for and use its  reasonable  efforts to
obtain such an extension or, should the law require the Party(ies)  obligated to
pay  royalties to so apply,  the Filing Party  hereby gives  permission  to such
Party  hereunder to do so. The Party(ies)  obligated to pay royalties  hereunder
and the Filing  Party  agree to  cooperate  with one another in  obtaining  such
extension. The Filing Party agrees to cooperate with the Party(ies) obligated to
pay  royalties  or  its  Sublicensee,  as  applicable,  in the  exercise  of the
authorization  granted  herein and will  execute  such  documents  and take such
additional  action as such Party hereunder may reasonably  request in connection
therewith, including, if necessary, permitting itself to be joined as a Party in
any suit for infringement  brought by such Party licensed hereunder.  DPC agrees
that  Janssen  and  Neurocrine  will in all  cases be  considered  as the  Party
obligated  to pay  royalties  under this  Paragraph  for any Product for any DPC
X-Patent.

                                   ARTICLE IX
                                 INDEMNIFICATION

9.1  Indemnification.  Each Party (the  "Indemnifying  Party") shall  indemnify,
defend and hold the other Parties (each an  "Indemnified  Party")  harmless from
and against any and all liabilities,  claims,  damages, costs, expenses or money
judgments ("Losses") incurred by or


<PAGE>


rendered  against the  Indemnified  Party and its  Affiliates  and  Sublicensees
incurred  in  the  defense  or  settlement  of a  Third  Party  lawsuit  or in a
satisfaction  of a Third Party  judgment  arising out of any  injuries to person
and/or  damage  to  property  resulting  from  the  research,   development  and
commercialization  of Products by the Indemnifying  Party,  provided however, an
Indemnified  Party  shall not be entitled to  indemnification  hereunder  to the
extent any Loss is  attributable  to the  Indemnified  Party's  negligence.  9.2
Procedure.  In the event that an  Indemnified  Party is seeking  indemnification
under  Paragraph 9.1, it shall inform  Indemnifying  Party of a claim as soon as
reasonably  practicable after it receives notice of the claim,  shall permit the
Indemnifying  Party to assume  direction and control of the defense of the claim
(including the right to settle the claim solely for monetary consideration), and
shall  cooperate as requested (at the expense of the  Indemnifying  Party in the
defense of the claim.

                                    ARTICLE X
                              TERM AND TERMINATION

10.1. Term. This Agreement shall commence on the Effective Date and shall remain
in effect on a  Product-by-Product  basis until the expiration of the obligation
to pay royalties on the part of any Party for such Product.

10.2     Material Breach.
     (a)  In the event that either Party  commits a breach of any material  term
          or  condition  of this  Agreement  and that Party fails to remedy that
          breach within sixty (60) days after receipt of written  notice of that
          breach  from the other  Party,  the Party  giving  notice  may, at its
          option,  begin arbitration  proceedings pursuant to Paragraph 11.2 and
          seek whatever relief he is entitled  to   under the law.


<PAGE>


     (b)  The Parties agree that a breach,  including a material breach,  by one
          Party under this  Agreement in its  obligations to a second Party will
          not effect the rights and  obligations  of the third Party  hereunder.
          Specifically,  a breach by Janssen of its obligations owed to DPC will
          not disturb the rights of  Neurocrine,  including the licenses held by
          Neurocrine,  and a breach by Neurocrine of its obligations owed to DPC
          will not disturb the rights of Janssen, including the licenses held by
          Janssen.

     (c)  A material  breach by Janssen under this Agreement  which results in a
          loss of rights by Janssen  which effects  Janssen's  ability to market
          X-Products  will be considered a material  breach by Janssen under the
          agreement  between Janssen and Neurocrine  effective  January 1, 1995.
          10.3  Bankruptcy.  Each Party may, in  addition to any other  remedies
          available  to it by law or in  equity,  exercise  the rights set forth
          below by written notice to any other Party (the "Insolvent Party"), in
          the event the Insolvent Party shall have become insolvent or bankrupt,
          or shall have made an assignment for the benefit of its creditors,  or
          there shall have been appointed a trustee or receiver of the Insolvent
          Party or for all or a substantial part of its property, or any case or
          proceeding  shall  have been  commenced  or other  action  taken by or
          against the Insolvent  Party in bankruptcy or seeking  reorganization,
          liquidation,   dissolution,  winding-up  arrangement,  composition  or
          readjustment  of its debts or any other relief  under any  bankruptcy,
          insolvency,  reorganization  or  other  similar  act  or  law  of  any
          jurisdiction  now or  hereafter  in effect,  or there  shall have been
          issued a  warrant  of  attachment,  execution,  distraint  or  similar
          process against any substantial  part of the property of the Insolvent
          Party,  and any such event  shall have  continued  for sixty (60) days
          undismissed,  unbonded  and  undischarged.  All  rights  and  licenses
          granted


<PAGE>


          under or pursuant to this Agreement are, and shall otherwise be deemed
          to be, for  purposes of Section 365 (n) of the U.S.  Bankruptcy  Code,
          licenses of rights to "intellectual property" as defined under Section
          101 of the U.S. Bankruptcy Code. The Parties agree that the Parties as
          licensees  of such rights under this  Agreement,  shall retain and may
          fully  exercise  all of their  rights  and  elections  under  the U.S.
          Bankruptcy  Code. The Parties  further agree that, in the event of the
          commencement of a bankruptcy  proceeding by or against any Party under
          the U.S.  Bankruptcy  Code,  the other  Parties shall be entitled to a
          complete duplicate of (or complete access to, as appropriate) any such
          intellectual   property  and  all  embodiments  of  such  intellectual
          property,  and same, if not already in the their possession,  shall be
          promptly  delivered  to them  (i)  upon  any  such  commencement  of a
          bankruptcy  proceeding upon its written request  therefor,  unless the
          Party subject to such proceeding  elects to continue to perform all of
          their  obligations under this Agreement or (ii) if not delivered under
          (i) above, upon the rejection of this Agreement by or on behalf of the
          Party subject to such proceeding upon written request  therefor by the
          other  Party.  Upon the  insolvency  of any  Party  hereto,  the other
          Parties shall have the option to (i) terminate  this Agreement or (ii)
          keep this  Agreement  in full force and effect and retain all licenses
          granted  hereunder  subject  to  the  payment  of all  milestones  and
          royalties set forth above.  The Parties  expressly  agree that a Party
          reserves a security  interest  in any  amounts  owed to the  Insolvent
          Party and  maintains a right of setoff  against  amounts  owed to such
          Party by the  Insolvent  Party or the value of  damages  caused by any
          failure to perform by the Insolvent Party. 10.4 Survival. Termination,
          relinquishment  or expiration of the Agreement for any reason shall be
          without prejudice to any obligations which shall have accrued prior to
          such  termination,  relinquishment or expiration,  including,  without
          limitation, the any payment obligations and any


<PAGE>


          and all damages arising from any breach  hereunder.  Such termination,
          relinquishment   or  expiration  shall  not  relieve  any  Party  from
          obligations  that are expressly  indicated to survive  termination  or
          expiration of the Agreement.

                                   ARTICLE XI
                               DISPUTE RESOLUTION

11.1 Dispute Resolution and Arbitration. In the case of any disputes between the
Parties arising from this Agreement, and in case this Agreement does not provide
a solution  for how to resolve  such  disputes,  the Parties  shall  discuss and
negotiate in good faith a solution  acceptable to both Parties and in the spirit
of this Agreement. If after good faith discussions, the Parties fail to reach an
amicable  agreement,  then  either  Party may upon  written  notice to the other
submit to binding  arbitration  pursuant to Section 11.2. 11.2 Arbitration.  Any
dispute,  controversy or claim arising out of or in connection  with or relating
to this Agreement, or the interpretation,  application,  breach,  termination or
validity  thereof,  including  any claim of inducement by fraud or otherwise not
settled by the  procedures  set forth in  Paragraph  11.1 above or the breach or
alleged breach of a material provision of this Agreement shall be adjudicated by
arbitration  in  accordance  with the  Arbitration  Proceedings  as set forth in
Exhibit A attached hereto.

                                   ARTICLE XII
                  REPRESENTATIONS AND WARRANTIES; EXCLUSIVITY.

12.1  Representations and Warranties.  Each of the Parties hereby represents and
warrants and covenants as follows: (a)

<PAGE>

                                       42
                     [***] CONFIDENTIAL TREATMENT REQUESTED

     (a)  Binding  Agreement.  This  Agreement  is a legal and valid  obligation
          binding upon such Party and  enforceable in accordance  with its terms
          except as (i) enforceability may be limited by bankruptcy, insolvency,
          reorganization,  moratorium or similar laws  affecting  enforcement of
          creditor's   rights   and  (ii)   equitable   principles   of  general
          applicability.
     (b)  Due Authorization.  Each party is duly authorized and validly existing
          under the laws of the state of Delaware and has full  corporate  power
          and  authority  to  enter  into  this  Agreement  and  carry  out  the
          provisions hereof.
     (c)  No Conflict. The execution,  delivery and performance of the Agreement
          by such Party does not  conflict  with any  agreement,  instrument  or
          understanding,  oral or written, to which it is a Party or by which it
          is bound, nor violate any law or regulation of any court, governmental
          body or administrative or other agency having jurisdiction over it.
     (d)  Third  Party  Rights.  Each Party has not,  and during the term of the
          Agreement will not, grant any right to any Third Party relating to its
          respective  technology  in the Field  which  would  conflict  with the
          rights granted to the other Party hereunder.
     (e)  Patents.  Each Party owns or  otherwise  controls  all of the  rights,
          title and interest in and to Patents licensed by it hereunder.

12.2 Patents  Warranties.  To its reasonable  best knowledge as of the Effective
Date, each Party represents and warrants that it is not aware of any Third Party
right, other than *************************************************************;
which would  interfere  with the  exercise by the Parties of the rights  granted
hereunder.

<PAGE>
                                       53

12.3 Exclusivity.  Unless  specifically stated herein or provided for elsewhere,
the Parties are free to compete in any market or therapeutic area, including the
Field, without restriction and make no promises of exclusivity.

                                  ARTICLE XIII
                                  MISCELLANEOUS

13.1 Relationship of Parties. For the purposes of this Agreement,  each Party is
an independent  contractor  and not an agent or employee of any other Party.  No
Party  shall  have  authority  to  make  any  statements,   representations,  or
commitments  of any kind,  or to take any action  which  shall be binding on any
other Party,  except as may be  explicitly  provided for herein or authorized in
writing.

13.2  Counterparts.  This Agreement may be executed in one or more counterparts,
each of which shall be deemed an original,  and all of which  together  shall be
deemed to be one and the same instrument.

13.3 Headings. All headings in this Agreement are for convenience only and shall
not affect the  meaning of any  provision  hereof.  13.4  Binding  Effect.  This
Agreement  shall  inure to the  benefit of and be binding  upon the  Parties and
their respective  lawful successors and assigns.  13.5 Assignment.  No party may
assign this  Agreement  without the prior written  consent of the other Parties,
except that a Party may assign this  Agreement to an Affiliate or to a successor
in connection with the merger,  consolidation,  or sale of all or  substantially
all of its assets or that  portion of its  business  pertaining  to the  subject
matter of this Agreement.


<PAGE>


13.6  Amendment  and Waiver.  This  Agreement may be amended,  supplemented,  or
otherwise modified at any time, but only by means of a written instrument signed
by all of the Parties.  Any waiver of any rights or failure to act in a specific
instance  shall  relate only to such  instance  and shall not be construed as an
agreement to waive any rights or fail to act in any other  instance,  whether or
not similar.

13.7  Governing Law. This  Agreement and the legal  relations  among the parties
shall be governed by and construed in  accordance  with the laws of the State of
Delaware,  USA,  irrespective  of  any  choice  of  laws  or  conflict  of  laws
principles.

13.8 Severability.  In the event that any provision of this Agreement shall, for
any  reason,  be  held to be  invalid  or  unenforceable  in any  respect,  such
invalidity or unenforceability  shall not affect any other provision hereof, and
this Agreement shall be construed as if such invalid or unenforceable  provision
had not been included herein.

13.9 Entire Agreement. This Agreement constitutes the entire agreement among the
Parties with respect to the subject  matter  hereof and  supersedes  any and all
prior or contemporaneous  oral and prior written agreements and  understandings.

13.10 Advice of Counsel. The Parties have each consulted counsel of their choice
regarding this Agreement,  and each  acknowledges and agrees that this Agreement
shall not be deemed to have been  drafted  by one party or  another  and will be
construed  accordingly.

13.11 Consents Not  Unreasonably  Withheld.  Whenever  provision is made in this
Agreement  for a Party to secure the  consent  or  approval  of any other,  that
consent or approval  shall not  unreasonably  be withheld,  and whenever in this
Agreement  provision  is made for a Party to object to or  disapprove  a matter,
such objection or disapproval shall not unreasonably be exercised.


<PAGE>


13.12 Retained Rights.  Nothing in this Agreement shall limit in any respect the
right of any Party to  conduct  research  and  development  with  respect to and
market  products  outside the Field  using such  Party's  know-how.

13.13 Force  Majeure.  No Party shall lose any rights  hereunder or be liable to
any other  Party for damages or losses on account of failure of  performance  by
the  defaulting  Party if the failure is occasioned by government  action,  war,
fire,  explosion,  flood,  strike,  lockout,  embargo,  act of God, or any other
similar  cause beyond the control of the  defaulting  Party,  provided  that the
Party  claiming  force  majeure has exerted all  reasonable  efforts to avoid or
remedy such force majeure; provided,  however, that in no event shall a Party be
required  to settle  any  labor  dispute  or  disturbance.  Notwithstanding  the
foregoing,  this  Section  13.13  shall not  operate  to  relieve  a Party  from
performance  of any  obligation  for more than ninety (90) days.

13.14 Further  Actions.  Each Party agrees to execute,  acknowledge  and deliver
such further instruments,  and to do all such other acts, as may be necessary or
appropriate  in order to carry out the  purposes  and intent of this  Agreement.

13.15 No  Trademark  Rights.  Except as  otherwise  provided  herein,  no right,
express or implied, is granted by the Agreement to use in any manner the name of
any  Party,  or any  other  trade  name or  trademark  of the any  Party  or its
Affiliates in connection with the  performance of the Agreement.

13.16  Notices.  All notices  hereunder  shall be in writing and shall be deemed
given if delivered personally or by facsimile  transmission  (receipt verified),
telexed,  mailed by registered  or certified  mail (return  receipt  requested),
postage  prepaid,  or sent by express  courier  service,  to the  Parties at the
following  addresses  (or at such  other  addresses  for a  Party  as  shall  be
specified


<PAGE>

by like notice; provided, that notices of a change of address shall be effective
only upon receipt thereof).

         If to DPC,
                  addressed to:     Vice-President
                                    Product Planning & Acquisition
                                    DuPont Pharmaceuticals Company
                                    974 Centre Road
                                    Chestnut Run Plaza, Walnut Run
                                    Wilmington, DE 19805
                  Phone:            (302) 992-4545
                  Facsimile:        (302) 992-3040

                  With a copy to:   Patent Department
                                    Chief Intellectual Property Counsel
                                    DuPont Pharmaceuticals Company
                                    974 Centre Road
                                    Chestnut Run Plaza, Walnut Run
                                    Wilmington, DE 19805
                                    Facsimile:   (302) 992-3999

         If to Janssen:

                  addressed to: President, JRF

                  Janssen Pharmaceutica N. V.
                  Turnhoutseweg 30
                  2340 Beerse, Belgium
                  Phone: (32 +14) 602111
                  Facsimile:   (32+14) 602841

                  With a copy to:   Office of General Counsel
                                    Johnson & Johnson
                                    One Johnson & Johnson Plaza
                                    New Brunswick, NJ 08933
                                    Facsimile:   732-524-2788

         If to Neurocrine:

<PAGE>
                  addressed to: President & CEO

                  Neurocrine Biosciences Inc.
                  10555 Science Center Drive
                  San Diego, CA 92121
                  Phone: 858-658-7600
                  Facsimile:  858-658-7605

                  With a copy to:   General Counsel


Each of the Parties  consent to the personal  jurisdiction  of the U.S.  Federal
Courts  and agree to accept  any legal  process  served  upon such  Party at the
addresses  specified above for such Party.

13.17 Waiver.  Except as specifically  provided for herein, the waiver from time
to time by any Party of any of its rights or its failure to exercise  any remedy
shall not operate or be construed as a continuing waiver of same or of any other
of such Party's rights or remedies provided in this Agreement.

13.18  Compliance with Laws. The Parties shall comply with all applicable  laws,
rules,  regulations  and orders of the United  States  and  applicable  European
countries and  supra-governmental  organizations  and all  jurisdictions and any
agency or court thereof in connection  with this Agreement and the  transactions
contemplated thereby.



<PAGE>



         IN WITNESS  WHEREOF,  the undersigned  have duly executed and delivered
this  Agreement  as a sealed  instrument  effective  as of the date first  above
written.
                                    ........JANSSEN PHARMACEUTICA, N.V.



                                    ........By:....../s/ Dr. Alan Dunton
                                    .................President


                                            NEUROCRINE BIOSCIENCES, INC.


                                    ........By:....../s/ Gary Lyons
                                    .................President



                                            DUPONT PHARMACEUTICALS COMPANY.

                                    ........By: ...../s/ Kurt M. Landgraf
                                    .................Kurt M. Landgraf
                                    .................Executive Vice-President &
                                                 Chief Operating Officer, DuPont



<PAGE>


                                    Exhibit A
                             Arbitration Proceedings

1.1      (a)        Any  dispute,  controversy  or  claim  arising  out of or in
                    connection  with  or  relating  to  this  Agreement,  or the
                    interpretation, application, breach, termination or validity
                    thereof,  including  any  claim  of  inducement  by fraud or
                    otherwise, shall, before submission to arbitration, first be
                    mediated  through  non-binding  mediation in accordance with
                    the Model Procedures for the Mediation of Business  Disputes
                    promulgated by the Center for Public Resources  ("CPR") then
                    in effect,  except  where  those rules  conflict  with these
                    provisions,  in which case  these  provisions  control.  The
                    mediation shall be conducted in  Philadelphia,  PA and shall
                    be attended by a senior  executive with authority to resolve
                    the dispute from each of the  operating  companies  that are
                    Parties.

         (b)      The  mediator  shall be an attorney  specializing  in business
                  litigation who has at least 15 years of experience as a lawyer
                  with a law firm of over 25  lawyers  or was a judge of a court
                  of general  jurisdiction  and who shall be appointed  from the
                  list of neutrals maintained by CPR.

         (c)      The  Parties  shall  promptly  confer in an effort to select a
                  mediator  by  mutual  agreement.  In the  absence  of  such an
                  agreement,   the  mediator  shall  be  selected  from  a  list
                  generated  by CPR with each Party having the right to exercise
                  challenges  for cause  and two  peremptory  challenges  within
                  three business days of receiving the CPR list.

         (d)      The   mediator   shall  confer  with  the  Parties  to  design
                  procedures  to  conclude  the  mediation  within  no more than
                  forty-five (45) days after  initiation.  Unless agreed upon by
                  the  Parties  in  writing,  under no  circumstances  shall the
                  commencement  of  arbitration  under  Section  1.2  hereof  be
                  delayed  more  than  forty-five  (45)  days  by the  mediation
                  process specified herein.

         (e)      Each  Party  agrees  to  toll  all   applicable   statutes  of
                  limitation  during the  mediation  process  and not to use the
                  period or pendency of the mediation to disadvantage  the other
                  Party procedurally or otherwise.  All negotiations pursuant to
                  this  clause  will be  confidential  and shall be  treated  as
                  compromise and settlement negotiations for the purposes of the
                  Federal Rules of Evidence and all other evidentiary purposes.

         (f)      Each Party has the right to pursue provisional relief from any
                  court, such as attachment,  preliminary injunction,  replevin,
                  etc., to avoid irreparable  harm,  maintain the status quo, or
                  preserve the subject  matter of the  arbitration,  even though
                  mediation has not been commenced or completed.

1.2     (a)       Following the mediation  procedures set forth in Exhibit A
                  Section 1.1, any dispute,  controversy or claim arising out of
                  or in connection  with or relating to this  Agreement,  or the
                  interpretation,  application,  breach, termination or validity
                  thereof,  including  any  claim  of  inducement  by  fraud  or
                  otherwise,  will be submitted for  resolution  to  arbitration
                  pursuant to the commercial  arbitration  rules then pertaining
                  of the Center for Public Resources ("CPR"), except where those
                  rules  conflict  with  these  provisions,  in which case these
                  provisions   control.   The   arbitration   will  be  held  in
                  Philadelphia, PA.

         (b)      The panel shall consist of three  arbitrators  chosen from the
                  CPR Panels of Distinguished  Neutrals each of whom is a lawyer
                  specializing  in  business  litigation  with at least 15 years
                  experience  with a law firm of over 25  lawyers or was a judge
                  of a court of general jurisdiction.

         (c)      The Parties agree to cooperate (1) to obtain  selection of the
                  arbitrators  within  thirty  (30)  days of  initiation  of the
                  arbitration,  (2) to meet with the  arbitrators  within thirty
                  (30) days of  selection  and (3) to agree at that  meeting  or
                  before upon  procedures for discovery and as to the conduct of
                  the hearing which will result in the hearing  being  concluded
                  within no more than nine (9)  months  after  selection  of the
                  arbitrators  and in the award being rendered within sixty (60)
                  days of the conclusion of the hearings, or of any post-hearing
                  briefing,  which  briefing  will be  completed by both Parties
                  with twenty (20) days after the conclusion of the hearings. In
                  the event no such  agreement  is reached,  the CPR will select
                  arbitrators,  allowing  appropriate  strikes  for  reasons  of
                  conflict or other cause and three  peremptory  challenges  for
                  each side. The  arbitrators  shall set a date for the hearing,
                  commit to the rendering of the award within sixty (60) days of
                  the  conclusion  of the  evidence  at the  hearing,  or of any
                  post-hearing  briefing  (which  briefing  will be completed by
                  both  sides  in no  more  than  twenty  (20)  days  after  the
                  conclusion  of  the  hearings),   and  provide  for  discovery
                  according  to these time  limits,  giving  recognition  to the
                  understanding  of the  Parties  hereto  that they  contemplate
                  reasonable   discovery,   including   document   demands   and
                  depositions,  but that such  discovery  be limited so that the
                  time  limits   specified  herein  may  be  met  without  undue
                  difficulty. In no event will the arbitrators allow either side
                  to obtain more than a total of forty (40) hours of  deposition
                  testimony from all  witnesses,  including both fact and expert
                  witnesses.  In the event  multiple  hearing days are required,
                  they will be scheduled  consecutively  to the greatest  extent
                  possible.

         (d)      The  arbitrators   shall  render  their  award  following  the
                  substantive law of Delaware.  The arbitrators  shall render an
                  opinion  setting forth findings of fact and conclusions of law
                  with the reasons therefor stated. A transcript of the evidence
                  adduced at the hearing shall be made and shall,  upon request,
                  be made available to either Party.

         (e)      To the extent  possible,  the  arbitration  hearings and award
                  will be maintained in confidence.

         (f)      Any United States  District Court having  jurisdiction  of the
                  matter may enter  judgment  upon any  award.  In the event the
                  panel's  award  exceeds Five Million  Dollars  (5,000,000)  in
                  monetary damages or includes or consists of equitable  relief,
                  then the court shall vacate, modify or correct any award where
                  the  arbitrators'  findings  of fact  are  clearly  erroneous,
                  and/or  where  the   arbitrators'   conclusions   of  law  are
                  erroneous;  in other words,  it will undertake the same review
                  as if it were a federal  appellate  court reviewing a district
                  court's findings of fact and conclusions of law rendered after
                  a bench  trial.  An award for less than Five  Million  Dollars
                  (5,000,000) in damages and not including  equitable relief may
                  be  vacated,  modified  or  corrected  only  upon the  grounds
                  specified in the Federal  Arbitration Act. The Parties consent
                  to the  jurisdiction of the District Court for the enforcement
                  of these  provisions,  the entry of judgment on any award, and
                  the vacatur, modification and correction of any award as above
                  specified.

         (g)      Each Party has the right before or during the  arbitration  to
                  seek  and  obtain  from  the  appropriate   court  provisional
                  remedies such as attachment, preliminary injunction, replevin,
                  etc. to avoid  irreparable  harm,  maintain the status quo, or
                  preserve the subject matter of the arbitration.

         (h)      Each  Party  hereto  waives its right to trial of any issue by
                  jury.

         (i)      Each Party hereto waives any claim to punitive,  exemplary and
                  consequential damages from the other.




                     [***] CONFIDENTIAL TREATMENT REQUESTED
                          REDACTED FOR CONFIDENTIALITY


                              AMENDMENT NUMBER ONE
                              TO AGREEMENT BETWEEN
                        NEUROCRINE BIOSCIENCES, INC. AND
                           JANSSEN PHARMACEUTICA, N.V.


AMENDMENT  NUMBER  ONE  dated  September  24,  1999  (this  "Amendment")  to the
Agreement  effective  as of January 1, 1995 (the  "Original  Agreement")  by and
between  Neurocrine  Biosciences,  Inc., a Delaware  corporation  with principle
offices  located at 10555 Science  Center  Drive,  San Diego,  California  92121
("Neurocrine") and Janssen  Pharmaceutica,  N.V., a corporation  organized under
the laws of Belgium with principle  offices  located at  Turnhoutseweg  30, 2340
Beerse, Belgium ("Janssen").

WHEREAS,  pursuant  to the  Original  Agreement,  Janssen  and  Neurocrine  have
conducted    a    collaborative    research    program    in   the    field   of
corticotropin-releasing factor (CRF) Receptor Antagonists (as defined below) and
have developed certain technology in this field.

WHEREAS,  the Research (as defined  below)  conducted by Neurocrine  and Janssen
pursuant  to the  Original  Agreement  has  led to  filing  of  patents  and the
identification  of certain CRF  Receptor  Antagonist  pre-clinical  and clinical
development candidate compounds.

WHEREAS, Research Term (as defined in the Original Agreement) expired on January
1, 1998 and Janssen and Neurocrine now wish to conduct an additional  program of
collaborative  research  (the  "Back-up  Program")  designed to identify new CRF
Receptor Antagonist which will be subject to the terms of the Original Agreement
as amended hereby.

NOW, THEREFORE,  in consideration of the promises and mutual covenants contained
herein,  and  for  other  good  and  valuable  consideration,  the  receipt  and
sufficiency  of which are  hereby  acknowledged,  the  parties  hereto  agree as
follows:

                                    ARTICLE 1
                                   DEFINITIONS

Defined Terms.  Capitalized  terms used herein that are not defined herein shall
have the meanings assigned to such terms in the Original Agreement.

1.1 "Amendment Effective Date" shall mean April 15, 1999.

1.2 "Back-up PCC" shall mean any  composition of matter that (or, in the case of
prodrugs, an active ----------- metabolite of which):

(a)  demonstrates        CRF        Receptor         Antagonist         activity
     ****************************** ****************; and


<PAGE>



(b)  demonstrates   CRF   Receptor   Antagonist   activity   at  a   dosage   of
     ***************************************************************************
     **************************************************************************,
     provided that at the request of  Neurocrine,  such activity is confirmed in
     the ******** by repeating the experiment; and

(c)  is within the scope of the Back-up Program Patents; and

(d)  is  discovered,  identified,  synthesized,  developed  or acquired by or on
     behalf of  Neurocrine  or Janssen  within the scope and during the  Back-up
     Program Term and is  recognized  by either Party to meet the  conditions of
     (a)  and (b)  hereof,  prior  to the  first  anniversary  of the end of the
     Back-up Program Term.

1. 3 "Back-up  Program" shall mean all work performed by the Parties or on their
behalf directed towards or in connection with the discovery,  identification and
synthesis of Back-up PCCs during the Back-up Program Term, but shall not include
work  performed  by Janssen on the PCCs of the  Original  Agreement  without the
direct cooperation or assistance of Neurocrine.

1. 4     "Back-up  Program  Patents"  shall  mean  the  Patents ****************
************   which  consist  of **********************************************
*****************   ******************  and  the  Neurocrine  Back-up Patents.

1.5 "Back-up  Program Term" shall mean the term  beginning on April 15, 1999 and
ending  February 15, 2001 or such earlier date as Janssen  shall  terminate  the
Back-up Program in accordance with section 2a.13.

1.6 "Neurocrine Back-up Patents" shall mean *************************** filed by
Neurocrine,  excluding any genus thereof  outlicensed  to a Third Party with the
knowledge of Janssen.

1.7 "Preliminary  Back-up  Candidate" shall mean a PCC,  including  Back-up PCC,
that meets the following criteria:

(i)      demonstrates ************************* in Exhibit B; and
(ii)     demonstrates the ******************** in Exhibit B; and
(iii)    demonstrates no **************** as set forth in Exhibit B; and
(iv)     falls  within  the scope of the claims of a Program  Patent,  including
         Back-up  Program  Patent,  or is licensed to Janssen and  Neurocrine by
         DuPont Pharmaceuticals  Company under the executed Settlement Proposal,
         and on the basis of review of published applications appears to be free
         of published Patent claims of Third Parties.

1.8  "Settlement  Proposal"  shall mean the  settlement  proposal among Janssen,
Neurocrine    and   a   Third   Party    (DuPont    Pharmaceuticals    Company),
****************************.


<PAGE>


                                        4

                                    ARTICLE 2
                        AMENDMENT OF CERTAIN DEFINITIONS.

2.1 The definition of Collaboration  Tangible Research Product is hereby revised
to read as set forth below: ---------------------------------------

         "Collaboration  Tangible  Research  Product"  means any  composition of
         matter or other tangible asset, including but not limited to compounds,
         natural  products or  fermentation  broths and/or  extracts or factions
         thereof,  immunoglobulin molecules,  including active fragments thereof
         and monoclonal antibodies, cells and cell lines, DNA and RNA molecules,
         plasmids, proteins, peptides,  receptors,  receptor fragments, research
         tools,  materials for use in screening  methods and techniques  made or
         synthesized  by either  Party in the course of the  Research or Back-up
         Program,  or acquired by  Neurocrine  in the course of the  Research or
         Back-up  Program  with  funds  provided  by  Janssen  under  2.5(c)  or
         2a.7(iii) as mutually agreed.

2.2 The  definition of  Non-Collaboration  Tangible  Research  Product is hereby
revised to read as set forth below:

         "Non-Collaboration  Tangible Research Product" means any composition of
         matter or other tangible asset, including but not limited to compounds,
         natural  products or  fermentation  broths and/or  extracts or factions
         thereof,  immunoglobulin molecules,  including active fragments thereof
         and monoclonal antibodies, cells and cell lines, DNA and RNA molecules,
         plasmids, proteins, peptides,  receptors,  receptor fragments, research
         tools,  materials for use in screening  methods and techniques  made or
         synthesized by either Party outside of the Research or Back-up  Program
         before,  during or after the Research Term and Back-up Program Term and
         actually  utilized by such Party in conducting  the Research or Back-up
         Program, respectively.

2.3 The definition of Primary  Collaboration  Compounds or PCC is hereby amended
so that subparagraphs (c)(i) and (c)(ii) shall read as set forth below:

(i)                        is  (A)   discovered,   identified,   synthesized  or
                           acquired  by or on behalf of  Neurocrine  or  Janssen
                           prior  to  the  end  of  the  Research  Term  and  is
                           recognized by either Party to meet the  conditions of
                           (a) and (b) hereof, prior to the first anniversary of
                           the end of the Research Term or (B) is a Back-up PCC;
                           or
(ii)                       is (A) first discovered,  identified,  synthesized or
                           acquired by or on behalf of Janssen during the period
                           beginning  with  the  end of the  Research  Term  and
                           ending on the Amendment Effective Date and recognized
                           by Janssen to meet the  condition of (b) hereof prior
                           to the third  anniversary  of the end of the Research
                           Term,   or   (B)   first   discovered,    identified,
                           synthesized  or  developed  by  Janssen or by a Third
                           Party  directly  or  indirectly  on behalf of Janssen
                           during  the  period   beginning   on  the   Amendment
                           Effective Date and ending on the third anniversary of
                           the end of the Research Term and


<PAGE>


                           recognized  by Janssen to meet the  condition  of (b)
                           hereof   during   such   period  if  the   discovery,
                           identification,  synthesis or development (whether by
                           Janssen or a Third Party) would, but for any licenses
                           granted  hereunder  or  pursuant  to  the  Settlement
                           Proposal, infringe any Neurocrine Patent; or

2.4 The  definition  of Program  Patents is hereby  amended to read as set forth
below:

         "Program  Patents" shall mean on a genus by genus basis, the genuses in
         any Patent (or pending  application  for a Patent) the subject of which
         is an invention  that (i) was conceived  (in a writing  provided to the
         other  Party) or reduced to  practice by Janssen or  Neurocrine  in the
         course of the  Research  or within the scope and during the term of the
         Back-up  Program and (ii) that comprises a PCC or SCC or a formulation,
         method of use or method of manufacture thereof.


                                    ARTICLE 3
                                OTHER AMENDMENTS

3.1  Amendment  of Paragraph  9.1.  Paragraph  9.1 of the Original  Agreement is
hereby amended so that the second sentence shall read as set forth below:

         Title to all  other  Patents  claiming  inventions  made  solely  by an
         employee of a Party in the course of performing Research or the Back-up
         Program shall be owned by such Party.

3.2  Amendment  of Paragraph  9.2.  Paragraph  9.2 of the Original  Agreement is
hereby amended so that the first sentence shall read as set forth below:

         Each  Party  shall  provide  to  the  other  any  invention  disclosure
         submitted in the normal course and  disclosing an invention  arising in
         the course of the Research or Back-up Program.

3.3      Amendment of Paragraph 10.3.  Paragraph 10.3 of the Original Agreement
is hereby amended to read as set forth below:

         10.3  Exclusivity/  Non-Competition.   During  the  Research  Term  and
         thereafter  until the Amendment  Effective Date,  Neurocrine  shall not
         conduct, have conducted or fund any research, development,  regulatory,
         manufacturing or commercialization  activity directed to the discovery,
         development or commercialization of CRF Antagonists for use in anxiety,
         depression  or  drug  abuse  except  as  permitted   pursuant  to  this
         Agreement.

3.4 Amendment of Paragraph  11.6.  The first  sentence of Paragraph  11.6 of the
Original Agreement is hereby revised to read as set forth below:

                  11.6 Termination for  Convenience.  Janssen may terminate this
         Agreement  for any  reason  without  cause  at any  time  with  further
         obligations  of payment on the part of Janssen being limited to amounts
         expected by Neurocrine under Paragraph 2.5 (including


<PAGE>


         without  limitation  2.5(b)),  Paragraph 6.1 above and paragraph  2a.7,
         which  Neurocrine  would have  received if the  Agreement  had not been
         terminated under this Paragraph 11.6.

3.5 Amendment of Paragraph  15.8.  Paragraph  15.8 of the Original  Agreement is
hereby amended to read as set forth below.
                          ----------------------------


         15.8 Notices.  All notices  hereunder  shall be in writing and shall be
         deemed  given if  delivered  personally  or by  facsimile  transmission
         (receipt  verified),  telexed,  mailed by registered or certified  mail
         (return receipt requested), postage prepaid, or sent by express courier
         service,  to the  Parties at the  following  address  (or at such other
         address for a party as shall be  specified  by like  notice;  provided,
         that  notices  of a change  of  address  shall be  effective  only upon
         receipt thereof.

         If to Neurocrine,

           addressed to: Neurocrine Biosciences, Inc.
                         10555 Science Center Drive
                         San Diego, CA 92121
                         Attention: President & CEO
                         Telephone:  858-658-7600
                         Telecopy: 858-658-7605

       If to Janssen,

         addressed to:   Janssen Pharmaceutica,N.V.
                         Turnhoutseweg 30
                         2340 Beerse, Belgium
                         Attention: President, JRF
                         Telephone: (32 + 14) 60-21-11
                         Telecopy: (32 + 14) 60-28-41


         With a copy to:            Office of General Counsel
                                    Johnson & Johnson
                                    One Johnson & Johnson Plaza
                                    New Brunswick, NJ 08933

         Each of the Parties  consent to the personal  jurisdiction  of the U.S.
         Federal  Courts and agree to accept any legal process  served upon such
         Party at the addresses specified above for such Party.


                                                     ARTICLE 4
                                           ADDITION OF NEW ARTICLE II A

The Original  Agreement is hereby  amended by the addition of the  following new
article covering the terms and conditions under which the parties have agreed to
conduct the Back-up Program.



<PAGE>


                                       13
                     [***] CONFIDENTIAL TREATMENT REQUESTED

                                  ARTICLE II A
                                 BACK-UP PROGRAM

         2a.1  Back-up  Program.  Janssen  and  Neurocrine  agree to  conduct  a
         collaborative  Back-up Program under the terms and conditions set forth
         in this Article II A.

                  (i) Scope. The scope of the Back-up Program will be limited to
                  identification,  characterization and pre-clinical development
                  of CRF  Antagonist  compounds  within the scope of the Back-up
                  Program Patents.  The Parties acknowledge that a number of CRF
                  Antagonist  Compounds  identified in the scope of the Research
                  have been designated  PCCs. It is anticipated that the Back-up
                  Program  will  focus on the  discovery  of new PCCs but to the
                  extent the JRC elects to conduct further  characterization and
                  development  of PCCs  identified in the course of the Research
                  as part  of the  Back-up  Program,  the  characterization  and
                  development of such PCCs shall be subject to the terms of this
                  Article II A.

                  (ii)    Goal. It is the goal of the Back-up Program to********
                  *************************************************************
                  **************************************************************
                  ********************************.
                  The  Parties  will in good faith use  commercially  reasonable
                  efforts  to  meet  the  goals  of  the  Back-up  Program.  For
                  clarification,  there is no  obligation on the part of Janssen
                  to file an IND or any equivalent thereof on any PCC, including
                  Back-up PCC, imposed by the operation of this Amendment except
                  as provided in 2a.8(ii).

         2a.2     The JRC.

                  (i) Formation.  Janssen and Neurocrine  will establish a Joint
                  Research and Development Committee ("JRC") to oversee,  review
                  and  co-ordinate  the Back-up  Program and the  implementation
                  thereof.  The JRC will  consist of at least  three (3) members
                  from  each  of  Janssen  and  Neurocrine   (with  Janssen  and
                  Neurocrine having equal representation).

                  (ii) Decisions. Each Party shall have one consolidated vote on
                  any issue and decisions of the JRC shall be by unanimous vote.
                  If  the  JRC  fails  to  resolve  any  matter  before  it  for
                  consideration,  the matter  shall be resolved  pursuant to the
                  dispute resolution provisions of Paragraph 13.1.

                  (iii) FTE use. The JRC will use reasonable efforts to allocate
                  work  under the Plan to supply  Neurocrine  with  Neurocrine's
                  expected  utilization  rate of  approximately  ******/calendar
                  quarter.  The JRC may provide  that FTE  utilization  be moved
                  from one quarter to another where such is in the best interest
                  of the Plan and convenient to Neurocrine.

                  (iv)  Subcommittees.  From time to time the JRC may  establish
                  subcommittees  to oversee  particular  projects or  activities
                  (such as separate committees to manage


<PAGE>


                  the  research  phase  and  pre-clinical  phase of the  Back-up
                  Program) and such  committees  will be  constituted as the JRC
                  agrees.

                  (v)  Meetings.  The JRC will  meet  regularly  according  to a
                  mutually agreed schedule.

         2a.3     Research Plan.

(i)                 Agreement on Research  Plan.  Promptly  after the  Amendment
                    Effective Date, the Parties shall meet and mutually agree on
                    a plan for the conduct of the Back-up  Program (the "Plan").
                    The Plan will  outline the Back-up  Program  objectives  and
                    timeline and describe the activities to be conducted by each
                    Party. The JRC shall review the Plan on an ongoing basis and
                    approve  changes thereto as the JRC deems  appropriate.  The
                    Plan  shall  be  consistent  with  this  paragraph  2a.3 and
                    consistent with each Party's available resources. An initial
                    Plan is outlined in Exhibit B.

(ii)                Efforts.  The Plan will include general  responsibilities of
                    Neurocrine and Janssen FTEs devoted to the Back-up  Program.
                    Neurocrine    will    commit   to    devote    approximately
                    ***************  FTEs in total to the conduct of the Back-up
                    Program.  Janssen  will  play an  active  role  in both  the
                    research phase and pre-clinical phase of the Back-up Program
                    and commit resources accordingly.

(iii) Responsibilities.

(A)                          Neurocrine. The Parties have agreed that Neurocrine
                             will be responsible for the initial identification,
                             synthesis  and  pharmacological  and  toxicological
                             profiling of PCCs,  including  Back-up PCCs, during
                             the Back-up  Program.  This will include  medicinal
                             chemistry,   synthesis   scale  up,  in  vitro  CRF
                             receptor studies, in vivo  pharmacological  studies
                             related to depression, anxiety and substance abuse,
                             pharmacokinetics,     non-GLP     toxicology    and
                             teratogenicity screening.

(B)                          Janssen.  The Parties have agreed that Janssen will
                             be  responsible  for  testing  of  PCCs,  including
                             Back-up PCCs,  which are suitably  scaled up in the
                             ***************************************************
                             and for GLP toxicology.  Subject to the obligations
                             imposed by sub-Paragraph 2a.1(ii) and regardless of
                             2a.2(ii),  Janssen  shall  have  final say of which
                             compounds are scaled up for further  testing at any
                             point where scale up from the initial  synthesis is
                             necessary.  Any decision on which Janssen has final
                             say will be  consistent  with the  objective of the
                             Plan and with timelines contained therein.

         2a.4 Identification of Preliminary Back-up Candidate. The determination
         of whether a Preliminary  Back-up Candidate has been identified will be
         based upon the good faith results of the above mentioned animal models.
         In the case of the *****************


<PAGE>


         ****************************************, the model may be run a second
         time and the average result will be  determinative.  In the case of the
         ********************   **************,   the  first   results  will  be
         determinative.

         2a.5  Collaboration  Tangible  Research  Products.  During the  Back-up
         Program Term each Party shall use reasonable  efforts to make available
         to the other,  Collaboration  Tangible  Materials  to the  extent  such
         transfer  shall be  reasonably  necessary  for a party to conduct their
         responsibilities under the Plan.

         2a.6 Reports.  Janssen and Neurocrine  will use  reasonable  efforts to
         make available and disclose to one another Information known by Janssen
         or Neurocrine on the Amendment  Effective Date that directly relates to
         the scope of the  Back-up  Program.  During the  Back-up  Program  Term
         Janssen and Neurocrine  will use reasonable  efforts to disclose to one
         another  Information  regarding  compounds  synthesized  or discovered,
         initial  leads,  activities  of leads,  derivatives,  and results of in
         vitro and in vivo  studies  arising in the course of the conduct of the
         Back-up Program.  Notwithstanding the foregoing, the Parties agree that
         Information  disclosed during the course of the Back-up Program will be
         limited to  Information  within the scope of the  Back-up  Program  the
         disclosure of which is reasonably  necessary for the Parties to conduct
         the Back-up  Program in accordance  with the Plan.  Consistent with the
         above,  each  Party  will  provide  the  other  with  raw data for work
         conducted in the course of the Back-up Program to the extent reasonably
         requested by the other Party.

         2a.7     Funding.

(i)               Prior Efforts. In consideration of research conducted and data
                  and information generated prior to the Effective Date, Janssen
                  will              pay              to               Neurocrine
                  ****************************************  within  thirty  (30)
                  days of the Amendment Effective Date.

                  (ii)  FTEs.  Janssen  will  reimburse   Neurocrine  for  costs
                  associated   with  the  conduct  of  the  Back-up  Program  by
                  Neurocrine    personnel    by    providing    funding    equal
                  **************************************************         per
                  calendar  quarter  for the Back-up  Program  Term or until the
                  total                   sum                    ***************
                  ****************************************************  is paid.
                  Such  funding  shall  be  provided  in  advance  in  quarterly
                  installments.  The  payments  for the first and last  quarters
                  shall be prorated to reflect the April 15, 1999 effective date
                  for the Back-up Program Term with the first such payment being
                  due and payable  within  thirty (30) days after the  Amendment
                  Effective  Date and the first  payment  shall include past due
                  amounts for calendar  1999 as well as the advance  payment for
                  the fourth quarter of 1999.

                  (iii)  Outside  Costs.  Janssen  will be  responsible  for all
                  outside and third party costs  associated with Back-up Program
                  activities approved by the JRC in the Plan including the costs
                  associated  with third party  contractors  retained to perform
                  tasks  approved by the JRC. In addition,  Janssen may elect to
                  have third party


<PAGE>


                  contractors  reasonably  acceptable to Neurocrine perform some
                  of Janssen's  obligations under the Plan to the extent Janssen
                  is unable to perform the task  internally  within the approved
                  timeline  or  when  Janssen  otherwise  deems  it  appropriate
                  consistent with the goals of the Back-up  Program.  Similarly,
                  Neurocrine  may  elect  to use  third  party  contractors  for
                  certain toxicology,  manufacturing and other tasks approved by
                  the JRC.  Janssen will be responsible for all such third party
                  costs. Regardless of 2a.2(ii), Janssen shall have final say as
                  to all outside and third Party Costs  associated  with Back-up
                  Program activities,  including the costs associated with Third
                  Party  contractors  retained to perform tasks  approved by the
                  JRC.  Any  decision  on which  Janssen  has  final say will be
                  consistent  with the objectives of the Plan and with timelines
                  contained therein.

                  (iv) Records.  Neurocrine will maintain  complete and accurate
                  records relevant to the expenditure of Back-up Program funding
                  hereunder.  Such  records  shall  be  open  during  reasonable
                  business  hours for a period of three (3) years  from the date
                  of creation of such  records for the sole  purpose of allowing
                  Janssen to verify payments hereunder.

         2a.8     Milestones

                  (i)  Payments.  Within  thirty (30) days  following  the first
                  occurrence  of the events set forth below,  Janssen shall make
                  the following one-time milestone payments to Neurocrine:

                  Event Payment
                  Identification of Preliminary Back-up Candidate,
                  which Preliminary Back-up Candidate ******
                  *******************************************
                  ***********************************

                  Filing and  acceptance for review of an IND or equivalent in a
                  country of the European Union of a PCC, including Back-up PCC,
                  discovered, identified or synthesized or developed
                  in the Back-up Program *************

                  In the event the event that the  milestone on  acceptance  for
                  review   of  an  IND  is   paid,   then  the   milestone   for
                  identification of a Preliminary Back-up Candidate will be paid
                  where  it  was  previously  unpaid.  The  milestones  of  this
                  Paragraph will be paid in total only once.  Milestone payments
                  based on further post IND  development  of a PCC  developed in
                  the scope of the Back-up Program will be subject to any unpaid
                  milestones under Paragraph 6.3.

                  (ii) Diligence. In the event that Janssen has not incurred the
                  obligation       to      pay      the       milestone      for
                  *********************************************,  then  upon the
                  later       of      six       (6)       months       following
                  ********************************** or


<PAGE>


nine              (9)  months   following   ************************************
                  **************************************************************
                  **************************************************************
                  agrees  to  either  (A) pay such  milestone  *****************
                  ******************************,   or  (B)  on  a  compound  by
                  compound    basis    *****************************************
                  **************************************************************
                  **************************************************************
                  **************************************************************
                  ***********************************************.
                  The return of rights  under this  sub-Paragraph  will  include
                  rights to all data and  information and be free of any royalty
                  obligation to Janssen.

                  (iii)   In   the    event    that    the    milestone    for
                  **************************************************************
                  **************************************** and the Milestone For
                  **************************************************************
                  *************************************************************
                  *************************************************************,
                  then Janssen agrees to pay such  milestone for  identification
                  of a Back-up  Preliminary  Candidate at the time the milestone
                  is paid pursuant to 2a.8(i) or 2a.8(ii).

         2a.9 Royalties.  Janssen will pay to Neurocrine  Royalties on Net Sales
         of PCCs  developed in the scope of the Back-up  Program as set forth in
         Article VI.

         2a.10    Clinical Development and Commercialization.

(i)                 Clinical Development. Clinical development of PCCs developed
                    in the course of the Back-up  Program  will be  conducted in
                    accordance with Article III.

(ii)                Commercialization.  Commercialization  of PCCs  developed in
                    the  course of the  Back-up  Program  will be  conducted  in
                    accordance with Article IV.

(iii)               Manufacture.   Janssen   shall   be   responsible   for  the
                    manufacture  of PCCs  developed  in the scope of the Back-up
                    Program consistent with Article VII.

(iv)                Indemnification.  For  the  purposes  of  Article  XII,  the
                    conduct  of  the  Back-up  Program  shall  be  considered  a
                    Research and Development activity.

         2a.11    Licenses and Patents.

(i)                 Back-up  Program.  Janssen  hereby  grants to  Neurocrine  a
                    non-exclusive  license under the Janssen Patents and Program
                    Patents  as shall be  reasonably  necessary  or  useful  for
                    Neurocrine to conduct the Back-up Program. Neurocrine hereby
                    grants  to  Janssen  a   non-exclusive   license  under  the
                    Neurocrine  Patents  (including  Neurocrine Back-up Patents)
                    and  Program  Patents as shall be  reasonably  necessary  or
                    useful for Janssen to conduct the Back-up Program.
(ii)

<PAGE>


                  Janssen.  Janssen will receive  rights and assume  obligations
                    consistent  with Article IX for any back-up  Program Patents
                    that are  determined  during  the  Back-up  Program  Term to
                    actually  contain  a PCC  to  the  extent  Janssen  did  not
                    previously  have  such  rights  and  obligations.  Upon  the
                    determination  that all or a portion of a Neurocrine Back-up
                    Patent  is  a  Program   Patent,   Janssen  will   reimburse
                    Neurocrine for past fees and expenses  incurred with respect
                    to all or part of such Patent,  as the case may be, prior to
                    such   determination.   Thereafter,   Janssen   will  assume
                    responsibility  for  such  Program  Patent  consistent  with
                    Article IX.

         2a.12   Exclusivity/   Non-Competition.   Janssen   acknowledges   that
         Neurocrine has informed  Janssen that during the period between the end
         of the Research Term and the Amendment  Effective Date,  Neurocrine has
         conducted an internal  research  program  directed to the discovery and
         characterization  of CRF Antagonist  compounds which do not fall within
         the scope of the  Program  Patents  ("Neurocrine  Compounds")  with the
         intention  of   developing   these   compounds  for  stroke  and  other
         indications that would not be categorized as anxiety, depression and/or
         drug abuse  within the time  periods  dictated by  Paragraph  10.3 and,
         following the expiration of the limitations  imposed by Paragraph 10.3,
         expanding the development of these compounds to anxiety, depression and
         drug  abuse  should  the   compounds   demonstrate   activity  in  such
         indications.  Neurocrine  has also informed  Janssen that  Neurocrine's
         willingness to conduct the Back-up  Program is conditioned on Janssen's
         recognition  of  Neurocrine's  continued  right to conduct  independent
         research and development of CRF Antagonist compounds.  It is understood
         that     **************************************************************
         **************************     entitles     the    Parties    to    use
         ********************  *******************  for any  purpose  subject to
         obligations of  confidentiality in Article VIII. This would include the
         use  of   ******************************  in  the  development  of  the
         ********************.

         2a.13    Termination.

(i)               Convenience.  In the event  Janssen  shall elect to  terminate
                  this  Agreement  under  Paragraph  11.6,  Janssen shall pay to
                  Neurocrine  all  amounts  that would have been  payable  under
                  Paragraphs 2a.7(ii) (up to ********************) and reimburse
                  Neurocrine  for  all  noncancelable  obligations  incurred  by
                  Neurocrine for JRC approved activities.

(ii) Breach.  Notwithstanding  the  provisions  of paragraph  11.2, in the event
either Party shall default in  ---------------  the  performance of any material
obligation  set forth in this  Article II A, the sole  remedy of the other Party
shall be termination of the Back-up  Program.  In the event the Back-up  Program
shall be  terminated  by reason of a default by  Janssen,  Janssen  shall pay to
Neurocrine all amounts that would have been payable under paragraph 2a.7(ii) and
(iii),  grant to  Neurocrine an exclusive  license under the Program  Patents to
make,  use and sell Back-up PCCs which are  Preliminary  Back-up  Candidates and
reimburse  Neurocrine for all noncancelable  obligations  incurred by Neurocrine
for JRC approved activities. In the event the (iii)

<PAGE>


                  Back-up  Program shall be terminated by reason of a default by
                  Neurocrine,  Neurocrine  will  return to Janssen  the  initial
                  payment and any milestone  payments made by Janssen  hereunder
                  and any Neurocrine  Back-up Patent and Back-up  Program Patent
                  that  contains  a  Preliminary   Back-up   Candidate  will  be
                  considered a Program  Patent which  contains in each  chemical
                  genus  thereof at least one member  which is a PCC meeting the
                  requirements of Paragraph 1.38 (c)(i).

                  (iii)  Early  Termination.  Janssen  shall  have the  right to
                  terminate  the  Back-up  Program  as   ****************   upon
                  delivering  notice of its intention to do so by *************.
                  Upon such termination,  Janssen will reimburse  Neurocrine for
                  noncancelable  obligations  incurred  by  Neurocrine  for  JRC
                  approved  activities  and  thereafter  shall  have no  further
                  obligation  to fund the  conduct  of the  Back-up  Program  by
                  Neurocrine.   Janssen  will  retain  all  rights,   patent  or
                  otherwise, to PCCs which are such by the terms of the Original
                  Agreement except that any development of such a PCC by Janssen
                  which was discovered,  identified, synthesized or developed in
                  the Back-up Program will be subject to the milestone  payments
                  herein. Upon such termination,  Neurocrine will retain all its
                  rights, patent or otherwise, to any compound which, except for
                  the terms of this Amendment would not be a PCC. The definition
                  of  Program  Patent  would  return  to  that  of the  Original
                  Agreement.    Neurocrine's    retained   rights   under   this
                  sub-Paragraph  will  be  free  of any  royalty  obligation  to
                  Janssen and include all rights to data.


                                    ARTICLE V
                                  MISCELLANEOUS

5.1 Assignment. Either Party may assign this Amendment or its ownership interest
in jointly owned Program Patents:  (i) to a party that succeeds to substantially
all of the  business  or assets of such  Party by reason of a merger or  similar
reorganization  or the sale of substantially  all of its business or assets,  or
(ii) otherwise with the prior written consent of the other Party. This Amendment
shall be binding upon and inure to the benefit of the  successors  and permitted
assigns of the Parties.  Any  assignment  not in accordance  with this Amendment
shall be void.

5.2 Force Majeure. Neither Party shall lose any rights hereunder or be liable to
the other  Party for damages or losses on account of failure of  performance  by
the  defaulting  Party if the failure is occasioned by government  action,  war,
fire,  explosion,  flood,  strike,  lockout,  embargo,  act of God, or any other
similar  cause beyond the control of the  defaulting  Party,  provided  that the
Party  claiming  force  majeure has exerted all  reasonable  efforts to avoid or
remedy such force majeure; provided,  however, that in no event shall a Party be
required to settle any labor dispute or disturbance.

5.3. Further Actions. Each Party agrees to execute, acknowledge and deliver such
further  instruments,  and to do all such other  acts,  as may be  necessary  or
appropriate in order to carry out the purposes and intent of this Amendment



<PAGE>


5.4 Waiver.  Except as specifically provided for herein, the waiver from time to
time by  either  of the  Parties  of any of their  rights  or their  failure  to
exercise any remedy shall not operate or be construed as a continuing  waiver of
same or of any  other  of such  Party's  rights  or  remedies  provided  in this
Amendment.

5.5  Severability.  If any term,  covenant or condition of this Amendment or the
application  thereof to any Party or circumstance  shall, to any extent, be held
to be invalid or unenforceable, then (i) the remainder of this Amendment, or the
application  of such term,  covenant or  condition  to Parties or  circumstances
other than those as to which it is held invalid or  unenforceable,  shall not be
affected thereby and each term, covenant or condition of this Amendment shall be
valid and be enforced  to the  fullest  extent  permitted  by law;  and (ii) the
Parties  hereto  covenant and agree to  renegotiate  any such term,  covenant or
applicable  thereof in good faith in order to  provide a  reasonably  acceptable
alternative  to the  term,  covenant  or  condition  of  this  Amendment  or the
application thereof that is invalid or unenforceable, it being the intent of the
Parties that the basic purposes of this Agreement are to be effectuated.

5.6  Counterparts.  This Amendment may be executed in two or more  counterparts,
each of which  shall be  deemed an  original,  but all of which  together  shall
constitute one and the same instrument.

5.7 Entire Agreement. The Original Agreement as amended hereby, the accompanying
Stock  Purchase  Agreement   ***************************************************
******  set  forth  all  the  covenants,   promises,   agreements,   warranties,
representations,  conditions and  understandings  between the Parties hereto and
supersede and  terminate  all prior  agreements  and  understanding  between the
Parties.   There   are   no   covenants,   promises,   agreements,   warranties,
representations,  conditions or understandings,  either oral or written, between
the  Parties  other  than  as  set  forth  herein  and  therein.  No  subsequent
alteration,  amendment,  change or addition to this  Amendment  shall be binding
upon the Parties  hereto unless  reduced to writing and signed by the respective
authorized officers of the Parties.

  5.8  Relationship of Parties.  Nothing herein shall be construed to create any
  relationship  of employer and employee,  agent and  principal,  partnership or
  joint venture  between the Parties.  Each Party is an independent  contractor.
  Neither Party shall assume, either directly or indirectly, any liability of or
  for the  other  Party.  Neither  Party  shall  have the  authority  to bind or
  obligate the other Party and neither  Party shall  represent  that it has such
  authority.




<PAGE>


                                       14

IN WITNESS  WHEREOF,  the Parties have  executed  this  Amendment as of the date
first written above.

NEUROCRINE BIOSCIENCES, INC.


/s/Gary Lyons
By: Gary Lyons
President & CEO



JANSSEN PHARMACEUTICA, N.V.

/s/Dr. Alan Dunton
By: Dr. Alan Dunton
President



<PAGE>

                     [***] CONFIDENTIAL TREATMENT REQUESTED
                                    EXHIBIT A

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

<PAGE>


                                    EXHIBIT B


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



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