CELLEGY PHARMACEUTICALS INC
S-3, EX-4.1, 2000-11-07
PHARMACEUTICAL PREPARATIONS
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                                                                     Exhibit 4.1

                          CELLEGY PHARMACEUTICALS, INC.
                         COMMON STOCK PURCHASE AGREEMENT

         THIS COMMON STOCK PURCHASE  AGREEMENT  (this  "Agreement")  is made and
entered into as of October 2, 2000 by and among Cellegy Pharmaceuticals, Inc., a
California  corporation (the "Company"),  and the parties listed on the Schedule
of Investors separately delivered to the Investors (the "Schedule of Investors")
(each  hereinafter  individually  referred to as an "Investor" and  collectively
referred to as the "Investors").

         1. AGREEMENT TO PURCHASE AND SELL STOCK.

                1.1  Authorization.  As of the Closing  (as  defined  below) the
Company will have authorized the issuance,  pursuant to the terms and conditions
of this Agreement, of up to 1.5 million shares of the Company's Common Stock, no
par value (the "Common Stock").

                1.2 Agreement to Purchase and Sell.  The Company  agrees to sell
to each  Investor at the Closing,  and each Investor  agrees,  severally and not
jointly,  to purchase  from the Company at the Closing,  the number of shares of
Common Stock for the aggregate  price set forth beside such  Investor's  name on
the Schedule of Investors, at the price per share for such Investor set forth on
the  Schedule  of  Investors.  The  shares of Common  Stock  purchased  and sold
pursuant to this Agreement will be collectively  hereinafter  referred to as the
"Purchased Shares."

         2. CLOSING.

                2.1 The Closing.  The purchase and sale of the Purchased  Shares
will take  place at the  offices of  Fenwick & West LLP,  Two Palo Alto  Square,
Suite 800, Palo Alto, California,  at 2:30 p.m. Pacific Time, on October 2, 2000
or at such other time and place as the Company and  Investors who have agreed to
purchase a majority of the Purchased  Shares listed on the Schedule of Investors
mutually  agree upon (which time and place are referred to in this  Agreement as
the "Closing"),  provided that the closing may not be delayed for more than five
business days without the consent of all Investors.  At the Closing, the Company
will deliver to each Investor a certificate representing the number of Purchased
Shares  that such  Investor  has agreed to  purchase  hereunder  as shown on the
Schedule of Investors  against  delivery to the Company by such  Investor of the
full purchase price of such Purchased Shares, paid by (i) a check payable to the
Company's  order,  (ii)  wire  transfer  of funds to the  Company  or (iii)  any
combination of the foregoing.

         3.  REPRESENTATIONS  AND WARRANTIES OF THE COMPANY.  The Company hereby
represents and warrants to Investor that,  except as set forth in the Disclosure
Schedule and  Schedule of  Exceptions  (the  "Disclosure  Schedule")  separately
delivered by the Company to the Investors  (which  Disclosure  Schedule shall be
deemed to be  representations  and  warranties  to the  Investors by the Company
under this Section and to qualify each of the representations and warranties set
forth herein),  the statements in the following paragraphs of this Section 3 are
all true and correct:
<PAGE>

                  3.1 Organization, Good Standing and Qualification. The Company
is a corporation duly organized, validly existing and in good standing under the
laws of the  State of  California,  and has all  requisite  corporate  power and
authority  to conduct  its  business  as  currently  conducted.  The  Company is
qualified to do business as a foreign  corporation  in each  jurisdiction  where
failure to be so  qualified  could  reasonably  be  expected  to have a material
adverse  effect on the  business,  assets,  financial  condition  or  results of
operations or assets of the Company (the "Business") (such effect referred to as
a "Material Adverse Effect").

                  3.2   Capitalization.   Immediately  before  the  Closing  the
capitalization of the Company will consist of the following:

                           (a) Preferred Stock. A total of 5,000,000  authorized
shares of Preferred Stock, no par value per share (the "Preferred Stock"),  none
of which are issued and outstanding.

                           (b) Common Stock.  A total of  20,000,000  authorized
shares of Common Stock, of which approximately 12,262,614 shares were issued and
outstanding as of September 27, 2000.

                           (c) Options,  Warrants,  Reserved Shares. Except for:
(i) the approximately 2,523,711 shares of Common Stock issuable upon exercise of
options  outstanding  as  of  September  27,  2000,  (ii)  approximately  75,500
additional shares of Common Stock reserved for issuance under the Company's 1995
Directors Stock Option Plan, (iii) approximately  1,100,789 additional shares of
Common Stock  reserved for issuance  under the Company's  1995 Equity  Incentive
Plan and (iv)  warrants to  purchase an  aggregate  of  approximately  1,034,200
shares of Common Stock, there are not outstanding any options,  warrants, rights
or agreements for the purchase or acquisition  from the Company of any shares of
its capital stock or any securities convertible into or ultimately  exchangeable
or exercisable for any shares of the Company's capital stock.

                  3.3 Subsidiaries.  Except for Cellisis Pharmaceuticals,  Inc.,
Cellegy Australia Pty Ltd, and Cellegy International, Inc., each of which is not
a  "significant  subsidiary"  as defined  in Rule 1-02 of  Regulation  S-X,  the
Company does not presently own or control, directly or indirectly,  any interest
in any other corporation,  partnership,  trust, joint venture,  association,  or
other entity.

                  3.4 Due Authorization;  No Violation.  All corporate action on
the part of the Company and its officers,  directors and shareholders  necessary
for the  authorization,  execution and delivery of, and the  performance  of all
obligations  of the  Company  under,  this  Agreement,  and  the  authorization,
issuance,  reservation for issuance and delivery of all of the Purchased  Shares
being sold under this  Agreement,  has been taken or will be taken  prior to the
Closing,  and this Agreement  constitutes a valid and legally binding obligation
of the Company,  enforceable  against the Company in accordance  with its terms,
except  as  enforceability   may  be  limited  by  (i)  applicable   bankruptcy,
insolvency,  reorganization or other laws of general application  relating to or
affecting the enforcement of creditors'  rights generally and (ii) the effect of
rules of law  governing  the  availability  of equitable  remedies.  Neither the
execution,  delivery or  performance  by the Company of this  Agreement  nor the
consummation  by the Company of the  transactions  contemplated  hereby will (i)
conflict with or result in a breach of any provision of the Restated


                                       2
<PAGE>

Articles  of  Incorporation  of the Company  (the  "Restated  Articles")  or the
Company's  Bylaws,  (ii) conflict  with,  result in a violation or breach of, or
cause a  default  (or give  rise to any right of  termination,  cancellation  or
acceleration) under any of the terms, conditions or provisions of any agreement,
instrument or  obligation  to which the Company is a party,  which default could
reasonably  be expected to have a Material  Adverse  Effect or (iii) violate any
law, statute, rule or regulation or judgment,  order, writ, injunction or decree
of any  governmental  authority,  in each case  applicable to the Company or its
properties  or  assets  and  which,  individually  or in  the  aggregate,  could
reasonably be expected to have a Material Adverse Effect.

                  3.5  Valid  Issuance  of Stock.  The  Purchased  Shares,  when
issued,  sold and delivered in accordance  with the terms of this  Agreement for
the consideration  provided for herein,  will be duly and validly issued,  fully
paid and nonassessable and are not subject to preemptive or other similar rights
of any shareholder of the Company.

                  3.6  Governmental  Consents.  No consent,  approval,  order or
authorization of, or registration,  qualification,  designation,  declaration or
filing with, any federal,  state or local governmental  authority on the part of
the Company is required in connection  with the valid  execution and delivery of
this Agreement,  the offer,  sale and issuance of the Purchased  Shares,  or the
consummation of the  transactions  contemplated  by this  Agreement,  except for
qualifications  or filings  under the  Securities  Act of 1933,  as amended (the
"Act") and the applicable rules and regulations (the "Rules and Regulations") of
the Securities and Exchange Commission (the "Commission") under the Act, and all
other  applicable  securities  laws as may be  required in  connection  with the
transactions  contemplated by this Agreement.  All such  qualifications  will be
effective  on the  Closing,  and all  such  filings  be  made  within  the  time
prescribed by law.

                  3.7 Absence of Changes. After the respective dates as of which
information is given in the Company's  Proxy Statement for the annual meeting of
shareholders  held on May 31, 2000, the Company's Annual Report on Form 10-K for
the year ended  December 31, 1999,  and the Company's  Quarterly  Report on Form
10-Q for the quarter ended June 30, 2000, respectively (such documents, together
with the  Disclosure  Schedule,  referred  to  collectively  as the  "Disclosure
Documents"), there has not been (i) any material adverse change in the Business,
(ii) any  transaction  that is material to the  Company,  (iii) any  obligation,
direct or contingent,  that is material to the Company, incurred by the Company,
(iv) any change in the outstanding  indebtedness of the Company that is material
to the Company, (v) any dividend declared,  paid or made on the capital stock of
the Company or (vi) any loss or damage  (whether or not insured) to the property
of the Company which has been  sustained  which could  reasonably be expected to
have a Material Adverse Effect.

                  3.8 Litigation.  There is no action, suit, proceeding,  claim,
arbitration or investigation ("Action") pending (or, to the Company's knowledge,
currently threatened) against the Company, its activities, properties or assets,
which (i) might prevent the consummation of the transactions contemplated hereby
or (ii) if adversely  resolved  against the Company could reasonably be expected
to have a Material Adverse Effect.

                  3.9 Nasdaq Listing. The Common Stock is registered pursuant to
Section 12(g) of the Securities  Exchange Act of 1934, as amended (the "Exchange
Act"),  and is listed on the Nasdaq Stock Market (Nasdaq National  Market).  The
Company has not received any  notification  that the  Commission or the National
Association of Securities Dealers, Inc. is


                                       3
<PAGE>

contemplating the termination of such registration or listing.  Before the Shelf
Registration  Statement (as defined in Section 7.2) is declared effective by the
Commission,  the Purchased  Shares will, if required by the listing rules of the
Nasdaq  Stock  Market,  have been  approved  for  quotation  on the Nasdaq Stock
Market, subject to notice of issuance.

                  3.10  Exchange Act Filings.  The Company has filed in a timely
manner all reports and other  information  required to be filed ("Filings") with
the Commission pursuant to the Exchange Act during the preceding twelve calendar
months. On their respective dates of filing,  the Filings complied as to form in
all  material  respects  with the  requirements  of the  Exchange  Act,  and the
published rules and  regulations of the Commission  promulgated  thereunder.  On
their  respective  dates of  filing,  the  Filings  did not  include  any untrue
statement of a material fact required to be stated  therein or necessary to make
the statements  therein,  in light of the circumstances in which they were made,
not  misleading,  and all financial  statements  contained in the Filings fairly
present the  financial  position of the Company on the dates of such  statements
and the results of operations for the periods covered thereby in accordance with
generally accepted  accounting  principles  consistently  applied throughout the
periods involved and prior periods,  except as otherwise  indicated in the notes
to such financial statements.

                  3.11 Disclosure.  The  representations  and warranties made by
the  Company in this  Agreement  (including  the  Disclosure  Schedule)  and the
Filings  when read  together do not contain any untrue  statement  of a material
fact and do not omit to state a material fact  necessary to make the  statements
herein as a whole not misleading.

                  3.12  Governmental  Permits,  Etc. The Company  possesses  all
licenses,  franchises,  governmental  approvals,  permits or other  governmental
authorizations (collectively, "Authorizations") relating to the operation of the
Business,  except for those Authorizations the failure of which to possess would
not,  separately or in the aggregate,  have a Material  Adverse  Effect.  To the
Company's knowledge after reasonable investigation, the Company is in compliance
with the terms of all Authorizations and all laws,  ordinances,  regulations and
decrees which to the Company's knowledge are applicable to the Business,  except
for such non-compliance  which does not, separately or in the aggregate,  have a
Material Adverse Effect.

                  3.13  Insurance.  The  Company is covered  by  insurance  with
companies  the  Company  believes  to be  responsible  and in such  amounts  and
covering  such  risks as it  believes  to be  adequate  for the  conduct  of its
Business  and the value of its  properties  and as is  customary  for  companies
engaged  in  similar  businesses  in  similar  industries.  The  Company  has no
knowledge  that any such  carrier  has  grounds  or intends to cancel or fail to
renew such policies.

                  3.14 Intellectual  Property.  To the Company's knowledge after
reasonable  investigation,  the Company  owns or possesses  the patents,  patent
rights, licenses, inventions,  copyrights, know-how (including trade secrets and
other unpatented and/or  unpatentable  proprietary or confidential  information,
systems or  procedures)  and other rights or interests in items of  intellectual
property as are necessary for the operation of the Business  operated by it (the
"Patent and  Proprietary  Rights"),  except  where the failure to own or possess
such  rights  would not have a Material  Adverse  Effect;  the  Company  has not
received  notice of any  asserted  rights with  respect to any of the Patent and
Proprietary  Rights  which,  if  determined  unfavorably  with  respect  to  the
interests of the Company would have a Material  Adverse Effect;  and the Company
has not received notice or is otherwise aware of any infringement of or conflict
with


                                       4
<PAGE>

asserted  rights of others  with  respect  to any of the  Patent or  Proprietary
Rights,  which  infringement  or  conflict  (if the  subject of any  unfavorable
decision, ruling or finding),  individually or in the aggregate, would result in
a Material Adverse Effect.

         4.  REPRESENTATIONS,  WARRANTIES  AND CERTAIN  AGREEMENTS OF INVESTORS.
Each Investor  hereby  represents and warrants to, and agrees with, the Company,
that:

                  4.1  Authorization.  All  corporate  action on the part of the
Investor  and  its  officers,  directors  and  stockholders  necessary  for  the
authorization, execution and delivery of, and the performance of all obligations
of the Investor  under,  this Agreement has been taken or will be taken prior to
the  Closing,  and  this  Agreement  constitutes  a valid  and  legally  binding
obligation of the Investor,  enforceable against the Investor in accordance with
its terms, except as enforceability may be limited by (i) applicable bankruptcy,
insolvency,  reorganization or other laws of general application  relating to or
affecting the enforcement of creditors'  rights generally and (ii) the effect of
rules of law governing the availability of equitable remedies.

                  4.2  Purchase  for Own  Account.  The  Purchased  Shares to be
purchased by such Investor  hereunder  will be acquired for  investment for such
Investor's  own account,  not as a nominee or agent,  and not with a view to the
public resale or  distribution  thereof  within the meaning of the Act, and such
Investor has no present intention of selling,  granting any participation in, or
otherwise  distributing  the same.  If not an  individual,  such  Investor  also
represents  that such  Investor has not been formed for the specific  purpose of
acquiring Purchased Shares.

                  4.3  Disclosure  of  Information.  The Investor has received a
copy of the Disclosure  Documents and has received or has had full access to all
the  information  it  considers  necessary  or  appropriate  to make an informed
investment  decision with respect to the Purchased Shares to be purchased by the
Investor under this  Agreement.  Investor  further has had an opportunity to ask
questions  and  receive  answers  from  the  Company  regarding  the  terms  and
conditions  of the  offering of the  Purchased  Shares and to obtain  additional
information  (to the extent the  Company  possessed  such  information  or could
acquire it  without  unreasonable  effort or  expense)  necessary  to verify any
information  furnished to the Investor or to which the Investor had access.  The
foregoing,  however, does not in any way limit or modify the representations and
warranties made by the Company in Section 3.

                  4.4 Investment Experience.  Such Investor understands that the
purchase of the Purchased Shares involves  substantial risk. Such Investor:  (i)
has  experience  as an investor in  securities  of companies in the  development
stage and acknowledges  that such Investor is able to fend for itself,  can bear
the economic risk of such Investor's  investment in the Purchased Shares and has
such  knowledge  and  experience  in  financial  or business  matters  that such
Investor is capable of evaluating the merits and risks of this investment in the
Purchased  Shares and  protecting  its own  interests  in  connection  with this
investment and/or (ii) has a preexisting personal or business  relationship with
the Company and certain of its officers,  directors or controlling  persons of a
nature and duration  that enables  such  Investor to be aware of the  character,
business acumen and financial circumstances of such persons.

                                       5
<PAGE>

                  4.5 Accredited  Investor Status.  Unless  otherwise  expressly
indicated on the Schedule of Investors to this  Agreement,  such  Investor is an
"accredited  investor" within the meaning of Regulation D promulgated  under the
Act.

                  4.6 Restricted Securities.  Such Investor understands that the
Purchased  Shares are  characterized  as "restricted  securities"  under the Act
inasmuch  as they are being  acquired  from the  Company  in a  transaction  not
involving a public offering and that under the Act and the Rules and Regulations
such securities may be resold without registration under the Act only in certain
limited  circumstances.  In this connection,  such Investor represents that such
Investor is familiar with Rule 144 of the Commission and  understands the resale
limitations  imposed thereby and by the Act. Such Investor  understands that the
Company is under no obligation to register any of the Purchased Shares except as
provided in Section 7 below.

                  4.7 Further  Limitations  on  Disposition.  Without in any way
limiting the  representations  set forth above, such Investor further agrees not
to make any disposition of all or any portion of the Purchased Shares unless and
until:

                           (a) there is then in effect a registration  statement
under the Act covering such proposed disposition and such disposition is made in
accordance with such  registration  statement and the provisions of Section 7 of
this Agreement; or

                           (b) (i) such Investor shall have notified the Company
of the  proposed  disposition  and  shall  have  furnished  the  Company  with a
statement of the circumstances  surrounding the proposed  disposition,  and (ii)
such Investor shall have furnished the Company,  at the expense of such Investor
or its transferee,  with an opinion of counsel,  reasonably  satisfactory to the
Company,  that such disposition will not require registration of such securities
under the Act.

                Notwithstanding  the provisions of paragraphs (a) and (b) above,
no such registration  statement or opinion of counsel shall be required: (i) for
any routine transfer of any Purchased Shares in compliance with Rule 144 or Rule
144A  (except  that an opinion of counsel may be required for other than routine
Rule 144  transactions),  or (ii) for any  transfer  of  Purchased  Shares by an
Investor  that  is a  partnership  or a  corporation  to (A) a  partner  of such
partnership or shareholder  of such  corporation,  or (B) the estate of any such
partner or  shareholder,  or (iii) for the  transfer by gift,  will or intestate
succession  by any  Investor  to his or her  spouse  or  lineal  descendants  or
ancestors or any trust for any of the foregoing;  provided,  that in each of the
foregoing  cases the transferee  agrees in writing to be subject to the terms of
this Section 4 (other than Section 4.5) to the same extent as if the  transferee
were an original Investor hereunder.

                  4.8 Legends. It is understood that the certificates evidencing
the Purchased Shares will bear the legends set forth below:

                           (a) THE SECURITIES  REPRESENTED  HEREBY HAVE NOT BEEN
REGISTERED  UNDER THE SECURITIES  ACT OF 1933, AS AMENDED (THE "ACT"),  OR UNDER
THE  SECURITIES  LAWS  OF  CERTAIN  STATES.  THESE  SECURITIES  ARE  SUBJECT  TO
RESTRICTIONS ON TRANSFERABILITY  AND RESALE AND MAY NOT BE TRANSFERRED OR RESOLD
EXCEPT AS PERMITTED  UNDER


                                       6
<PAGE>

THE ACT AND THE APPLICABLE STATE  SECURITIES  LAWS,  PURSUANT TO REGISTRATION OR
EXEMPTION THEREFROM. INVESTORS SHOULD BE AWARE THAT THEY MAY BE REQUIRED TO BEAR
THE FINANCIAL  RISKS OF THIS  INVESTMENT  FOR AN INDEFINITE  PERIOD OF TIME. THE
ISSUER OF THESE  SECURITIES  MAY  REQUIRE  AN  OPINION  OF  COUNSEL  IN FORM AND
SUBSTANCE SATISFACTORY TO THE ISSUER TO THE EFFECT THAT ANY PROPOSED TRANSFER OR
RESALE IS IN COMPLIANCE WITH THE ACT AND ANY APPLICABLE STATE SECURITIES LAWS.

                           (b) THE  SHARES  EVIDENCED  BY THIS  CERTIFICATE  ARE
SUBJECT TO THE PROVISIONS OF, AND MAY HAVE CERTAIN  REGISTRATION RIGHTS PURSUANT
TO, THE PROVISIONS OF A PURCHASE  AGREEMENT  BETWEEN THE COMPANY AND THE HOLDER,
WHICH MAY RESTRICT THE TRANSFER OF SUCH SHARES IN CERTAIN CIRCUMSTANCES.  A COPY
OF SUCH AGREEMENT MAY BE OBTAINED,  WITHOUT CHARGE,  AT THE COMPANY'S  PRINCIPAL
OFFICE.

                           (c) After consultation with counsel for the Investor,
any legend that counsel to the Company  reasonably deems  appropriate  under the
laws of the State of California.

         The legends set forth in (a) and (b) above  shall,  upon the request of
an Investor, be promptly removed by the Company from any certificate  evidencing
Purchased  Shares  upon  delivery to the Company of an opinion of counsel to the
Investor, reasonably satisfactory to the Company, that the legended security can
be freely transferred in a public sale without a registration statement being in
effect  under  the Act  and in  compliance  with  exemption  requirements  under
applicable  state securities laws and that such transfer will not jeopardize the
exemption or exemptions from  registration  pursuant to which the Company issued
the Purchased Shares; provided,  however, that no such opinion shall be required
in  connection  with  routine  sales of Purchased  Shares  pursuant to the Shelf
Registration  Statement (as defined below). In connection with any such opinion,
the Investor  shall provide such  certifications  as may be reasonably be deemed
necessary for the delivery of such opinion.

                  4.9  Resale  Restrictions.  To  the  extent  requested  by the
Company or an underwriter or placement agent of securities of the Company,  each
Investor agrees that it will not directly or indirectly offer, sell, contract or
grant an option to sell, pledge,  encumber, or otherwise dispose of or otherwise
transfer, or enter into any swap or other arrangement that transfers to another,
in whole or in part, any of the economic  consequences  of ownership of (whether
any such  transaction  described  above is to be settled by  delivery  of Common
Stock or such other  securities,  in cash or otherwise) (a  "Disposition"),  any
Purchased Shares (other than to donees, shareholders or partners of the Investor
who agree to be similarly bound) from the date such a registration  statement is
filed until up to 90 days after the effective date of a  registration  statement
of the Company relating to an underwritten offering of securities of the Company
filed  under  the Act;  provided,  however,  that (i)  this  paragraph  shall be
applicable  only to the first such  registration  statement of the Company filed
after the date of this Agreement that covers securities to be sold on its behalf
to the public in a firm commitment  underwritten offering and (ii) all executive
officers and directors of the Company then holding Common Stock who beneficially
own more than one percent of the  outstanding  shares of Common Stock enter into
similar


                                       7
<PAGE>

agreements.   This  paragraph   shall  not  preclude   Investor  from  including
Registrable Securities in such registration statement.

         5. CONDITIONS TO INVESTOR'S OBLIGATIONS AT CLOSING.

                  5.1 Closing.  The obligations of each Investor under Section 2
of this Agreement to purchase the Purchased Shares at the Closing are subject to
the  fulfillment or waiver,  on or before the Closing,  of each of the following
conditions,  and the  Company  shall use all  reasonable  efforts  to cause such
conditions to be satisfied on or before the Closing:

                           5.1.1  Representations  and Warranties  True. Each of
the  representations  and warranties of the Company contained in Section 3 shall
be true and correct on and as of the Closing with the same effect as though such
representations and warranties had been made on and as of the Closing.

                           5.1.2  Performance.  The Company shall have performed
and complied with all agreements,  obligations and conditions  contained in this
Agreement  that are required to be performed or complied with by it on or before
the Closing and shall have obtained all approvals,  consents and  qualifications
necessary to complete the purchase and sale described herein.

                           5.1.3 Compliance Certificate.  The Company shall have
delivered to the Investors at the Closing a certificate  signed on its behalf by
its President,  Chief Executive  Officer,  or Chief Financial Officer certifying
that the conditions specified in Sections 5.1.1 and 5.1.2 have been fulfilled.

                           5.1.4 Registration;  Securities Exemptions. The offer
and sale of the  Purchased  Shares to the Investors  pursuant to this  Agreement
shall  be  exempt  from  the  registration  requirements  under  the Act and the
California  Corporate  Securities  Law  of  1968,  as  amended,  and  the  rules
thereunder (the "Law") and the registration and/or qualification requirements of
all other applicable state securities laws.

                           5.1.5 No  Material  Change.  There shall have been no
material adverse change in the Business from the date of this Agreement.

                           5.1.6 Opinion of Counsel.  The  Investors  shall have
received  an  opinion of counsel  to the  Company  substantially  in the form of
Exhibit A attached hereto.

         6.  CONDITIONS TO THE COMPANY'S OBLIGATIONS AT CLOSING.

                  6.1.  Closing.  The  obligations  of the  Company  under  this
Agreement  to sell the  Purchased  Shares to the  Investors  at the  Closing are
subject to the  fulfillment  or waiver on or before  the  Closing of each of the
following conditions by the Investor, and each Investor shall use all reasonable
efforts to cause such conditions to be satisfied on or before the Closing:

                           6.1.1    Representations    and    Warranties.    The
representations  and warranties of the Investor  contained in Section 4 shall be
true and  correct on and as of the  Closing  with the same effect as though such
representations and warranties had been made on and as of the Closing.

                                       8
<PAGE>

                           6.1.2 Payment of Purchase  Price.  The Investor shall
have  delivered  to the  Company the  purchase  price for the  Purchased  Shares
specified for such  Investor on the Schedule of Investors  attached  hereto,  in
accordance with the provisions of Section 2.

                           6.1.3 Registration;  Securities Exemptions. The offer
and sale of the  Purchased  Shares to the  Investor  pursuant to this  Agreement
shall be exempt from the  registration  requirements  under the Act and shall be
exempt  from  the  qualification  requirements  of the Law and the  registration
and/or qualification requirements of all other applicable state securities laws.

         7. REGISTRATION RIGHTS.

                  7.1  Definitions.  For purposes of this Agreement:

                           (a) Form S-3.  The term  "Form  S-3"  means such form
under the Act as is in effect on the date hereof or any  successor  registration
form under the Act subsequently adopted by the Commission that permits inclusion
or  incorporation  of substantial  information  by reference to other  documents
filed by the Company with the Commission.

                           (b) Holder.  The term "Holders" shall mean holders of
Registrable Securities that have registration rights pursuant to this Agreement.

                           (c) Registration. The terms "register," "registered,"
and  "registration"  refer to a registration  effected by preparing and filing a
registration  statement  in  compliance  with the Act,  and the  declaration  or
ordering of effectiveness of such registration statement.

                           (d)  Registrable  Securities.  The term  "Registrable
Securities" means: (1) all of the Purchased Shares, and (2) any shares of Common
Stock of the Company issued as a dividend or other distribution with respect to,
or in exchange for or in replacement of, any of the Purchased Shares;  provided,
however, that the term "Registrable Securities" shall exclude in all events (and
such  securities  shall  not  constitute   "Registrable   Securities")  (i)  any
Registrable Securities sold or transferred by a person in a transaction in which
the  registration  rights  granted  under this  Agreement  are not  assigned  in
accordance  with  the  provisions  of  this  Agreement,   (ii)  any  Registrable
Securities sold in a public offering pursuant to a registration  statement filed
with the  Commission  or sold  pursuant  to Rule 144  promulgated  under the Act
("Rule 144") or (iii) as to any Holder, the Registrable  Securities held by such
Holder if all of such Registrable Securities can be publicly sold without volume
restriction within a three-month period pursuant to Rule 144.

                           (e) Prospectus:  The term "Prospectus" shall mean the
prospectus  included in any Shelf  Registration  Statement  (including,  without
limitation,  a prospectus that discloses  information  previously omitted from a
prospectus filed as part of an effective registration statement in reliance upon
Rule  430A  promulgated  under the  Act),  as  amended  or  supplemented  by any
prospectus supplement (including,  without limitation, any prospectus supplement
with  respect to the terms of the  offering  of any  portion of the  Registrable
Securities  covered  by  such  Shelf  Registration  Statement),  and  all  other
amendments  and   supplements  to  the


                                       9
<PAGE>

Prospectus,  including post-effective  amendments, and all material incorporated
by reference or deemed to be incorporated by reference in such Prospectus.

                           (f) Shelf Registration Statement. See Section 7.2(a).

                  7.2  Form S-3 Shelf Registration.

                           (a) Registration.  The Company shall prepare and file
with the Commission  within 60 days following the Closing and use all reasonable
efforts  to  have  declared  effective  as  soon as  practicable  thereafter,  a
registration  statement on Form S-3 (or, if the Company is not then  eligible to
use Form S-3,  then another  appropriate  form)  providing for the resale by the
Holders  of  all  of  the  Registrable   Securities  (the  "Shelf   Registration
Statement").  The Shelf Registration Statement may include securities other than
those held by  Holders.  If the Shelf  Registration  Statement  is not  declared
effective by January 31, 2001 and does not remain  effective  for 45  continuous
days after its effective date (except for the duration of any Blackout Notice as
described in Section  7.2(b)  below),  then the  Investors  holding  Registrable
Securities shall be entitled to receive from the Company (pro rata in accordance
with their ownership of Registrable Securities) an aggregate number of shares of
Common Stock equal to 1% of the number of Purchased  Shares for each month after
January  31,  2001,  that  the  Shelf  Registration  Statement  is not  declared
effective (or does not remain effective), up to a maximum aggregate amount of 5%
of the  Purchased  Shares.  The Company  shall use its best  efforts to keep the
Shelf Registration Statement continuously effective (subject to Section 7.2(b)),
pursuant to the Act and the Rules and Regulations promulgated thereunder,  until
(i) the date when such  Registrable  Securities  cease to meet the definition of
Registrable   Securities   pursuant  to  Section  7.1,  or  (ii)  the  Company's
obligations  hereunder  terminate.  In the  event  that the  Shelf  Registration
Statement  shall cease to be effective,  the Company shall promptly  prepare and
file a new registration  statement covering the Registrable Securities and shall
use its best efforts to have such registration  statement  declared effective as
soon as possible.  Any such registration  statement shall be considered a "Shelf
Registration Statement" hereunder.

                           (b)  Blackout  Notice.  In the  event  (i)  that  the
Company  concludes  that it is  necessary  for the  Company  to  supplement  the
Prospectus or make an  appropriate  filing under the Exchange Act so as to cause
the  Prospectus  to  become  current,  or  (ii)  that,  in the  judgment  of the
President,  Chief Executive  Officer or the Company's Board of Directors,  it is
advisable to suspend use of the Prospectus for a discrete  period of time due to
undisclosed  pending  corporate  developments or pending public filings with the
Commission (which need not be described in detail),  the Company shall deliver a
written  notice  (the  "Blackout  Notice")  to the  Holder to the  effect of the
foregoing and, upon delivery of the Blackout  Notice,  the Holder shall not sell
any Purchased Shares or any other securities of the Company that are held by the
Holder,  shall not otherwise engage in any other Disposition with respect to the
Company's  securities,  and shall not  disclose  to any third  party that such a
notice has been given or the contents of the notice.  The Permitted Window shall
resume  upon the  Holder's  receipt  of copies of the  supplemented  or  amended
Prospectus,  or at such time as the Holder is advised in writing by the  Company
that the  Prospectus  may be used,  and at such time as the Holder has  received
copies of any additional or supplemental filings that are incorporated or deemed
incorporated  by  reference  in such  Prospectus  and which are  required  to be
delivered  as part of the  Prospectus.  In any event,  such  restrictions  shall
terminate  no later  than 45 days  after the date of  delivery  of the  Blackout
Notice.

                                       10
<PAGE>

If the Company has  delivered a Blackout  Notice within 90 days of the date that
it delivers another Blackout Notice pursuant this section,  then the 45-day time
period  set  forth in the  preceding  sentence  shall be  shortened  so that the
restrictions  imposed by the Blackout  Notice shall expire no later than 10 days
after delivery of such Blackout Notice.

                           (c)  Expenses.  The  registration  fees and  expenses
incurred by the Company in connection with the Shelf Registration  Statement and
actions taken by the Company in connection  with each Permitted  Window shall be
borne by the Company.  Holder shall be responsible  for any fees and expenses of
its counsel or other advisers.

                  7.3  Obligations of the Company.  Whenever  required to effect
the registration of any Registrable Securities under this Agreement, the Company
shall, as expeditiously as reasonably possible:

                           (a)  Furnish to the Holder such number of copies of a
Prospectus,   including  a  preliminary  Prospectus,   in  conformity  with  the
requirements of the Act, and such other  documents as it may reasonably  request
in order to facilitate the disposition of the Registrable Securities owned by it
that are included in such registration.

                           (b)  Use  all  reasonable  efforts  to  register  and
qualify the securities  covered by such registration  statement under such other
securities  or Blue  Sky  laws of such  jurisdictions  as  shall  be  reasonably
requested  by the Holder,  provided  that the  Company  shall not be required in
connection  therewith or as a condition  thereto to qualify to do business or to
file  a  general   consent  to  service  of  process  in  any  such   states  or
jurisdictions.

                           (c) Notify the Holder  promptly (i) of any request by
the Commission or any other federal or state  governmental  authority during the
period  of  effectiveness   of  a  registration   statement  for  amendments  or
supplements  to  such  registration  statement  or  related  prospectus  or  for
additional  information,  (ii) of the  issuance by the  Commission  or any other
federal  or state  governmental  authority  of any  stop  order  suspending  the
effectiveness  of a registration  statement or the initiation of any proceedings
for that  purpose and (iii) of the  receipt by the  Company of any  notification
with  respect  to  the  suspension  of  the   qualification  or  exemption  from
qualification of any of the Registrable  Securities for sale in any jurisdiction
or the initiation or threatening of any proceeding for such purpose.

                           (d)  Make  every  reasonable  effort  to  obtain  the
withdrawal of any order suspending the  effectiveness of the Shelf  Registration
Statement at the earliest possible time.

                  7.4 Furnish Information.  It shall be a condition precedent to
the  obligations of the Company to take any action  pursuant to Section 7.2 that
the Holder  shall  furnish to the Company  such  information  regarding  it, the
Registrable  Securities  held by it, and the intended  method of  disposition of
such  securities as shall be required to timely effect the  registration  of its
Registrable Securities.

                  7.5 Indemnification.  In the event any Registrable  Securities
are included in a registration statement under this Agreement:

                                       11
<PAGE>

                           (a) By the Company.  To the extent  permitted by law,
the Company  will  indemnify  and hold  harmless  the Holder,  the  officers and
directors of the Holder and each  person,  if any, who controls the Holder (such
persons and entities referred to as "Holder Indemnified  Parties"),  against any
losses, expenses,  damages or liabilities to which they may become subject under
the Act, the Exchange Act or other  federal or state law (a "Loss"),  insofar as
such Losses (or actions in respect  thereof)  arise out of any claim,  action or
proceeding  brought  by a third  party  arising  out of or based upon any of the
following statements, omissions or violations (collectively a "Violation"):

                           (i) any untrue  statement or alleged untrue statement
                  of a material fact contained in a registration statement filed
                  pursuant to this Section 7;

                           (ii) the  omission or alleged  omission to state in a
                  registration  statement  filed  pursuant  to this  Section 7 a
                  material fact required to be stated  therein,  or necessary to
                  make the statements therein not misleading; or

                           (iii)  any  violation  or  alleged  violation  by the
                  Company of the Act,  the  Exchange  Act,  any federal or state
                  securities law or any rule or regulation promulgated under the
                  Act, the Exchange Act or any federal or state  securities law,
                  in each case in connection  with the offering  covered by such
                  registration statement;

and the Company will  reimburse each Holder  Indemnified  Party for any legal or
other  expenses  reasonably  incurred by them, as incurred,  in connection  with
investigating  or defending  any such  Violation;  provided,  however,  that the
indemnity agreement contained in this subsection shall not apply to amounts paid
in  settlement  of any such Loss,  if such  settlement  is effected  without the
consent of the Company, nor shall the Company be liable in any such case for any
such Loss to the extent that it arises out of or is based upon a Violation which
occurs in reliance upon and in  conformity  with written  information  furnished
expressly for use in connection with such  registration  statement by the Holder
Indemnified Party; and provided further, that the Company will not be liable for
the  reasonable  legal fees and  expenses of more than one counsel to the Holder
Indemnified Parties.

                           (b) By the Holder.  To the extent  permitted  by law,
each Holder will indemnify and hold harmless the Company, each of its directors,
each of its  officers  who have  signed  the  registration  statement,  and each
person,  if any, who  controls  the Company  within the meaning of the Act (such
persons and entities referred to as "Company  Indemnified  Parties") against any
Losses to which such Company  Indemnified  Parties may become  subject under the
Act, the Exchange Act or other federal or state law,  insofar as such Losses (or
actions in respect  thereto)  arise out of or are based upon any  Violation,  in
each case to the extent (and only to the extent) that such  Violation  occurs in
reliance upon and in conformity with written information furnished by the Holder
expressly for use in connection with such registration statement; and the Holder
will reimburse any legal or other expenses  reasonably  incurred by such Company
Indemnified  Parties in  connection  with  investigating  or defending  any such
Violation;  provided,  however,  that the indemnity  agreement contained in this
subsection  shall not apply to amounts  paid in  settlement  of any such Loss if
such settlement is effected without the consent of the


                                       12
<PAGE>

Holder; provided further, that the Holder shall not be liable for the reasonable
legal fees and  expenses  of more than one  counsel to the  Company  Indemnified
Parties;  and provided  further,  that the total amounts payable in indemnity by
the Holder under this  subsection in respect of any  Violation  shall not exceed
the net proceeds received by the Holder in the registered  offering out of which
such Violation arises.

                           (c) Notice.  Promptly after receipt by an indemnified
party under this Section of notice of the commencement of any action  (including
any  governmental   action),  such  indemnified  party  will,  if  a  claim  for
indemnification  in respect thereof is to be made against any indemnifying party
under this Section,  deliver to the  indemnifying  party a written notice of the
commencement of such an action and the  indemnifying  party shall have the right
to participate in, and, to the extent the indemnifying party so desires, jointly
with any other  indemnifying  party  similarly  noticed,  to assume the  defense
thereof  with  counsel  selected  by  the  indemnifying   party  and  reasonably
acceptable  to a majority  in  interest of the  indemnified  parties;  provided,
however,  that an  indemnified  party  shall  have the right to  retain  its own
counsel,  with the reasonable  fees and expenses to be paid by the  indemnifying
party,  if the  indemnified  party has been  advised in writing by counsel  that
representation  of  such  indemnified  party  by  the  counsel  retained  by the
indemnifying  party would be  inappropriate  due to actual conflict of interests
between such indemnified  party and any other party  represented by such counsel
in such  proceeding.  The failure to deliver written notice to the  indemnifying
party  within a  reasonable  time of the  commencement  of any such action shall
relieve such indemnifying party of liability to the indemnified party under this
Section to the extent such delay caused  material  prejudice to the  indemnified
party, but the omission so to deliver written notice to the  indemnifying  party
will not relieve it of any liability that it may have to any  indemnified  party
otherwise than under this Section.

                           (d)  Defect  Eliminated  in  Final  Prospectus.   The
foregoing indemnity  agreements of the Company and the Holder are subject to the
condition  that,  insofar as they relate to any Violation  made in a preliminary
prospectus but eliminated or remedied in the amended prospectus on file with the
Commission at the time the registration  statement in question becomes effective
or in the amended  prospectus filed with the Commission  pursuant to Rule 424(b)
of the Commission (the "Final Prospectus"),  such indemnity agreements shall not
inure  to the  benefit  of any  person  if a copy of the  Final  Prospectus  was
furnished in a timely manner to the  indemnified  party and was not furnished to
the person  asserting  the loss,  liability,  claim or damage at or prior to the
time such action is required by the Act.

                           (d) Survival.  The obligations of the Company and the
Holder  under this  Section  shall  survive the  completion  of any  offering of
Registrable Securities in a registration statement, and otherwise.

                  7.6 Rule 144  Reporting.  With a view to making  available the
benefits of certain rules and  regulations of the  Commission,  which may at any
time  permit  the  sale of the  Registrable  Securities  to the  public  without
registration,  for so long as the Holder owns any  Registrable  Securities,  the
Company agrees to:

                           (a)   Make   and  keep   adequate,   current   public
information  available,  as those terms are  understood  and defined in Rule 144
under the Act, at all times;

                                       13
<PAGE>

                           (b) File with the  Commission  in a timely manner all
reports and other documents required of the Company under the Exchange Act; and

                           (c)  So  long  as the  Holder  owns  any  Registrable
Securities,  to furnish to the Holder forthwith upon request a written statement
by the Company as to its compliance with the reporting requirements of said Rule
144, a copy of the most recent  annual or quarterly  report of the Company,  and
such other  reports and  documents  of the Company as the Holder may  reasonably
request in availing itself of any rule or regulation of the Commission  allowing
a Holder to sell any such securities without registration.

                  7.7  Termination of Cellegy's  Obligations.  The Company shall
have no obligation to register, or maintain, a registration  statement governing
Registrable  Securities,  (i) if all Registrable Securities have been registered
and sold pursuant to registrations effected pursuant to this Agreement,  or (ii)
with  respect  to any  particular  Holder,  at  such  time  as  all  Registrable
Securities  held by such  Holder may be sold  without  any  volume  restrictions
within a three month  period  under Rule 144, as it may be amended  from time to
time,  including but not limited to  amendments  that reduce that period of time
that securities must be held before such securities may be sold pursuant to such
rule.

                  7.8  Piggyback  Registrations.  (a) The Company  shall use its
best efforts to notify all Holders of Registrable Securities in writing at least
twenty  (20) days before  filing any  registration  statement  under the Act for
purposes  of  effecting  an  underwritten  public  offering  by the  Company  of
securities of the Company  (excluding  registration  statements  relating to any
employee benefit plan or a corporate merger,  acquisition or reorganization,  or
any  Form  S-3  or  similar  shelf  registration   statements  relating  to  the
non-underwritten  offer and sale of  securities  for the  account  of persons or
entities other than the Company) and will afford each such Holder an opportunity
to include in such  registration  statement  all or any part of the  Registrable
Securities then held by such Holder. Each Holder desiring to include in any such
registration  statement all or any part of the  Registrable  Securities  held by
such Holder  shall,  within ten (10) days after  receipt of the  above-described
notice from the  Company,  so notify the Company in writing,  and in such notice
shall  inform the Company of the number of  Registrable  Securities  such Holder
wishes to include in such  registration  statement.  If a Holder  decides not to
include all of its  Registrable  Securities in any such  registration  statement
filed by the Company,  such Holder shall nevertheless continue to have the right
to include any Registrable  Securities in any subsequent  registration statement
or  registration  statements  as may be filed by the  Company  with  respect  to
offerings of its securities, all upon the terms and conditions set forth herein.
The Holders' rights to include any Registrable  Securities in any offering under
this  Section  are  subject  in all  events  to  the  ability  of  the  managing
underwriter  for  such  offering  to  exclude  some  or all  of the  Registrable
Securities requested to be registered on the basis of a good faith determination
that  inclusion of such  securities  might  adversely  affect the success of the
offering or otherwise adversely affect the Company.  Any such exclusion shall be
pro rata among all Holders who have requested to sell Registrable  Securities in
such registration.

                           (b) Underwriting.  If a registration  statement under
which the  Company  gives  notice  under  this  Section  is for an  underwritten
offering,   then  the  Company  shall  so  advise  the  Holders  of  Registrable
Securities. In such event, the right of any such Holder's Registrable Securities
to be included in a  registration  pursuant to this Section shall be


                                       14
<PAGE>

conditioned  upon  such  Holder's  participation  in such  underwriting  and the
inclusion of such Holder's  Registrable  Securities in the  underwriting  to the
extent provided herein.  All Holders  proposing to distribute their  Registrable
Securities through such underwriting shall enter into an underwriting  agreement
in customary  form with the managing  underwriter or  underwriters  selected for
such  underwriting  and shall  furnish  such  information  and  documents as the
Company or the managing  underwriter or  underwriters  may  reasonably  request.
Notwithstanding  any  other  provision  of  this  Agreement,   if  the  managing
underwriter  determine(s)  in  good  faith  that  marketing  factors  require  a
limitation  of the  number  of  shares  to be  underwritten,  then the  managing
underwriter(s) may exclude Registrable  Securities from the registration and the
underwriting,  pro rata among all Holders who have requested to sell Registrable
Securities in such  registration.  If any Holder disapproves of the terms of any
such underwriting, such Holder may elect to withdraw therefrom by written notice
to the Company and the  underwriter,  delivered at least ten (10)  business days
prior to the  effective  date of the  registration  statement.  Any  Registrable
Securities  excluded or withdrawn from such  underwriting  shall be excluded and
withdrawn from the registration.

                           (c) Expenses.  The Holders shall be  responsible  for
there  pro  rata  share of  registration  fees and  underwriters'  and  brokers'
discounts and  commissions  relating to any Registrable  Securities  included in
such  registration.  Other  registration  expenses (such as legal and accounting
fees of counsel to the Company, printing fees, road show expenses, and the like)
shall be shall be borne by the Company.

                           (d) Number of Piggyback Registrations.  The piggyback
registration rights granted to the Holders under this Section shall apply to the
first three registrations filed by the Company after the Closing.

         8.  ASSIGNMENT.  Notwithstanding  anything herein to the contrary,  the
registration rights of the Holder under Section 7 hereof may be assigned only to
a party who  acquires  from the Holder at least  100,000  shares of  Registrable
Securities (as such number may be adjusted to reflect subdivisions, combinations
and stock dividends of the Company's  Common Stock),  (such party is referred to
as a "Assignee");  provided,  however,  that (w) no party may be assigned any of
the foregoing  rights until the Company is given written notice by the assigning
party at the  time of such  assignment  stating  the  name  and  address  of the
Assignee and identifying the securities of the Company as to which the rights in
question  are being  assigned;  (x) that any such  Assignee  shall  receive such
assigned rights subject to all the terms and conditions of this  Agreement;  and
(y) no such  assignment or  assignments  shall  increase the  obligations of the
Company hereunder.

         9.  MISCELLANEOUS.

                  9.1 Survival of Warranties.  The  representations,  warranties
and covenants of the Company and the Investors  contained in or made pursuant to
this  Agreement  shall survive the execution and delivery of this  Agreement and
the Closing and shall in no way be affected by any  investigation of the subject
matter  thereof  made by or on behalf of the  Investors,  their  counsel  or the
Company, as the case may be.

                  9.2 Successors  and Assigns.  The terms and conditions of this
Agreement  shall  inure to the  benefit  of and be binding  upon the  respective
successors and assigns of the parties.

                                       15
<PAGE>

                  9.3 Governing  Law;  Consent to  Jurisdiction.  This Agreement
shall be  governed  by and  construed  under the  internal  laws of the State of
California as applied to agreements among California  residents entered into and
to be performed entirely within  California,  without reference to principles of
conflict of laws or choice of laws.

                  9.4  Counterparts.  This  Agreement  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.

                  9.5 Headings. The headings and captions used in this Agreement
are used for  convenience  only and are not to be  considered  in  construing or
interpreting  this  Agreement.  All  references  in this  Agreement to sections,
paragraphs,  exhibits, and schedules shall, unless otherwise provided,  refer to
sections and paragraphs hereof and exhibits and schedules  attached hereto,  all
of which exhibits and schedules are incorporated herein by this reference.

                  9.6 Notices. Unless otherwise provided, any notice required or
permitted  under this  Agreement  shall be given in writing  and shall be deemed
effectively  given  upon  personal  delivery  to the  party to be  notified,  by
telecopier or upon deposit with the United States Post Office,  by registered or
certified mail, postage prepaid and addressed to the party to be notified in the
case of the Company,  at 349 Oyster Point  Boulevard,  South San  Francisco,  CA
94080, attention:  President, with a copy to C. Kevin Kelso, Fenwick & West LLP,
Two Palo Alto Square,  Palo Alto,  California 94306, or in the case of Investor,
at the  record  address  for such  Investor  as  reflected  on the  books of the
Company,  or at such other address as any party may designate by giving ten (10)
days  advance  written  notice  to the  other  party.  Notices  shall be  deemed
delivered  upon  delivery  if  personally  delivered,  one  business  day  after
transmission with  confirmation of receipt if sent by telecopier,  or three days
after deposit in the mails if mailed.

                  9.7 No Finder's Fees. Each party represents that it neither is
nor  will be  obligated  for any  finder's  or  broker's  fee or  commission  in
connection with this transaction.  Each Investor agrees to indemnify and to hold
harmless the Company from any liability for any  commission or  compensation  in
the nature of a finder's or broker's fee (and any asserted  liability) for which
the Investor or any of its officers, partners,  employees, or representatives is
responsible.  The Company agrees to indemnify and to hold harmless each Investor
from any  liability  for any  commission  or  compensation  in the  nature  of a
finder's or broker's fee (and any asserted  liability)  for which the Company or
any of its officers, employees or representatives is responsible.

                  9.8 Costs, Expenses. Each party's costs in connection with the
preparation,  execution  delivery and  performance of this Agreement  (including
without limitation legal fees) shall be borne by that party.

                  9.9 Amendments and Waivers.  Any term of this Agreement may be
amended and the  observance of any term of this  Agreement may be waived (either
generally   or  in  a   particular   instance   and  either   retroactively   or
prospectively),  only with the  written  consent of the  Company  and  Investors
holding a  majority  of the  Purchased  Shares  purchased  hereunder;  provided,
however,  that no amendment or waiver of the Company's obligations under Section
7 of this Agreement  that  significantly  and adversely  affects the rights of a
holder of Purchased  Shares shall be binding upon that holder unless that holder
has consented in writing to such


                                       16
<PAGE>

amendment  or waiver.  Subject  to the  limitations  set forth in the  preceding
sentence, any amendment or waiver effected in accordance with this Section shall
be binding  upon each  holder of any  Purchased  Shares at the time  outstanding
(even if such  Investor or other  holder did not vote with  respect to, or voted
against, such amendment or waiver),  each future holder of such securities,  and
the Company. The Investors acknowledge that by virtue of this provision, holders
of a majority of the  Purchased  Shares may bind other  holders to  amendment or
waivers that such other holders may have voted to oppose.

                  9.10 Severability. If one or more provisions of this Agreement
are held to be invalid,  illegal or  unenforceable  under  applicable  law, such
provision(s)  shall be  excluded  from this  Agreement  and the  balance  of the
Agreement  shall be  interpreted  as if such  provision(s)  were so excluded and
shall be enforceable in accordance with its terms.

                  9.11  Entire  Agreement.  This  Agreement,  together  with any
exhibits or schedules hereto, constitutes the entire agreement and understanding
of the parties with respect to the subject  matter hereof and supersedes any and
all prior negotiations,  correspondence,  agreements,  understandings  duties or
obligations between the parties with respect to the subject matter hereof.

                  9.12  Further  Assurances.  From  and  after  the date of this
Agreement,  upon the request of an Investor or the Company,  the Company and the
Investors  shall  execute  and  deliver  such  instruments,  documents  or other
writings as may be  reasonably  necessary  or desirable to confirm and carry out
and to effectuate fully the intent and purposes of this Agreement.

                [Remainder of this page intentionally left blank]


                                       17
<PAGE>


         IN WITNESS WHEREOF,  the parties hereto have executed this Common Stock
Purchase Agreement as of the date first above written.

THE COMPANY:                                      INVESTOR:
-----------                                       --------

Cellegy Pharmaceuticals, Inc.,                    Framlington Health Fund
  a California corporation                        ------------------------------
                                                  Name of Investor




By:  /s/ Richard Juelis                        By:  /s/ Antony Milford
     ------------------------------------           -------------------------


Title:  VP, Finance, CFO                       Title:  Trust Accounts Supervisor
        ---------------------------------              ----------------------






                           [COUNTERPART SIGNATURE PAGE
                        COMMON STOCK PURCHASE AGREEMENT]

                                       18
<PAGE>


         IN WITNESS WHEREOF,  the parties hereto have executed this Common Stock
Purchase Agreement as of the date first above written.

THE COMPANY:                                 INVESTOR:
-----------                                  --------

Cellegy Pharmaceuticals, Inc.,               Munder Framlington Healthcare Fund
  a California corporation                   ------------------------------
                                             Name of Investor




By:  /s/ A. Richard Juelis                   By:  /s/ Antony Milford
     ------------------------------------         -------------------------


Title:  VP, Finance, CFO                     Title:  Trust Accounts Supervisor
        ---------------------------------            ----------------------






                           [COUNTERPART SIGNATURE PAGE
                        COMMON STOCK PURCHASE AGREEMENT]

                                       19

<PAGE>


         IN WITNESS WHEREOF,  the parties hereto have executed this Common Stock
Purchase Agreement as of the date first above written.

THE COMPANY:                                      INVESTOR:
-----------                                       --------

Cellegy Pharmaceuticals, Inc.,                    SMALL CAP World Fund, Inc.
  a California corporation                        ------------------------------
                                                  Name of Investor




By:  /s/ A. Richard Juelis                     By:  /s/ Michael J. Downer
     ------------------------------------           -------------------------


Title:  VP, Finance, CFO                       Title:  Secretary
        ---------------------------------              ----------------------






                           [COUNTERPART SIGNATURE PAGE
                        COMMON STOCK PURCHASE AGREEMENT]

                                       20
<PAGE>


         IN WITNESS WHEREOF,  the parties hereto have executed this Common Stock
Purchase Agreement as of the date first above written.

THE COMPANY:                                      INVESTOR:
-----------                                       --------

Cellegy Pharmaceuticals, Inc.,                    Four Partners
  a California corporation                        ------------------------------
                                                  Name of Investor




By:  /s/ A. Richard Juelis                     By:  /s/ Thomas J. Tisch
     ------------------------------------           -------------------------


Title:  VP, Finance, CFO                       Title:  Manager, Four Partners
        ---------------------------------              ----------------------






                           [COUNTERPART SIGNATURE PAGE
                        COMMON STOCK PURCHASE AGREEMENT]

                                       21



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