SECURITIES PURCHASE AGREEMENT


         SECURITIES  PURCHASE AGREEMENT (the "Agreement"),  dated as of December
9,  1998,  by  and  among  Immunomedics,  Inc.,  a  Delaware  corporation,  with
headquarters  located at 300 American Road, Morris Plains, New Jersey 07950 (the
"Company"),  and the investors  listed on the Schedule of Buyers attached hereto
(individually, a "Buyer" and collectively, the "Buyers").

         WHEREAS:

         A. The  Company  and the  Buyers  are  executing  and  delivering  this
Agreement in reliance upon the exemption from securities  registration  afforded
by Rule 506 of Regulation D ("Regulation D") as promulgated by the United States
Securities and Exchange Commission (the "SEC") under the Securities Act of 1933,
as amended (the "1933 Act");

         B. The Company has authorized the following new series of its Preferred
Stock, par value $.01 per share (the "Preferred Stock"):  the Company's Series F
Convertible Preferred Stock (the "Preferred Shares"), which shall be convertible
into shares of the Company's Common Stock, par value $.01 per share (the "Common
Stock") (as converted, the "Conversion Shares"), in accordance with the terms of
the  Company's  Certificate  of  Designations,  Preferences  and  Rights  of the
Preferred  Shares,  substantially  in the form attached hereto as Exhibit A (the
"Certificate of Designations");

         C. The Buyers wish to purchase, upon the terms and conditions stated in
this  Agreement,  initially an aggregate of 1,250 of the  Preferred  Shares (the
"Initial  Preferred  Shares") in the respective  amounts set forth opposite each
Buyer's name on the Schedule of Buyers;

         D. Subject to the terms and conditions set forth in this Agreement, the
Company may have the right to cause the Buyers to purchase up to an aggregate of
750 Preferred  Shares (pro rata based on the number of Initial  Preferred Shares
each Buyer  purchased  in  relation  to the total  number of  Initial  Preferred
Shares) (the "Put Preferred  Shares") (the Initial  Preferred Shares and the Put
Preferred  Shares  collectively  are  referred  to  in  this  Agreement  as  the
"Preferred Shares");

         E. Contemporaneously with the execution and delivery of this Agreement,
the parties hereto are executing and delivering a Registration  Rights Agreement
substantially in the form attached hereto as Exhibit B (the "Registration Rights
Agreement")  pursuant  to which  the  Company  has  agreed  to  provide  certain



registration rights under the 1933 Act and the rules and regulations promulgated
thereunder, and applicable state securities laws.

         NOW THEREFORE, the Company and the Buyers hereby agree as follows:

         1.       PURCHASE AND SALE OF PREFERRED SHARES.

                  a. Purchase of Preferred  Shares.  Subject to satisfaction (or
waiver) of the conditions set forth in Sections 6(a) and 7(a), the Company shall
issue and sell to the Buyers and the Buyers  severally  shall  purchase from the
Company an  aggregate  of 1,250  Initial  Preferred  Shares,  in the  respective
amounts set forth  opposite  each  Buyer's  name on the  Schedule of Buyers (the
"Initial  Closing").  Subject to satisfaction  (or waiver) of the conditions set
forth in Sections 1(c),  1(d),  6(b) and 7(b), the Company may require that each
Buyer  purchase  that number of Put  Preferred  Shares equal to such Buyer's pro
rata portion of up to an aggregate of 750 Preferred  Shares (based on the number
of Initial Preferred Shares each Buyer purchased in relation to the total number
of Initial  Preferred Shares purchased by the Buyers) (the "Put Closing").  (The
Initial  Closing  and the  Put  Closing  collectively  are  referred  to in this
Agreement as the "Closings").  The purchase price (the "Purchase Price") of each
Preferred Share at each of the Closings shall be $10,000.

                  b. The Initial  Closing Date. The date and time of the Initial
Closing (the "Initial  Closing Date") shall be 10:00 a.m.  Central Time,  within
three (3) business days following the date hereof,  subject to satisfaction  (or
waiver) of the conditions to the Initial  Closing set forth in Sections 6(a) and
7(a) (or  such  later  date as is  mutually  agreed  to by the  Company  and the
Buyers).  The Initial  Closing  shall occur on the Initial  Closing  Date at the
offices of Katten Muchin & Zavis, 525 West Monroe Street,  Suite 1600,  Chicago,
Illinois 60661-3693.

                  c. The Put Closing Date.  The date and time of the Put Closing
(the "Put Closing Date") shall be 10:00 a.m. Central Time, on the fifth business
day after each of the Buyers have received  written notice from the Company that
the  Registration  Statement (as defined in the Registration  Rights  Agreement)
covering  200% of the  Conversion  Shares  issuable  upon  conversion of the Put
Preferred Shares (without regard to any limitations on conversions) to be issued
at such  Put  Closing  has  been  declared  effective  by the  SEC,  subject  to
satisfaction  (or  waiver) of the  conditions  to the Put  Closing  set forth in
Sections  6(b) and 7(b) and the  conditions  set forth in Section  1(d) (or such
later date as is mutually  agreed to by the Company and the Buyers).  During the
period  beginning  on December 1, 1999 and ending on February 28, 2000 (the "Put
Notice  Period") but subject to the  requirements  of Sections 6(b) and 7(b) and
satisfaction  of the Put Notice  Conditions  (as defined in Section  1(d)),  the
Company may require each Buyer to purchase Put  Preferred  Shares by  delivering
written  notice to each of the Buyers (a "Put Share  Notice") on any date during
the Put Notice Period (the "Put Share Notice Date").  The Put Share Notice shall
set forth (i) each  Buyer's  pro rata  portion  (based on the  number of Initial

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Preferred Shares each Buyer purchased in relation to the total number of Initial
Preferred  Shares  purchased by all the Buyers) of the  aggregate  number of Put
Preferred  Shares (which  aggregate number shall not exceed 750 Preferred Shares
which the Company is requiring each Buyer to purchase at such Put Closing,  (ii)
the  aggregate  Purchase  Price for each such Buyer's Put  Preferred  Shares and
(iii) the Company's  calculation of the Initial Fixed Price, as of the Put Share
Notice Date, of the Put Preferred Shares. The Put Closing shall occur on the Put
Closing Date at the offices of Katten  Muchin & Zavis,  525 West Monroe  Street,
Suite 1600, Chicago, Illinois 60661-3693.  (The Initial Closing Date and the Put
Closing  Date  collectively  are  referred to in this  Agreement as the "Closing
Dates").

                  d. The Put Notice Conditions. Notwithstanding anything in this
agreement to the  contrary,  the Company  shall not be entitled to deliver a Put
Share Notice and require the Buyers to purchase the Put Preferred Shares unless,
in addition to the  satisfaction of the  requirements of Sections 1(c), 6(b) and
7(b),  all of  the  following  conditions  (the  "Put  Notice  Conditions")  are
satisfied:  (i) during the period beginning on the earlier of (A) the date which
is 60 days prior to the Put Share  Notice  Date and (B) 90 days prior to the Put
Closing Date and ending on and including the Put Closing Date, the  registration
statement  covering  the  resale  of the  Conversion  Shares  has been  declared
effective by the SEC and at all times has been  effective  and available for the
sale of no less than 125% of the sum of (A) the number of Conversion Shares then
issuable upon the conversion of all  outstanding  Preferred  Shares (as adjusted
for stock splits,  stock  dividends,  reorganization  and  combinations or other
similar  events) and (B) the number of  Conversion  Shares that are then held by
the Buyers;  (ii) during the period  beginning  on the Initial  Closing Date and
ending on and including the Put Closing Date,  the Common Stock is listed on The
Nasdaq  National Market and The New York Stock Exchange (the "NYSE") and has not
been  suspended  from  trading at any time  during  such  period  (except  for a
voluntary suspension of not more than one day due to a business  announcement by
the Company),  has not been voluntarily delisted at any time during such period,
nor is there any pending or threatened  delisting or suspension;  (iii) no event
constituting a Major  Transaction (as defined in Section 3(c) of the Certificate
of Designations), including an agreement to consummate a Major Transaction, or a
Triggering Event (as defined in Section 3(d) of the Certificate of Designations)
shall have occurred nor shall any pending  event which would  constitute a Major
Transaction  have been  publicly  disclosed  from the  period  beginning  on and
including the Initial  Issuance Date and ending on and including the Put Closing
Date;  (iv) on each day during the period  beginning on and  including  the date
which is 60 days prior to the Put Share Notice Date and ending on and  including
the Put Share Notice Date, the Closing Bid Price (as defined in the  Certificate
of  Designations) of the Common Stock shall not be less than 125% of the Trigger
Price (as defined in the Certificate of Designations)  of the Initial  Preferred
Shares;(v) the Company shall have obtained shareholder approval for the issuance
of greater than 20% of its outstanding  shares of Common Stock;  (vi) during the
period beginning on the Initial Closing Date and ending on and including the Put
Closing Date, the Company shall have delivered Conversion Shares upon conversion
of the Preferred  Shares to the Buyers on a timely basis as set forth in Section
2(f)(ii)  of the  Certificate  of  Designations;  provided,  however,  that  for
purposes  of this  Section  1(d)  only,  the  Company  shall be  deemed  to have
satisfied  the  condition  set forth in this clause (vi) if on not more than two
occasions the Company failed to meet the requirements of Section 2(f)(ii) of the

                                      -3-


Certificate of  Designation by no more than three days;  (vii) the Company shall
not have  previously  completed  a Put  Closing;  and  (viii)  the number of Put
Preferred  Shares to be sold by the Company at such Put Closing is not less than
100 Preferred Shares.

                  e. Form of  Payment.  On each of the Closing  Dates,  (i) each
Buyer shall pay the Purchase Price to the Company for the Preferred Shares to be
issued and sold to such Buyer at the  respective  Closing,  by wire  transfer of
immediately  available  funds in  accordance  with the  Company's  written  wire
instructions,   and  (ii)  the  Company  shall  deliver  to  each  Buyer,  stock
certificates  (in the  denominations  as such Buyer shall  request)  (the "Stock
Certificates") representing such number of the Preferred Shares which such Buyer
is then  purchasing (as indicated  opposite such Buyer's name on the Schedule of
Buyers),  duly  executed on behalf of the Company and  registered in the name of
such Buyer or its designee.


         2.       BUYER'S REPRESENTATIONS AND WARRANTIES.

                  Each Buyer represents and warrants with respect to only itself
that:

                  a.  Investment  Purpose.  Such  Buyer  (i)  is  acquiring  the
Preferred Shares and (ii) upon conversion of the Preferred Shares,  will acquire
the  Conversion  Shares then issuable (the  Preferred  Shares and the Conversion
Shares,  collectively are referred to herein as the  "Securities"),  for its own
account  for  investment  only and not with a view  towards,  or for  resale  in
connection  with, the public sale or  distribution  thereof,  except pursuant to
sales  registered or exempted  under the 1933 Act;  provided,  however,  that by
making the representations  herein, such Buyer does not agree to hold any of the
Securities  for any minimum or other  specific  term and  reserves  the right to
dispose  of the  Securities  at any time in  accordance  with or  pursuant  to a
registration statement or an exemption under the 1933 Act.

                  b. Accredited  Investor  Status.  Such Buyer is an "accredited
investor" as that term is defined in Rule 501(a) of Regulation D.

                  c. Reliance on  Exemptions.  Such Buyer  understands  that the
Securities  are being offered and sold to it in reliance on specific  exemptions
from the registration requirements of United States federal and state securities
laws and that the Company is relying in part upon the truth and accuracy of, and
such Buyer's  compliance  with,  the  representations,  warranties,  agreements,
acknowledgments  and  understandings  of such Buyer set forth herein in order to
determine the  availability of such exemptions and the eligibility of such Buyer
to acquire such Securities.


                                      -4-


                  d. Information. Such Buyer and its advisors, if any, have been
furnished with all materials  relating to the business,  finances and operations
of the Company and  materials  relating to the offer and sale of the  Securities
which have been  requested by such Buyer.  Such Buyer and its advisors,  if any,
have been afforded the opportunity to ask questions of the Company. Neither such
inquiries nor any other due diligence  investigations conducted by such Buyer or
its advisors,  if any, or its representatives shall modify, amend or affect such
Buyer's right to rely on the Company's  representations and warranties contained
in Sections 3 and 9(m) below.  Such Buyer understands that its investment in the
Securities  involves  a  high  degree  of  risk.  Such  Buyer  has  sought  such
accounting,  legal and tax  advice  as it has  considered  necessary  to make an
informed investment decision with respect to its acquisition of the Securities.

                  e. No  Governmental  Review.  Such Buyer  understands  that no
United States  federal or state agency or any other  government or  governmental
agency has passed on or made any recommendation or endorsement of the Securities
or the fairness or suitability of the investment in the Securities nor have such
authorities  passed  upon  or  endorsed  the  merits  of  the  offering  of  the
Securities.

                  f. Transfer or Resale.  Such Buyer  understands that except as
provided in the Registration Rights Agreement:  (i) the Securities have not been
and are not being  registered  under the 1933 Act or any state  securities laws,
and may not be  offered  for sale,  sold,  assigned  or  transferred  unless (A)
subsequently  registered thereunder,  (B) such Buyer shall have delivered to the
Company an opinion of counsel,  in a generally  acceptable  form,  to the effect
that such Securities to be sold,  assigned or transferred may be sold,  assigned
or  transferred  pursuant to an exemption  from such  registration,  or (C) such
Buyer provides the Company with reasonable assurance that such Securities can be
sold,  assigned or transferred  pursuant to Rule 144 promulgated  under the 1933
Act (or a successor rule thereto) ("Rule 144");  (ii) any sale of the Securities
made in  reliance on Rule 144 may be made only in  accordance  with the terms of
Rule  144  and  further,  if  Rule  144 is not  applicable,  any  resale  of the
Securities  under  circumstances in which the seller (or the person through whom
the sale is made) may be deemed to be an underwriter (as that term is defined in
the 1933 Act) may require  compliance  with some other  exemption under the 1933
Act or the rules and  regulations of the SEC  thereunder;  and (iii) neither the
Company nor any other person is under any obligation to register such Securities
under the 1933 Act or any state  securities laws or to comply with the terms and
conditions of any exemption thereunder.

                  g. Legends.  Such Buyer  understands  that the certificates or
other instruments  representing the Preferred Shares and, until such time as the
sale of the  Conversion  Shares  have  been  registered  under  the  1933 Act as
contemplated  by the  Registration  Rights  Agreement,  the  stock  certificates
representing  the  Conversion  Shares,  except as set forth below,  shall bear a
restrictive  legend in  substantially  the following  form (and a  stop-transfer
order may be placed against transfer of such stock certificates):

                                      -5-



         THE SECURITIES REPRESENTED BY THIS CERTIFICATE HAVE NOT BEEN REGISTERED
         UNDER THE  SECURITIES  ACT OF 1933,  AS AMENDED,  OR  APPLICABLE  STATE
         SECURITIES  LAWS. THE SECURITIES  HAVE BEEN ACQUIRED FOR INVESTMENT AND
         MAY NOT BE OFFERED  FOR SALE,  SOLD,  TRANSFERRED  OR  ASSIGNED  IN THE
         ABSENCE OF AN EFFECTIVE REGISTRATION STATEMENT FOR THE SECURITIES UNDER
         THE SECURITIES ACT OF 1933, AS AMENDED,  OR APPLICABLE STATE SECURITIES
         LAWS, OR AN OPINION OF COUNSEL,  IN A GENERALLY  ACCEPTABLE  FORM, THAT
         REGISTRATION  IS  NOT  REQUIRED  UNDER  SAID  ACT OR  APPLICABLE  STATE
         SECURITIES  LAWS OR UNLESS  SOLD  PURSUANT  TO RULE 144 UNDER SAID ACT.
         NOTWITHSTANDING  THE  FOREGOING,  THE  SECURITIES  MAY  BE  PLEDGED  IN
         CONNECTION WITH A BONA FIDE MARGIN ACCOUNT.

The legend  set forth  above  shall be removed  and the  Company  shall  issue a
certificate without such legend to the holder of the Securities upon which it is
stamped, if (i) such Securities are registered for sale under the 1933 Act, (ii)
in connection with a sale transaction,  such holder provides the Company with an
opinion of counsel, in a generally  acceptable form, to the effect that a public
sale, assignment or transfer of such Securities may be made without registration
under the 1933 Act, or (iii) such holder  provides the Company  with  reasonable
assurances  that such  Securities  can be sold  pursuant to Rule 144 without any
restriction as to the number of securities acquired as of a particular date that
can then be immediately sold. Each Buyer  acknowledges,  covenants and agrees to
sell the Securities  represented by a  certificate(s)  from which the legend has
been removed, only pursuant to (i) a registration  statement effective under the
1933 Act, or (ii) advice of counsel  that such sale is exempt from  registration
required by Section 5 of the 1933 Act.

                  h.  Authorization;  Enforcement.  This Agreement has been duly
and validly authorized,  executed and delivered on behalf of such Buyer and is a
valid and binding  agreement  of such Buyer  enforceable  against  such Buyer in
accordance with its terms, subject as to enforceability to general principles of
equity and to applicable  bankruptcy,  insolvency,  reorganization,  moratorium,
liquidation  and other  similar laws  relating to, or affecting  generally,  the
enforcement  of applicable  creditors'  rights and remedies.  Such Buyer has the
requisite  corporate or other power and authority to enter into and perform this
Agreement and the Registration  Rights Agreement.  The execution and delivery of
this  Agreement  and the  Registration  Rights  Agreement  by such Buyer and the
consummation by such Buyer of the transactions  contemplated hereby and thereby,
including  without  limitation  the  payment  of the  Purchase  Price  for  each
Preferred  Share  purchased  has been duly  authorized  by such Buyer's board of
directors or other person or body having the power to authorize  such actions by
such Buyer.


                                      -6-



                  i.  Residency.  Such Buyer is a resident of that  jurisdiction
specified on the Schedule of Buyers.

                  j.  Organization.  Such Buyer is duly  organized  and  validly
existing  in good  standing  under the laws of the  jurisdiction  in which it is
organized.

                  k.  No Conflicts.  The execution, delivery and  performance by
such Buyer of this Agreement and the Registration  Rights Agreement does not (i)
result in a violation of such Buyer's organizational  documents or (ii) conflict
with, or constitute a default (or an event which with notice or lapse of time or
both would become a default) under, or give to others any rights of termination,
amendment,   acceleration  or  cancellation  of,  any  agreement,  indenture  or
instrument to which the Buyer is a party.


         3.       REPRESENTATIONS AND WARRANTIES OF THE COMPANY.

                  The  Company  represents  and  warrants  to each of the Buyers
that:

                  a.  Organization  and  Qualification.   The  Company  and  its
"Subsidiaries"  (which for purposes of this Agreement  means any entity in which
the Company,  directly or  indirectly,  owns capital stock or holds an equity or
similar  interest  other than dormant or inactive  entities which have no assets
and no  liabilities  and other than  investments  in  marketable  securities  (a
complete  list of which is set forth in  Schedule  3(a)) are  corporations  duly
organized  and  validly  existing  in  good  standing  under  the  laws  of  the
jurisdiction in which they are  incorporated,  and have the requisite  corporate
power and  authorization  to own their properties and to carry on their business
as now  being  conducted.  Except  as set forth on  Schedule  3(a),  each of the
Company and its  Subsidiaries  is duly qualified as a foreign  corporation to do
business and is in good standing in every jurisdiction in which its ownership of
property or the nature of the business  conducted by it makes such qualification
necessary,  except to the extent  that the failure to be so  qualified  or be in
good  standing  would  not  have a  Material  Adverse  Effect.  As  used in this
Agreement,  "Material  Adverse Effect" means any material  adverse effect on the
business,  properties,  assets,  operations,  results of  operations,  financial
condition or prospects of the Company and its  Subsidiaries,  if any, taken as a
whole,  or on the  transactions  contemplated  hereby or by the  agreements  and
instruments  to be entered into in connection  herewith,  or on the authority or
ability  of the  Company  to  perform  its  obligations  under  the  Transaction
Documents (as defined below) or the Certificate of Designations.

                  b.   Authorization;   Enforcement;   Compliance   with   Other
Instruments.  (i) The Company has the requisite corporate power and authority to
enter into and perform this Agreement,  the Registration  Rights Agreement,  the
Irrevocable  Transfer Agent  Instructions  (as defined in Section 5) and each of
the other  agreements  entered into by the parties hereto in connection with the

                                      -7-


transactions  contemplated  by this Agreement  (collectively,  the  "Transaction
Documents"), and to issue the Securities in accordance with the terms hereof and
thereof,  (ii) the execution and delivery of the  Transaction  Documents and the
Certificate of  Designations  by the Company and the  consummation  by it of the
transactions  contemplated hereby and thereby,  including without limitation the
issuance  of the  Preferred  Shares and the  reservation  for  issuance  and the
issuance of the  Conversion  Shares  issuable  upon  conversion  thereof and any
shares of Common  Stock  issued as payment of  Registration  Delay  Payments (as
defined in the Registration Rights Agreement),  have been duly authorized by the
Company's Board of Directors and no further consent or authorization is required
by  the  Company,  its  Board  of  Directors  or  its  stockholders,  (iii)  the
Transaction Documents have been duly executed and delivered by the Company, (iv)
the Transaction  Documents  constitute the valid and binding  obligations of the
Company  enforceable  against the Company in accordance with their terms, except
as such  enforceability  may be  limited  by  general  principles  of  equity or
applicable bankruptcy,  insolvency,  reorganization,  moratorium, liquidation or
similar laws relating to, or affecting generally,  the enforcement of creditors'
rights and remedies, and (v) prior to each of the Closing Dates, the Certificate
of Designations will have been filed with the Secretary of State of the State of
Delaware and will be in full force and effect,  enforceable  against the Company
in accordance with its terms.

                  c. Capitalization. The authorized capital stock of the Company
consists  of (i)  70,000,000  shares  of Common  Stock,  of which as of the date
hereof  37,888,090  shares were issued and  outstanding,  2,913,375  shares were
issuable and reserved for issuance  pursuant to the  Company's  stock option and
purchase  plans and  175,000  shares are  issuable  and  reserved  for  issuance
pursuant  to  securities  (other  than  the  Preferred  Shares)  exercisable  or
exchangeable  for,  or  convertible  into,  shares  of  Common  Stock  and  (ii)
10,000,000  shares of Preferred Stock, of which as of the date hereof, no shares
were issued and outstanding.  All of such outstanding  shares have been, or upon
issuance will be, validly issued and are fully paid and nonassessable. Except as
disclosed in Schedule  3(c),  (i) no shares of the  Company's  capital stock are
subject  to  preemptive  rights  or any  other  similar  rights  or any liens or
encumbrances suffered or permitted by the Company; (ii) there are no outstanding
debt securities; (iii) there are no outstanding options, warrants, scrip, rights
to subscribe to, calls or commitments of any character  whatsoever  relating to,
or securities  or rights  convertible  into,  any shares of capital stock of the
Company or any of its Subsidiaries, or contracts, commitments, understandings or
arrangements  by which the Company or any of its  Subsidiaries  is or may become

                                      -8-


bound to issue  additional  shares of capital stock of the Company or any of its
Subsidiaries  or options,  warrants,  scrip,  rights to  subscribe  to, calls or
commitments  of any  character  whatsoever  relating to, or securities or rights
convertible  into,  any  shares of  capital  stock of the  Company or any of its
Subsidiaries;  (iv) there are no  agreements  or  arrangements  under  which the
Company or any of its  Subsidiaries  is obligated to register the sale of any of
their securities under the 1933 Act (except the Registration  Rights Agreement);
(v)  there  are  no  outstanding  securities  of  the  Company  or  any  of  its
Subsidiaries which contain any redemption or similar  provisions,  and there are
no contracts,  commitments,  understandings or arrangements by which the Company
or any of its  Subsidiaries  is or may become  bound to redeem a security of the
Company or any of its Subsidiaries;  (vi) there are no securities or instruments
containing  anti-dilution  or similar  provisions  that will be triggered by the
issuance of the Securities as described in this Agreement; and (vii) the Company
does not  have  any  stock  appreciation  rights  or  "phantom  stock"  plans or
agreements  or any similar plan or  agreement.  The Company has furnished to the
Buyers true and correct copies of the Company's Certificate of Incorporation, as
amended   and  as  in  effect  on  the  date   hereof   (the   "Certificate   of
Incorporation"), and the Company's By-laws, as in effect on the date hereof (the
"By-laws"),  and the terms of all securities convertible into or exercisable for
Common Stock and the material rights of the holders thereof in respect thereto.

                  d.  Issuance  of  Securities.  The  Preferred  Shares are duly
authorized and, upon issuance in accordance with the terms hereof,  shall be (i)
validly issued,  fully paid and non-assessable,  (ii) free from all taxes, liens
and charges with respect to the issue  thereof and (iii)  entitled to the rights
and  preferences  set  forth  in  the  Certificate  of  Designations.  At  least
10,000,000  shares  of Common  Stock  (subject  to  adjustment  pursuant  to the
Company's  covenant set forth in Section  4(f) below) have been duly  authorized
and  reserved  for  issuance  upon  conversion  of the  Preferred  Shares.  Upon
conversion in accordance  with the Certificate of  Designations,  the Conversion
Shares will be, and any shares of Common Stock issued as payment of Registration
Delay  Payments  will  be,  validly   issued,   duly  listed,   fully  paid  and
nonassessable  and free from all taxes,  liens and charges  with  respect to the
issue  thereof,  with the holders  being  entitled  to all rights  accorded to a
holder of Common Stock. Based in part upon the representations and warranties of
the Buyers in Section 2, the issuance by the Company of the Securities is exempt
from registration under the 1933 Act.

                  e. No  Conflicts.  Except as disclosed in Schedule  3(e),  the
execution, delivery and performance of the Transaction Documents by the Company,
the  performance  by the Company of its  obligations  under the  Certificate  of
Designations   and  the   consummation  by  the  Company  of  the   transactions
contemplated hereby and thereby (including,  without limitation, the reservation
for  issuance and  issuance of the  Conversion  Shares) will not (i) result in a
violation of the Certificate of Incorporation,  any Certificate of Designations,
Preferences  and  Rights of any  outstanding  series of  Preferred  Stock of the

                                      -9-


Company or the By-laws; (ii) conflict with, or constitute a default (or an event
which with  notice or lapse of time or both would  become a default)  under,  or
give  to  others  any  rights  of   termination,   amendment,   acceleration  or
cancellation of, any agreement,  indenture or instrument to which the Company or
any of its  Subsidiaries  is a party; or (iii) result in a violation of any law,
rule,  regulation,  order,  judgment  or  decree  (including  federal  and state
securities  laws and  regulations and the rules and regulations of the principal
market or exchange on which the Common Stock is traded or listed)  applicable to
the Company or any of its  Subsidiaries or by which any property or asset of the
Company or any of its Subsidiaries is bound or affected.  Except as disclosed in
Schedule 3(e),  neither the Company nor its  Subsidiaries is in violation of any
term  of  or  in  default  under  (i)  its  Certificate  of  Incorporation,  any
Certificate of Designations, Preferences and Rights of any outstanding series of
Preferred  Stock  or  By-laws  or  their  organizational   charter  or  by-laws,
respectively, or (ii) any material contract, agreement, mortgage,  indebtedness,
indenture,  instrument,  judgment,  decree  or  order  or any  statute,  rule or
regulation  applicable to the Company or its  Subsidiaries.  The business of the
Company and its Subsidiaries is not being conducted, and shall not be conducted,
in violation of any law,  ordinance or  regulation of any  governmental  entity,
except where such violations have not resulted or would not result, individually
or in the  aggregate,  in a  Material  Adverse  Effect.  Except as  specifically
contemplated  by this  Agreement  and as  required  under  the  1933  Act or the
securities  laws of the State of New York, the Company is not required to obtain
any consent, authorization or order of, or make any filing or registration with,
any court or governmental agency or any regulatory or self-regulatory  agency in
order for it to  execute,  deliver or perform  any of its  obligations  under or
contemplated by the Transaction  Documents or the Certificate of Designations in
accordance  with the terms  hereof or thereof.  Except as  disclosed in Schedule
3(e), all consents, authorizations,  orders, filings and registrations which the
Company is  required  to obtain  pursuant to the  preceding  sentence  have been
obtained  or  effected  on or prior  to the date  hereof.  The  Company  and its
Subsidiaries are unaware of any facts or circumstances  which might give rise to
any  of  the  foregoing.  The  Company  is  not  in  violation  of  the  listing
requirements  of The  Nasdaq  National  Market  as in  effect  on the date  this
representation and warranty is made or deemed to have been made and is not aware
of any facts which would  reasonably  lead to  delisting  or  suspension  of the
Common Stock by The Nasdaq National Market in the foreseeable future.

                  f. SEC Documents;  Financial Statements.  Since June 30, 1997,
the  Company  has filed all  reports,  schedules,  forms,  statements  and other
documents  required  to be filed by it with the SEC  pursuant  to the  reporting
requirements  of the  1934  Act (all of the  foregoing  filed  prior to the date
hereof and all exhibits included therein and financial  statements and schedules
thereto and  documents  incorporated  by  reference  therein  being  hereinafter
referred to as the "SEC Documents").  The Company has delivered to each Buyer or
its respective representatives true and complete copies of the SEC Documents. As
of their respective  dates, the SEC Documents  complied in all material respects
with the  requirements  of the 1934 Act and the rules and regulations of the SEC
promulgated  thereunder  applicable  to the SEC  Documents,  and none of the SEC
Documents,  at the time they  were  filed  with the SEC,  contained  any  untrue
statement of a material  fact or omitted to state a material fact required to be
stated therein or necessary in order to make the statements therein, in light of
the  circumstances  under  which they were  made,  not  misleading.  As of their
respective  dates,  the financial  statements of the Company included in the SEC
Documents  complied  as  to  form  in  all  material  respects  with  applicable
accounting  requirements and the published rules and regulations of the SEC with
respect thereto. Such financial statements have been prepared in accordance with
generally  accepted  accounting  principles,  consistently  applied,  during the
periods  involved  (except (i) as may be otherwise  indicated in such  financial
statements  or the  notes  thereto,  or (ii) in the  case of  unaudited  interim
statements,  to the extent they may exclude  footnotes  or may be  condensed  or
summary  statements)  and fairly present in all material  respects the financial
position  of  the  Company  as of the  dates  thereof  and  the  results  of its

                                      -10-


operations  and cash flows for the periods then ended  (subject,  in the case of
unaudited   statements,   to  normal  year-end  audit  adjustments).   No  other
information  provided by or on behalf of the Company to the Buyers  which is not
included  in the  SEC  Documents,  including,  without  limitation,  information
referred to in Section 2(d) of this Agreement,  contains any untrue statement of
a material fact or omits to state any material  fact  necessary in order to make
the statements therein, in the light of the circumstance under which they are or
were made, not  misleading.  Neither the Company nor any of its  Subsidiaries or
any of their officers,  directors,  employees or agents have provided the Buyers
with any material, nonpublic information.

                  g. Absence of Certain Changes. Except as disclosed in Schedule
3(g) or the SEC  Documents  filed at least 10 days prior to the date  hereof and
available through Edgar, since June 30, 1998, there has been no material adverse
change  and  no  material  adverse  development  in  the  business,  properties,
operations, financial condition, liabilities, results of operations or prospects
of the Company or its  Subsidiaries.  The  Company has not taken any steps,  and
does not currently expect to take any steps, to seek protection  pursuant to any
bankruptcy  law  nor  does  the  Company  or any of its  Subsidiaries  have  any
knowledge or reason to believe that its creditors intend to initiate involuntary
bankruptcy proceedings.

                  h.  Absence  of   Litigation.   There  is  no  action,   suit,
proceeding,  inquiry  or  investigation  before or by any court,  public  board,
government  agency,  self-regulatory  organization  or body  pending  or, to the
knowledge  of the  Company  or any of its  Subsidiaries,  threatened  against or
affecting the Company, the Common Stock or any of the Company's  Subsidiaries or
any of the  Company's or the  Company's  Subsidiaries'  officers or directors in
their capacities as such, except as expressly set forth in Schedule 3(h).

                  i.  Acknowledgment  Regarding  Buyers'  Purchase of  Preferred
Shares.  The Company  acknowledges  and agrees that each of the Buyers is acting
solely in the capacity of arm's length purchaser with respect to the Transaction
Documents and the Certificate of Designation and the  transactions  contemplated
thereby.  The Company  further  acknowledges  that each Buyer is not acting as a
financial  advisor or fiduciary of the Company (or in any similar capacity) with
respect to the Transaction Documents and the Certificate of Designations and the
transactions  contemplated  thereby and any advice given by any of the Buyers or
any of  their  respective  representatives  or  agents  in  connection  with the
Transaction  Documents and the Certificate of Designations  and the transactions
contemplated  thereby  is merely  incidental  to such  Buyer's  purchase  of the
Securities.  The Company  further  represents  to each Buyer that the  Company's
decision to enter into the  Transaction  Documents  has been based solely on the
independent evaluation by the Company and its representatives.

                  j.  No  Undisclosed  Events,   Liabilities,   Developments  or
Circumstances. No event, liability,  development or circumstance has occurred or

                                      -11-


exists,  with  respect to the Company or its  Subsidiaries  or their  respective
business, properties,  prospects,  operations or financial condition, that would
be required to be disclosed by the Company under applicable securities laws on a
registration  statement  (including by way of  incorporation by reference) filed
with  the SEC on the  date  this  representation  is made or  deemed  to be made
relating  to an issuance  and sale by the Company of its Common  Stock and which
has not been publicly disclosed.

                  k. No General  Solicitation.  Neither the Company,  nor any of
its affiliates, nor any person acting on its or their behalf, has engaged in any
form of general  solicitation  or general  advertising  (within  the  meaning of
Regulation  D under  the 1933 Act) in  connection  with the offer or sale of the
Securities.

                  l. No Integrated Offering. Neither the Company, nor any of its
affiliates,  nor any  person  acting on its or their  behalf  has,  directly  or
indirectly,  made any offers or sales of any security or solicited any offers to
buy any security,  under circumstances that would require registration of any of
the  Securities  under the 1933 Act or cause this  offering of  Securities to be
integrated  with prior  offerings by the Company for purposes of the 1933 Act or
any applicable stockholder approval provisions,  including,  without limitation,
under the rules and  regulations of The Nasdaq Stock Market,  Inc., nor will the
Company or any of its  Subsidiaries  take any action or steps that would require
registration  of the Securities  under the 1933 Act or cause the offering of the
Securities to be integrated with other offerings.

                  m.  Employee  Relations.  Neither  the  Company nor any of its
Subsidiaries is involved in any union labor dispute nor, to the knowledge of the
Company or any of its Subsidiaries, is any such dispute threatened.  Neither the
Company  nor any of its  Subsidiaries  is a  party  to a  collective  bargaining
agreement,  and the Company and its  Subsidiaries  believe that  relations  with
their employees are good. No executive officer (as defined in Rule 501(f) of the
1933 Act) has  notified  the  Company  that such  officer  intends  to leave the
Company or otherwise terminate such officer's employment with the Company.

                  n.   Intellectual   Property  Rights.   The  Company  and  its
Subsidiaries  own or possess  adequate rights or licenses to use all trademarks,
trade names, service marks, service mark registrations,  service names, patents,
patent  rights,  copyrights,   inventions,  licenses,  approvals,   governmental
authorizations,  trade secrets and rights  necessary to conduct their respective
businesses as now conducted.  Except as set forth on Schedule 3(n),  none of the
Company's  trademarks,  trade names,  service marks, service mark registrations,
service  names,  patents,  patent  rights,  copyrights,   inventions,  licenses,
approvals,  government  authorizations,  trade  secrets  or  other  intellectual
property  rights  have  expired  or  terminated,  or are  expected  to expire or
terminate within two years from the date of this Agreement.  The Company and its
Subsidiaries do not have any knowledge of any infringement by the Company or its
Subsidiaries  of  trademarks,   trade  name  rights,   patents,  patent  rights,
copyrights,  inventions,  licenses,  service names,  service marks, service mark
registrations,  trade secrets or other similar rights of others,  or of any such

                                      -12-


development  of similar or identical  trade secrets or technical  information by
others and, except as set forth on Schedule 3(n),  there is no claim,  action or
proceeding being made or brought against, or to the Company's  knowledge,  being
threatened against, the Company or its Subsidiaries regarding trademarks,  trade
name rights, patents, patent rights, inventions,  copyrights,  licenses, service
names,  service  marks,  service  mark  registrations,  trade  secrets  or other
infringement;  and the Company and its  Subsidiaries are unaware of any facts or
circumstances which might give rise to any of the foregoing. The Company and its
Subsidiaries  have taken  reasonable  security  measures to protect the secrecy,
confidentiality and value of all of their intellectual properties.

                  o.  Environmental  Laws. The Company and its  Subsidiaries (i)
are in compliance with any and all applicable foreign,  federal, state and local
laws and regulations  relating to the protection of human health and safety, the
environment  or  hazardous  or  toxic   substances  or  wastes,   pollutants  or
contaminants ("Environmental Laws"), (ii) have received all permits, licenses or
other approvals required of them under applicable  Environmental Laws to conduct
their  respective  businesses  and  (iii) are in  compliance  with all terms and
conditions  of  any  such  permit,   license  or  approval,   except  where  the
non-compliance  or failure to receive such permits,  licenses or other approvals
would not result in a Material Adverse Effect.

                  p.  Title.  The  Company  and its  Subsidiaries  have good and
marketable  title in fee  simple to all real  property  and good and  marketable
title to all personal  property  owned by them which is material to the business
of the Company and its  Subsidiaries,  in each case free and clear of all liens,
encumbrances  and defects  except such as are described in Schedule 3(p) or such
as do not materially affect the value of such property and do not interfere with
the use made and  proposed to be made of such  property by the Company or any of
its  Subsidiaries.  Any real  property  and  facilities  held under lease by the
Company or any of its Subsidiaries are held by them under valid,  subsisting and
enforceable leases with such exceptions as are not material and do not interfere
with the use made and proposed to be made of such  property and buildings by the
Company and its Subsidiaries.

                  q.  Insurance.  The Company and each of its  Subsidiaries  are
insured by insurers of recognized financial  responsibility  against such losses
and risks and in such  amounts  as  management  of the  Company  believes  to be
prudent  and  customary  in  the   businesses  in  which  the  Company  and  its
Subsidiaries  are engaged.  Neither the Company nor any such Subsidiary has been
refused any insurance coverage sought or applied for and neither the Company nor
any such  Subsidiary has any reason to believe that it will not be able to renew
its existing  insurance  coverage as and when such coverage expires or to obtain
similar  coverage  from  similar  insurers as may be  necessary  to continue its
business at a cost that would not materially and adversely affect the condition,
financial or otherwise,  or the earnings,  business or operations of the Company
and its Subsidiaries, taken as a whole.

                                      -13-



                  r.  Regulatory  Permits.  The  Company  and  its  Subsidiaries
possess,  except  where  the lack of such  possession  will not have a  Material
Adverse  Effect on the Company,  all  certificates,  authorizations  and permits
issued by the  appropriate  federal,  state or  foreign  regulatory  authorities
necessary to conduct their  respective  businesses as conducted on the date this
representation  is made or deemed to be made,  and  neither  the Company nor any
such  Subsidiary  has  received  any  notice  of  proceedings  relating  to  the
revocation or modification of any such certificate, authorization or permit.

                  s. Internal Accounting  Controls.  The Company and each of its
Subsidiaries  maintain a system of internal  accounting  controls  sufficient to
provide  reasonable  assurance that (i)  transactions are executed in accordance
with  management's  general or specific  authorizations,  (ii)  transactions are
recorded  as  necessary  to  permit  preparation  of  financial   statements  in
conformity with generally accepted  accounting  principles and to maintain asset
accountability,  (iii) access to assets is  permitted  only in  accordance  with
management's   general  or  specific   authorization   and  (iv)  the   recorded
accountability  for assets is compared  with the existing  assets at  reasonable
intervals and appropriate action is taken with respect to any differences.

                  t. No Materially Adverse  Contracts,  Etc. Neither the Company
nor any of its Subsidiaries is subject to any charter,  corporate or other legal
restriction,  or any judgment,  decree,  order,  rule or regulation which in the
judgment of the  Company's  officers  has or is expected in the future to have a
Material  Adverse Effect.  Neither the Company nor any of its  Subsidiaries is a
party to any  contract  or  agreement  which in the  judgment  of the  Company's
officers has or is expected to have a Material Adverse Effect.

                  u. Tax  Status.  Except as set  forth on  Schedule  3(u),  the
Company  and each of its  Subsidiaries  has made or filed all  federal and state
income and all other tax  returns,  reports  and  declarations  required  by any
jurisdiction  to which it is subject  (unless  and only to the  extent  that the
Company  and each of its  Subsidiaries  has set  aside on its  books  provisions
reasonably  adequate for the payment of all unpaid and unreported taxes) and has
paid all taxes and other governmental  assessments and charges that are material
in  amount,  shown  or  determined  to be  due  on  such  returns,  reports  and
declarations,  except  those being  contested in good faith and has set aside on
its books provision reasonably adequate for the payment of all taxes for periods
subsequent to the periods to which such returns,  reports or declarations apply.
There are no unpaid taxes in any material amount claimed to be due by the taxing
authority of any jurisdiction,  and the officers of the Company know of no basis
for any such claim.

                  v. Certain Transactions.  Except as set forth on Schedule 3(v)
or in the SEC  Documents  filed at least ten days  prior to the date  hereof and
except  for  arm's  length  transactions  pursuant  to which the  Company  makes
payments in the ordinary  course of business upon terms no less  favorable  than
the Company  could  obtain from third  parties and other than the grant of stock
options  disclosed  on  Schedule  3(c),  none  of the  officers,  directors,  or

                                      -14-


employees  of the  Company  is  presently  a party to any  transaction  with the
Company  or any of its  Subsidiaries  (other  than for  services  as  employees,
officers and directors),  including any contract, agreement or other arrangement
providing for the furnishing of services to or by,  providing for rental of real
or personal property to or from, or otherwise  requiring payments to or from any
officer,  director or such  employee or, to the  knowledge  of the Company,  any
corporation,  partnership, trust or other entity in which any officer, director,
or any such  employee  has a  substantial  interest or is an officer,  director,
trustee or partner.

                  w. Dilutive Effect.  The Company  understands and acknowledges
that the number of Conversion  Shares  issuable upon conversion of the Preferred
Shares will increase in certain circumstances.  The Company further acknowledges
that its obligation to issue Conversion  Shares upon conversion of the Preferred
Shares in accordance  with this Agreement and the Certificate of Designations is
absolute and unconditional  regardless of the dilutive effect that such issuance
may have on the ownership interests of other stockholders of the Company.

                  x. No Other  Agreements.  The  Company  has not,  directly  or
indirectly,  made  any  agreements  with any  Buyers  relating  to the  terms or
conditions of the transactions  contemplated by the Transaction Documents except
as set forth in the Transaction Documents.

                  y.  Application of Takeover  Protections.  The Company and its
board of directors have taken all necessary  action,  if any, in order to render
inapplicable any control share acquisition,  business  combination,  poison pill
(including  any  distribution   under  a  rights  agreement)  or  other  similar
anti-takeover  provision under the Certificate of  Incorporation  or the laws of
the state of its incorporation which is or could become applicable to the Buyers
as a result  of the  transactions  contemplated  by this  Agreement,  including,
without  limitation,  the Company's  issuance of the  Securities and the Buyer's
ownership of the Securities.

                  z.  Rights  Agreement.  The Company  specifically  represents,
warrants and agrees that, in accordance  with the Rights  Agreement (the "Rights
Agreement"),  dated as of January 23,  1998,  between  the Company and  American
Stock Transfer and Trust Company,  as rights agent,  regardless of the number of
Conversion Shares of which each Buyer is deemed the Beneficial Owner (as defined
in the Rights Plan, none of the Buyers is intended to be or will be deemed to be
an  Acquiring  Person  within  the  meaning of the  Rights  Plan  because of the
acquisition of the Securities (including the Conversion Shares) pursuant to this
Agreement,  and the  acquisition  of the  Securities  (including  the Conversion
Shares) pursuant to this Agreement, shall not, under any circumstances,  trigger
a Distribution  Date within the meaning of the Rights Plan;  provided,  however,
that only Securities (including the Conversion Shares) acquired pursuant to this
Agreement  shall be deemed  excluded  from the number of shares of Common  Stock
deemed  beneficially owned by each Buyer in determining whether such Buyer is an
Acquiring Person within the meaning of the Rights Plan.

                                      -15-


                  aa. Foreign Corrupt Practices. Neither the Company, nor any of
its Subsidiaries,  nor any director,  officer,  agent,  employee or other person
acting on behalf of the Company or any of its Subsidiaries has, in the course of
its actions for, or on behalf of, the Company,  used any corporate funds for any
unlawful contribution,  gift,  entertainment or other unlawful expenses relating
to  political  activity;  made any direct or  indirect  unlawful  payment to any
foreign or  domestic  government  official  or employee  from  corporate  funds;
violated  or is in  violation  of any  provision  of the  U.S.  Foreign  Corrupt
Practices Act of 1977, as amended; or made any unlawful bribe,  rebate,  payoff,
influence payment, kickback or other unlawful payment to any foreign or domestic
government official or employee.

                  bb. Foreign  Qualification.   With  respect  to the  Company's
certificate of authority to transact  business  in the state of New Jersey,  the
Company owes no more than $25,000 in fees, expenses,  back taxes or penalties to
the State of New Jersey or its affiliates.


         4.       COVENANTS.

                  a. Best Efforts.  Each party shall use its best efforts timely
to satisfy each of the conditions  to be satisfied by it as provided in Sections
6 and 7 of this Agreement.

                  b. Form D. The Company agrees to file a Form D with respect to
the Securities as required  under  Regulation D and to provide a copy thereof to
each Buyer promptly after such filing.  The Company shall,  on or before each of
the Closing Dates, take such action as the Company shall reasonably determine is
necessary to qualify the Securities for, or obtain  exemption for the Securities
for, sale to the Buyers at each of the Closings pursuant to this Agreement under
applicable securities or "Blue Sky" laws of the states of the United States, and
shall provide  evidence of any such action so taken to the Buyers on or prior to
the Closing Date. The Company shall make all filings and reports relating to the
offer and sale of the Securities  required under applicable  securities or "Blue
Sky" laws of the  states of the  United  States  following  each of the  Closing
Dates.

                  c. Reporting  Status.  Until the earlier of (i) the date which
is one year after the date as of which the Investors (as that term is defined in
the Registration Rights Agreement) may sell all of the Conversion Shares without
restriction pursuant to Rule 144(k) promulgated under the 1933 Act (or successor
thereto),  or (ii) the date on which (A) the  Investors  shall have sold all the
Conversion  Shares  and any  shares of Common  Stock  issued as  payment  of the
Registration  Delay  Payments,  if any, and (B) none of the Preferred  Shares is
outstanding  (the  "Registration  Period"),  the Company  shall file all reports
required  to be filed with the SEC  pursuant  to the 1934 Act,  and the  Company
shall not terminate  its status as an issuer  required to file reports under the
1934 Act even if the 1934 Act or the  rules  and  regulations  thereunder  would
otherwise permit such termination.

                                      -16-



                  d. Use of Proceeds. The Company will use the proceeds from the
sale  of the  Preferred  Shares  for  substantially  the  same  purposes  and in
substantially the same amounts as indicated in Schedule 4(d).

                  e.  Financial  Information.  The  Company  agrees  to send the
following to each  Investor (as defined in the  Registration  Rights  Agreement)
during the Registration Period: (i) within two (2) days after the filing thereof
with the SEC, a copy of its Annual Reports on Form 10-K,  its Quarterly  Reports
on Form 10-Q, any Current Reports on Form 8-K and any registration statements or
amendments  (other than on Form S-8) filed pursuant to the 1933 Act; (ii) on the
same day as the release  thereof,  facsimile copies of all press releases issued
by the Company or any of its  Subsidiaries  and (iii)  copies of any notices and
other  information  made available or given to the  stockholders  of the Company
generally,  contemporaneously with the making available or giving thereof to the
stockholders.

                  f.  Reservation  of Shares.  The Company shall take all action
necessary  to at all times have  authorized,  and  reserved  for the  purpose of
issuance,  no less than 200% of the number of shares of Common  Stock  needed to
provide  for the  issuance  of the  Conversion  Shares  (without  regard  to any
limitations on conversions).

                  g. Additional  Financing;  Right of Participation.  Subject to
the  exceptions  described  below,  the  Company  agrees  that during the period
beginning  on the date hereof and ending on the date which is 180 days after the
Initial  Closing  Date  neither  the Company  nor its  Subsidiaries  (which term
"Subsidiaries"   for  the  purpose  of  this  Section  (g)  shall   exclude  IBC
Pharmaceuticals  L.L.C.  ("IBC")) will, without the prior written consent of the
holders  of  the  Preferred  Shares  representing  at  least  two-thirds  of the
Preferred Shares then  outstanding,  consummate any equity financing  (including
any debt financing with an equity  component) or issue any equity  securities of
the Company or any Subsidiary or securities  convertible or exchangeable into or
for  equity  securities  of  the  Company  or  any  Subsidiary  (including  debt
securities  with an equity  component)  in any form.  Subject to the  exceptions
described below, the Company agrees that during the period beginning on the date
hereof  and  ending  on the  Put  Closing  Date,  neither  the  Company  nor its
Subsidiaries  will,  without  the prior  written  consent of the  holders of the
Preferred  Shares  representing at least two-thirds of the Preferred Shares then
outstanding,  consummate any equity financing (including any debt financing with
an equity component) of any Convertible  Security (as defined in the Certificate
of  Designation)  which has a Variable  Price (as defined in the  Certificate of
Designation) component ("Future Offering"), unless it shall have first delivered
to each Buyer or a designee  appointed by such Buyer written notice (the "Future
Offering Notice")  describing the proposed Future Offering,  including the terms
and conditions thereof,  and providing each Buyer an option to purchase up to of
its Aggregate  Percentage (as defined below),  as of the date of delivery of the
Future Offering Notice, in the Future Offering on the same

                                      -17-


terms and conditions set forth in the Future  Offering  Notice.  The limitations
referred to in the  preceding two sentence are  collectively  referred to as the
"Capital  Raising  Limitation".  For purposes of this Section  4(g),  "Aggregate
Percentage"  at any time with  respect to any Buyer  shall  mean the  percentage
obtained by multiplying (A) 50% by (B) the quotient  resulting from dividing (i)
the aggregate number of Preferred Shares purchased by such Buyer at the Closings
by (ii) the aggregate  number of Preferred Shares purchased by all Buyers at the
Closings. A Buyer can exercise its option to participate in a Future Offering by
delivering  written  notice thereof to the Company within five (5) business days
(the "Response  Period")of  receipt of a Future  Offering  Notice,  which notice
shall state the quantity of securities being offered in the Future Offering that
such Buyer will  purchase,  up to its Aggregate  Percentage,  and that number of
securities it is willing to purchase in excess of its Aggregate  Percentage.  In
the event  that one or more  Buyers  fail to elect to  purchase  up to each such
Buyer's  Aggregate  Percentage  then each Buyer which has  indicated  that it is
willing to purchase a number of securities in excess of its Aggregate Percentage
shall be entitled  to  purchase  its pro rata  portion  (determined  in the same
manner as described in the preceding  sentence) of the  securities in the Future
Offering  which one or more  Buyers have not  elected to  purchase.  The Company
shall have 45 days  after  expiration  of the  Response  Period to  execute  the
transaction  documents  necessary to close and sell the securities of the Future
Offering for which such Buyers' rights were not  exercised,  upon the same terms
and conditions  (including the amount thereof)  specified in the Future Offering
Notice. In the event the Company has not executed such transaction documents for
the sale of such  securities of the Future  Offering  within such 45 day period,
the Company shall not  thereafter  issue or sell such  securities  without first
offering such  securities  to the Buyers in the manner  provided in this Section
4(g).  The  Capital  Raising  Limitation  shall  not  apply to (i) a loan from a
commercial bank without any equity component, (ii) any transaction involving the
Company's   issuances  of  securities  (A)  as  consideration  in  a  merger  or
consolidation  or similar  transaction,  (B) in  connection  with any  strategic
partnership  or joint  venture  (the  primary  purpose  of which is not to raise
equity  capital),  or (C) as  consideration  for the  acquisition of a business,
product or license or other assets by the Company,  (iii) the issuance of Common
Stock in a firm commitment, underwritten public offering with net proceeds of at
least  $10,000,000,  (iv) the issuance of securities upon exercise or conversion
of the Company's options,  warrants or other convertible  securities outstanding
as of the date hereof, (v) the grant of additional  options or warrants,  or the
issuance  of  additional  securities,  under  any  Company  stock  option  plan,
restricted  stock plan or stock  purchase  plan for the benefit of the Company's
employees or directors,  or (vi) any equity security of the Company issued after
November 17, 1998 and on or prior to December 31, 1998  pursuant to the terms of
the Structured Equity Line Flexible Financing  Agreement (the "Structural Equity
Agreement"),  between  Cripple  Creek  Securities  L.L.C.,  a  Delaware  limited
liability  company("Cripple  Creek")  and the  Company,  as  attached  hereto as
Exhibit E. The Buyers  shall not be required to  participate  or exercise  their
right of participation  with respect to a particular Future Offering in order to
exercise their right of first refusal with respect to later Future Offerings.

                                      -18-


                  h. Listing.  The Company shall promptly  secure the listing of
all of the  Registrable  Securities  (as  defined  in  the  Registration  Rights
Agreement) upon each national securities exchange and automated quotation system
(including  The Nasdaq  National  Market),  if any,  upon which shares of Common
Stock  are then  listed  (subject  to  official  notice of  issuance)  and shall
maintain,  so long as any other shares of Common Stock shall be so listed,  such
listing of all Registrable Securities from time to time issuable under the terms
of the Transaction  Documents and the Certificate of  Designations.  The Company
shall  maintain  the  Common  Stock's  authorization  for  listing on The Nasdaq
National  Market or The New York Stock  Exchange,  Inc.  ("NYSE").  Neither  the
Company nor any of its  Subsidiaries  shall take any action  which may result in
the delisting or suspension of the Common Stock on The Nasdaq National Market or
NYSE (other than to switch  listings  from The National  Nasdaq Market to NYSE).
The  Company  shall  promptly  provide  to each Buyer  copies of any  notices it
receives  from The  Nasdaq  National  Market  or NYSE  regarding  the  continued
eligibility of the Common Stock for listing on such automated  quotation  system
or  securities  exchange.  The  Company  shall  pay all  fees  and  expenses  in
connection with satisfying its obligations under this Section 4(h).

                  i.  Expenses.  Subject to Section  9(l) below,  following  the
Initial Closing, the Company shall reimburse the Buyers for the Buyers' expenses
(including  attorneys'  fees and expenses) in connection  with  negotiating  and
preparing  the  Transaction   Documents  and   consummating   the   transactions
contemplated thereby up to an aggregate of $50,000.

                  j.  Transactions  With  Affiliates.  So long as any  Preferred
Shares  are  outstanding  the  Company  shall not,  and shall  cause each of its
Subsidiaries  not to, enter into,  amend,  modify or  supplement,  or permit any
Subsidiary  to  enter  into,  amend,   modify  or  supplement,   any  agreement,
transaction,  commitment  or  arrangement  with  any of its or any  Subsidiary's
officers,  directors,  person who were  officers or directors at any time during
the  previous two years,  stockholders  who  beneficially  own 5% or more of the
Common Stock, or affiliates or with any individual related by blood, marriage or
adoption to any such  individual  or with any entity in which any such entity or
individual  owns a 5% or more  beneficial  interest  (each a  "Related  Party"),
except  for (a)  customary  employment  arrangements  and  benefit  programs  on
reasonable terms, (b) any agreement,  transaction,  commitment or arrangement on
an arms-length basis on terms no less favorable than terms which would have been
obtainable  from a person other than such Related  Party,  or (c) any agreement,
transaction,  commitment or  arrangement  which is approved by a majority of the
disinterested directors of the Company. For purposes hereof, any director who is
also an officer of the Company or any  Subsidiary  of the Company shall not be a
disinterested  director  with  respect  to  any  such  agreement,   transaction,
commitment or arrangement.  "Affiliate" for purposes hereof means,  with respect
to any person or entity,  another person or entity that, directly or indirectly,
(i) has a 5% or more equity  interest  in that person or entity,  (ii) has 5% or

                                      -19-


more common ownership with that person or entity,  (iii) controls that person or
entity,  or (iv) shares common control with that person or entity.  "Control" or
"controls"  for  purposes  hereof  means  that a person or entity has the power,
direct or  indirect,  to  conduct or govern the  policies  of another  person or
entity.

                  k.  Filing of Form 8-K.  On or before the fifth  business  day
following  the  Initial  Closing  Date and on or before the first  business  day
following the Put Closing Date and the Put Share Notice Date,  the Company shall
file  a  Form  8-K  with  the  SEC  describing  the  terms  of  the  transaction
contemplated by the  Transaction  Documents and consummated on such Closing Date
or the Put  Share  Notice  Date,  as the case may be,  in each  case in the form
required by the 1934 Act.

                  l. Proxy Statement. The Company shall provide each stockholder
entitled  to vote at the next  meeting of  stockholders  of the  Company,  which
meeting  shall  occur on or before the  earlier of (A) the date which is 75 days
after the Proxy  Statement  Triggering  Date (as defined below) and (B) the date
which is 105 days after the Closing Date (the "Stockholder Meeting Deadline"), a
proxy statement,  which has been previously reviewed by the Buyers and a counsel
of their choice,  soliciting each such  stockholder's  affirmative  vote at such
stockholder  meeting  for  approval  of  the  Company's  issuance  of all of the
Securities  as described in this  Agreement,  and the Company shall use its best
efforts to (i)  solicit  its  stockholders'  approval  of such  issuance  of the
Securities  and (ii) cause the Board of Directors of the Company to recommend to
the stockholders that they approve such proposal. If the Company fails to hold a
meeting of its  stockholders  by the  Stockholder  Meeting  Deadline,  then,  as
partial  relief  (which  remedy  shall not be  exclusive  of any other  remedies
available  at law or in  equity),  the  Company  shall  pay to  each  holder  of
Preferred  Shares an amount in cash per Preferred  Share equal to the product of
(i) $10,000; multiplied by (ii) .02; multiplied by (iii) the quotient of (x) the
number of days  after the  Stockholder  Meeting  Deadline  that a meeting of the
Company's  stockholders  is not held,  divided by (y) 30. The Company shall make
the payments referred to in the immediately  preceding sentence within five days
of the earlier of (I) the holding of the meeting of the Company's  stockholders,
the failure of which resulted in the requirement to make such payments, and (II)
the  last  day of  each  30-day  period  beginning  on the  Stockholder  Meeting
Deadline.  In the event the  Company  fails to make  such  payments  in a timely
manner,  such  payments  shall bear  interest at the rate of 1.5% per month (pro
rated for partial months) until paid in full. "Proxy Statement  Triggering Date"
shall mean the first date after the date of this  Agreement  on which the sum of
(A) the number of shares of Common Stock  previously  issued upon  conversion of
any of the  shares of  Preferred  Stock  and (B) the  number of shares of Common
Stock issuable upon conversion of all the outstanding  shares of Preferred Stock
based on the  Conversion  Price  in  effect  on the  date of such  determination
(without regard to any limitation upon the conversion of any shares of Preferred
Stock,  equal to or exceeds 15% of the number of shares of Common  Stock  issued
and outstanding immediately prior to the Initial Closing Date.


                                      -20-



                  m. Trading  Restrictions.  Each Buyer  agrees,  for so long as
such Buyer owns any Preferred  Shares,  that during the period  beginning on the
date  which is 45 trading  days  immediately  preceding  a  Conversion  Date (as
defined in the Certificate of  Designations) on which such Buyer has delivered a
Conversion  Notice (as defined in the Certificate of Designations) and ending on
the trading day which  immediately  precedes such  Conversion Date (the "Pricing
Period")  such  Buyer  shall not enter  into any  "short  sale" (as such term is
defined  in Rule  3b-3 of the  1934  Act) or  other  hedging  transaction  which
directly or  indirectly  involves the Common Stock (a "Short Sale  Transaction")
unless (i) such Buyer effects such "short sale" or hedging  transaction on a day
during such  Pricing  Period (a "Sales Day") at a price which is greater than or
equal to the lowest  sales price of the Common  Stock (as  reported by Bloomberg
Financial  Markets)  on such Sales Day and (ii) a sale of the  Common  Stock was
effected at such lowest sale price on the Sales Day by a seller  other than such
Buyer or its  Affiliates.  Each  Buyer  further  agrees  that  during the period
beginning on the date which is 25 trading days  immediately  preceding  the date
which is 180 days after the Initial Closing Date and ending on the date which is
180 days after the Initial  Closing Date such Buyer shall not enter into a Short
Sale Transaction.

                  n.  Underwriting  Lock-Up  Agreement.  At any time  during the
period beginning on the Initial Closing Date and ending on the Maturity Date, if
any,  the Company may require that all, but not less than all, of the holders of
the Preferred Shares enter into a "lock-up" agreement with the underwriters of a
public  offering of the Common Stock  pursuant to which the holders  would agree
not to sell or transfer any  Conversion  Shares issued with respect to Preferred
Shares  converted  on  Conversion  Dates  (as  defined  in  the  Certificate  of
Designations) during the period beginning on the date designated by the Company,
which date shall be not less than 10 business days after the holders' receipt of
such notice,  and ending on the date which is up to 30 days after the  beginning
of the lock-up  period as designated by the Company (the  "Underwriting  Lock-Up
Period").  The Company shall  exercise this right by delivering  written  notice
(the  "Lock-Up  Request  Notice")  of such  request to all of the holders of the
Preferred Shares then outstanding at least 10 business days prior to the date on
which the  Underwriting  Lock-Up Period will begin, but in no event prior to the
filing of the  registration  statement for such proposed  offering.  The Lock-Up
Request  Notice  shall state (i) that the  underwriters  of such  offering  have
requested  that the  holders of the  Preferred  Shares  enter  into a  "lock-up"
agreement,  (ii) the date on which the  Underwriting  Lock-Up Period will begin,
and  (iii)  the name of the  managing  underwriters  of the  proposed  offering.
Notwithstanding the foregoing,  the Company shall not be entitled to require the
holders to enter into a "lock-up" agreement unless (A) the Underwriting  Lock-Up
Period is not more  than 30 days,  (B) the  Underwriting  Lock-Up  Period  shall
terminate  immediately  upon (I) the  termination  or  abandonment or indefinite
delay of the  underwritten  offering,  (II) the  announcement  of a  pending  or
consummated Major Transaction or (III) the occurrence of a Triggering Event, (C)
all  officers  and  directors of the Company  enter into  substantially  similar
"lock-up"  agreements,  (D) such underwritten  public offering is completed at a
price per  share to the  public of not less  than  $4.00 per share  (subject  to

                                      -21-


adjustment  as a result of any stock split,  stock  dividend,  recapitalization,
reverse  stock split,  consolidation,  exchange or similar  event) and generates
aggregate gross proceeds to the Company of at least  $10,000,000,  (E) there has
been no other Underwriting  Lock-Up Period during the 365-day period immediately
preceding the first day of the Underwriting Lock-Up Period being requested,  (F)
during the period  beginning on and including the date which is 20 business days
prior to the filing of the registration  statement for the proposed offering and
ending on and including the first day of the  Underwriting  Lock-Up Period,  the
Registration  Statement has been  effective and available for sale of all of the
Registrable  Securities,  there  has been no Grace  Period  (as  defined  in the
Registration  Rights  Agreement)  and  there  has  been no stop  order  or other
regulatory prohibition on trading of the Common Stock and (G) the offering shall
be underwritten by one or more of the underwriters included on Schedule 4(n). In
the event the Company requires an Underwriting Lock-Up Period, the Maturity Date
(as defined in the Certificate of  Designations)  shall be extended two (2) days
for each day in the  Underwriting  Lock-Up Period as provided in Section 2(g) of
the  Certificate  of  Designations.  If the Company  delivers a Lock-Up  Request
Notice and the underwritten public offering is not consummated within 90 days of
the first day of the  Underwritten  Lock-Up  Period,  then the  Company  may not
require another Underwritten Lock-Up Period pursuant to this Section 4(n).

                  o. Cripple  Creek.  The Company will  terminate its ability to
draw down  additional  financing  and its  obligation  to issue  any  additional
warrants  pursuant to the Structured  Equity  Agreement with Cripple Creek on or
prior to December 31, 1998 other than those warrants for which the obligation to
issue  pursuant  to the  Structural  Equity  Agreement  was  earned on or before
December 31, 1998.

                  p. Foreign  Qualification.  The Company will become authorized
to do business in the state of New Jersey on or prior to April 30, 1999.

                  q. Legends and Stop Transfer  Orders.  Upon the receipt by the
Company of a copy of an irrevocable  proxy,  executed in accordance with Section
7(a)(xv),  the Company  shall  instruct the  Transfer  Agent to either (a) place
legends on those certificates subject to such proxy or (b) place a stop transfer
order on such certificates, in accordance with such proxy.

         5.       TRANSFER AGENT INSTRUCTIONS.


                                      -22-



                  The  Company  shall  issue  irrevocable  instructions  to  its
transfer  agent,  and any  subsequent  transfer  agent,  to issue  certificates,
registered  in the name of each  Buyer  or its  respective  nominee(s),  for the
Conversion  Shares in such amounts as specified  from time to time by each Buyer
to the  Company  upon  conversion  of the  Preferred  Shares  (the  "Irrevocable
Transfer Agent  Instructions").  Prior to registration of the Conversion  Shares
and the Dividend Shares under the 1933 Act, all such certificates shall bear the
restrictive  legend  specified  in Section 2(g) of this  Agreement.  The Company
warrants  that  no  instruction  other  than  the  Irrevocable   Transfer  Agent
Instructions  referred to in this Section 5, and stop transfer  instructions  to
give effect to Section 2(f) hereof (in the case of the Conversion Shares,  prior
to  registration  of the Conversion  Shares under the 1933 Act) will be given by
the Company to its transfer  agent and that the  Securities  shall  otherwise be
freely transferable on the books and records of the Company as and to the extent
provided in this Agreement and the  Registration  Rights  Agreement.  Nothing in
this Section 5 shall affect in any way each Buyer's  obligations  and agreements
set forth in Section  2(g) to comply  with all  applicable  prospectus  delivery
requirements,  if any, upon resale of the  Securities.  If a Buyer  provides the
Company  with  an  opinion  of  counsel,  in  generally  acceptable  form,  that
registration of a resale by such Buyer of any of such Securities is not required
under the 1933 Act, the Company shall permit the  transfer,  and, in the case of
the Conversion Shares, promptly instruct its transfer agent to issue one or more
certificates in such name and in such  denominations  as specified by such Buyer
and without any restrictive  legends.  The Company acknowledges that a breach by
it of its  obligations  hereunder will cause  irreparable  harm to the Buyers by
vitiating  the  intent  and  purpose  of the  transaction  contemplated  hereby.
Accordingly, the Company acknowledges that the remedy at law for a breach of its
obligations  under this Section 5 will be inadequate and agrees, in the event of
a breach or threatened  breach by the Company of the  provisions of this Section
5, that the  Buyers  shall be  entitled,  in  addition  to all  other  available
remedies,  to an  injunction  restraining  any  breach and  requiring  immediate
issuance  and  transfer,  without the  necessity  of showing  economic  loss and
without any bond or other security being required.


         6.       CONDITIONS TO THE COMPANY'S OBLIGATION TO SELL.

                  a.  Initial  Closing  Date.  The  obligation  of  the  Company
hereunder  to issue and sell the Initial  Preferred  Shares to each Buyer at the
Initial Closing is subject to the satisfaction, at or before the Initial Closing
Date, of each of the following  conditions,  provided that these  conditions are
for the  Company's  sole benefit and may be waived by the Company at any time in
its sole discretion by providing each Buyer with prior written notice thereof:

                  (i) Such Buyer  shall have  executed  each of the  Transaction
         Documents and delivered the same to the Company.

                                      -23-


                  (ii) The  Certificate  of  Designations  shall have been filed
         with the Secretary of State of the State of Delaware.

                  (iii)  Such Buyer  shall have  delivered  to the  Company  the
         Purchase Price for the Preferred  Shares being  purchased by such Buyer
         at the Initial Closing by wire transfer of immediately  available funds
         pursuant to the wire instructions provided by the Company.

                  (iv) The representations and warranties of such Buyer shall be
         true and correct as of the date when made and as of the Initial Closing
         Date as  though  made at that  time  (except  for  representations  and
         warranties that speak as of a specific date), and such Buyer shall have
         performed,  satisfied and complied with the  covenants,  agreements and
         conditions  required  by the  Transaction  Documents  to be  performed,
         satisfied  or  complied  with by such Buyer at or prior to the  Initial
         Closing Date.

                  (v)      All 1,250  Initial Preferred  Shares  shall have been
         purchased  by one or more of the Buyers.

                  (vi) On the Initial  Closing Date,  no legal  action,  suit or
         proceeding  shall be pending or  threatened  which seeks to restrain or
         prohibit the transactions contemplated by this Agreement.

                  b. Put Closing Date. The  obligation of the Company  hereunder
to issue and sell the Put  Preferred  Shares to each Buyer at the Put Closing is
subject to the  satisfaction,  at or before the Put Closing Date, of each of the
following conditions,  provided that these conditions are for the Company's sole
benefit and may be waived by the Company at any time in its sole  discretion  by
providing each Buyer with prior written notice thereof:

                  (i)  Such  Buyer  shall  have  delivered  to the  Company  the
         Purchase  Price for the Put  Preferred  Shares being  purchased by such
         Buyer at the Put  Closing by wire  transfer  of  immediately  available
         funds pursuant to the wire instructions provided by the Company.

                  (ii) The representations and warranties of such Buyer shall be
         true and  correct  as of the date when  made and as of the Put  Closing
         Date as  though  made at that  time  (except  for  representations  and
         warranties that speak as of a specific date), and such Buyer shall have
         performed,  satisfied and complied with the  covenants,  agreements and
         conditions  required  by the  Transaction  Documents  to be  performed,
         satisfied or complied with by such Buyer at or prior to the Put Closing
         Date.

                  (iii)  On the Put  Closing  Date,  no  legal  action,  suit or
         proceeding  shall be pending or  threatened  which seeks to restrain or
         prohibit the transactions contemplated by this Agreement.

                                      -24-



         7.       CONDITIONS TO EACH BUYER'S OBLIGATION TO PURCHASE.

                  a.  Initial   Closing  Date.  The  obligation  of  each  Buyer
hereunder to purchase  the Initial  Preferred  Shares at the Initial  Closing is
subject to the  satisfaction,  at or before the Initial Closing Date, of each of
the following  conditions,  provided that these  conditions are for each Buyer's
sole benefit and may be waived by such Buyer at any time in its sole discretion:

                  (i) The Company shall have  executed  each of the  Transaction
         Documents, and delivered the same to such Buyer.

                  (ii) The  Certificate of  Designations,  shall have been filed
         with  the  Secretary  of State of the  State  of  Delaware,  and a copy
         thereof  certified by such Secretary of State shall have been delivered
         to such Buyer.

                  (iii) The Common Stock shall be  authorized  for  quotation on
         The Nasdaq  National  Market or listing on NYSE,  trading in the Common
         Stock issuable upon  conversion of the Initial  Preferred  Shares to be
         traded  on The  Nasdaq  National  Market  or NYSE  shall  not have been
         suspended by the SEC, The Nasdaq Stock Market,  Inc. or NYSE and all of
         the Conversion Shares issuable upon conversion of the Initial Preferred
         Shares  to be sold at the  Initial  Closing  shall be  listed  upon The
         Nasdaq National Market or NYSE.

                  (iv) The  representations  and warranties of the Company shall
         be true and  correct  as of the date  when  made and as of the  Initial
         Closing  Date as though made at that time  (except for  representations
         and warranties  that speak as of a specific date) and the Company shall
         have performed,  satisfied and complied with the covenants,  agreements
         and conditions required by the Transaction  Documents or Certificate of
         Designations to be performed, satisfied or complied with by the Company
         at or prior to the Initial Closing Date. Such Buyer shall have received
         a certificate,  executed by the Chief Executive Officer of the Company,
         dated as of the Initial Closing Date, to the foregoing  effect,  and an
         update as of the Initial Closing Date of the  representation  contained
         in Section 3(c) above.

                  (v) Such Buyer  shall  have  received  the  opinion of Warshaw
         Burstein Cohen  Schlesinger & Kuh, LLP dated as of the Initial  Closing
         Date, in form,  scope and  substance  reasonably  satisfactory  to such
         Buyer and in substantially the form of Exhibit C attached hereto.

                                      -25-


                  (vi) The Company  shall have  executed  and  delivered to such
         Buyer the Stock Certificates (in such denominations as such Buyer shall
         request) for the Initial Preferred Shares being purchased by such Buyer
         at the Initial Closing.

                  (vii) The Board of Directors of the Company shall have adopted
         resolutions  consistent  with  Section  3(b)(ii)  above  and  in a form
         reasonably acceptable to such Buyer (the "Resolutions").

                  (viii) As of the Initial  Closing Date, the Company shall have
         reserved out of its  authorized and unissued  Common Stock,  solely for
         the purpose of effecting the  conversion of the  Preferred  Shares,  at
         least 10,000,000 shares of Common Stock.

                  (ix) The Irrevocable Transfer Agent Instructions,  in the form
         of  Exhibit  D  attached  hereto,  shall  have  been  delivered  to and
         acknowledged in writing by the Company's transfer agent.

                  (x)  The  Company  shall  have   delivered  to  such  Buyer  a
         certificate  evidencing  the  incorporation  and good  standing  of the
         Company  and  each  Subsidiary  (other  than  subsidiaries   which  are
         organized outside of the United States) in such corporation's  state of
         incorporation  issued  by the  Secretary  of  State  of such  state  of
         incorporation as of a date within 10 days of the Initial Closing.

                  (xi)  The  Company  shall  have  delivered  to  such  Buyer  a
         secretary's  certificate certifying as to (A) the Resolutions,  (B) the
         Certificate of Incorporation and (C) By-laws,  each as in effect at the
         Initial Closing.

                  (xii)  The  Company  shall  have  delivered  to  such  Buyer a
         certified copy of its Certificate of  Incorporation as certified by the
         Secretary  of State of the  State of  Delaware  within  ten days of the
         Initial Closing Date.

                  (xiii) The Company shall have delivered to such Buyer a letter
         from the Company's  transfer  agent  certifying the number of shares of
         Common Stock  outstanding  as of a date within five days of the Initial
         Closing Date.

                  (xiv) On the Initial  Closing Date,  no legal action,  suit or
         proceeding  shall be pending or  threatened  which seeks to restrain or
         prohibit the transactions contemplated by this Agreement.

                  (xv) The Company shall have delivered to such Buyers copies of
         proxy  agreements,  in a form  reasonably  acceptable  to  such  buyer,
         executed by each executive officer and director of the Company pursuant
         to which such persons  agree to vote in favor of the matters  described

                                      -26-


         in  Section  4(l) and which  cover a minimum  of 27.7% of the shares of
         Common Stock outstanding on the date hereof.

                  (xvi) The  Company  shall  have  delivered  to such Buyer such
         other  documents  relating  to  the  transactions  contemplated  by the
         Transaction  Documents  as such  Buyer or its  counsel  may  reasonably
         request.

                  b. Put Closing Dates.  The obligation of each Buyer  hereunder
to  purchase  the Put  Preferred  Shares at the Put  Closing  is  subject to the
satisfaction,  at or  before  the Put  Closing  Date,  of each of the  following
conditions, provided that these conditions are for each Buyer's sole benefit and
may be waived by such Buyer at any time in its sole discretion:

                  (i) The Company shall have complied with the  requirements  of
         Section 1(c) and all of the Put Notice  Conditions set forth in Section
         1(d) shall have been satisfied.

                  (ii) The Certificate of  Designations,  shall be in full force
         and effect and shall not have been  amended  since the Initial  Closing
         Date,  and a copy thereof  certified  by the  Secretary of State of the
         State of Delaware shall have been delivered to such Buyer.

                  (iii) The Common Stock shall be  authorized  for  quotation on
         The Nasdaq  National  Market or listing on NYSE,  trading in the Common
         Stock issuable upon conversion of the Put Preferred Shares to be traded
         on The Nasdaq  National Market or NYSE shall not have been suspended by
         the  SEC,  The  Nasdaq  Stock  Market,  Inc.  or  NYSE  and  all of the
         Conversion  Shares issuable upon conversion of the Put Preferred Shares
         to be sold at the Put Closing shall be listed upon The Nasdaq  National
         Market or NYSE.

                  (iv) The  representations  and warranties of the Company shall
         be true and  correct as of the date when made and as of the Put Closing
         Date as  though  made at that  time  (except  for  representations  and
         warranties that speak as of a specific date) and the Company shall have
         performed,  satisfied and complied with the  covenants,  agreements and
         conditions required by the Transaction  Documents or the Certificate of
         Designations to be performed, satisfied or complied with by the Company
         at or prior to the Put Closing  Date.  Such Buyer shall have received a
         certificate,  executed by the Chief  Executive  Officer of the Company,
         dated as of the Put  Closing  Date,  to the  foregoing  effect,  and an
         update as of the Put Closing  Date of the  representation  contained in
         Section 3(c) above.

                  (v) Such Buyer  shall  have  received  the  opinion of Warshaw
         Burstein Cohen Schlesinger & Kuh, LLP dated as of the Put Closing Date,
         in form, scope and substance reasonably  satisfactory to such Buyer and
         in substantially the form of Exhibit C attached hereto.

                                      -27-


                  (vi) The Company  shall have  executed  and  delivered to such
         Buyer the Stock Certificates (in such denominations as such Buyer shall
         request) for the Put Preferred  Shares being purchased by such Buyer at
         the Put Closing.

                  (vii)  The  Board  of  Directors  of the  Company  shall  have
         adopted, and shall not have amended, the Resolutions.

                  (viii) As of the Put  Closing  Date,  the  Company  shall have
         reserved out of its  authorized and unissued  Common Stock,  solely for
         the purpose of effecting  the  conversion of the  Preferred  Shares,  a
         number of shares of Common  Stock  equal to at least 200% of the number
         of shares of Common Stock which would be issuable  upon  conversion  in
         full of the then  outstanding  Preferred  Shares (without regard to any
         limitations  on  conversions),  including  for  such  purposes  the Put
         Preferred Shares to be issued at such Put Closing.

                  (ix) The Irrevocable  Transfer Agent Instructions shall remain
         in effect as of the Put Closing  Date and the  Company  shall cause its
         Transfer Agent to deliver a letter to the Buyers to that effect.

                  (x)  The  Company  shall  have   delivered  to  such  Buyer  a
         certificate  evidencing  the  incorporation  and good  standing  of the
         Company and each Subsidiary in the state of such corporation's state of
         incorporation  issued  by the  Secretary  of  State  of such  state  of
         incorporation as of a date within 10 days of the Put Closing Date.

                  (xi)  The  Company  shall  have  delivered  to  such  Buyer  a
         certified copy of its Certificate of  Incorporation as certified by the
         Secretary of State of the State of Delaware  within ten days of the Put
         Closing Date.

                  (xii)  The  Company  shall  have  delivered  to  such  Buyer a
         secretary's  certificate certifying as to (A) the Resolutions,  (B) the
         Certificate of Incorporation and (C) By-laws,  each as in effect at the
         Put Closing.

                  (xiii) The Company shall have delivered to such Buyer a letter
         from the Company's  transfer  agent  certifying the number of shares of
         Common  Stock  outstanding  as of a date  within  five  days of the Put
         Closing Date.

                  (xiv)  On the Put  Closing  Date,  no  legal  action,  suit or
         proceeding  shall be pending or  threatened  which seeks to restrain or
         prohibit the transactions contemplated by this Agreement.

                                      -28-


                  (xv) The Company shall have delivered to such Buyer such other
         documents  relating to the transactions  contemplated by this Agreement
         as such Buyer or its counsel may reasonably request.

         8.  INDEMNIFICATION.  In  consideration  of each Buyer's  execution and
delivery of the  Transaction  Documents and acquiring the Securities  thereunder
and in addition to all of the Company's other  obligations under the Transaction
Documents  and the  Certificate  of  Designations,  the  Company  shall  defend,
protect,  indemnify  and hold  harmless  each Buyer and each other holder of the
Securities and all of their  stockholders,  officers,  directors,  employees and
direct or indirect  investors and any of the foregoing  person's agents or other
representatives  (including,  without  limitation,  those retained in connection
with  the  transactions  contemplated  by  this  Agreement)  (collectively,  the
"Indemnitees")  from and against any and all actions,  causes of action,  suits,
claims, losses, costs, penalties, fees, liabilities and damages, and expenses in
connection therewith  (irrespective of whether any such Indemnitee is a party to
the  action  for which  indemnification  hereunder  is  sought),  and  including
reasonable  attorneys' fees and disbursements  (the "Indemnified  Liabilities"),
incurred by any Indemnitee as a result of, or arising out of, or relating to (a)
any  misrepresentation  or breach of any  representation or warranty made by the
Company in the  Transaction  Documents or the Certificate of Designations or any
other certificate,  instrument or document  contemplated hereby or thereby,  (b)
any breach of any covenant,  agreement or obligation of the Company contained in
the  Transaction  Documents  or the  Certificate  of  Designations  or any other
certificate,  instrument or document  contemplated hereby or thereby, or (c) any
cause of  action,  suit or claim  brought or made,  other  than by the  Company,
against such  Indemnitee and arising out of or resulting from (i) the execution,
delivery,  performance  or  enforcement  of  the  Transaction  Documents  or the
Certificate of Designations,  (ii) any transaction financed or to be financed in
whole or in part,  directly or indirectly,  with the proceeds of the issuance of
the  Securities or (iii) the status of such Buyer or holder of the Securities as
an investor in the Company. To the extent that the foregoing  undertaking by the
Company may be unenforceable for any reason,  the Company shall make the maximum
contribution  to the  payment  and  satisfaction  of  each  of  the  Indemnified
Liabilities  which is permissible  under applicable law. Except as otherwise set
forth  herein,  the  mechanics  and  procedures  with  respect  to the right and
obligations under this Section 8 shall be the same as those set forth in Section
6(a)  and  (d)  of  the  Registration  Rights  Agreement,   including,   without
limitation,  those  procedures  with respect to the settlement of the claims and
the Company's right, to assume the defense of claims.


         9.       GOVERNING LAW; MISCELLANEOUS.

                  a. Governing Law; Jurisdiction; Jury Trial. The corporate laws
of the State of Delaware shall govern all issues  concerning the relative rights
of the  Company  and  its  stockholders.  All  other  questions  concerning  the

                                      -29-


construction,  validity,  enforcement and interpretation of this Agreement shall
be governed by the internal laws of the State of New York, without giving effect
to any choice of law or conflict of law  provision or rule (whether of the State
of New York or any other  jurisdictions) that would cause the application of the
laws of any  jurisdictions  other than the State of New York.  Each party hereby
irrevocably  submits to the non-exclusive  jurisdiction of the state and federal
courts sitting the City of New York, borough of Manhattan,  for the adjudication
of any dispute  hereunder  or in  connection  herewith  or with any  transaction
contemplated  hereby or discussed herein,  and hereby  irrevocably  waives,  and
agrees not to assert in any suit, action or proceeding, any claim that it is not
personally subject to the jurisdiction of any such court, that such suit, action
or  proceeding  is  brought in an  inconvenient  forum or that the venue of such
suit,  action or proceeding is improper.  Each party hereby  irrevocably  waives
personal  service of process and  consents to process  being  served in any such
suit,  action or  proceeding  by  mailing a copy  thereof  to such  party at the
address for such notices to it under this Agreement and agrees that such service
shall  constitute  good and  sufficient  service of process and notice  thereof.
Nothing  contained herein shall be deemed to limit in any way any right to serve
process in any manner permitted by law. EACH PARTY HEREBY IRREVOCABLY WAIVES ANY
RIGHT IT MAY HAVE, AND AGREES NOT TO REQUEST,  A JURY TRIAL FOR THE ADJUDICATION
OF ANY  DISPUTE  HEREUNDER  OR IN  CONNECTION  HEREWITH  OR ARISING  OUT OF THIS
AGREEMENT OR ANY TRANSACTION CONTEMPLATED HEREBY.

                  b. Counterparts. This Agreement may be executed in two or more
identical  counterparts,  all of  which  shall  be  considered  one and the same
agreement and shall become effective when  counterparts have been signed by each
party and  delivered to the other  party;  provided  that a facsimile  signature
shall be  considered  due  execution  and shall be  binding  upon the  signatory
thereto with the same force and effect as if the signature were an original, not
a facsimile signature.

                  c.   Headings.   The  headings  of  this   Agreement  are  for
convenience   of   reference   and  shall  not  form  part  of,  or  affect  the
interpretation of, this Agreement.

                  d.  Severability.  If any provision of this Agreement shall be
invalid   or   unenforceable   in   any   jurisdiction,   such   invalidity   or
unenforceability  shall  not  affect  the  validity  or  enforceability  of  the
remainder  of  this   Agreement  in  that   jurisdiction   or  the  validity  or
enforceability of any provision of this Agreement in any other jurisdiction.

                  e. Entire Agreement; Amendments. This Agreement supersedes all
other prior oral or written agreements  between the Buyers,  the Company,  their
affiliates  and  persons  acting on their  behalf  with  respect to the  matters
discussed  herein,  and this  Agreement and the  instruments  referenced  herein
contain  the entire  understanding  of the parties  with  respect to the matters
covered  herein and therein  and,  except as  specifically  set forth  herein or
therein,  neither the Company nor any Buyer makes any representation,  warranty,
covenant or  undertaking  with  respect to such  matters.  No  provision of this

                                      -30-


Agreement may be amended  other than by an  instrument in writing  signed by the
Company  and the holders of at least  two-thirds  of the  Preferred  Shares then
outstanding,  and no provision  hereof may be waived other than by an instrument
in writing  signed by the party  against  whom  enforcement  is sought.  No such
amendment  shall be  effective to the extent that it applies to less than all of
the holders of the Preferred Shares then outstanding.  No consideration shall be
offered or paid to any person to amend or consent to a waiver or modification of
any  provision  of any of  the  Transaction  Documents  or  the  Certificate  of
Designations unless the same consideration also is offered to all of the parties
to the Transaction Documents or holders of the Preferred Shares, as the case may
be.

                  f.   Notices.   Any  notices,   consents,   waivers  or  other
communications  required  or  permitted  to be  given  under  the  terms of this
Agreement  must be in writing and will be deemed to have been delivered (i) upon
receipt,  when delivered  personally;  (ii) upon receipt, when sent by facsimile
(provided   confirmation  of  transmission  is  mechanically  or  electronically
generated and kept on file by the sending party);  or (iii) one (1) business day
after deposit with a nationally  recognized  overnight delivery service, in each
case  properly  addressed to the party to receive the same.  The  addresses  and
facsimile numbers for such communications shall be:

         If to the Company:

                  Immunomedics, Inc.
                  300 American Road
                  Morris Plains, NJ  07950
                  Telephone:        (973) 605-8200
                  Facsimile:        (973) 605-8311
                  Attention:        President

         With a copy to:

                  Warshaw Burstein Cohen Schlesinger & Kuh, LLP
                  555 Fifth Avenue
                  New York, NY  10017
                  Telephone:        (212) 984-7832
                  Facsimile:        (212) 984-7893
                  Attention:        Michael D. Schwamm

                                      -31-


         If to the Transfer Agent:

                  American Stock Transfer & Trust Company
                  40 Wall Street
                  New York, N.Y.
                  Telephone:        (718) 921-8247
                  Facsimile:        (718) 921-8323
                  Attention:        Wilbert Myles

If to a Buyer,  to it at the  address  and  facsimile  number  set  forth on the
Schedule of Buyers attached hereto, with copies to such Buyer's  representatives
as set  forth  on the  Schedule  of  Buyers,  or at such  other  address  and/or
facsimile  number  and/or to the attention of such other person as the recipient
party has specified by written  notice given to each other party five days prior
to the effectiveness of such change.  Written  confirmation of receipt (A) given
by the recipient of such notice,  consent,  waiver or other  communication,  (B)
mechanically  or  electronically  generated  by the sender's  facsimile  machine
containing the time, date,  recipient facsimile number and an image of the first
page of such transmission or (C) provided by a nationally  recognized  overnight
delivery service shall be rebuttable  evidence of personal  service,  receipt by
facsimile or receipt from a nationally  recognized overnight delivery service in
accordance with clause (i), (ii) or (iii) above, respectively.

                  g.  Successors and Assigns.  This  Agreement  shall be binding
upon and inure to the benefit of the parties and their respective successors and
assigns, including any purchasers of the Preferred Shares. The Company shall not
assign this Agreement or any rights or obligations  hereunder  without the prior
written  consent of the  holders of  two-thirds  of the  Preferred  Shares  then
outstanding  including  by merger or  consolidation.  A Buyer and any  Permitted
Assignees  (as defined  below) may assign  some or all of its rights  hereunder,
including  the Preferred  Shares (i) without the consent of the Company,  to any
person or entity who, immediately prior to such assignment,  is (A) an affiliate
of such Buyer, (B) a holder of Preferred Shares, (C) an entity or fund which has
the same  principal  investment  adviser  as the Buyer,  or (D) a pledgee  (or a
transferee  of such pledgee) in  connection  with a bona fide margin  account if
such pledgee seeks to enforce or realize such pledge (each such person or entity
described in the immediately  preceding clause (A), (B), (C) and (D) is referred
to as a "Permitted  Assignee")  and (ii) with the prior  written  consent of the
Company,  which consent  shall not be  unreasonably  withheld,  to any person or
entity; provided, however, that any such assignment shall not release such Buyer
from its  obligations  hereunder  unless  such  obligations  are assumed by such
assignee and the Company has consented to such assignment and assumption,  which
consent  shall not be  unreasonably  withheld.  Notwithstanding  anything to the
contrary   contained  in  the  Transaction   Documents  or  the  Certificate  of
Designations,  each  Buyer  shall  be  entitled  to  pledge  the  Securities  in
connection with a bona fide margin account.

                                      -32-


                  h. No Third Party  Beneficiaries.  This  Agreement is intended
for the benefit of the parties hereto and their respective  permitted successors
and  assigns,  and is not for the  benefit of, nor may any  provision  hereof be
enforced by, any other person.

                  i. Survival. Unless this Agreement is terminated under Section
9(l), the representations and warranties of the Company and the Buyers contained
in Sections 2 and 3, the agreements and covenants set forth in Sections 4, 5 and
9, and the indemnification provisions set forth in Section 8, shall survive each
of  the   Closings.   Each  Buyer  shall  be   responsible   only  for  its  own
representations, warranties, agreements and covenants hereunder.

                  j. Publicity.  The Company and each Buyer shall have the right
to approve  before  issuance any press  releases or any other public  statements
with respect to the transactions  contemplated hereby;  provided,  however, that
the Company shall be entitled,  without the prior approval of any Buyer, to make
any press release or other public  disclosure with respect to such  transactions
as is required by applicable law and  regulations  (although each Buyer shall be
consulted  by the  Company in  connection  with any such press  release or other
public  disclosure  prior  to its  release  and  shall be  provided  with a copy
thereof).

                  k. Further  Assurances.  Each party shall do and  perform,  or
cause to be done and  performed,  all such  further  acts and things,  and shall
execute and deliver all such other  agreements,  certificates,  instruments  and
documents,  as the other party may reasonably  request in order to carry out the
intent and accomplish the purposes of this Agreement and the consummation of the
transactions contemplated hereby.

                  l.  Termination.  In the event that the Initial  Closing shall
not have  occurred  with respect to a Buyer on or before three (3) business days
from the date hereof due to the Company's or such Buyer's failure to satisfy the
conditions  set forth in  Sections 6 and 7 above (and the  nonbreaching  party's
failure to waive such unsatisfied  condition(s)),  the nonbreaching  party shall
have the option to terminate this Agreement with respect to such breaching party
at the close of  business  on such date  without  liability  of any party to any
other party; provided, however, that if this Agreement is terminated pursuant to
this  Section  9(l),  the  Company  shall  remain  obligated  to  reimburse  the
non-breaching  Buyers for  expenses up to the amount  described  in Section 4(i)
above.

                  m. Placement  Agent.  The Company and each Buyer  acknowledges
that it has not engaged any placement  agent in connection  with the sale of the
Preferred  Shares.  Each party shall be  responsible  for the payment of its own
placement agent's fees or brokers' commissions relating to or arising out of the
transactions  contemplated  hereby.  The Company  shall pay, and hold each Buyer
harmless against, any liability, loss or expense (including, without limitation,
attorneys' fees and out of pocket expenses)  arising in connection with any such
claim.  Each Buyer shall,  severally and not jointly,  pay, and hold the Company
harmless against, any liability,  loss or expense (including without limitation,

                                      -33-


attorneys' fees and out of pocket expenses)  arising in connection with any such
claim.

                  n. No Strict Construction. The language used in this Agreement
will be deemed to be the language  chosen by the parties to express their mutual
intent, and no rules of strict construction will be applied against any party.

                  o. Remedies. Each Buyer and each holder of Preferred Shares or
Conversion  Shares  shall  have  all  rights  and  remedies  set  forth  in  the
Transaction  Documents and the  Certificate  of  Designation  and all rights and
remedies  which  such  holders  have been  granted  at any time  under any other
agreement  or contract  and all of the rights  which such holders have under any
law. Any person having any rights under any provision of this Agreement shall be
entitled to enforce such rights  specifically  (without  posting a bond or other
security),  to recover  damages by reason of any breach of any provision of this
Agreement and to exercise all other rights granted by law.

                  p. Payment Set Aside.  To the extent that the Company  makes a
payment or payments  to the Buyers  hereunder  or  pursuant to the  Registration
Rights  Agreement or the  Certificate of  Designations  or the Buyers enforce or
exercise their rights  hereunder or thereunder,  and such payment or payments or
the  proceeds  of  such   enforcement  or  exercise  or  any  part  thereof  are
subsequently invalidated,  declared to be fraudulent or preferential, set aside,
recovered from, disgorged by or are required to be refunded, repaid or otherwise
restored to the Company,  a trustee,  receiver or any other person under any law
(including, without limitation, any bankruptcy law, state or federal law, common
law or equitable  cause of action),  then to the extent of any such  restoration
the  obligation  or part thereof  originally  intended to be satisfied  shall be
revived and  continued  in full force and effect as if such payment had not been
made or such enforcement or setoff had not occurred.

                                   * * * * * *

                                      -34-



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

COMPANY:                             BUYERS:

IMMUNOMEDICS, INC.                   HFTP INVESTMENT L.L.C.
                                     By:  Promethean Investment Group L.L.C.
                                     Its: Investment Manager
By:                                                  
Name:         Robert S. DeLuccia
Its:          President and Chief    By:
              Executive Officer      Name:      James F. O'Brien, Jr.
                                     Its:       Managing Member

                                     WINGATE CAPITAL LTD.

                                     By:
                                     Name:      Kenneth A. Simpler
                                     Its:       Vice President

                                     FISHER CAPITAL LTD.

                                     By:
                                     Name:      Kenneth A. Simpler
                                     Its:       Vice President

                                     LEONARDO, L.P.

                                     By:        ANGELO, GORDON & CO., L.P.
                                     Its:       General Partner

                                     By:
                                     Name:      Michael L. Gordon
                                     Its:       Chief Operating Officer





                                     GAM ARBITRAGE INVESTMENTS, INC.

                                     By:        ANGELO, GORDON & CO., L.P.
                                     Its:       Investment Advisor

                                     By:
                                     Name:      Michael L. Gordon
                                     Its:Chief Operating Officer

                                     AG SUPER FUND INTERNATIONAL PARTNERS, L.P.

                                     By:        ANGELO, GORDON & CO., L.P.
                                     Its:       General Partner

                                     By:
                                     Name:      Michael L. Gordon
                                     Its:       Chief Operating Officer

                                     RAPHAEL, L.P.

                                     By:
                                     Name:      Michael L. Gordon
                                     Its:       Chief Operating Officer

                                     RAMIUS FUND, LTD.

                                     By:        AG RAMIUS PARTNERS, L.L.C.
                                     Its:       Investment Advisor

                                     By:
                                     Name:      Michael L. Gordon
                                     Its:       Managing Officer





                               SCHEDULE OF BUYERS

- --------------------------------------------------------------------------------------------------------------------------
                                                                          
                                                                       Number of     
                                                                        Initial       
                                        Investor Address               Preferred     Investor's Representatives' Address
   Investor Name                      and Facsimile Number               Shares             and Facsimile Number

HFTP Investment L.L.C.      Promethean Investment Group, L.L.C.           650       Promethean Investment Group, L.L.C.
                            40 West 57th Street, Suite 1520                         40 West 57th Street, Suite 1520
                            New York, New York 10019                                New York, New York 10019
                            Attn: James F. O'Brien, Jr.                             Attn: James F. O'Brien, Jr.
                            Telephone: 212-698-0588                                 Telephone: 212-698-0588
                            Facsimile: 212-698-0505                                 Facsimile: 212-698-0505
                            Residence: New York
                                                                                    Katten Muchin & Zavis
                                                                                    525 West Monroe, Suite 1600
                                                                                    Chicago, Illinois  60661-3693
                                                                                    Attn:  Robert J. Brantman, Esq.
                                                                                    Telephone: 312-902-5200
                                                                                    Facsimile:  312-902-1061

Wingate Capital Ltd.        Citadel Investment Group, L.L.C.              105       Citadel Investment Group, L.L.C.
                            225 West Washington Street                              225 West Washington Street
                            Chicago, Illinois  60606                                Chicago, Illinois  60606
                            Attention: Daniel Hopkins                               Attention: Daniel Hopkins
                            Facsimile: (312) 338-0780                               Facsimile: (312) 338-0780
                            Telephone: (312) 338-7803                               Telephone: (312) 338-7803

                                                                                    Katten Muchin & Zavis
                                                                                    525 W. Monroe Street
                                                                                    Chicago, Illinois 60661-3693
                                                                                    Attention: Robert J. Brantman, Esq.
                                                                                    Facsimile: (312) 902-1061
                                                                                    Telephone: (312) 902-5200

Fisher Capital Ltd.         Citadel Investment Group, L.L.C.              195       Citadel Investment Group, L.L.C.
                            225 West Washington Street                              225 West Washington Street
                            Chicago, Illinois  60606                                Chicago, Illinois  60606
                            Attention: Daniel Hopkins                               Attention: Daniel Hopkins
                            Facsimile: (312) 338-0780                               Facsimile: (312) 338-0780
                            Telephone: (312) 338-7803                               Telephone: (312) 338-7803

                                                                                    Katten Muchin & Zavis
                                                                                    525 W. Monroe Street
                                                                                    Chicago, Illinois 60661-3693
                                                                                    Attention: Robert J. Brantman, Esq.
                                                                                    Facsimile: (312) 902-1061
                                                                                    Telephone: (312) 902-5200

Leonardo, L.P.              c/o Angelo, Gordon & Co., L.P.                200       Angelo, Gordon & Co., L.P.
                            245 Park Avenue - 26th Floor                            245 Park Avenue - 26th Floor
                            New York, New York 10167                                New York, New York 10167
                            Attention: Gary Wolf or Ari Storch                      Attention: Gary Wolf or Ari Storch
                            Facsimile: (212) 867-6449                               Facsimile: (212) 867-6449
                            Telephone: (212) 692-2035                               Telephone: (212) 692-2035
                            Residence: Cayman Islands




                                                                           
GAM Arbitrage               c/o Angelo, Gordon & Co., L.P.                 20       Angelo, Gordon & Co., L.P.
Investments, Inc.           245 Park Avenue - 26th Floor                            245 Park Avenue - 26th Floor
                            New York, New York 10167                                New York, New York 10167
                            Attention: Gary Wolf or Ari Storch                      Attention: Gary Wolf or Ari Storch
                            Facsimile: (212) 867-6449                               Facsimile: (212) 867-6449
                            Telephone: (212) 692-2035                               Telephone: (212) 692-2035
                            Residence: British Virgin Islands

AG Super Fund               c/o Angelo, Gordon & Co., L.P.                 20       Angelo, Gordon & Co., L.P.
International Partners,     245 Park Avenue - 26th Floor                            245 Park Avenue - 26th Floor
L.P.                        New York, New York 10167                                New York, New York 10167
                            Attention: Gary Wolf or Ari Storch                      Attention: Gary Wolf or Ari Storch
                            Facsimile: (212) 867-6449                               Facsimile: (212) 867-6449
                            Telephone: (212) 692-2035                               Telephone: (212) 692-2035
                            Residence: Cayman Islands

Raphael, L.P.               c/o Angelo, Gordon & Co., L.P.                 20       Angelo, Gordon & Co., L.P.
                            245 Park Avenue - 26th Floor                            245 Park Avenue - 26th Floor
                            New York, New York 10167                                New York, New York 10167
                            Attention: Gary Wolf or Ari Storch                      Attention: Gary Wolf or Ari Storch
                            Facsimile: (212) 867-6449                               Facsimile: (212) 867-6449
                            Telephone: (212) 692-2035                               Telephone: (212) 692-2035
                            Residence: Cayman Islands

Ramius Fund, Ltd.           c/o Angelo, Gordon & Co., L.P.                 40       Angelo, Gordon & Co., L.P.
                            245 Park Avenue - 26th Floor                            245 Park Avenue - 26th Floor
                            New York, New York 10167                                New York, New York 10167
                            Attention: Gary Wolf or Ari Storch                      Attention: Gary Wolf or Ari Storch
                            Facsimile: (212) 867-6449                               Facsimile: (212) 867-6449
                            Telephone: (212) 692-2035                               Telephone: (212) 692-2035
                            Residence: Bermuda
                         -----------------------------------------------         -----------------------------------------




                                    SCHEDULES

Schedule of Buyers
Schedule 3(a)       -      Subsidiaries
Schedule 3(c)       -      Capitalization
Schedule 3(e)       -      Conflicts
Schedule 3(g)       -      Material Changes
Schedule 3(h)       -      Litigation
Schedule 3(n)       -      Intellectual Property
Schedule 3(p)       -      Liens
Schedule 3(u)       -      Tax Status
Schedule 3(v)       -      Certain Transactions
Schedule 4(d)       -      Use of Proceeds
Schedule 4(n)       -      Schedule of Underwriters


                                    EXHIBITS

Exhibit A           -      Form of Certificate of Designations,  Preferences and
                           Rights of the Preferred Shares
Exhibit B           -      Form of Registration Rights Agreement
Exhibit C           -      Form of Company Counsel Opinion
Exhibit D           -      Form of Irrevocable Transfer Agent Instructions
Exhibit E           -      Cripple Creek Financing Documents