IMMUNOMEDICS INC
8-K, 1998-12-15
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
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                       SECURITIES AND EXCHANGE COMMISSION

                             Washington, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934


       Date of Report (Date of earliest event reported): December 9, 1998



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




         Delaware                       0-12104                 61-1009366
(State or Other Jurisdiction          (Commission)             (IRS Employer
     of  Incorporation)               File Number)           Identification No.)




        300 American Road, Morris Plains, New Jersey        07950
         (Address of principal executive offices)         (Zip Code)




       Registrant's telephone number, including area code: (973) 605-8200




          (Former name or former address, if changed since last report)

<PAGE>



Item 5.  Other Events

         On December 9, 1998,  Immunomedics,  Inc. (the  "Company")  completed a
private  placement of 1,250 shares of Series F Convertible  Preferred Stock, par
value $.01 per share ( "Series F Stock") to several institutional investors (the
"Investors") and received gross proceeds of $12,500,000.

         Each share of Series F Stock has an initial  stated  value of  $10,000,
which increases at the rate of 4% per annum (such amount, as increased from time
to time, the "Liquidation  Value"). The Series F Stock is convertible,  in whole
or in part at the option of the holder,  beginning  on June 8, 1999,  subject to
acceleration in certain  instances,  into such number of shares of the Company's
common stock,  par value $.01 per share (the "Common Stock") as is determined by
dividing  the  Liquidation  Value by the  conversion  price then in effect.  The
conversion  price is equal to (a) the  Variable  Conversion  Price  (as  defined
below),  if such  Variable  Conversion  Price is less than the Trigger Price (as
defined below), (b) the Trigger Price, if the Variable Conversion Price is equal
to or greater than the Trigger  Price and less than 150% of the Trigger Price or
(c) the Trigger Price plus one-half of the amount, if any, by which the Variable
Conversion  Price exceeds 150% of the Trigger Price, if the Variable  Conversion
Price is greater that 150% of the Trigger Price. The "Trigger Price" is equal to
125% of the Initial  Fixed  Price.  The  "Initial  Fixed  Price" is equal to the
average  closing bid price of the Common Stock during the 20 trading days ending
June 6, 1999. The "Variable  Conversion Price" is equal to the average of the 15
lowest  closing  bid  prices  for the Common  Stock  during the 45 trading  days
preceding a conversion date.

         To the extent that the Series F Stock would be  convertible  at a price
less than 90% of the Initial Fixed Price,  the Investors  have agreed to certain
restrictions  on the  number of shares of Series F Stock  that can be  converted
during the first several  months after the Series F Stock  becomes  convertible.
Any shares of Series F Stock outstanding on December 9, 2003 will  automatically
be converted into Common Stock.

         Subject to  certain  conditions  and  limitations,  including  that the
Variable  Conversion  Price has been at least equal to 125% of the Trigger Price
for a specified period of time, the Company, during the 90-day period commencing
on December 1, 1999 may, at its option,  require the Investors to purchase up to
an  additional  750  shares  ($7.5  million)  of Series F Stock.  Under  certain
circumstances and at certain prices,  the Company may elect to redeem any shares
of Series F Stock and under certain  circumstances  may require the Investors to
convert  their  Series F Stock.  The Company has granted the  Investors  certain
participation  rights if the Company issues any future floating rate convertible
securities.

         Upon the  occurrence  of a Major  Transaction  (as  defined  in Section
(3)(c) of the Amended  Certificate of  Designations,  Preferences  and Rights of
Series F Convertible  Preferred Stock (the  "Certificate of  Designations")),  a
Trigger Event (as defined in Section (3)(d) of the Certificate of Designations),
or the delisting of the Common Stock from the Nasdaq  National Market other than
as a result of the  limitations  imposed by the Exchange Cap (as defined below),
the  Investors  may  require the Company to redeem the Series F Stock at a price
per share  (the  "Redemption  Price")  equal to the  greater  of (i) 125% of the
Liquidation  Value  and  (ii)  the  value  of the  Common  Stock  issuable  upon
conversion of the Series F Stock.

         Notwithstanding the foregoing,  under the circumstances set forth below
in lieu of permitting  the holders of the Series F Stock to required the Company
to redeem their Series F Stock, the Company may elect the following:

         (a) if,  despite  the best  efforts of the  Company,  the  registration
statement  (the  "Registration  Statement")  under  the  Securities  Act of 1933
covering  the  resale  by  the  investors  of the  Common  Stock  issuable  upon
conversion  of the Series F Stock is not declared  effective on or before May 8,
1999; then

                                        2

<PAGE>



the Company,  at its option, may (x) redeem the Series F Stock at the Redemption
Price or (y) pay a  penalty  equal to 1% of the  Liquidation  Value per day (the
"Redemption  Penalty") and readjust the Initial Fixed Price to 80% of the lowest
Variable  Conversion  Price  during  the period  commencing  the 150th day after
closing and ending on the day the Registration Statement is declared effective.

         (b) if, after the Registration  Statement becomes effective and despite
the best  efforts of the Company to keep it available  for use by the  Investor;
such Registration  Statement ceases to be available for more than 10 consecutive
days, then the Company,  at its option, may (x) redeem the Series F Stock at the
Redemption  Price or (y) pay the  Redemption  Penalty and  readjust  the Initial
Fixed Price to 80% of the lowest  Variable  Conversion  Price  during the period
commencing on the day the Registration  Statement became  unavailable and ending
on the day the Registration Statement is again available for use.

         (c) if the Common  Stock is delisted  from the Nasdaq  National  Market
(other than as a result of a voluntary  delisting  by the Company as a result of
the Exchange Cap; then the Company,  at its option,  may (x) redeem the Series F
Stock at the  Redemption  Price or (y) readjust the Initial Fixed Price to 68.5%
of the lowest Variable Conversion Price during the period commencing on the date
of delisting and  continuing  for 45 days  thereafter or (z) pay the  Redemption
Penalty.

         (d) if a purchase,  tender or exchange  offer is accepted by holders of
more than a specified  percentage  of the Common Stock which was not approved or
recommended  by the Board of  Directors  of the  Company  or a proxy or  consent
solicitation  is made which results is  consolidation,  merger or other business
combination  where  such  proxy or  consent  solicitation  was not  approved  or
recommended  by the Board of Directors of the Company;  then the Company may (x)
redeem the Preferred Shares at the Liquidation Value or (y) readjust the Initial
Fixed  Price to 80% of the lower of (A) the  lowest  Variable  Conversion  Price
during the period  beginning on the date such offer or solicitation is announced
and ending on the date such offer or solicitation  is consummated,  abandoned or
terminated  or (B)  the  Initial  Fixed  Price  then  in  effect  or (z) pay the
Redemption Penalty.

         The  Company is not  required  to pay the  Redemption  Penalty,  in the
aggregate, for more than 15 days (or 10 days in the case of the events set forth
in clause (d) above) in any 365-day period.

         The Company also has agreed to hold a Special  Meeting of  Stockholders
on or before March 24, 1999, to seek approval of the issuance of any shares upon
conversion  of the Series F Stock in excess of 20% of the number of  outstanding
shares of Common Stock on December 9, 1998 (i.e.,  7,577,617 in accordance  with
the rules and The Nasdaq  Market,  Inc. (the  "Exchange  Cap").  Approval of the
proposal will only require a majority of the shares voting in person or by proxy
at the Special Meeting of Stockholders.  Dr. Goldenberg,  certain members of his
family and certain executive  officers of the Company,  holding in the aggregate
approximately 30% of the currently  outstanding Common Stock have agreed to vote
their  shares in favor of such  proposal.  Such  persons also have agreed not to
dispose of shares  constituting  approximately 27% of the currently  outstanding
shares of Common  Stock  prior to such  stockholders  meeting.  The  Company has
agreed,  among other things,  to the payment of certain penalties if the Special
Meeting  is not held on or  before  March  24,  1999 or if the  proposal  is not
approved by stockholders.

         The  Investors   have  agreed  that  if  they  engage  in  short  sales
transactions or other hedging  activities during the 45 trading days immediately
preceding a Conversion  Date (the "Pricing  Period") which involve,  among other
things,  sales of shares of Common Stock,  the  Investors  will place their sale
orders for common stock in the course of such  activities  so as not to complete
or effect any such sale on any trading day during the Pricing  Period at a price
which is lower than the lowest sale  effected on such day by persons  other than
such Investor and its  affiliates.  The Investors  also have agreed not to enter
into any short sales or other  hedging  activities  which  involve,  among other
things, sales of shares of Common

                                        3

<PAGE>



Stock,  during the 25 trading  days  ending  June 7, 1999 (the date on which the
Initial Fixed Price is determined).

         The Company has agreed to file the Registration  Statement on or before
January 23, 1999 and to maintain effectiveness (subject to certain penalties for
non-compliance   in  addition  to  the  penalties  set  forth  above),   of  the
Registration  Statement.  The Company has agreed to reimburse  the Investors for
their expenses in connection with their investment in the Series F Stock and the
preparation of th Registration Statement, up to a maximum of $50,000.

         The offer and sale of the Series F Stock and the common stock  issuable
upon  conversion  thereof was made pursuant to the exemption  from  registration
provided Regulation D under the Securities Act of 1933.

         The foregoing  summaries of agreements are  necessarily  incomplete and
selective,  and are qualified in their  entirety by reference to the  agreements
summarized, each of which is attached hereto as an exhibit

Item 7.  Financial Statements and Exhibits

         (c) Exhibits

Exhibit No.  Description

   3.1            Amended Certificate of Designations, Preferences and Rights of
                  Series F Convertible Preferred Stock of Immunomedics, Inc.

  10.1            Securities Purchase Agreement, dated December 9, 1998,  by and
                  among Immunomedics, Inc. and the Investors.

  10.2            Registration  Rights  Agreement by and among dated December 9,
                  1998,  by and among Immunomedics, Inc. and the Investors.

  99.1            Press Release, dated December 9, 1998.


                                        4

<PAGE>



                                   SIGNATURES


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


                                                       IMMUNOMEDICS, INC.


                                                       By:/s/ Robert J. DeLuccia
                                                       Robert J. DeLuccia
                                                       President and
                                                       Chief Executive Officer



Date:  December 15, 1998

                                        5

<PAGE>

                                     AMENDED
                    CERTIFICATE OF DESIGNATIONS, PREFERENCES
               AND RIGHTS OF SERIES F CONVERTIBLE PREFERRED STOCK
                                       OF
                               IMMUNOMEDICS, INC.

         Immunomedics,   Inc.  (the  "Company"),  a  corporation  organized  and
existing under the General Corporation Law of the State of Delaware, does hereby
certify that, pursuant to authority conferred upon the Board of Directors of the
Company by the Certificate of  Incorporation,  as amended,  of the Company,  and
pursuant to Section 151 of the General Corporation Law of the State of Delaware,
(A) on  December  7,  1998  the  Company  filed a  Certificate  of  Designation,
designating  the  preferences  and rights of the Series F Convertible  Preferred
Stock  (the  "Original  Designation"),  (B) as of the date  hereof  no shares of
preferred  stock have been issued  pursuant to the Original  Designation and (C)
the Board of Directors of the Company at a meeting duly held adopted resolutions
(i) authorizing a series of the Company's previously authorized preferred stock,
par value $.01 per share, and (ii) providing for the  designations,  preferences
and relative,  participating,  optional or other rights, and the qualifications,
limitations  or  restrictions  thereof,  of 2,000 shares of Series F Convertible
Preferred  Stock of the Company  (which  shall  amend and  restate the  Original
Designation), as follows:
                  RESOLVED, that the Company is authorized to issue 2,000 shares
         of Series F Convertible  Preferred Stock (the "Preferred Shares"),  par
         value  $.01  per  share,   which  shall  have  the  following   powers,
         designations, preferences and other special rights:

               (1) Dividends. The Preferred Shares shall not bear and dividends.

               (2) Holder's   Conversion  of  Preferred  Shares.   A  holder  of
Preferred Shares shall have the right, at such holder's  option,  to convert the
Preferred  Shares into shares of the Company's  common stock, par value $.01 per
share (the "Common Stock"), on the following terms and conditions:

                           (a)      Conversion Right.  Subject to Section  2(j),
at any time or times on or after  the  Issuance  Date (as  defined  below),  any
holder of  Preferred  Shares  shall be entitled  to convert any whole  number of
Preferred  Shares  into  fully paid and  nonassessable  shares  (rounded  to the

<PAGE>

nearest  whole share in accordance  with Section  2(h)) of Common Stock,  at the
Conversion Rate (as defined below);  provided,  however,  that in no event shall
any holder be entitled to convert  Preferred  Shares in excess of that number of
Preferred Shares which,  upon giving effect to such conversion,  would cause the
aggregate number of shares of Common Stock  beneficially owned by the holder and
its  affiliates  to exceed 4.99% of the  outstanding  shares of the Common Stock
following such conversion.  For purposes of the foregoing proviso, the aggregate
number of  shares  of Common  Stock  beneficially  owned by the  holder  and its
affiliates  shall  include the number of shares of Common  Stock  issuable  upon
conversion of the Preferred  Shares with respect to which the  determination  of
such  proviso is being  made,  but shall  exclude the number of shares of Common
Stock which would be issuable upon (i) conversion of the remaining, nonconverted
Preferred Shares  beneficially owned by the holder and its affiliates,  and (ii)
exercise or conversion of the  unexercised or  unconverted  portion of any other
securities of the Company (including,  without limitation, any warrants) subject
to a limitation on conversion or exercise analogous to the limitation  contained
herein beneficially owned by the holder and its affiliates.  Except as set forth
in the  preceding  sentence,  for  purposes  of this  Section  2(a),  beneficial
ownership shall be calculated in accordance with Section 13(d) of the Securities
Exchange Act of
1934, as amended.

                           (b)      Conversion   Rate.   The  number  of  shares
of  Common  Stock  issuable  upon  conversion  of each of the  Preferred  Shares
pursuant to Sections (2)(a) and 2(g) and Section 5 shall be determined according
to the following formula (the
"Conversion Rate"):

                                Conversion Amount
                                Conversion Price

         For purposes of this Certificate of  Designations,  the following terms
shall have the following meanings:

                                    (i)     "Conversion  Price" means,  on a per
share  basis,  as of the  Conversion  Date (as  defined  below) or other date of
determination  of the applicable  Preferred  Shares (A) the Variable  Conversion
Price (as defined  below) when the  Variable  Conversion  Price is less than the
Trigger Price (as defined below) provided, however, that prior to the date which
is the earlier of ((alpha)) 365 days after the Initial Issuance Date (as defined
below) and ((beta)) a date on which a Triggering  Event, a Major  Transaction or
the public  announcement of a pending Major  Transaction (each as defined below)
occur, if the Variable Conversion Price on a Conversion Date is greater than 90%
of the Initial Fixed Price (as defined  below) and less than the Trigger  Price,
then the Conversion  Price shall equal the Trigger Price,  (B) the Trigger Price
when the Variable Conversion Price is equal to or greater than the Trigger Price
and less than or equal to 150% of the  Trigger  Price or (C) the  Profit-Sharing
Conversion  Price (as  defined  below)  when the  Variable  Conversion  Price is
greater than 150% of the Trigger Price;

                                    (ii) "Variable  Conversion  Price" means, as
of any date of  determination,  the average of the 15 lowest  Closing Bid Prices
(as defined  below) of the Common Stock during the 45  consecutive  trading days
immediately preceding a date of determination;

                                    (iii)   "Profit-Sharing   Conversion  Price"
means, as of any date of determination,  the amount determined  according to the
following formula:

                                       -2-
<PAGE>

                        Profit-Sharing Conversion Price =
        Trigger Price + Variable Conversion Price -(1.5 x Trigger Price)
                        ________________________________________________
                                                2


                                    (iv)  "Conversion  Amount"  means,  on a per
share basis, the sum of (A) the
Additional  Amount (as defined  below),  unless the Company  has  exercised  its
option to pay such amount in cash, and (B) $10,000;

                                    (v)     "Additional Amount"  means, on a per
share  basis  the  result of the following formula:  (.04)(N/365)($10,000);

                                    (vi)   "Initial  Fixed  Price"  means,  with
respect to (A) Preferred  Shares issued on the Initial  Issuance Date (I) on any
date prior to the Fixed  Conversion  Price Trigger  Date,  $4.00 and (II) on any
Conversion Date on or after the Fixed  Conversion Price Trigger Date, the lesser
of the  average of the  Closing  Bid Prices for the Common  Stock  during the 20
consecutive  trading days  immediately  preceding (y) the Fixed Conversion Price
Trigger Date and (z) the date which is 180 days after the Initial  Issuance Date
or (B) Preferred  Shares issued after the Initial  Issuance Date, the average of
the Closing Bid Prices of the Common Stock during the five  consecutive  trading
days  immediately  preceding  the Put  Share  Notice  Date  (as  defined  in the
Securities Purchase  Agreement),  subject in each case to adjustment as provided
herein.  Notwithstanding the foregoing,  should there occur one or more Excluded
Redemption  Events (as  defined  in Section 3) which  results in a change to the
Initial Fixed Price of the Preferred  Shares as in effect  immediately  prior to
the  occurrence of such Excluded  Redemption  Events  pursuant to Section 3, the
Initial  Fixed Price shall mean the lesser of ((alpha))  the Initial Fixed Price
as defined  above and ((beta)) the Initial Fixed Price  following  such Excluded
Redemption as determined pursuant to Section 3.

                                    (vii)  "Trigger  Price"  means  125%  of the
Initial Fixed Price, as adjusted;

                                    (viii) "Fixed Conversion Price Trigger Date"
means, the earlier of (I) the
date  that  is 180  days  after  the  Initial  Issuance  Date  and  (II)  if the
stockholders  have not approved of the issuance of the Preferred  Shares and the
Conversion  Shares (as defined below) pursuant to Section 4(l) of the Securities
Purchase  Agreement  on or prior to the date which is 105 days after the Initial
Issuance Date, then the date which is 105 days after the Initial Issuance Date;

                                    (ix) "N" means the number of days from,  but
excluding, the Issuance Date
of the applicable  Preferred  Share through and including the Conversion Date or
the  Maturity  Date  for  the  Preferred  Shares  for  which  conversion  and/or
redemption is being elected, as the case may be;

                                    (x) "Issuance  Date" means,  with respect to
each Preferred Share, the date of issuance of the applicable Preferred Share;

                                      -3-
<PAGE>

                                    (xi) "Initial Issuance Date" means the first
date on which any Preferred Shares are issued by the Company;

                                    (xii)  "Business  Day"  means  any day other
than Saturday,  Sunday or other day on which commercial banks in the City of New
York are authorized or required by law to remain closed;

                                    (xiii) "Securities Purchase Agreement" means
that certain  securities  purchase agreement between the Company and the initial
holders of the Preferred Shares;

                                    (xiv) "Registration  Rights Agreement" means
that certain  registration  rights agreement between the Company and the initial
holders  of the  Preferred  Shares  relating  to the  filing  of a  registration
statement covering the resale of the Conversion Shares;

                                    (xv)  "Conversion  Shares"  means  shares of
Common Stock  issuable  upon  conversion  of Preferred  Shares and any shares of
Common  Stock  issuable  as  Registration  Delay  Payments  (as  defined  in the
Registration Rights Agreement);

                                    (xvi)  "Closing  Bid Price"  means,  for any
security as of any date,  the last  closing  bid price for such  security on The
Nasdaq   National   Market   (as   reported   by  Bloomberg  Financial   Markets
("Bloomberg")),   or,   if  The   Nasdaq  National  Market is not the  principal
trading market for such security, the average of the high and low trading prices
on such date of such  security on the principal  securities  exchange or trading
market where such security is listed or traded (as reported by Bloomberg), or if
the  foregoing do not apply,  the average of the high and low trading  prices on
such date of such  security  in the  over-the-counter  market on the  electronic
bulletin board for such security (as reported by Bloomberg).  If the Closing Bid
Price  cannot  be  calculated  for  such  security  on  such  date on any of the
foregoing  bases,  the Closing Bid Price of such  security on such date shall be
the fair market value as mutually determined by the Company and the holders of a
majority of the  outstanding  Preferred  Shares  (including for purposes of this
determination  any Preferred  Shares with respect to which the Closing Bid Price
is being  determined).  If the Company and the holders of  Preferred  Shares are
unable  to agree  upon the fair  market  value of the  Common  Stock,  then such
dispute   shall  be   resolved   pursuant  to  Section   2(f)(iii).   (All  such
determinations to be appropriately adjusted for any stock dividend,  stock split
or other similar transaction during such period);

                           (c)      Company's Option to Pay Additional Amount in
Cash.   Upon   conversion   pursuant to Sections 2(a) or 2(g)  or Section 5, the
Company shall have the right to elect to pay the  Additional  Amount in cash, in
lieu of conversion to Common Stock.  If the Company elects to pay the Additional
Amount in cash, such cash shall be paid  simultaneously with the delivery to the
holder  of  the  certificates   representing  the  Common  Stock  issuable  upon
conversion in accordance with Section 2(f) or upon the credit to the holder's or
its designees  account with the Depository  Trust Company.  In order to exercise
its right to pay any  Additional  Amount in cash,  the Company  must advise each
holder of Preferred Shares in writing (the

                                      -4-
<PAGE>

"Cash Dividend  Notice") that the Additional  Amount shall be paid in cash until
such time as the Company shall  terminate the Cash Dividend  Notice by providing
at least  five  Business  Days prior  written  notice of such  termination  (the
"Termination  Notice").  The Cash Dividend  Notice shall set forth the effective
date of the Cash  Dividend  Notice,  which date shall be at least five  Business
Days after the date the Cash  Dividend  Notice is deemed to have been  delivered
pursuant to Section 20. The  Termination  Notice shall be effective on the fifth
Business  Day  after  the date the  Termination  Notice  is  deemed to have been
delivered  pursuant to Section 20 unless a later date shall be  specified in the
Termination Notice.

                           (d)      Adjustment to Conversion  Price --  Dilution
and Other Events.  In order to prevent dilution of the rights granted under this
Certificate of Designations, the Initial Fixed Prices, the Trigger Price and the
Conversion  Price will be subject to adjustment from time to time as provided in
this Section 2(d).

                                    (i)     Adjustment  of Initial  Fixed  Price
upon  Issuance of Common  Stock. Except as provided in Section 2(d)(iv),  if and
whenever on or after the Initial Issuance Date, the Company issues or sells,  or
is  deemed  to  have  issued or sold,  any  shares  of  Common Stock (other than
Preferred  Shares or shares of Common Stock issued upon  conversion of Preferred
Shares  or  deemed  to  have been issued by the  Company in  connection  with an
Approved  Stock Plan (as defined  below) or the Excluded  Securities (as defined
below)) for a consideration per share less than a price (the "Applicable Price")
equal to a Trigger Price in effect  immediately  prior to such issuance or sale,
then  immediately  after such issue or sale,  the  Initial  Fixed  Price then in
effect, which relates to such Trigger Price, shall be reduced to an amount equal
to (a) if such  issuance  or sale or deemed  issuance or sale was for a security
which has both a Variable  Price (as defined  below) and a Set Price (as defined
below) component and the holders of the Preferred Shares either did not exercise
their  rights to  participate,  or were  excluded  from  participating,  in such
issuance or sale pursuant to Section 4(g) of the Securities  Purchase Agreement,
then the product of (A) .80 and (B) such  consideration  per share  received and
(b) if such issuance or sale or deemed issuance or sale was for a security other
than as described in the immediately  preceding  clause (a), then the product of
(y) the Initial  Fixed Price in effect  immediately  prior to such issue or sale
and (z) the  quotient  determined  by dividing (1) the sum of (I) the product of
the Applicable Price and the number of shares of Common Stock Deemed Outstanding
(as  defined  below)  immediately  prior to such  issue  or  sale,  and (II) the
consideration,  if  any,  received  by the  Company  upon  such  issue  or  sale
(excluding the consideration  received or to be received from the holders of the
Preferred Shares pursuant to the exercise of their right to participate pursuant
to Section 4(g) of the Securities Purchase Agreement), by (2) the product of (I)
the  Applicable  Price and (II) the  number of  shares  of Common  Stock  Deemed
Outstanding  immediately after such issue or sale (excluding those shares issued
or deemed to be issued to the holders of the  Preferred  Shares  pursuant to the
exercise  of  their  right  to  participate  pursuant  to  Section  4(g)  of the
Securities Purchase Agreement). For purposes of determining the adjusted Initial
Fixed Price under this Section 2(d)(i), the following shall be applicable:

                                            (A)      Issuance  of  Options.   If
          and whenever on or after the Initial Issuance Date, the Company in any
          manner  grants any rights or options to  subscribe  for or to purchase
          Common  Stock (other than the  Excluded  Securities  or pursuant to an
          Approved Stock Plan or upon conversion of the Preferred Shares) or any
          stock or other securities  convertible into or exchangeable for Common

                                      -5-
<PAGE>

          Stock (such rights or options being herein  called  "Options" and such
          convertible or  exchangeable  stock or securities  being herein called
          "Convertible  Securities")  and the price  per share for which  Common
          Stock is issuable upon the exercise of such Options or upon conversion
          or exchange of such Convertible Securities is less than the Applicable
          Price,  then the total  maximum  number  of  shares  of  Common  Stock
          issuable  upon the  exercise  of such  Options or upon  conversion  or
          exchange of the total maximum  amount of such  Convertible  Securities
          issuable  upon the exercise of such Options at the time of issuance of
          such Options (without regard to limitations on exercise, conversion or
          exchange)  shall be deemed to be  outstanding  and to have been issued
          and sold by the Company for such price per share. For purposes of this
          Section  2(d)(i)(A),  the "price per share for which  Common  Stock is
          issuable upon exercise of such Options or upon  conversion or exchange
          of such  Convertible  Securities"  is  determined  by dividing (I) the
          total  amount,  if any,  received  or  receivable  by the  Company  as
          consideration  for the  granting  of such  Options,  plus the  minimum
          aggregate  amount of additional  consideration  payable to the Company
          upon the  exercise of all such Options at the time of issuance of such
          Options  (without  regard to  limitations  on exercise,  conversion or
          exchange),   plus  in  the  case  of  such  Options  which  relate  to
          Convertible  Securities,  the minimum  aggregate  amount of additional
          consideration,  if any,  payable to the Company  upon the  issuance or
          sale of such  Convertible  Securities  and the  conversion or exchange
          thereof,  by (II) the total  maximum  number of shares of Common Stock
          issuable upon exercise of such Options at the time of issuance of such
          Options  (without  regard to  limitations  on exercise,  conversion or
          exchange) or upon the  conversion or exchange of all such  Convertible
          Securities  issuable upon the exercise of such Options.  Except as set
          forth in Section  2(d)(i)(C) below, no adjustment of the Initial Fixed
          Prices shall be made upon the actual  issuance of such Common Stock or
          of such  Convertible  Securities  upon the exercise of such Options or
          upon the actual  issuance  of such  Common  Stock upon  conversion  or
          exchange of such Convertible Securities.


                                            (B)      Issuance   of   Convertible
          Securities. If and whenever on or after the Initial Issuance Date, the
          Company in any manner issues or sells any  Convertible  Securities and
          the  price per share for  which  Common  Stock is  issuable  upon such
          conversion  or exchange is less than the  Applicable  Price,  then the
          maximum number of shares of Common Stock  issuable upon  conversion or
          exchange  of such  Convertible  Securities  at the time of issuance of
          such  Convertible   Securities   (without  regard  to  limitations  on
          exercise,  conversion or exchange)  shall be deemed to be  outstanding
          and to have been  issued  and sold by the  Company  for such price per
          share.  For the  purposes of this Section  2(d)(i)(B),  the "price per
          share for which  Common  Stock is  issuable  upon such  conversion  or
          exchange" is determined  by dividing (I) the total amount  received or
          receivable  by the Company as  consideration  for the issue or sale of
          such  Convertible  Securities,  plus the minimum  aggregate  amount of
          additional  consideration,  if any,  payable to the  Company  upon the
          conversion  or  exchange  thereof  at the  time  of  issuance  of such
          Convertible  Securities  (without  regard to  limitations on exercise,
          conversion or exchange), by (II) the total maximum number of shares of
          Common  Stock  issuable  upon the  conversion  or exchange of all such
          Convertible  Securities  at the time of issuance  of such  Convertible
          Securities  (without regard to limitations on exercise,  conversion or
          exchange).  Except  as set  forth  in  Section  2(d)(i)(C)  below,  no

                                      -6-
<PAGE>

          adjustment  of an Initial  Fixed  Prices shall be made upon the actual
          issue  of such  Common  Stock  upon  conversion  or  exchange  of such
          Convertible  Securities,  and  if any  such  issue  or  sale  of  such
          Convertible  Securities is made upon exercise of any Options for which
          adjustment  of an  Initial  Fixed  Prices  had  been or are to be made
          pursuant  to other  provisions  of this  Section  2(d)(i),  no further
          adjustment  of such  Initial  Fixed  Prices shall be made by reason of
          such issue or sale.

                                            (C)      Change   in   Option  Price
          or Rate of  Conversion.  If the  purchase  price  provided  for in any
          Options, the additional consideration, if any, payable upon the issue,
          conversion or exchange of any Convertible  Securities,  or the rate at
          which any Convertible  Securities are convertible into or exchangeable
          for Common  Stock change at any time,  the Initial  Fixed Price of any
          Preferred  Shares  in  effect  at the  time of such  change  shall  be
          readjusted  to the Initial Fixed Price which would have been in effect
          at  such  time  had  such  Options  or  Convertible  Securities  still
          outstanding  provided  for such  changed  purchase  price,  additional
          consideration  or changed  conversion rate, as the case may be, at the
          time initially  granted,  issued or sold;  provided that no adjustment
          shall be made if such  adjustment  would result in an increase of such
          Initial Fixed Price then in effect.

                                            (D)      Certain  Definitions.   For
          purposes of  determining  the adjusted  Initial Fixed Price under this
          Section  2(d)(i),  the  following  terms have the  meanings  set forth
          below:
                                                     (I)   "Approved Stock Plan"
          shall mean any  contract,  plan or agreement  which is approved by the
          Board of  Directors of the  Company,  pursuant to which the  Company's
          securities (including stock appreciation rights,  phantom stock rights
          or other rights with equity  features)  may be issued to any employee,
          officer, director, consultant or other service provider.

                                                     (II)   "Common Stock Deemed
          Outstanding"  means, at any given time, the number of shares of Common
          Stock actually  outstanding at such time, plus the number of shares of
          Common Stock deemed to be outstanding  pursuant to Sections 2(d)(i)(A)
          and 2(d)(i)(B) hereof regardless of whether the Options or Convertible
          Securities  are actually  exercisable  at such time, but excluding any
          shares of Common  Stock  issuable  upon  conversion  of the  Preferred
          Shares.

                                                     (III) "Excluded Securities"
          means any security of the Company  issued after  November 17, 1998 and
          prior to  December  31, 1998  pursuant to the terms of the  Structured
          Equity Line Flexible  Financing  Agreement,  between  Cripple Creek, a
          Delaware limited  liability company and the Company (as such agreement
          is attached to the Securities Purchase Agreement as Exhibit E).

                                                     (IV)  "Set  Price"   means,
          with respect to the  conversion,  exchange,  or exercise  price of any
          security,  a price which has the  possibility  of not varying with the
          market price of the Common Stock.

                                      -7-
<PAGE>

                                            (E)      Effect  on   Initial  Fixed
          Price of Certain  Events.  For  purposes of  determining  the adjusted
          Initial Fixed Price under this Section 2(d)(i), the following shall be
          applicable:
                                                   (I)        Calculation     of
          Consideration  Received.  If any Common Stock,  Options or Convertible
          Securities  are  issued or sold or deemed to have been  issued or sold
          for cash, the consideration received therefor will be deemed to be the
          net amount received by the Company therefor plus actual legal expenses
          incurred  pursuant to such issuance or sale of up to $50,000.  In case
          any Common Stock, Options or Convertible Securities are issued or sold
          for a consideration  other than cash, the amount of the  consideration
          other than cash received by the Company will be the fair value of such
          consideration, except where such consideration consists of securities,
          in which case the amount of consideration received by the Company will
          be the average of the Closing  Bid Prices of such  securities  for the
          five  consecutive  trading  days  immediately  preceding  the  date of
          receipt. In case any Common Stock,  Options or Convertible  Securities
          are issued to the  owners of the  non-surviving  entity in  connection
          with any merger in which the  Company  is the  surviving  entity,  the
          amount of  consideration  therefor will be deemed to be the fair value
          of such  portion of the net assets and  business of the  non-surviving
          entity as is attributable to such Common Stock, Options or Convertible
          Securities,  as the case may be. The fair  value of any  consideration
          other  than  cash or  securities  will be  determined  jointly  by the
          Company  and the holders of a majority  of the  Preferred  Shares then
          outstanding.  If such parties are unable to reach agreement within ten
          (10) days after the  occurrence of an event  requiring  valuation (the
          "Valuation Event") the Company shall use its best efforts to cause the
          fair value of such  consideration to be determined  within 48 hours of
          the tenth (10th) day following the Valuation  Event by an independent,
          reputable appraiser selected by the Company,  which appraiser shall be
          reasonably  acceptable  to  two-thirds  (_)  of  the  holders  of  the
          Preferred Shares. The determination of such appraiser shall be binding
          upon all parties absent manifest error.

                                                   (II) Integrated Transactions.
          In case any Option is issued in  connection  with the issue or sale of
          other  securities of the Company,  together  comprising one integrated
          transaction  in which no specific  consideration  is allocated to such
          Options by the parties  thereto,  the  Options  will be deemed to have
          been   issued  for  a   consideration   of  $.01  and  the   aggregate
          consideration  received by the Company in such integrated  transaction
          shall be included in the  adjustment  calculation  in Section  2(d)(i)
          above.

                                                   (III) Treasury  Shares.   The
          number of shares of Common  Stock  outstanding  at any given time does
          not include shares owned or held by or for the account of the Company,
          and the  disposition of any shares so owned or held will be considered
          an issue or sale of Common Stock.

                                                    (IV)  Record  Date.  If  the
          Company  takes a record of the holders of Common Stock for the purpose

                                      -8-
<PAGE>

          of  entitling  them (1) to  receive a dividend  or other  distribution
          payable in Common Stock, Options or in Convertible Securities,  or (2)
          to subscribe  for or purchase  Common  Stock,  Options or  Convertible
          Securities, then such record date will be deemed to be the date of the
          issue or sale of the shares of Common Stock deemed to have been issued
          or sold upon the  declaration  of such  dividend or the making of such
          other  distribution  or the  date of the  granting  of such  right  of
          subscription or purchase, as the case may be.

                                    (ii)  Adjustment of Initial Fixed Price upon
Subdivision  or  Combination  of  Common  Stock.    If  the  Company at any time
subdivides (by any stock split, stock dividend,  recapitalization  or otherwise)
one or more  classes of its  outstanding  shares of Common  Stock into a greater
number of shares,  each Initial Fixed Price in effect  immediately prior to such
subdivision will be proportionately reduced. If the Company at any time combines
(by  combination,  reverse stock split or otherwise)  one or more classes of its
outstanding shares of Common Stock into a smaller number of shares, each Initial
Fixed  Price  in  effect   immediately   prior  to  such   combination  will  be
proportionately increased.

                                    (iii)   Reorganization,    Reclassification,
Consolidation,   Merger   or   Sale.   Any   recapitalization,   reorganization,
reclassification, consolidation, merger, sale of all or substantially all of the
Company's assets to another Person (as defined below) or other transaction which
is effected in such a way that  holders of Common  Stock are entitled to receive
(either  directly or upon subsequent  liquidation)  stock,  securities or assets
with  respect  to or in  exchange  for  Common  Stock is  referred  to herein as
"Organic  Change." Prior to the consummation of any Organic Change,  the Company
will make appropriate  provision (in form and substance reasonably  satisfactory
to the holders of a majority of the Preferred Shares then outstanding) to insure
that each of the holders of the Preferred  Shares will thereafter have the right
to acquire  and  receive in lieu of or in  addition  to (as the case may be) the
shares of Common Stock  otherwise  acquirable and receivable upon the conversion
of such holder's  Preferred Shares,  such shares of stock,  securities or assets
that would have been issued or payable in such Organic Change with respect to or
in  exchange  for the  number of shares of Common  Stock  which  would have been
acquirable and receivable upon the conversion of such holder's  Preferred Shares
had such  Organic  Change not taken  place  (without  taking  into  account  any
limitations or restrictions on the timing or amount of conversions). In any such
case,  the  Company  will  make  appropriate  provision  (in form and  substance
reasonably  satisfactory  to the holders of a majority of the  Preferred  Shares
then  outstanding)  with respect to such holders' rights and interests to insure
that the  provisions  of this Section 2(d) and Section 2(e) will  thereafter  be
applicable  to the  Preferred  Shares  (including,  in  the  case  of  any  such
consolidation, merger or sale in which the successor entity or purchasing entity
is other than the Company, an immediate  adjustment of each of the Initial Fixed
Prices  to the  value  for the  Common  Stock  reflected  by the  terms  of such
consolidation,  merger  or sale,  if the  value so  reflected  is less than such
Initial Fixed Price in effect immediately prior to such consolidation, merger or
sale and an immediate  revision to the Initial Fixed Prices to reflect the price
of the common stock of the surviving  entity and the market in which such common
stock is traded). The Company will not effect any such consolidation,  merger or
sale, unless prior to the consummation  thereof,  the successor entity (if other
than  the  Company)  resulting  from  consolidation  or  merger  or  the  entity
purchasing  such assets  assumes,  by written  instrument (in form and substance
reasonably  satisfactory  to the holders of a majority of the  Preferred  Shares

                                      -9-
<PAGE>

then outstanding),  the obligation to deliver to each holder of Preferred Shares
such shares of stock,  securities or assets as, in accordance with the foregoing
provisions,  such  holder may be entitled  to  acquire.  "Person"  shall mean an
individual,  a limited  liability  company,  a partnership,  a joint venture,  a
corporation,  a trust, an  unincorporated  organization  and a government or any
department or agency thereof.

                                    (iv)    Adjustment  of  Variable  Conversion
Price  upon  Issuance  of  Convertible  Securities.  If  and  whenever after the
Issuance Date, the Company in any manner issues or sells Convertible  Securities
(other than  Excluded  Securities  or any  Convertible  Securities  issued in an
offering  with respect to which the holders of the  Preferred  Shares  purchased
Convertible  Securities  pursuant to their right to participate in such offering
pursuant  to  Section  4(g)  of the  Securities  Purchase  Agreement)  that  are
convertible  into or  exercisable  or  exchangeable  for Common Stock at a price
which may vary with the market  price of the Common Stock (the  formulation  for
such variable price being herein referred to as, the "Variable  Price") and such
Variable  Price is not  calculated  using the same formula used to calculate the
Variable  Conversion Price in effect immediately prior to the time of such issue
or sale,  the Company shall  provide  written  notice  thereof via facsimile and
overnight courier to each holder of the Preferred Shares ("Variable  Notice") on
the date of issuance of such Convertible Securities. If the holders of Preferred
Shares representing at least two-thirds of the Preferred Shares then outstanding
provide written notice via facsimile and overnight  courier (the "Variable Price
Election  Notice") to the Company  within five (5) Business  Days of receiving a
Variable  Notice that such  holders  desire to replace the  Variable  Conversion
Price then in effect with the Variable Price described in such Variable  Notice,
then from and after the date of the  Company's  receipt  of the  Variable  Price
Election Notice the Variable  Conversion  Price will  automatically  be replaced
with the Variable Price (together with such modifications to this Certificate of
Designations  as may be required to give full effect to the  substitution of the
Variable  Price  for  the  Variable   Conversion  Price),   subject  to  further
adjustments as provided in this Certificate of Designations. A holder's delivery
of a Variable Price Election Notice shall serve as the consent required to amend
this Certificate of Designations pursuant to Section 15 below. In the event that
a holder delivers a Conversion  Notice at any time after the Company's  issuance
of Convertible Securities with a Variable Price but before such holder's receipt
of the  Company's  Variable  Notice,  then such holder  shall have the option by
written  notice to the  Company  to have the  Conversion  Price be equal to such
Variable Price for the conversion  effected by such Conversion Notice,  provided
that  two-thirds  of the  preferred  shares then  outstanding  have elected such
Variable Price to replace the existing Variable Conversion Price.

                                    (v)     Certain  Events. If any event occurs
of  the  type  contemplated  by  the  provisions  of  this  Section 2(d) but not
expressly provided for by such provisions  (including,  without limitation,  the
granting of stock appreciation rights, phantom stock rights or other rights with
equity  features  other than  pursuant  to an  Approved  Stock  Plan),  then the
Company's  Board  of  Directors  will  make  an  appropriate  adjustment  in the
Conversion  Price so as to protect  the rights of the  holders of the  Preferred
Shares; provided,  however, that no such adjustment will increase the Conversion
Price as otherwise determined pursuant to this Section 2(d).

                                      -10-
<PAGE>

                                    (vi)    Adjustment  of Initial  Fixed  Price
Upon Major  Corporate Event  Announcement.  In the event (A) the Company makes a
public announcement that it intends to consolidate or merge with or into another
Person or engage in a business combination involving the issuance or exchange of
more than the Trigger Percentage (as defined below) of the Company's outstanding
Common Stock,(B) the Company makes a public announcement that it intends to sell
or transfer all or substantially  all of the Company's assets, or (C) any Person
(including the Company) publicly announces a purchase,  tender or exchange offer
for more than the Trigger  Percentage of the Company's  outstanding Common Stock
(the  transactions  described in clauses (A), (B) and (C) above are  hereinafter
referred  to as  "Major  Corporate  Events"  and the  date  of the  announcement
referred  to in  clause  (A),  (B)  or  (C) is  hereinafter  referred  to as the
"Announcement  Date"),  then the Initial Fixed Prices shall,  effective upon the
Announcement Date and continuing  through and including the Adjusted  Conversion
Price  Termination  Date (as defined  below),  be equal to the Conversion  Price
which  would  have  been  applicable  for a  conversion  by  the  holder  on the
Announcement  Date.  From and after the Adjusted  Conversion  Price  Termination
Date, the Conversion Price shall be determined as set forth in Section 2(b). For
purposes hereof,  "Adjusted  Conversion Price Termination Date" shall mean, with
respect to any proposed Major Corporate Event for which a public announcement as
contemplated  by this Section  2(c)(vi)  has been made,  the date upon which the
Company  or other  Person  (in the case of  clause  (C)  above)  consummates  or
publicly  announces  the  termination  or  abandonment  of  the  proposed  Major
Corporate Event which was the subject of the previous public  announcement.  The
"Trigger Percentage" means the lesser of (I) 50% and (II) the greater of (y) 30%
and (z) the percentage of shares  outstanding held by David M. Goldenberg or his
spouse,  their  children  and  grandchildren  or any trust which has as the sole
beneficiary any or all of the above individuals.

                                    (vii) Notices.

                                            (A) As  soon as practicable,  but in
          no event later than one (1) day after any adjustment of the Conversion
          Price,  the Company will give written notice thereof to each holder of
          the  Preferred   Shares,   setting  forth  in  reasonable  detail  and
          certifying the calculation of such adjustment.

                                            (B) The  Company  will give  written
          notice to each holder of the  Preferred  Shares at least ten (10) days
          prior to the date on which  the  Company  closes  its books or takes a
          record  (I) with  respect to any  dividend  or  distribution  upon the
          Common Stock, (II) with respect to any pro rata subscription  offer to
          holders of Common Stock, or (III) for determining  rights to vote with
          respect to any Organic  Change,  dissolution or liquidation  and in no
          event  shall such  notice be  provided  to such  holder  prior to such
          information being made known to the public.

                                            (C)  The  Company   will  also  give
          written  notice to each  holder of the  Preferred  Shares at least ten
          (10) days prior to the date on which any Organic  Change,  dissolution
          or  liquidation  will take place and in no event  shall such notice be
          provided to such holder prior to such information  being made known to
          the public.

                                      -11-
<PAGE>


                           (e)      Purchase   Rights.   In   addition   to  any
adjustments  of the  Conversion  Price  pursuant to Section 2(d), if at any time
after the Initial Issuance Date the Company grants, issues or sells any Options,
Convertible  Securities  or rights to purchase  stock,  warrants,  securities or
other  property pro rata to the record holders of any class of Common Stock (the
"Purchase Rights"), then the holders of the Preferred Shares will be entitled to
acquire,  upon the terms  applicable  to such  Purchase  Rights,  the  aggregate
Purchase  Rights which such holder  could have  acquired if such holder had held
the number of shares of Common Stock acquirable upon complete  conversion of the
Preferred Shares (without taking into account any limitations or restrictions on
the  timing or amount of  conversions)  immediately  before  the date on which a
record is taken for the grant,  issuance or sale of such Purchase Rights, or, if
no such record is taken,  the date as of which the record  holders of the Common
Stock are to be determined for the grant, issue or sale of such Purchase Rights.

                           (f)      Mechanics  of  Conversion.   Subject  to the
Company's  inability to fully satisfy its obligations  under a Conversion Notice
(as defined below) as provided for in Section 4:

                                    (i)     Holder's    Delivery   Requirements.
To convert  Preferred  Shares into full shares of Common  Stock on any date (the
"Conversion  Date"),  the holder  thereof  shall (A) transmit by  facsimile  (or
otherwise  deliver),  for receipt on or prior to 6:00 p.m. Eastern Time, on such
date,  a copy of a fully  executed  notice of  conversion  in the form  attached
hereto as Exhibit I (the  "Conversion  Notice") to the Company or its designated
transfer agent (the "Transfer Agent"), and (B) if required by Section 2(f)(vii),
surrender  to a  common  carrier,  for  delivery  to  the  Company  as  soon  as
practicable  following such date, the original  certificate(s)  representing the
Preferred Shares being converted (or an indemnification undertaking with respect
to such shares in the case of their loss, theft or destruction)  (the "Preferred
Stock  Certificate(s)").  Such holders of the  Preferred  Shares shall use their
best efforts to provide a copy of the  Conversion  Notice to Company  counsel on
the  Conversion  Date and verify by telephone  that the Company has received the
Conversion Notice on the Conversion Date, but the Company's obligations pursuant
to this Certificate of Designations and the Transaction Documents (as defined in
the Securities  Purchase Agreement)  including,  but not limited to this Section
2(f),  shall  remain  in full  force  and  effect  regardless  of such  holder's
compliance with the requirements of this sentence.

                                    (ii)    Company's Response.  Upon receipt by
the Company of a facsimile  copy of a Conversion  Notice,  the Company shall (A)
promptly,  but in no event later than 24 hours  after such  receipt,  send,  via
facsimile,  a confirmation of receipt of such  Conversion  Notice to such holder
and (B) on or before the second  Business  Day  following  the date of  receipt,
credit such aggregate number of shares of Common Stock to which the holder shall

                                     -12-
<PAGE>

be  entitled  to the  holder's  or  its  designee's  balance  account  with  The
Depository  Trust Company;  provided,  however,  if the holder who submitted the
Conversion  Notice requested  physical  delivery of any or all of the Conversion
Shares,  then the Company  shall,  on or before the third Business Day following
receipt of the  Conversion  Notice,  issue and surrender to a common carrier for
overnight  delivery  to the  address  specified  in  the  Conversion  Notice,  a
certificate,  registered  in the name of the  holder  or its  designee,  for the
number of shares of Common Stock to which the holder shall be entitled  pursuant
to such request.  If the number of Preferred Shares represented by the Preferred
Stock  Certificate(s)  submitted  for  conversion  is greater than the number of
Preferred Shares being converted, then the Company shall, as soon as practicable
and in no event  later than two  Business  Days after  receipt of the  Preferred
Stock  Certificate(s) and at its own expense,  issue and deliver to the holder a
new Preferred Stock Certificate  representing the number of Preferred Shares not
converted.
                                    (iii)   Dispute  Resolution.  In the case of
a dispute as to the  determination  of the Closing  Bid Price or the  arithmetic
calculation  of the  Conversion  Rate,  the Company shall  promptly issue to the
holder  the  number of shares of Common  Stock  that is not  disputed  and shall
submit the disputed  determinations or arithmetic calculations to the holder via
facsimile  within two (2)  Business Day of receipt of such  holder's  Conversion
Notice.   If  such  holder  and  the  Company  are  unable  to  agree  upon  the
determination  of  the  Closing  Bid  Price  or  arithmetic  calculation  of the
Conversion  Rate within one (1) Business Day of such disputed  determination  or
arithmetic  calculation  being  submitted to the holder,  then the Company shall
within one (1) Business Day submit via facsimile (A) the disputed  determination
of the Closing Bid Price to an independent,  reputable  investment  bank, or (B)
the disputed  arithmetic  calculation of the Conversion Rate to its independent,
outside  accountant.  The  Company  shall  use its best  efforts  to  cause  the
investment  bank  or  the  accountant,  as the  case  may  be,  to  perform  the
determinations  or  calculations  and notify the  Company  and the holder of the
results no later than  forty-eight  (48)  hours  from the time it  receives  the
disputed determinations or calculations.  Such investment bank's or accountant's
determination  or  calculation,  as the case may be,  shall be binding  upon all
parties absent manifest error.

                                    (iv)   Record Holder.  The person or persons
entitled to receive the shares of Common Stock  issuable  upon a  conversion  of
Preferred  Shares  shall be treated  for all  purposes  as the record  holder or
holders of such shares of Common Stock on the Conversion Date.

                                    (v)    Company's Failure to Timely  Convert.
If within five  Business  Days after the  Company's or the Transfer  Agent's (as
applicable)  receipt of a facsimile  copy of a  Conversion  Notice,  the Company
shall fail to issue a  certificate  for the number of shares of Common  Stock to
which a holder is entitled or to credit the  holder's  balance  account with The
Depository  Trust Company for such number of shares of Common Stock to which the
holder is  entitled  upon such  holder's  conversion  of the  Preferred  Shares,
pursuant to Section 2(f)(ii),  in addition to all other available remedies which
such holder may pursue  hereunder and under the  Securities  Purchase  Agreement
(including indemnification pursuant to Section 8 thereof), the Company shall pay
additional  damages to such holder on each date after such fifth (5th)  Business
Day that such  conversion  is not timely  effected in an amount equal to 0.5% of
the product of (A) the sum of the number of shares of Common Stock not issued to
the holder on a timely  basis  pursuant  to Section  2(f)(ii)  and to which such
holder is entitled and (B) the Closing Bid Price of the Common Stock on the last
possible  date which the Company  could have  issued  such Common  Stock to such
holder without violating Section 2(f)(ii).

                                      -13-
<PAGE>


                                    (vi)   Company's     Failure    to     Issue
Certificates.  If within ten Business  Days after the  Company's  receipt of the
Preferred  Stock  Certificates  to be converted  and the  Conversion  Notice the
Company shall fail to issue a new Preferred Stock  Certificate  representing the
number of Preferred Shares to which such holder is entitled, pursuant to Section
2(f)(ii),  in addition  to all other  available  remedies  which such holder may
pursue  hereunder  and  under  the  Securities  Purchase  Agreement   (including
indemnification pursuant to Section 8 thereof), the Company shall pay additional
damages to such holder on each date after such tenth  (10th)  Business  Day that
such delivery of such Preferred Stock  Certificates is not timely effected in an
amount  equal to 0.5% of the product of (A) the number of shares of Common Stock
issuable upon conversion of the Preferred  Shares  represented by such Preferred
Stock  Certificate  as of the last  possible  date which the Company  could have
issued such Preferred Stock Certificate to such holder without violating Section
2(f)(ii) and (B) the Closing Bid Price of the Common Stock on the last  possible
date which the Company could have issued such  Preferred  Stock  Certificate  to
such holder without violating Section 2(f)(ii).

                                      -14-
<PAGE>


                                    (vii)  Book-Entry.  Notwithstanding anything
to the  contrary  set forth  herein,  upon  conversion  of  Preferred  Shares in
accordance  with the terms hereof,  the holder  thereof shall not be required to
physically  surrender the certificate  representing  the Preferred Shares to the
Company  unless  the  full  number  of  Preferred  Shares   represented  by  the
certificate  are being  converted.  The holder and the  Company  shall  maintain
records  showing the number of Preferred  Shares so  converted  and the dates of
such conversions or shall use such other method,  reasonably satisfactory to the
holder  and  the  Company,  so as  not  to  require  physical  surrender  of the
certificate representing the Preferred Shares upon each such conversion.  In the
event of any  dispute  or  discrepancy,  such  records of the  Company  shall be
controlling and determinative in the absence of manifest error.  Notwithstanding
the foregoing, if Preferred Shares represented by a certificate are converted as
aforesaid,  the  holder  may  not  transfer  the  certificate  representing  the
Preferred Shares unless the holder first  physically  surrenders the certificate
representing  the  Preferred  Shares to the Company,  whereupon the Company will
forthwith  issue and deliver upon the order of the holder a new  certificate  of
like tenor, registered as the holder may request,  representing in the aggregate
the remaining number of Preferred Shares  represented by such  certificate.  The
holder and any assignee,  by acceptance of a certificate,  acknowledge and agree
that, by reason of the provisions of this paragraph, following conversion of any
Preferred Shares, the number of Preferred Shares represented by such certificate
may be less than the number of Preferred Shares stated of the face thereof. Each
certificate for Preferred Shares shall bear the following legend:

                  ANY TRANSFEREE OF THIS CERTIFICATE SHOULD CAREFULLY REVIEW THE
                  TERMS   OF  THE   COMPANY'S   CERTIFICATE   OF   DESIGNATIONS,
                  PREFERENCES AND RIGHTS OF THE PREFERRED SHARES  REPRESENTED BY
                  THIS CERTIFICATE,  INCLUDING SECTION  2(f)(vii)  THEREOF.  THE
                  NUMBER OF PREFERRED SHARES REPRESENTED BY THIS CERTIFICATE MAY
                  BE LESS THAN THE NUMBER OF PREFERRED SHARES STATED ON THE FACE
                  HEREOF  PURSUANT TO SECTION  2(f)(vii) OF THE  CERTIFICATE  OF
                  DESIGNATIONS, PREFERENCES AND RIGHTS.

                           (g)      Mandatory   Conversion.   If  any  Preferred
Shares remain outstanding on the Maturity Date (as defined below), then all such
Preferred  Shares  shall be converted  as of such date in  accordance  with this
Section 2 as if the holders of such  Preferred  Shares had given the  Conversion
Notice on the Maturity Date; provided,  however,  that if a Triggering Event has
occurred and is continuing on the Maturity Date, then the Company shall,  within
five Business Days  following  the Maturity Date (unless  otherwise  notified in
writing by the holder of such  holder's  request  to have the  Preferred  Shares
converted  into  Common  Stock),  pay to each  holder of  Preferred  Shares then
outstanding,  in immediately  available funds, an amount equal to the Triggering
Event  Redemption  Price. All holders of Preferred Shares shall, on the Maturity
Date,   surrender  all   Preferred   Stock   Certificates,   duly  endorsed  for
cancellation,  to the Company,  provided  that the Company has complied with its
obligations under this Section 2(g) and 2(f).  Notwithstanding the foregoing, if

                                      -15-
<PAGE>

the Common Stock is not designated for quotation on The Nasdaq  National  Market
or listed on The New York Stock Exchange, Inc. but such events do not constitute
a Triggering  Event,  then the Maturity Date shall be extended  until the Common
Stock is so designated or listed.  "Maturity  Date" means the date which is five
years after the applicable Issuance Date unless extended (i) as described in the
immediately   preceding   sentence,   (ii)  pursuant  to  Section  3(v)  of  the
Registration Rights Agreement, which extension shall equal two (2) days for each
day of any Grace Period (as defined in the  Registration  Rights  Agreement)  or
(iii)  pursuant to Section  4(n) of the  Securities  Purchase  Agreement,  which
extension  shall  equal  two (2) days for each day of any  Underwriting  Back-Up
Period (as defined in the Securities Purchase Agreement).

                           (h)      Fractional  Shares.  The  Company  shall not
issue any fraction of a share of Common Stock upon any conversion. All shares of
Common Stock (including fractions thereof) issuable upon conversion of more than
one Preferred  Share by a holder  thereof  shall be  aggregated  for purposes of
determining whether the conversion would result in the issuance of a fraction of
a share of Common Stock. If, after the aforementioned aggregation,  the issuance
would  result in the  issuance  of a fraction  of a share of Common  Stock,  the
Company  shall round such  fraction of a share of Common Stock up or down to the
nearest whole share.

                           (i)      Taxes.  The  Company  shall  pay any and all
taxes which may be imposed  upon it with respect to the issuance and delivery of
shares of Common Stock upon the conversion of the Preferred Shares.

                           (j)      Conversion  Restrictions.   The  right  of a
holder of Preferred Shares to convert  Preferred Shares pursuant to this Section
2 shall be limited as set forth below. Without the prior consent of the Company,
a holder of Preferred  Shares shall not be entitled to (i) convert any Preferred
Shares during the period  beginning on and  including the Initial  Issuance Date
and ending on and  including  the Fixed  Conversion  Price Trigger Date and (ii)
with respect to the Preferred  Shares issued on the Initial Issuance Date (a) if
the Initial  Fixed Price of such  Preferred  Shares is greater  than or equal to
$4.00   (subject  to   adjustment   for  any  stock   split,   stock   dividend,
recapitalization or other equitable  adjustment),  convert more than 25% of such
Preferred Shares issued to such holder, during any calendar month (starting with
the first  calendar  month which ends after the Fixed  Conversion  Price Trigger
Date), at a Conversion Price less than 90% of such Initial Fixed Price or (b) if
the Initial Fixed Price of such Preferred  Shares is less than $4.00 (subject to
adjustment  for any  stock  split,  stock  dividend,  recapitalization  or other
equitable adjustment),  convert more than 33% of such Preferred Shares issued to
such holder,  during any calendar month  (starting with the first calendar month
which ends after the Fixed Conversion Price Trigger Date), at a Conversion Price
less than 90% of such Initial Fixed Price or (iii) if the Initial Fixed Price is
equal to or greater than $4.00,  then the holders of the Preferred  Shares shall
not convert the Preferred Shares at a Conversion Price which is less than 50% of
the  Initial  Fixed  Price  unless the  Closing  Bid Price for any  twenty  (20)
consecutive day period is less than 50% of the Initial Fixed Price; provided the
number of  Preferred  Shares  permitted  to be  converted  each  calendar  month
pursuant to (i) and (ii) above shall be cumulative in that any shares  permitted
to be converted in any calendar month and not so converted shall be carried over
into  successive  calendar  months  until  so  converted.   Notwithstanding  the
foregoing,  the conversion restrictions set forth in this Section 2(j) shall not
apply (A) on and after any date on which the  Common  Stock is not listed on The
Nasdaq  National  Market  or The New  York  Stock  Exchange,  Inc.  or has  been

                                      -16-
<PAGE>

suspended from trading (excluding suspensions of not more than one day resulting
from business announcements),  or any such delisting or suspension is threatened
or pending (including, without limitation, the Company is not in compliance with
published listing  requirements),  (B) on or after any date on which there shall
have occurred an event  constituting a Major  Transaction (as defined in Section
3(c)),  Triggering  Event (as  defined  in Section  3(d)) or a Material  Adverse
Change (as  defined  below),  (C) on or after any date on which there shall have
been an announcement of a pending Major Transaction, (D) on or after any date on
which  the  Company  issues  or sells or is  deemed  to have  issued or sold (I)
securities  which result in a reduction of any Initial  Fixed Price  pursuant to
Section 2(d)(i) or (II)  Convertible  Securities  that are  convertible  into or
exercisable or  exchangeable  for Common Stock at a Variable Price, or (E) on or
after the date the Company  delivers a Lock-Up Request Notice (as defined in the
Securities Purchase Agreement), a Notice of Conversion at Company's Election (as
defined  in Section  5) or a Notice of  Redemption  at  Company's  Election  (as
defined in Section 7). "Material Adverse Change" means any change, event, result
or happening not in the normal  course of the  Company's  business or operations
involving,  directly  or  indirectly,  the  Company  or any of its  subsidiaries
resulting in a material adverse effect on the business,  financial  condition or
results of operations of the Company and its subsidiaries, taken as a whole.

                           (k)       Adjustment   of   Conversion   Restrictions
upon  Issuance  of  Convertible  Securities.  Except as provided  below,  if the
Company  in  any  manner  issues  or  sells  Convertible   Securities  that  are
convertible into Common Stock (other than Excluded Securities or any Convertible
Securities  issued in an  offering  with  respect  to which the  holders  of the
Preferred Shares  purchased  Convertible  Securities  pursuant to their right to
participate in such offering pursuant to Section 4(g) of the Securities Purchase
Agreement) and are subject to (i)  restrictions on the amount of shares that can
be  converted,  or (ii) no  restrictions  on the  amount of  shares  that can be
converted (the  restriction on conversions or lack thereof being herein referred
to as the  "Conversion  Restriction"),  and such  Conversion  Restriction is not
formulated  using the same time periods and  percentages  used in Section  2(j),
then the  Company  shall  provide  written  notice  thereof  via  facsimile  and
overnight   courier  to  each  holder  of  the  Preferred  Shares   ("Conversion
Restriction Notice") on the date of issuance of such Convertible Securities.  If
the  holders  of  Preferred  Shares  representing  at  least  two-thirds  of the
Preferred  Shares then  outstanding  which remain subject to the restrictions in
Section 2(j) provide  written  notice via facsimile  and overnight  courier (the
"Conversion  Restriction  Election  Notice")  to the  Company  within  five  (5)
Business  Days of  receiving a Conversion  Restriction  Notice that such holders
desire to replace the conversion  restrictions set forth in Section 2(j) then in
effect with the Conversion  Restriction described in such Conversion Restriction
Notice,  then from and after the date of the Company's receipt of the Conversion
  Restriction Election Notice the conversion restrictions set forth in Section
2(j) automatically will be replaced with the Conversion  Restrictions  (together
with such  modifications  to this Certificate of Designations as may be required
to give full effect to the  substitution of the Conversion  Restrictions for the
conversion restrictions set forth in Section 2(j)).

                  (3)      Redemption at Option of Holders.

                           (a)      Redemption  Option  Upon Major  Transaction.
In addition to all other  rights of the holders of  Preferred  Shares  contained
herein,  simultaneous  with or after the occurrence of a Major  Transaction  (as

                                      -17-
<PAGE>

defined  below),  each holder of Preferred  Shares shall have the right, at such
holder's  option,  to  require  the  Company  to redeem all or a portion of such
holder's Preferred Shares at a price per Preferred Share equal to the greater of
(i) 125% of the  Liquidation  Value (as  defined  in Section  11);  and (ii) the
product of (A) the  Conversion  Rate at such time, and (B) the Closing Bid Price
on the date of the public  announcement  of such Major  Transaction  or the next
date on which the exchange or market on which the Common Stock is traded is open
if such public  announcement is made (X) after 12:00 p.m.  Eastern Time, on such
date or (Y) on a date on which the  exchange or market on which the Common Stock
is traded is closed (the "Major Transaction Redemption Price").

                           (b)      Redemption  Option  Upon  Triggering  Event.
In addition to all other  rights of the holders of  Preferred  Shares  contained
herein,  simultaneous  with or after the  occurrence  of a Triggering  Event (as
defined  below),  each holder of Preferred  Shares shall have the right, at such
holder's  option,  to  require  the  Company  to redeem all or a portion of such
holder's Preferred Shares at a price per Preferred Share equal to the greater of
(i) 125% of the  Liquidation  Value;  and (ii) the product of (A) the Conversion
Rate at such  time,  and (B) the  greater  of (I) the  Closing  Bid Price on the
trading day immediately  preceding such Triggering Event or (II) the Closing Bid
Price  on the date of the  holder's  delivery  to the  Company  of a  Notice  of
Redemption at Option of Buyer Upon  Triggering  Event (as defined  below) or, if
such date of delivery is not a trading  day, the next date on which the exchange
or market on which the  Common  Stock is traded is open (the  "Triggering  Event
Redemption Price" and, collectively with the Major Transaction Redemption Price,
the "Redemption Price").

                           (c)      "Major Transaction". Subject to the Excluded
Redemption  Events  (as  defined  below)  pursuant  to  Section  3(h),  a "Major
Transaction"  shall  be  deemed  to have  occurred  at  such  time as any of the
following events:
                                    (i)     the consolidation, merger  or  other
business  combination of the Company with or into another Person (other than (A)
a  consolidation,  merger or other business  combination in which holders of the
Company's voting power immediately  prior to the transaction  continue after the
transaction to hold,  directly or indirectly,  the voting power of the surviving
entity or entities  necessary to elect a majority of the members of the board of
directors (or their  equivalent if other than a  corporation)  of such entity or
entities,  or (B) pursuant to a migratory merger effected solely for the purpose
of changing  the  jurisdiction  of  incorporation  of the Company) (a "Change of
Control Transaction");
                                    (ii)     the  sale or  transfer  of  all  or
substantially  all of the  Company's assets; or

                                    (iii)    a  purchase,   tender  or  exchange
offer  made to and  accepted  by the holders of more than the Trigger Percentage
of the outstanding shares of Common Stock.

                           (d)      "Triggering   Event".     Subject   to   the
Excluded  Redemption Events pursuant to Section 3(h), a "Triggering Event" shall
be deemed to have occurred at such time as any of the following events:

                                      -18-
<PAGE>

                                    (i)     the  failure  of  the   Registration
Statement  (as  defined in the  Registration  Rights  Agreement)  to be declared
effective  by the SEC on or prior to the date that is 150 days after the Initial
Issuance Date;

                                    (ii)    while  the   Registration  Statement
is required to be maintained effective pursuant to the terms of the Registration
Rights  Agreement,  except for any  Allowable  Grace  Period (as  defined in the
Registration Rights Agreement),  the effectiveness of the Registration Statement
lapses for any reason  (including,  without  limitation,  the issuance of a stop
order) or is unavailable  to the holder of the Preferred  Shares for sale of the
Registrable  Securities  (as defined in the  Registration  Rights  Agreement) in
accordance with the terms of the Registration  Rights Agreement,  and such lapse
or unavailability continues for a period of ten consecutive trading days;

                                    (iii)   suspension from listing or delisting
of the  Common  Stock  from The  Nasdaq  National  Market or The New York  Stock
Exchange, Inc. for a period of five consecutive days;

                                    (iv)    the  Company's  notice to any holder
of Preferred Shares,  including by way of public  announcement,  at any time, of
its intention not to comply with proper requests for conversion of any Preferred
Shares  into  shares of Common  Stock,  including  due to any of the reasons set
forth in Section 4(a) below;

                                    (v)     the  Company  shall  have  failed to
make any Excluded  Redemption Event Daily Payment (as defined below) in a timely
manner in accordance  with Section 3(i) or the Company shall have failed to give
an Excluded  Redemption Option Election Notice (as defined below) within one (1)
day of receipt of the  Holders'  Excluded  Redemption  Event  Notice (as defined
below); or

                                    (vi)    the     Company     breaches     any
representation,  warranty, covenant or other term or condition of the Securities
Purchase  Agreement,  the  Registration  Rights  Agreement,  this Certificate of
Designations or any other agreement,  document,  certificate or other instrument
delivered in connection with the  transactions  contemplated  thereby or hereby,
except to the extent that such breach would not have a Material  Adverse  Effect
(as defined in Section 3(a) of the Securities Purchase Agreement) and except, in
the  case of a  breach  of a  covenant  which is  curable,  only if such  breach
continues for a period of at least ten days.

                           (e)      Mechanics  of  Redemption at Option of Buyer
Upon Major  Transaction.  No sooner than 15 days nor later than 10 days prior to
the  consummation  of  a  Major  Transaction,   but  not  prior  to  the  public
announcement of such Major Transaction, the Company shall deliver written notice
thereof via facsimile and overnight courier (a "Notice of Major Transaction") to
each holder of Preferred  Shares.  At any time during the period beginning after
receipt  of a Notice of Major  Transaction  (or,  in the event a Notice of Major
Transaction is not delivered at least 10 days prior to a Major  Transaction,  at
any time on or after the date which is 10 days prior to a Major Transaction) and
ending on the date of such Major Transaction, any holder of the Preferred Shares
then  outstanding  may  require  the  Company  to redeem all or a portion of the

                                      -19-
<PAGE>

holder's  Preferred Shares then outstanding by delivering written notice thereof
via facsimile and overnight  courier (a "Notice of Redemption at Option of Buyer
Upon Major Transaction") to the Company, which Notice of Redemption at Option of
Buyer Upon Major  Transaction  shall indicate (i) the number of Preferred Shares
that such holder is submitting for  redemption,  and (ii) the  applicable  Major
Transaction Redemption Price, as calculated pursuant to Section 3(a).

                           (f)      Mechanics  of  Redemption at Option of Buyer
Upon Triggering  Event.  Within one (1) day after the occurrence of a Triggering
Event,  the Company  shall  deliver  written  notice  thereof via  facsimile and
overnight  courier (a "Notice of Triggering  Event") to each holder of Preferred
Shares.  At any time during the period beginning after the earlier of a holder's
receipt of a Notice of  Triggering  Event and such  holder  becoming  aware of a
Triggering  Event and  ending  on the date  which is  thirty  (30) days  after a
holder's receipt of a Notice of Triggering Event, any holder of Preferred Shares
then  outstanding  may  require  the  Company  to redeem all or a portion of the
holder's  Preferred Shares then outstanding by delivering written notice thereof
via facsimile and overnight  courier (a "Notice of Redemption at Option of Buyer
Upon Triggering Event") to the Company,  which Notice of Redemption at Option of
Buyer Upon  Triggering  Event shall indicate (i) the number of Preferred  Shares
that  such  holder  is  submitting  for  redemption,  and  (ii)  the  applicable
Triggering Event Redemption Price, as calculated pursuant to Section 3(b).

                           (g)      Payment   of   Redemption   Price.  Upon the
Company's  receipt  of a  Notice(s)  of  Redemption  at  Option  of  Buyer  Upon
Triggering  Event or a  Notice(s)  of  Redemption  at Option of Buyer Upon Major
Transaction from any holder of Preferred Shares, the Company shall promptly, but
in no event later than one (1) day following such receipt, notify each holder of
Preferred  Shares by facsimile  of the  Company's  receipt of such  Notice(s) of
Redemption at Option of Buyer Upon  Triggering  Event or Notice(s) of Redemption
at Option of Buyer Upon Major  Transaction and each holder which has sent such a
notice shall promptly submit, if required by Section(2)(f)(vii),  to the Company
or its Transfer  Agent such holder's  Preferred  Stock  Certificates  which such
holder has elected to have  redeemed.  The Company shall deliver the  applicable
Triggering  Event  Redemption  Price,  in the case of a  redemption  pursuant to
Section  3(f),  to such holder within five (5) Business Days after the Company's
receipt of a Notice of Redemption at Option of Buyer Upon Triggering  Event and,
in the case of a redemption  pursuant to Section 3(e), the Company shall deliver
the  applicable  Major  Transaction   Redemption  Price  simultaneous  with  the
consummation  of the Major  Transaction;  provided  that, if required by Section
2(f)(vii),  a holder's Preferred Stock Certificates shall have been so delivered
to the Company;  provided further that if the Company is unable to redeem all of
the  Preferred  Shares to be redeemed,  the Company  shall redeem an amount from
each holder of Preferred  Shares being redeemed equal to such holder's  pro-rata
amount (based on the number of Preferred  Shares held by such holder relative to
the number of  Preferred  Shares  outstanding)  of all  Preferred  Shares  being
redeemed.  If the  Company  shall  fail to redeem  all of the  Preferred  Shares
submitted for redemption  (other than pursuant to a dispute as to the arithmetic
calculation of the Redemption  Price),  in addition to any remedy such holder of
Preferred Shares may have under this Certificate of Designation,  the Securities
Purchase  Agreement  and  the  Registration  Rights  Agreement,  the  applicable
Redemption  Price payable in respect of such unredeemed  Preferred  Shares shall
bear interest at the rate of 1.5% per month  (prorated for partial months) until

                                      -20-
<PAGE>

paid in full. Until the Company pays such unpaid applicable  Redemption Price in
full to a holder of Preferred Shares submitted for redemption, such holder shall
have  the  option  (the  "Void  Optional  Redemption  Option")  to,  in  lieu of
redemption,  require the Company to promptly return to such holder(s) all of the
Preferred Shares that were submitted for redemption by such holder(s) under this
Section 3 and for which the  applicable  Redemption  Price has not been paid, by
sending  written notice thereof to the Company via facsimile (the "Void Optional
Redemption Notice"). Upon the Company's receipt of such Void Optional Redemption
Notice(s)  prior to  payment  of the full  applicable  Redemption  Price to such
holder, (i) the Notice(s) of Redemption at Option of Buyer Upon Triggering Event
or the Notice(s) of Redemption at Option of Buyer Upon Major Transaction, as the
case may be,  shall be null and void  with  respect  to those  Preferred  Shares
submitted for redemption and for which the applicable  Redemption  Price has not
been paid, (ii) the Company shall  promptly,  but in no event later than one (1)
day following such receipt, return any Preferred Shares submitted to the Company
by each  holder  for  redemption  under  this  Section  3(g) and for  which  the
applicable  Redemption Price has not been paid and (iii) the Initial Fixed Price
of such  returned  Preferred  Shares  shall be adjusted to the lesser of (A) the
Initial  Fixed  Price  as in  effect  on the date on  which  the  Void  Optional
Redemption  Notice(s) is delivered to the Company and (B) the lowest Closing Bid
Price  during  the  period  beginning  on the date on  which  the  Notice(s)  of
Redemption  of  Option of Buyer  Upon  Major  Transaction  or the  Notice(s)  of
Redemption  at Option of Buyer  Upon  Triggering  event,  as the case may be, is
delivered  to the  Company  and  ending on the date on which  the Void  Optional
Redemption  Notice(s) is delivered to the Company;  provided  that no adjustment
shall be made if such  adjustment  would  result in an  increase  of the Initial
Fixed Price then in effect.  Notwithstanding  the  foregoing,  in the event of a
dispute  as to the  determination  of the  Closing  Bid Price or the  arithmetic
calculation of the Redemption  Price, such dispute shall be resolved pursuant to
Section  2(f)(iii) above with the term "Redemption  Price" being substituted for
the term "Conversion  Rate". A holder's  delivery of a Void Optional  Redemption
Notice and  exercise of its rights  following  such notice  shall not effect the
Company's  obligations to make any payments which have accrued prior to the date
of such notice.  Payments  provided for in this Section 3 shall have priority to
payments to other stockholders in connection with a Major Transaction.

                           (h)     Events Excluded from  Redemption  Provisions.
Notwithstanding anything to the contrary set forth in Section 3, Section 4(a)(I)
or Section 4(a)(II), the following events shall be excluded from the definitions
of Major Transaction and Triggering Event (individually, an "Excluded Redemption
Event" and, collectively, the "Excluded Redemption Events"):

                                    (i)     the   failure  of   the Registration
Statement  to be declared  effective  by the SEC on or prior to the date that is
150 days after the Initial Issuance Date, provided that the Company has used its
best efforts to have such Registration Statement declared effective by the SEC;

                                    (ii)    while  the  Registration   Statement
is required to be maintained effective pursuant to the terms of the Registration
Rights  Agreement,  except for any Allowable Grace Period,  the effectiveness of
the Registration Statement lapses for any reason (including, without limitation,

                                      -21-
<PAGE>

the issuance of a stop order) or is  unavailable  to the holder of the Preferred
Shares for sale of the  Registrable  Securities in accordance  with the terms of
the Registration  Rights Agreement,  and such lapse or unavailability  continues
for a period of ten consecutive trading days, provided that the Company has used
its best efforts to maintain the  effectiveness of such  Registration  Statement
and has not taken  voluntary  action or  voluntarily  failed to take any  action
which has directly or indirectly  caused the Registration  Statement to lapse or
become  unavailable for the sale of all the Registrable  Securities  pursuant to
the terms of the Registration Rights Agreement;

                                    (iii)   suspension from listing or delisting
of the  Common  Stock  from The  Nasdaq  National  Market or The New York  Stock
Exchange,  Inc. for a period of five or more consecutive days, provided that the
Company  (A) has used its best  efforts to  maintain  the  listing of the Common
Stock on such exchange and has not taken any voluntary action or has voluntarily
failed to take any action  which has  resulted  in the  delisting  of the Common
Stock or the suspension of the Common Stock from trading or (B) has  voluntarily
delisted or suspended trading of the Common Stock because either (I) the holders
of the Preferred  Shares have exercised  their rights under Section 4(e) to have
the Common Stock  delisted or (II) the Company is not  permitted to issue shares
of  Common  Stock  to a holder  of  Preferred  Shares  upon  conversion  of such
Preferred  Shares due to the  Exchange  Cap and the  Company  delists the Common
Stock so that the Exchange Cap limitations no longer apply; and

                                    (iv)    a purchase, tender or exchange offer
made to and accepted by the holders of more than the Trigger  Percentage  of the
outstanding  shares of Common Stock which is not approved or  recommended by the
Company's Board of Directors or a proxy or consent  solicitation  (other than by
or on behalf of the Company)  which  results in a Change of Control  Transaction
where such proxy or consent  solicitation  is not approved or recommended by the
Company's Board of Directors.

As soon as  practicable  but in no  event  later  than  one  (1) day  after  the
occurrence of an Excluded  Redemption  Event,  the Company shall deliver written
notice  thereof via  facsimile  and  overnight  courier (a  "Company's  Excluded
Redemption Event Notice") to each holder of Preferred Shares. At any time during
the period  beginning  after the earlier of the holders'  receipt of a Company's
Excluded  Redemption Event Notice and such holders becoming aware of an Excluded
Redemption  Event and  ending on the date  which is thirty  (30) days  after the
holders' receipt of a Company's Excluded Redemption Event Notice, the holders of
at least  two-thirds of the Preferred  Shares then  outstanding  may require the
Company to satisfy its  obligations  under  Section 3(i) by  delivering  written
notice  thereof  via  facsimile  and  overnight  courier (a  "Holders'  Excluded
Redemption  Event Notice") to the Company.  The Company shall within one (1) day
of its receipt of the Holders'  Excluded  Redemption  Event Notice  provide each
holder with written  notice via  facsimile  and  overnight  courier (a "Excluded
Redemption  Option Election Notice") which notice shall specify the option which
the Company has elected to exercise  pursuant to and in accordance  with Section
3(i).

                           (i)       Rights  of  the  Holders  of the  Preferred
Shares upon the Occurrence of an Excluded  Redemption  Event. In addition to any

                                      -22-
<PAGE>

other remedies the holders of the Preferred Shares may have at law or in equity,
if an Excluded  Redemption  Event occurs and the holders of the Preferred Shares
have provided the Company with a Holders' Excluded Redemption Event Notice, then
the  Company,  at its option,  shall  either (A) pay to each holder of Preferred
Shares  the  Trigger  Event  Redemption  Price  for  each  outstanding  share of
Preferred  Stock held by such holder  pursuant to and in accordance with Section
3(g) or (B) if:

                                    (i)     the  Excluded  Redemption  Event  is
pursuant to Section  3(h)(i),  then (I) beginning on and including the first day
following  the receipt by the Company of a Holders'  Excluded  Redemption  Event
Notice,  the Company  shall pay to each holder of  Preferred  Shares an Excluded
Redemption Event Daily Payment (as defined below) on each day that such Excluded
Redemption Event  continues,  provided,  however,  that the Company shall not be
obligated to make an Excluded  Redemption  Event Daily  Payment for more than 15
days in any 365 day period and (II)  immediately  upon the occurrence of such an
Excluded  Redemption  Event (and from time to time as  applicable),  the Initial
Fixed Price of the Preferred Shares shall be adjusted to equal the lesser of (y)
the Initial Fixed Price in effect for such Preferred Shares on the date which is
150 days after the Initial  Issuance  Date or (z) the product of  ((alpha))  the
Payment  Limitation  Reduction  Percentage  (as  defined  below)  multiplied  by
((beta)) .80 multiplied by ((gamma)) the lowest Variable Conversion Price during
the  period  beginning  on and  including  the date  which is 150 days after the
Initial  Issuance  Date and ending on and  including  the date the  Registration
Statement is declared effective by the SEC;

                                    (ii)    the  Excluded  Redemption  Event  is
pursuant to Section 3(h)(ii),  then (I) beginning on and including the first day
following  the receipt by the Company of a Holders'  Excluded  Redemption  Event
Notice,  the Company  shall pay to each holder of  Preferred  Shares an Excluded
Redemption  Event Daily Payment on each day that such Excluded  Redemption Event
continues, provided, however, that the Company shall not be obligated to make an
Excluded  Redemption  Event  Daily  Payment for more than 15 days in any 365 day
period and (II) immediately  upon the occurrence of such an Excluded  Redemption
Event (and from time to time as  applicable),  the  Initial  Fixed  Price of the
Preferred  Shares shall be adjusted to equal the lesser of (y) the Initial Fixed
Price in effect for such Preferred Shares on the date of the initial  occurrence
of the Excluded  Redemption Event (the "Occurrence  Date") or (z) the product of
((alpha)) the Payment Limitation Reduction Percentage multiplied by ((beta)) .80
multiplied by ((gamma)) the lowest Variable  Conversion  Price during the period
beginning on and including the  Occurrence  Date and ending on and including the
date that the Company cures such Excluded Redemption Event;

                                    (iii)   the  Excluded  Redemption  Event  is
pursuant to Section  3(h)(iii),  then  beginning on and  including the first day
following  the receipt by the Company of a Holders'  Excluded  Redemption  Event
Notice,  the Company  shall pay to each holder of  Preferred  Shares an Excluded
Redemption  Event Daily Payment on each day that such Excluded  Redemption Event
continues, provided, however, that the Company shall not be obligated to make an
Excluded  Redemption  Event  Daily  Payment for more than 15 days in any 365 day
period, and further provided, the Company may elect, in lieu of the forgoing, by
providing  each holder of Preferred  Shares with written  notice of its election
pursuant to this  Section  3(i)(iii)  via  facsimile on the  Occurrence  Date to
adjust the Initial Fixed Price of the Preferred  Shares,  effective  immediately
upon the occurrence of such Excluded  Redemption Event (and from time to time as
applicable), to equal the product of (y) .80 multiplied by (z) 85% of the lesser

                                      -23-
<PAGE>

of (A) the  Initial  Fixed  Price of the  Preferred  Shares  as in effect on the
Occurrence Date and (B) the lowest Variable  Conversion  Price during the period
beginning on and  including the  Occurrence  Date and ending on the 45th trading
day following the Occurrence Date (provided that such 45 trading day period will
be extended  by one trading day for each day on which there is no closing  sales
price or closing  trade  price  reported  by  Bloomberg  or no bid prices of any
market  makers  reported by the  National  Quotation  Bureau,  Inc. in the "pink
sheets" for the Company's securities);

                                    (iv)    the  Excluded  Redemption  Event  is
pursuant to Section 3(h)(iv), then (I) then beginning on and including the first
day following the receipt by the Company of a Holders' Excluded Redemption Event
Notice,  the Company  shall pay to each holder of  Preferred  Shares an Excluded
Redemption  Event Daily Payment on each day that such Excluded  Redemption Event
continues, provided, however, that the Company shall not be obligated to make an
Excluded  Redemption  Event  Daily  Payment for more than 10 days in any 365 day
period and (II) immediately  upon the occurrence of such an Excluded  Redemption
Event (and from time to time as  applicable),  the  Initial  Fixed  Price of the
Preferred  Shares shall be adjusted to equal the lesser of (y) the Initial Fixed
Price in effect  for such  Preferred  Shares on the  Occurrence  Date or (z) the
product of ((alpha)) the Payment Limitation Reduction  Percentage  multiplied by
((beta)) .80 multiplied by ((gamma)) the lowest Variable Conversion Price during
the period beginning on and including the date on which the purchase,  tender or
exchange  offer or a proxy  or  consent  solicitation  (referred  to in  Section
3(h)(vi))  was first  publically  announced and ending on and including the date
such  purchase,  tender or exchange offer or proxy or consent  solicitation  was
publicly announced as being consummated, abandoned or terminated.

"Excluded  Redemption Event Daily Payment" shall mean the payment to each holder
of Preferred  Shares,  by the Company,  of an amount in cash per Preferred Share
equal  to  one  percent  (1%)  of the  Liquidation  Value.  "Payment  Limitation
Reduction  Percentage"  shall  mean  (I)  85%,  with  respect  to  any  Excluded
Redemption Event other than the first Excluded  Redemption Event to occur during
any 365 day  period,  provided  that the  Company  shall  have made an  Excluded
Redemption  Event  Daily  Payment  on at least 15 days in such 365 day period or
(II) 100%, otherwise.

                                      -24-
<PAGE>


                  (4)      Inability to Fully Convert.

                           (a)       Holder's  Option if  Company  Cannot  Fully
Convert.  If,  upon the  Company's  receipt  of a  Conversion  Notice  or on the
Maturity Date,  the Company can not issue shares of Common Stock  registered for
resale  under the  Registration  Statement  for any reason,  including,  without
limitation,  because the Company (I) does not have a sufficient number of shares
of Common  Stock  authorized  and  available,  (II) is otherwise  prohibited  by
applicable law or by the rules or regulations of any stock exchange, interdealer
quotation system or other  self-regulatory  organization  with jurisdiction over
the Company or its Securities, including without limitation the Exchange Cap (as
defined in Section 14 below),  from  issuing all of the Common Stock which is to
be issued to a holder of Preferred  Shares  pursuant to a  Conversion  Notice or
(III) fails to have a sufficient number of shares of Common Stock registered for
resale under the  Registration  Statement,  then the Company shall issue as many
shares of Common Stock as it is able to issue in  accordance  with such holder's
Conversion  Notice  and  pursuant  to  Section  2(f) and,  with  respect  to the
unconverted  Preferred Shares,  the holder,  solely at such holder's option, can
elect to:

                                    (i)     require  the  Company to redeem from
such  holder  those  Preferred  Shares for which the  Company is unable to issue
Common Stock in accordance  with such  holder's  Conversion  Notice  ("Mandatory
Redemption") at a price per Preferred Share (the "Mandatory  Redemption  Price")
equal to the product of (A) the Conversion Rate and (B) the Closing Bid Price as
of such Conversion Date;

                                    (ii)     if the Company's inability to fully
convert Preferred Shares is pursuant to Section  4(a)(III),  require the Company
to issue  restricted  shares of Common Stock in  accordance  with such  holder's
Conversion Notice and pursuant to Section 2(f);


                                    (iii)  void its Conversion Notice and retain
or have returned,  as the case may be, the  nonconverted  Preferred  Shares that
were to be converted pursuant to such holder's  Conversion Notice (provided that
a  holder's  voiding  its  Conversion  Notice  shall not  effect  the  Company's
obligations  to make any payments  which have accrued  prior to the date of such
notice); or

                                    (iv)  if  the  Company's  inability to fully
convert  Preferred  Shares is pursuant to the Exchange Cap  described in Section
4(a)(II), require the Company to issue shares of Common Stock in accordance with
such  holder's  Conversion  Notice and  pursuant to Section 2(f) at a Conversion
Price  equal to the  average of Closing  Bid Prices of the Common  Stock for the
five  consecutive  trading days  preceding  such holder's  Notice in Response to
Inability  to  Convert  (as  defined  below) or such  other  market  price  that
satisfies the applicable exchange or trading market.

                           (b)      Mechanics of Fulfilling  Holder's  Election.
Upon receipt of a facsimile  copy of a Conversion  Notice from such holder which
cannot be fully  satisfied  as  described  in Section  4(a),  the Company  shall
promptly but in no event later than one (1) day following  such receipt send via

                                      -25-
<PAGE>

facsimile to a holder of Preferred  Shares, a notice of the Company's  inability
to fully  satisfy  such  holder's  Conversion  Notice (the  "Inability  to Fully
Convert Notice").  Such Inability to Fully Convert Notice shall indicate (i) the
reason  why the  Company is unable to fully  satisfy  such  holder's  Conversion
Notice,  (ii) the number of Preferred Shares which cannot be converted and (iii)
the applicable  Mandatory Redemption Price. Such holder shall notify the Company
of its election pursuant to Section 4(a) above by delivering  written notice via
facsimile  to the Company  ("Notice in Response to Inability to Convert") by the
later of (A) the date  which  is 30 days  after  such  holder's  receipt  of the
Inability  to  Fully  Convert  Notice  and (B) the  second  (2nd)  Business  Day
following the date on which the Company  provides such holder  written notice it
has cured its inability to fully convert.

                           (c)      Payment of Redemption Price.  If such holder
shall elect to have its shares redeemed pursuant to Section 4(a)(i), the Company
shall pay the Mandatory  Redemption Price in cash to such holder within ten days
of the  Company's  receipt of the  holder's  Notice in Response to  Inability to
Convert.  If the Company shall fail to pay the applicable  Mandatory  Redemption
Price to such holder on a timely  basis as described in this Section 4(c) (other
than pursuant to a dispute as to the determination of the arithmetic calculation
of the  Redemption  Price),  in addition to any remedy such holder of  Preferred
Shares may have under this Certificate of Designations,  the Securities Purchase
Agreement and the Registration  Rights Agreement,  such unpaid amount shall bear
interest at the rate of 1.5% per month  (prorated for partial months) until paid
in full.  Until  the  full  Mandatory  Redemption  Price is paid in full to such
holder,  such holder may void the  Mandatory  Redemption  with  respect to those
Preferred Shares for which the full Mandatory Redemption Price has not been paid
and (i) receive back such  Preferred  Shares and (ii) the Initial Fixed Price of
such  returned  Preferred  Shares  shall be  adjusted  to the  lesser of (A) the
Initial  Fixed  Price in  effect  on the date on which  the  holder  voided  the
Mandatory  Redemption  and (B) the lowest  Closing  Bid Price  during the Period
beginning on the  Conversion  Date and ending on the date the holder  voided the
Mandatory Redemption. Notwithstanding the foregoing, if the Company fails to pay
the applicable  Mandatory  Redemption  Price within such ten-day period due to a
dispute as to the determination of the arithmetic  calculation of the Redemption
Price,  such dispute shall be resolved  pursuant to Section  2(f)(iii)  with the
term "Redemption Price" being substituted for the term "Conversion Rate".

                           (d)      Pro-rata Conversion and  Redemption.  In the
event the Company receives a Conversion  Notice,  Notice of Redemption at Option
of Buyer Upon Major  Transaction or Notice of Redemption at Option of Buyer Upon
Triggering  Event from more than one holder of Preferred  Shares on the same day
and the Company can convert  and/or  redeem some,  but not all, of the Preferred
Shares  pursuant to this  Section 4, the Company  shall  convert and redeem from
each holder of Preferred  Shares electing to have Preferred Shares converted and
redeemed at such time an amount equal to such holder's pro-rata amount (based on
the number of  Preferred  Shares held by such  holder  relative to the number of
Preferred  Shares  outstanding)  of all  Preferred  Shares being  converted  and
redeemed at such time.

                           (e)      Forced Delisting. If the Company's inability
to fully  convert  Preferred  Shares is  pursuant  to the  Exchange  Cap and the
stockholders  have not voted to approve issuances in excess of the Exchange Cap,
and if so directed by the holders of at least two-thirds of the Preferred Shares
then outstanding,  the Company shall promptly,  but in no event later than three
(3) Business Days after receiving such directions,  delist the Common Stock from

                                      -26-
<PAGE>

the exchange or automated  quotation  system on which the Common Stock is traded
and have the Common Stock,  at such holders'  option,  traded on the  electronic
bulletin board or the "pink sheets."


                 (5) Conversion at the Company's Election.  During the three (3)
Business Days (a "Conversion Election Period") which immediately follow at least
twenty (20)  consecutive  trading days during which the Closing Bid Price of the
Common  Stock on each  trading day during such twenty (20)  consecutive  trading
days is not less than 200% of the  Trigger  Price,  the  Company  shall have the
right, in its sole  discretion,  to require that any or all of such  outstanding
Preferred  Shares be  converted  ("Conversion  at  Company's  Election")  at the
Conversion  Rate;  provided  that the  Conditions to Conversion at the Company's
Election  (as set forth below) are  satisfied.  The Company  shall  exercise its
right to Conversion at Company's  Election by providing each holder of Preferred
Shares written notice  ("Notice of Conversion at Company's  Election")  during a
Conversion  Election  Period  and at least  15  trading  days  prior to the date
selected by the Company for conversion  ("Company's  Election Conversion Date").
If the  Company  elects to  require  conversion  of some,  but not all,  of such
Preferred  Shares,  the  Company  shall  convert an amount  from each  holder of
Preferred  Shares equal to such holder's pro rata amount (based on the number of
such  Preferred  Shares  held by such  holder  relative  to the  number  of such
Preferred Shares  outstanding on date of the Company's delivery of the Notice of
Conversion  at  Company's  Election)  of all  Preferred  Shares  the  Company is
requiring to be converted.  The Notice of Conversion at Company's Election shall
indicate  (x) the  number of  Preferred  Shares the  Company  has  selected  for
conversion,  (y) the Company's Election Conversion Date, which date shall be not
less than 15 or more than 30 trading  days after each  holder's  receipt of such
notice, and (z) each holder's pro rata share of outstanding Preferred Shares the
Company  is  requiring  to be  converted.  All  Preferred  Shares  selected  for
conversion in accordance with the provision of this Section 5 shall be converted
as of the Company's Election  Conversion Date in accordance with Section 2 as if
the holders of such Preferred Shares selected by the Company to be converted had
given the  Conversion  Notice on the  Company's  Election  Conversion  Date.  If
required by Section  2(f)(vii),  all holders of Preferred Shares shall thereupon
and within  two  Business  Days after the  Company's  Election  Conversion  Date
surrender  all  Preferred  Stock  Certificates  selected  for  conversion,  duly
endorsed for  cancellation,  to the Company.  "Conditions  to  Conversion at the
Company's Election" means the following  conditions:  (i) on each day during the
period beginning 30 days prior to the date of the Company's Notice of Conversion
at  Company's  Election  and  ending on and  including  the  Company's  Election
Conversion Date, the Registration Statement shall be 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 (without
regard to any  limitations  on conversion  herein or  elsewhere),  including the
Conversion  Shares to be issued  pursuant to this  Conversion  at the  Company's
Election,  and (B) the  number of  Conversion  Shares  that are then held by the
holders of the Preferred Shares; (ii) on each day during the period beginning 30
days  prior to the date of the  Company's  Notice  of  Conversion  at  Company's
Election and ending on and including the Company's Election Conversion Date, the
Common Stock is designated for quotation on The Nasdaq National Market or listed
on  The  New  York  Stock  Exchange,  Inc.  and is not  suspended  from  trading
(excluding  suspensions  of not  more  than  one  day  resulting  from  business
announcements);  (iii)  on each  day  during  the 20  consecutive  trading  days
immediately preceding the date of the receipt by the holders of Preferred Shares
of the Notice of Conversion at Company's Election,  the Closing Bid Price of the

                                      -27-
<PAGE>

Common Stock is at least 200% of the Trigger Price;  (iv) on each day during the
period  beginning  on and  including  the date of the  receipt by the holders of
Preferred Shares of the Notice of Conversion at Company's Election and ending on
and including the Company's  Election  Conversion Date, the Closing Bid Price of
the Common  Stock is at least 200% of the Trigger  Price;  (v) during the period
beginning on the Initial Issuance Date and ending on and including the Company's
Election Conversion Date, the Company shall have delivered all Conversion Shares
upon conversion of the Preferred  Shares to the holders of Preferred Shares on a
timely  basis  as  set  forth  in  Section   2(f)(ii)  of  this  Certificate  of
Designations;  provided,  however, that for purposes of this Section 5 only, the
Company shall be deemed to have satisfied the condition set forth in this clause
(v)  if on  not  more  than  two  occasions  the  Company  failed  to  meet  the
requirements  of Section  2(g)(ii)  by no more than three days;  (vi)  neither a
Triggering  Event nor any event that with the passage of time would constitute a
Triggering  Event  (assuming  it was not cured) shall have  occurred;  (vii) the
Company shall not give a Notice of Conversion at Company's Election prior to the
date which is the Fixed  Conversion  Price Trigger Date;  and (viii) the Company
otherwise has satisfied its  obligations in all material  respects and is not in
default in any material  respect under this  Certificate  of  Designations,  the
Securities   Purchase   Agreement  and  the   Registration   Rights   Agreement.
Notwithstanding  the above,  any holder of  Preferred  Shares may  convert  such
shares  (including  Preferred  Shares selected for conversion) into Common Stock
pursuant  to  Section  2(a) on or prior to the date  immediately  preceding  the
Company's Election Conversion Date.


                 (6) Company's Right to Redeem in Lieu of Conversion. Subject to
the terms and conditions of this Section 6 below,  at any time after the Initial
Issuance  Date,  and so long as the Company has provided  appropriate  notice as
described  below, the Company may elect to redeem Preferred Shares submitted for
conversion  in lieu of  converting  such  Preferred  Shares,  provided  that the
Conversion Price for such Preferred Shares on the Conversion Date is less than a
price (the "Redemption in Lieu of Conversion Trigger Price") equal to 90% of the
Initial Fixed Price,  which  relates to such  Preferred  Shares,  (appropriately
adjusted for any stock  split,  stock  dividend,  combination  or other  similar
transaction)  (a "Company  Redemption  in Lieu of  Conversion").  If the Company
elects to redeem  some,  but not all,  of the  Preferred  Shares  submitted  for
conversion,  the Company  shall  redeem a number of  Preferred  Shares from each
holder of Preferred Shares submitted for conversion on the applicable date equal
to such holder's  pro-rata amount (based on the number of Preferred  Shares held
by such holder  relative to the number of Preferred  Shares  outstanding) of all
Preferred Shares submitted for conversion which the Company elects to redeem.

                           (a)      Redemption  Price of  Company  Redemption in
Lieu of  Conversion.  The  "Redemption  Price of Company  Redemption  in Lieu of
Conversion"  shall  be an  amount  per  Preferred  Share  equal  to  105% of the
Liquidation Value of such Preferred Shares.

                           (b)      Mechanics of Company  Redemption  in Lieu of
Conversion. The Company shall exercise its right to redeem by delivering written
notice by facsimile and overnight courier ("Notice of Company Redemption in Lieu
of Conversion") to (i) each holder of the Preferred Shares and (ii) the Transfer
Agent.  Such Notice of Company  Redemption in Lieu of Conversion  shall indicate
(A) the maximum,  if any, aggregate number of Preferred Shares which the Company

                                      -28-
<PAGE>

will redeem for Company  Redemption  in Lieu of  Conversion  and (B) confirm the
time period  during which the Company may effect  Company  Redemption in Lieu of
Conversion,  which  period  shall  begin on and  include  the date which is five
Business  Days after the date of receipt by all of the holders' of the Notice of
Redemption  in Lieu of  Conversion  and  shall  end on the date set forth in the
Notice of Company  Redemption in Lieu of Conversion (the  "Redemption in Lieu of
Conversion  Period").  If the  Company  elects to limit the number of  Preferred
Shares which it will redeem during the Redemption in Lieu of Conversion  Period,
the Company shall allocate for redemption from each holder of Preferred Shares a
number of Preferred Shares equal to such holder's  pro-rata amount (based on the
number of  Preferred  Shares  held by such  holder on the date of the  Notice of
Company  Redemption  in Lieu of  Conversion  relative  to the  total  number  of
Preferred  Shares  outstanding  on such  date).  The  Company  may  terminate  a
Redemption  in Lieu of  Conversion  Period at any time with respect to Preferred
Shares which have not been submitted for conversion by delivering written notice
of such  termination  to each  holder  of  Preferred  Shares  by  facsimile  and
overnight  courier at least five Business  Days prior to the  effective  date of
such  termination.  Notwithstanding  anything to the contrary in this Section 6,
the  Company  shall  convert  Preferred  Shares  pursuant  to  Section 2 if such
Preferred Shares are submitted for conversion (i) before the beginning, or after
the effective date of the  termination,  of the Redemption in Lieu of Conversion
Period,  (ii) for a Conversion  Price greater than or equal to the Redemption in
Lieu of  Conversion  Trigger  Price or (iii) are in excess of such  holder's pro
rata allocation of the maximum number of Preferred Shares the Company  indicated
that it would redeem in its Notice of Company Redemption in Lieu of Conversion.


                           (c)      Payment  of Redemption  Price.  The  Company
shall pay the  applicable  Redemption  Price of  Company  Redemption  in Lieu of
Conversion to the holder of the Preferred  Shares being redeemed in cash by wire
transfer within five Business Days after the applicable Conversion Date on which
such Preferred Shares are submitted for conversion. If the Company shall fail to
pay the applicable  Redemption Price of Company Redemption in Lieu of Conversion
to such holder on a timely basis as described in this Section  6(c), in addition
to any remedy such holder of Preferred Shares may have under this Certificate of
Designations  and the Securities  Purchase  Agreement,  such unpaid amount shall
bear  interest  at the rate of 1.5% per  month  until  paid in full.  Until  the
Company pays such unpaid  applicable  Redemption Price of Company  Redemption in
Lieu  of  Conversion  full to each  holder,  each  holder  of  Preferred  Shares
submitted for redemption pursuant to this Section 6 and for which the applicable
Redemption Price of Company  Redemption in Lieu of Conversion has not been paid,
shall have the option to, in lieu of  redemption,  (A) to require the Company to
promptly  return to each holder all of the Preferred  Shares that were submitted
for  redemption by such holder under this Section 6 and for which the applicable
Redemption  Price of Company  Redemption in Lieu of Conversion has not been paid
or (B) to convert those  Preferred  Shares for which the  applicable  Redemption
Price of the Company  Redemption  in Lieu of  Conversion  has not been paid at a
Conversion  Price equal to the lesser of (I) the Conversion  Price applicable to
such  conversion  on the date on which such  Preferred  Shares  were  originally
presented for conversion and (II) the Conversion  Price which would have been in
effect if such  Preferred  Shares were  presented for conversion on the Business
Day immediately  following the last day on which the Company could have effected
a timely  Company  Redemption in Lieu of Conversion,  by sending  written notice
thereof to the Company via  facsimile  (the "Void Company  Redemption  Notice").
Upon the Company's receipt of such Void Company Redemption Notice(s), requesting

                                      -29-
<PAGE>

the return of the  Preferred  Shares,  prior to  payment of the full  applicable
redemption  price  to each  holder,  (i)  the  Company's  Redemption  in Lieu of
Conversion  shall be null and  void  with  respect  to  those  Preferred  Shares
submitted for redemption and for which the applicable  redemption  price has not
been paid and with respect to any Preferred  Shares  submitted in the future for
conversion in the same Redemption in Lieu of Conversion Period, (ii) the Company
shall  promptly,  but in no event later than one (1) day following such receipt,
return  any  Preferred  Shares  submitted  to the  Company  by each  holder  for
redemption under this Section 6 and for which the applicable Redemption Price of
Company  Redemption in Lieu of Conversion  has not been paid and (iii) the Fixed
Conversion  Price of such  returned  Preferred  Shares  shall be adjusted to the
lesser of (I) the Conversion  Price applicable to such conversion on the date on
which such Preferred  Shares were  originally  presented for conversion and (II)
the lowest  Conversion  Price which would have been in effect if such  Preferred
Shares were  presented  for  conversion  on any  Business  Day during the period
beginning on the Business Day  immediately  following  the last day on which the
Company  could have effected a timely  Company  Redemption in Lieu of Conversion
and ending on the date of the Company's  receipt of the applicable  Void Company
Redemption Notice.  Notwithstanding  the foregoing,  if the Company fails to pay
the applicable Redemption Price of Company Redemption in Lieu of Conversion to a
holder within the time period described in this Section 6(d) due to a dispute as
to the arithmetic  calculation of the Redemption Price of Company  Redemption in
Lieu of Conversion, such dispute shall be resolved pursuant to Section 2(f)(iii)
above  with  the  term  "Redemption  Price  of  Company  Redemption  in  Lieu of
Conversion"  being  substituted for the term  "Conversion  Rate." If the Company
fails to timely effect a Company  Redemption in Lieu of Conversion in accordance
with this Section 6, the Company shall not be allowed to submit  another  Notice
of Company Redemption in Lieu of Conversion without the prior written consent of
the holders of at least two-thirds of the Preferred Shares then outstanding.

                           (d)     Company Must Have Immediately Available Funds
or Credit  Facilities.  The Company  shall not be entitled to send any Notice of
Company  Redemption  in Lieu of  Conversion  pursuant to Section  6(b) above and
begin the redemption procedure under this Section 6, unless it has:

                                    (i)  the full amount of the Redemption Price
of Company  Redemption in Lieu of  Conversion in cash,  available in a demand or
other immediately available account in a bank or similar financial institution;

                                    (ii)  credit  facilities,  with  a  bank  or
similar financial  institutions that are immediately  available and unrestricted
for use in redeeming the Preferred  Shares, in the full amount of the Redemption
Price of Company Redemption in Lieu of Conversion;

                                    (iii) a  written  agreement  with a  standby
underwriter  or  qualified  buyer ready,  willing and able to purchase  from the
Company a sufficient number of shares of stock to provide proceeds  necessary to
redeem any Preferred Shares that are not converted prior to a Company Redemption
in Lieu of Conversion; or

                                      -30-
<PAGE>


                                    (iv) a combination of the items set forth in
the preceding clauses (i), (ii)
and  (iii),  aggregating  the full  amount of the  Redemption  Price of  Company
Redemption in Lieu of Conversion.

                  (7) Redemption at the Company's Election. At any time or times
on or after the Initial  Issuance Date the Company shall have the right,  in its
sole discretion,  to require that all, but not less than all, of the outstanding
Preferred Shares be redeemed ("Redemption at Company's Election") at a price per
share which  would  provide a 20%  annualized  return on the  Liquidation  Value
("Company's  Election  Redemption  Price");  provided  that  the  Conditions  to
Redemption at the  Company's  Election (as set forth below) are  satisfied.  The
Company  shall  exercise  its  right to  Redemption  at  Company's  Election  by
providing each holder of Preferred  Shares written notice ("Notice of Redemption
at  Company's  Election")  at  least  20  trading  days  prior  to the  date  of
consummation of such redemption  ("Company's  Election  Redemption  Date").  The
Notice of Redemption at Company's Election shall indicate the Company's Election
Redemption  Date.  If the  Company  has  exercised  its right of  Redemption  at
Company's  Election and the conditions to such Redemption at Company's  Election
have been  satisfied,  then all Preferred  Shares  outstanding  at the Company's
Election  Redemption  Date  shall  be  redeemed  as of  the  Company's  Election
Redemption Date by payment by the Company to each holder of Preferred  Shares of
the Company's Election  Redemption Price. If required by Section 2(f)(vii),  all
holders of Preferred  Shares shall  thereupon and within two Business Days after
the Company's Election  Redemption Date, or such earlier date as the Company and
each holder of  Preferred  Shares  mutually  agree,  surrender  all  outstanding
Preferred Stock Certificates, duly endorsed for cancellation, to the Company. If
the  Company  fails to pay the full  Company's  Election  Redemption  Price with
respect to any Preferred Shares then the Redemption at Company's  Election shall
be null and void with  respect to such  Preferred  Shares and the holder of such
Preferred  Shares shall be entitled to all the rights of a holder of outstanding
Preferred Shares set forth in this  Certificate of Designations.  "Conditions to
Redemption at the Company's Election" means the following conditions: (i) during
the period  beginning on the Initial  Issuance  Date and ending on and including
the  Company's  Election  Redemption  Date,  the  Company  shall have  delivered
Conversion  Shares upon conversion of the Preferred Shares to the holders of the
Preferred  Shares on a timely  basis as set forth in  Section  2(f)(ii)  of this
Certificate  of  Designations;  provided,  however,  that for  purposes  of this
Section 6 only,  the Company shall be deemed to have satisfied the condition set
forth in this clause (i) if on not more than two occasions the Company failed to
meet the  requirements  of Section  2(g)(ii) by no more than three days; (ii) on
each day  during  the  period  beginning  30 days prior to the date of Notice of
Redemption  at Company's  Election  and ending on and  including  the  Company's
Election  Redemption  Date, the  Registration  Statement  shall be 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 (without  regard to any  limitations on conversion  herein or elsewhere),
including the Conversion  Shares to be issued pursuant to this Redemption at the
Company's  Election,  and (B) the number of Conversion Shares that are then held
by the  holders  of the  Preferred  Shares;  (iii) on each day during the period
beginning  30 days  prior to the  date of  Notice  of  Redemption  at  Company's
Election and ending on and including the Company's Election Redemption Date, the
Common Stock is designated for quotation on The Nasdaq National Market or listed
on  The  New  York  Stock  Exchange,  Inc.  and is not  suspended  from  trading
(excluding  suspensions  of not  more  than  one  day  resulting  from  business

                                      -31-
<PAGE>

announcements);  (iv) during the period  beginning on the Initial  Issuance Date
and ending on and including the Company's Election  Redemption Date, there shall
not have occurred either (A) the consummation of a Major Transaction or a public
announcement  of a pending  Major  Transaction  which has not been  abandoned or
terminated  or (B) a  Triggering  Event;  and  (v)  the  Company  otherwise  has
satisfied its obligations in all material  respects and is not in default in any
material respect under this Certificate of Designations, the Securities Purchase
Agreement and the Registration Rights Agreement.  Notwithstanding the above, any
holder of Preferred Shares may convert such shares  (including  Preferred Shares
selected for redemption)  into Common Stock pursuant to Section 2(a) on or prior
to the date immediately preceding the Company's Election Redemption Date.

                  (8) Reissuance of Certificates.  Subject to Section 2(f)(vii),
in the event of a  conversion  or  redemption  pursuant to this  Certificate  of
Designations  of  less  than  all  of  the  Preferred  Shares  represented  by a
particular  Preferred Stock Certificate,  the Company shall promptly cause to be
issued and delivered to the holder of such  Preferred  Shares a preferred  stock
certificate  representing the remaining  Preferred Shares which have not been so
converted or redeemed.

                  (9)  Reservation of Shares.  The Company shall, so long as any
of the Preferred Shares are  outstanding,  reserve and keep available out of its
authorized  and unissued  Common Stock,  solely for the purpose of effecting the
conversion  of the  Preferred  Shares,  such number of shares of Common Stock as
shall from time to time be  sufficient  to effect the  conversion  of all of the
Preferred  Shares  then  outstanding  (without  regard  to  any  limitations  on
conversions);  provided  that the number of shares of Common  Stock so  reserved
shall at no time be less than 200% of the  number of shares of Common  Stock for
which the Preferred  Shares are at any time  convertible.  The initial number of
shares of Common Stock reserved for conversions of the Preferred Shares and each
increase in the number of shares so reserved  shall be allocated  pro rata among
the holders of the Preferred Shares based on the number of Preferred Shares held
by each holder at the time of issuance  of the  Preferred  Shares or increase in
the number of reserved  shares,  as the case may be. In the event a holder shall
sell  or  otherwise  transfer  any  of  such  holder's  Preferred  Shares,  each
transferee  shall be  allocated  a pro rata  portion of the  number of  reserved
shares of Common Stock reserved for such transferor.  Any shares of Common Stock
reserved and which remain  allocated to any person or entity which does not hold
any Preferred  Shares shall be allocated to the  remaining  holders of Preferred
Shares,  pro rata  based on the  number of  Preferred  Shares  then held by such
holder.

                  (10) Voting Rights.  Holders of Preferred Shares shall have no
voting  rights,  except as  required  by law,  including  but not limited to the
General  Corporation Law of the State of Delaware,  and as expressly provided in
this Certificate of Designations.

                  (11) Liquidation, Dissolution, Winding-Up. In the event of any
voluntary or involuntary liquidation,  dissolution or winding up of the Company,
the holders of the Preferred  Shares shall be entitled to receive in cash out of
the assets of the Company,  whether from capital or from earnings  available for
distribution  to its  stockholders  (the "Preferred  Funds"),  before any amount

                                      -32-
<PAGE>

shall be paid to the holders of any of the  capital  stock of the Company of any
class junior in rank to the Preferred Shares in respect of the preferences as to
the distributions and payments on the liquidation, dissolution and winding up of
the Company,  an amount per Preferred  Share equal to the sum of (i) $10,000 and
(ii) the  Additional  Amount  (such sum being  referred  to as the  "Liquidation
Value");  provided that, if the Preferred Funds are insufficient to pay the full
amount due to the  holders of  Preferred  Shares and  holders of shares of other
classes or series of preferred  stock of the Company that are of equal rank with
the  Preferred  Shares as to  payments  of  Preferred  Funds  (the  "Pari  Passu
Shares"),  then each  holder of  Preferred  Shares and Pari Passu  Shares  shall
receive  a  percentage  of the  Preferred  Funds  equal  to the full  amount  of
Preferred  Funds  payable  to  such  holder  as  a  liquidation  preference,  in
accordance with their respective  Certificate of  Designations,  Preferences and
Rights,  as a percentage  of the full amount of Preferred  Funds  payable to all
holders of Preferred Shares and Pari Passu Shares. The purchase or redemption by
the Company of stock of any class,  in any manner  permitted by law,  shall not,
for the purposes hereof, be regarded as a liquidation, dissolution or winding up
of the Company.  Neither the consolidation or merger of the Company with or into
any  other  Person,  nor the  sale  or  transfer  by the  Company  of less  than
substantially all of its assets, shall, for the purposes hereof, be deemed to be
a liquidation,  dissolution or winding up of the Company. No holder of Preferred
Shares shall be entitled to receive any amounts  with  respect  thereto upon any
liquidation,  dissolution  or winding up of the  Company  other than the amounts
provided  for  herein;  provided  that a holder  of  Preferred  Shares  shall be
entitled  to all  amounts  previously  accrued  with  respect  to  amounts  owed
hereunder.

                  (12) Preferred Rank; Participation. All shares of Common Stock
shall be of junior rank to all Preferred Shares in respect to the preferences as
to distributions  and payments upon the liquidation,  dissolution and winding up
of the Company. The rights of the shares of Common Stock shall be subject to the
preferences  and  relative  rights of the  Preferred  Shares.  Without the prior
express  written  consent of the holders of not less than two-thirds of the then
outstanding Preferred Shares, the Company shall not hereafter authorize or issue
additional  Preferred Shares or other capital stock that is of rank senior to or
pari  passu  with the  Preferred  Shares in  respect  of the  preferences  as to
distributions  and payments upon the liquidation,  dissolution and winding up of
the Company.  Without the prior  express  written  consent of the holders of not
less than two-thirds of the then outstanding Preferred Shares, the Company shall
not hereafter  authorize or make any amendment to the Company's  Certificate  of
Incorporation or bylaws, or file any resolution of the board of directors of the
Company  with the  Secretary  of State of the State of Delaware  containing  any
provisions,  which  would  adversely  affect or  otherwise  impair the rights or
relative priority of the holders of the Preferred Shares relative to the holders
of the Common Stock or the holders of any other class of capital  stock.  In the
event  of the  merger  or  consolidation  of the  Company  with or into  another
corporation,   the  Preferred  Shares  shall  maintain  their  relative  powers,
designations  and  preferences  provided  for herein and no merger  shall result
inconsistent therewith.

                  (13) Restriction on Redemption and Cash Dividends with respect
to Other Capital Stock. Until all of the Preferred Shares have been converted or
redeemed as provided  herein,  the Company  shall not,  directly or  indirectly,
redeem, or declare or pay any cash dividend or distribution on, its Common Stock
without  the prior  express  written  consent  of the  holders  of not less than
two-thirds of the then outstanding Preferred Shares.

                                      -33-
<PAGE>


                  (14)    Limitation   on   Number   of    Conversion    Shares.
Notwithstanding  any other provision herein,  the Company shall not be obligated
to issue any shares of Common Stock upon  conversion of the Preferred  Shares if
the  issuance of such shares of Common  Stock would exceed that number of shares
of Common  Stock which the Company may issue upon  Conversion  of the  Preferred
Shares (the "Exchange Cap") without breaching the Company's obligations, if any,
under the rules or  regulations  of The Nasdaq Stock Market or such  exchange on
which the stock is then traded,  except that such limitation  shall not apply in
the event that the  Company (a) obtains  the  approval  of its  stockholders  as
required by applicable  rules and regulations of The Nasdaq Stock Market or such
other  exchange on which the stock is then traded for  issuances of Common Stock
in excess of such amount, (ii) obtains a written opinion from outside counsel to
the  Company  that  such  approval  is not  required,  which  opinion  shall  be
reasonably  satisfactory  to the holders of a majority of the  Preferred  Shares
then outstanding or (iii) the required number of holders of the Preferred Shares
exercised  their rights  pursuant to Section 4(e) to have the Company remove the
Common Stock from quotation in the Nasdaq National Market or such other exchange
on which the stock is then  traded.  Until such  approval or written  opinion is
obtained or such  action has been taken by the  required  number of holders,  no
purchaser of Preferred Shares pursuant to the Securities Purchase Agreement (the
"Purchasers")  shall be issued,  upon conversion of Preferred Shares,  shares of
Common  Stock in an amount  greater  than the  product of (i) the  Exchange  Cap
amount  multiplied  by (ii) a fraction,  the numerator of which is the number of
Preferred  Shares issued to such Purchaser  pursuant to the Securities  Purchase
Agreement  and the  denominator  of which  is the  aggregate  amount  of all the
Preferred  Shares issued to the Purchasers  pursuant to the Securities  Purchase
Agreement (the "Cap Allocation  Amount").  In the event that any Purchaser shall
sell  or  otherwise  transfer  any of such  Purchaser's  Preferred  Shares,  the
transferee  shall  be  allocated  a pro rata  portion  of such  Purchaser's  Cap
Allocation  Amount.  In the event  that any  holder of  Preferred  Shares  shall
convert all of such holder's  Preferred Shares into a number of shares of Common
Stock which, in the aggregate, is less than such holder's Cap Allocation Amount,
then the difference  between such holder's Cap Allocation  Amount and the number
of shares of Common Stock  actually  issued to such holder shall be allocated to
the  respective  Cap  Allocation  Amounts of the remaining  holders of Preferred
Shares on a pro rata basis in proportion to the number of Preferred  Shares then
held by each such holder.

                  (15) Vote to Change  the Terms of or Issue  Preferred  Shares.
The  affirmative  vote at a meeting  duly called for such purpose or the written
consent  without a meeting,  of the holders of not less than  two-thirds  of the
then outstanding  Preferred Shares, shall be required for (a) any change to this
Certificate of Designations or the Company's  Certificate of Incorporation which
would  amend,  alter,  change  or  repeal  any  of  the  powers,   designations,
preferences and rights of the Preferred Shares, or (b) any issuance of Preferred
Shares other than pursuant to the Securities Purchase Agreement.

                  (16) Lost or Stolen Certificates.  Upon receipt by the Company
of evidence  satisfactory  to the  Company of the loss,  theft,  destruction  or
mutilation  of any  Preferred  Stock  Certificates  representing  the  Preferred
Shares,  and, in the case of loss, theft or destruction,  of an  indemnification
undertaking  by the holder to the Company and, in the case of  mutilation,  upon
surrender and  cancellation of the Preferred Stock  Certificate(s),  the Company

                                      -34-
<PAGE>

shall execute and deliver new preferred stock  certificate(s)  of like tenor and
date;  provided,  however,  the  Company  shall  not be  obligated  to  re-issue
preferred  stock  certificates  if the  holder  contemporaneously  requests  the
Company to convert such Preferred Shares into Common Stock.

                  (17) Remedies, Characterizations,  Other Obligations, Breaches
and Injunctive Relief. The remedies provided in this Certificate of Designations
shall be cumulative and in addition to all other remedies  available  under this
Certificate of Designations, at law or in equity (including a decree of specific
performance and/or other injunctive relief), no remedy contained herein shall be
deemed a waiver of compliance with the provisions giving rise to such remedy and
nothing  herein shall limit a holder's  right to pursue  actual  damages for any
failure  by the  Company  to  comply  with  the  terms  of this  Certificate  of
Designations.  The Company  covenants  to each holder of  Preferred  Shares that
there shall be no  characterization  concerning  this  instrument  other than as
expressly  described  herein.  Amounts  set forth or  provided  for herein  with
respect to payments, conversion and the like (and the computation thereof) shall
be the  amounts to be received  by the holder  thereof and shall not,  except as
expressly provided herein, be subject to any other obligation of the Company (or
the performance  thereof).  The Company  acknowledges that a breach by it of its
obligations  hereunder  will  cause  irreparable  harm  to  the  holders  of the
Preferred  Shares  and  that  the  remedy  at law for  any  such  breach  may be
inadequate.  The Company  therefore agrees that, in the event of any such breach
or threatened breach, the holders of the Preferred Shares shall be entitled,  in
addition to all other  available  remedies,  to an  injunction  restraining  any
breach,  without the necessity of showing  economic loss and without any bond or
other security being required.

                  (18)  Specific  Shall  Not  Limit  General;  Construction.  No
specific provision  contained in this Certificate of Designations shall limit or
modify  any  more  general  provision  contained  herein.  This  Certificate  of
Designations  shall be deemed  to be  jointly  drafted  by the  Company  and all
holders of Preferred Shares and shall not be construed against any person as the
drafter hereof.

                  (19) Failure or Indulgence Not Waiver.  No failure or delay on
the part of a holder of Preferred Shares in the exercise of any power,  right or
privilege  hereunder shall operate as a waiver thereof,  nor shall any single or
partial exercise of any such power, right or privilege preclude other or further
exercise thereof or of any other right, power or privilege.

                  (20)  Whenever  notice is  required  to be given,  it shall be
given in accordance with Section 9(f) of the Securities Purchase Agreement.

                                   * * * * * *

                                      -35-
<PAGE>



         IN  WITNESS  WHEREOF,  the  Company  has  caused  this  Certificate  of
Designations  to be  signed  by  Robert J.  DeLuccia,  its  President  and Chief
Executive Officer as of December __, 1998.

                                                     IMMUNOMEDICS, INC.



                                                    By:
                                                    Name:    Robert J. DeLuccia
                                                    Title:   President and Chief
                                                             Executive Officer



<PAGE>


                                    EXHIBIT I
                               IMMUNOMEDICS, INC.
                                CONVERSION NOTICE

Reference is made to the Certificate of Designations,  Preferences and Rights of
Series F Convertible  Preferred Stock (the  "Certificate of  Designations").  In
accordance with and pursuant to the Certificate of Designations, the undersigned
hereby elects to convert the number of shares of Series G Convertible  Preferred
Stock, par value $.01 per share (the "Preferred Shares"), of Immunomedics, Inc.,
a Delaware  corporation (the  "Company"),  indicated below into shares of Common
Stock,  par value  $.01 per share  (the  "Common  Stock"),  of the  Company,  by
tendering the stock  certificate(s)  representing the Preferred Shares specified
below as of the date specified below.

         Date of Conversion:____________________________________________________

         Number of Preferred Shares to be converted:____________________________

         Stock certificate no(s). of Preferred Shares to be converted:__________

Please confirm the following information:

         Conversion Price:______________________________________________________

         Number of shares of Common Stock
         to be issued:__________________________________________________________

Please  issue the  Common  Stock  into  which  the  Preferred  Shares  are being
converted  and, if  applicable,  any check drawn on an account of the Company in
the following name and to the following address:

         Issue to:______________________________________________________________
                  ______________________________________________________________
                  ______________________________________________________________
                  ______________________________________________________________

         Facsimile Number:______________________________________________________

         Authorization:_________________________________________________________
                                                     By:________________________
                                                     Title:_____________________

         Dated:_________________________________________________________________

         Account Number:
           (if electronic book entry transfer):_________________________________

         Transaction Code Number
           (if electronic book entry transfer):_________________________________

             THIS FORM MUST BE SENT CONCURRENTLY TO COMPANY COUNSEL


<PAGE>


                                 ACKNOWLEDGMENT


         The  Company  hereby  acknowledges  this  Conversion  Notice and hereby
directs  American  Stock  Transfer & Trust Company to issue the above  indicated
number  of  shares  of  Common  Stock  in  accordance  with the  Transfer  Agent
Instructions  dated  December  ___, 1998 from the Company and  acknowledged  and
agreed to by American Stock Transfer & Trust Company.

                                                     IMMUNOMEDICS, INC.



                                                     By:

                                                     Name:   Robert J. DeLuccia
                                                     Title:  President and Chief
                                                             Executive Officer
<PAGE>


                          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

<PAGE>

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

                                      -2-
<PAGE>

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-
<PAGE>

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-
<PAGE>

                  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-
<PAGE>


         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-
<PAGE>


                  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-
<PAGE>

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-
<PAGE>

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-
<PAGE>

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-
<PAGE>

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-
<PAGE>

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-
<PAGE>

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-
<PAGE>


                  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-
<PAGE>

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-
<PAGE>

                  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-
<PAGE>


                  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-
<PAGE>

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-
<PAGE>

                  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-
<PAGE>

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-
<PAGE>


                  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-
<PAGE>

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-
<PAGE>


                  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-
<PAGE>

                  (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-
<PAGE>


         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-
<PAGE>

                  (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-
<PAGE>

         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-
<PAGE>

                  (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-
<PAGE>

                  (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-
<PAGE>

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-
<PAGE>

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-
<PAGE>

         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-
<PAGE>

                  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-
<PAGE>

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-
<PAGE>


         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


<PAGE>


                                     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


<PAGE>
<TABLE>

                               SCHEDULE OF BUYERS

- --------------------------------------------------------------------------------------------------------------------------
<S>                        <C>                                         <C>         <C>
                                                                       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

</TABLE>
<PAGE>
<TABLE>
<S>                         <C>                                           <C>       <C>
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
                         -----------------------------------------------         -----------------------------------------
</TABLE>
<PAGE>


                                    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

<PAGE>


                          REGISTRATION RIGHTS AGREEMENT


         REGISTRATION RIGHTS AGREEMENT (this "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 undersigned  buyers (each, a "Buyer" and collectively,  the
"Buyers").

         WHEREAS:

         A. In connection  with the Securities  Purchase  Agreement by and among
the parties hereto of even date herewith (the "Securities Purchase  Agreement"),
the  Company has agreed,  upon the terms and  subject to the  conditions  of the
Securities  Purchase  Agreement,  to issue and sell to the Buyers  shares of the
Company's Series F Convertible Preferred Stock (the "Initial Preferred Shares"),
which will be convertible  into shares of the Company's  common stock, par value
$.01 per  share  (the  "Common  Stock")  in  accordance  with  the  terms of the
Company's  Certificate of  Designations,  Preferences and Rights of the Series F
Convertible Preferred Stock (the "Certificate of Designations"); and

         B. In connection with the Securities Purchase Agreement, each Buyer may
be obligated,  upon the terms and subject to the  conditions  of the  Securities
Purchase  Agreement,  to purchase  shares of the Company's  Series F Convertible
Preferred  Stock (the "Put Preferred  Shares"),  which will be convertible  into
shares of  Common  Stock in  accordance  with the  terms of the  Certificate  of
Designations  (the Initial  Preferred  Shares and the Put  Preferred  Shares are
collectively  referred  to as  the  "Preferred  Shares"  and as  converted,  the
"Conversion Shares"); and

         C. To induce the Buyers to execute and deliver the Securities  Purchase
Agreement,  the Company has agreed to provide certain  registration rights under
the  Securities  Act  of  1933,  as  amended,  and  the  rules  and  regulations
thereunder, or any similar successor statute (collectively, the "1933 Act"), and
applicable state securities laws.

         NOW,  THEREFORE,  in  consideration  of the  premises  and  the  mutual
covenants  contained  herein  and other  good and  valuable  consideration,  the
receipt and  sufficiency of which are hereby  acknowledged,  the Company and the
Buyers hereby agree as follows:

         1.       DEFINITIONS.

                  As used in this Agreement,  the following terms shall have the
following meanings:



<PAGE>


                  a.  "Investor"  means a  Buyer,  any  transferee  or  assignee
thereof to whom a Buyer  assigns its rights under this  Agreement and who agrees
to become bound by the provisions of this Agreement in accordance with Section 9
and any transferee or assignee  thereof to whom a transferee or assignee assigns
its rights under this Agreement and who agrees to become bound by the provisions
of this Agreement in accordance with Section 9.

                  b. "Person" means a corporation,  a limited liability company,
an association,  a partnership,  an organization,  a business, an individual,  a
governmental or political subdivision thereof or a governmental agency.

                  c. "Register,"  "registered,"  and  "registration"  refer to a
registration   effected  by  preparing  and  filing  one  or  more  Registration
Statements  (as defined  below) in compliance  with the 1933 Act and pursuant to
Rule 415  under  the 1933  Act or any  successor  rule  providing  for  offering
securities on a continuous  basis ("Rule 415"),  and the declaration or ordering
of  effectiveness  of  such  Registration  Statement(s)  by  the  United  States
Securities and Exchange Commission (the "SEC").

                  d. "Registrable Securities" means the Conversion Shares issued
or issuable upon conversion of the Preferred Shares,  any shares of Common Stock
issued as payment of  Registration  Delay  Payments (as defined in Section 2(g))
and any  shares  of  capital  stock  issued  or  issuable  with  respect  to the
Conversion Shares or the Preferred Shares as a result of any stock split,  stock
dividend,  recapitalization,  exchange or similar  event or  otherwise,  without
regard to any limitation on conversions of Preferred Shares.

                  e.  "Initial  Registration  Statement"  means  a  registration
statement or  registration  statements  of the Company  filed under the 1933 Act
covering Registrable Securities relating to the Initial Preferred Shares.

                  f. "Put Registration Statement" means a registration statement
or  registration  statements  of the Company  filed under the 1933 Act  covering
Registrable Securities relating to the Put Preferred Shares.

                  g. "Registration  Statement"  means  the Initial  Registration
Statement and the Put  Registration Statement.

Capitalized  terms used herein and not otherwise  defined  herein shall have the
respective meanings set forth in the Securities Purchase Agreement.

         2.       REGISTRATION.

                  a.       Mandatory Registration.

                           (i)      Initial Mandatory Registration.  The Company
shall prepare,  and, as soon as  practicable  but in no event later than 45 days

                                     -2-
<PAGE>

after the date of issuance of the relevant  Preferred Shares,  file with the SEC
an Initial  Registration  Statement or Initial  Registration  Statements  (as is
necessary) on Form S-3 covering the resale of all of the Registrable  Securities
issuable  pursuant to the Initial  Preferred  Shares (the  "Initial  Registrable
Securities"). In the event that Form S-3 is unavailable for such a registration,
the Company shall use such other form as is available  for such a  registration,
subject to the provisions of Section 2(e). The Initial Registration Statement or
Initial  Registration  Statements  prepared  pursuant  hereto shall register for
resale at least that  number of shares of Common  Stock  equal to the product of
(x) 2.0 and (y) the  number of  Initial  Registrable  Securities  as of the date
immediately  preceding the date the  Registration  Statement is initially  filed
with the SEC,  subject to adjustment  as provided in Section  2(f).  The Company
shall  use its  best  efforts  to have  the  Initial  Registration  Statement(s)
declared effective by the SEC as soon as practicable, but in no event later than
120 days after the issuance of the relevant Preferred Shares.

                           (ii)    Put Mandatory Registration. The Company shall
prepare,  and, as soon as practicable  but in no event later than ten days after
the Put Share  Notice Date (as defined in the  Securities  Purchase  Agreement),
file with the SEC a Put Registration  Statement or Put  Registration  Statements
(as is  necessary)  on Form S-3  covering  the resale of all of the  Registrable
Securities  issuable  pursuant to the Put  Preferred  Shares  covered by the Put
Share Notice (the "Put Registrable  Securities").  In the event that Form S-3 is
unavailable for such a registration, the Company shall use such other form as is
available for such a  registration,  subject to the  provisions of Section 2(e).
Any Put  Registration  Statement  prepared  pursuant  hereto shall  register for
resale at least that  number of shares of Common  Stock  equal to the product of
(x)  2.0 and  (y)  the  number  of Put  Registrable  Securities  as of the  date
immediately  preceding  the  date  such  Additional  Registration  Statement  is
initially filed with the SEC, subject to adjustment as provided in Section 2(f).
The Company shall use its best efforts to have the Put Registration Statement(s)
declared effective by the SEC as soon as practicable, but in no event later than
90 days after the Put Share Notice Date.

                  b.  Piggy-Back  Registrations.  If at any  time  prior  to the
expiration  of the  Registration  Period (as  hereinafter  defined)  the Company
proposes to file with the SEC a Registration  Statement  relating to an offering
for its own  account or the  account of others  under the 1933 Act of any of its
securities  (other  than on Form S-4 or Form S-8 (or their  equivalents  at such
time)  relating  to  securities  to be  issued  solely  in  connection  with any
acquisition  of  any  entity  or  business  or  equity  securities  issuable  in
connection with stock option or other employee  benefit plans) the Company shall
promptly send to each Investor who is entitled to registration rights under this
Section 2(b) written  notice of the Company's  intention to file a  Registration
Statement and of such  Investor's  rights under this Section 2(b) and, if within
twenty (20) days after receipt of such notice, such Investor shall so request in
writing,  the Company  shall include in such  Registration  Statement all or any
part of the  Registrable  Securities  such Investor  requests to be  registered,
subject  to the  priorities  set  forth  in  Section  2(b)  below.  No  right to
registration  of  Registrable  Securities  under  this  Section  2(b)  shall  be
construed to limit any registration required under Section 2(a). The obligations
of the Company  under this  Section  2(b) may be waived by  Investors  holding a
majority of the Registrable Securities.  If an offering in connection with which
an  Investor  is  entitled  to  registration  under  this  Section  2(b)  is  an
underwritten  offering,  then each Investor  whose  Registrable  Securities  are

                                      -3-
<PAGE>

included in such  Registration  Statement shall,  unless otherwise agreed by the
Company,  offer and sell such Registrable Securities in an underwritten offering
using the same  underwriter or  underwriters  and,  subject to the provisions of
this Agreement, on the same terms and conditions as other shares of Common Stock
included  in such  underwritten  offering.  If a  registration  pursuant to this
Section  2(b)  is  to  be an  underwritten  public  offering  and  the  managing
underwriter(s)  advise the Company in  writing,  that in their  reasonable  good
faith  opinion,  marketing or other  factors  dictate  that a limitation  on the
number of  shares of Common  Stock  which may be  included  in the  Registration
Statement is  necessary  to  facilitate  and not  adversely  affect the proposed
offering,  then the Company shall include in such  registration:  (1) first, all
securities the Company proposes to sell for its own account,  (2) second,  up to
the full number of securities  proposed to be registered  for the account of the
holders  of  securities  entitled  to  inclusion  of  their  securities  in  the
Registration  Statement by reason of demand registration  rights, and (3) third,
the securities  requested to be registered by the Investors and other holders of
securities  entitled to participate in the registration,  as of the date hereof,
drawn from them pro rata based on the number each has  requested  to be included
in such registration.

                  c. Allocation of Registrable Securities. The initial number of
Registrable  Securities included in any Registration Statement and each increase
in the number of Registrable  Securities included therein shall be allocated pro
rata among the Investors  based on the number of Registrable  Securities held by
each  Investor at the time the  Registration  Statement  covering  such  initial
number of Registrable  Securities or increase  thereof is declared  effective by
the SEC. In the event that an Investor sells or otherwise  transfers any of such
Person's Registrable  Securities,  each transferee shall be allocated a pro rata
portion of the then remaining number of Registrable  Securities included in such
Registration Statement for such transferor.  Any shares of Common Stock included
in a  Registration  Statement  and which  remain  allocated  to any Person which
ceases to hold any  Registrable  Securities  shall be allocated to the remaining
Investors,  pro rata based on the number of Registrable  Securities then held by
such Investors.

                  d. Legal  Counsel.  Subject  to  Section 5 hereof,  the Buyers
holding a majority of the Registrable  Securities shall have the right to select
one legal counsel to review and oversee any offering  pursuant to this Section 2
("Legal Counsel"), which shall be Katten Muchin & Zavis or such other counsel as
thereafter  designated by the holders of a majority of  Registrable  Securities.
The Company shall  reasonably  cooperate  with Legal  Counsel in performing  the
Company's obligations under this Agreement.

                  e.  Ineligibility  for Form S-3. In the event that Form S-3 is
not available for any  registration  of Registrable  Securities  hereunder,  the
Company  shall (i) register the sale of the  Registrable  Securities  on another
appropriate  form and (ii) undertake to register the  Registrable  Securities on
Form S-3 as soon as such form is  available,  provided  that the  Company  shall
maintain the  effectiveness of the  Registration  Statement then in effect until
such time as a  Registration  Statement  on Form S-3  covering  the  Registrable
Securities has been declared effective by the SEC.


                                      -4-
<PAGE>


                  f. Sufficient  Number of Shares  Registered.  In the event the
number of shares  available  under a  Registration  Statement  filed pursuant to
Section 2(a) is insufficient  to cover all of the  Registrable  Securities or an
Investor's  allocated portion of the Registrable  Securities pursuant to Section
2(c),  the  Company  shall  amend  the  Registration  Statement,  or  file a new
Registration Statement (on the short form available therefor, if applicable), or
both, so as to cover at least 200% of such Registrable  Securities (based on the
then  current  market  price of the  Common  Stock),  in each  case,  as soon as
practicable,  but in any event  not  later  than  fifteen  (15)  days  after the
necessity  therefor arises.  The Company shall use it best efforts to cause such
amendment  and/or new  Registration  Statement  to become  effective  as soon as
practicable  following  the  filing  thereof.  For  purposes  of  the  foregoing
provision,  the number of shares available under a Registration  Statement shall
be deemed  "insufficient  to cover all of the Registrable  Securities" if at any
time the number of Registrable  Securities issued or issuable upon conversion of
the Preferred Shares is greater than the quotient determined by dividing (i) the
number of shares of Common Stock  available  for resale under such  Registration
Statement  by (ii)  1.5.  For  purposes  of the  calculation  set  forth  in the
foregoing  sentence,  any  restrictions on the  convertibility  of the Preferred
Shares shall be disregarded and such calculation shall assume that the Preferred
Shares are then  convertible  into shares of Common Stock at the then prevailing
Conversion Rate (as defined in the Company's Certificate of Designations).

                  g. Effect of Failure to Obtain and Maintain  Effectiveness  of
Registration Statement. If the Registration Statement covering the resale of all
of the shares of Common Stock issuable upon  conversion of the Preferred  Shares
covered by such  Registration  Statement and required to be filed by the Company
pursuant  to this  Agreement  is not (i)  filed  within  45 days of the  Initial
Closing  Date or within ten days of the Put Share Notice Date as the case may be
(each,  a "Scheduled  Filing  Date"),  (ii) declared  effective by the SEC on or
before the date which is 120 days after the Initial Closing Date or on or before
90 days after the Put Share Notice Date, as the case may be (each,  a "Scheduled
Effective Date"), or (iii) if after the Registration Statement has been declared
effective  by the SEC,  other than days  during an  Allowable  Grace  Period (as
defined in Section  3(v)),  available for the sales of all such shares of Common
Stock to be made  pursuant to the  respective  Registration  Statement  (whether
because of a failure to keep the Registration  Statement effective,  to disclose
such  information  as  is  necessary  for  sales  to be  made  pursuant  to  the
Registration  Statement,  to  register  sufficient  shares  of  Common  Stock or
otherwise),  then, as partial  relief for the damages to any holder by reason of
any such delay in or reduction of its ability to sell the  underlying  shares of
Common  Stock  (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 held (which relates to a
Registration  Statement  which  was not  declared  effective  on or  before  its
Scheduled Effective Date or pursuant to which sales cannot be made) equal to the
sum of:

                           (i)      $150,  if the  Registration Statement is not
         filed by the Scheduled Filing Date;

                           (ii)     $150,  if the Registration  Statement is not
         declared  effective  by the  Scheduled Effective Date;

                                      -5-
<PAGE>


                           (iii) $5  multiplied  by the sum of (x) the number of
         days after the  Scheduled  Filing Date during  which such  Registration
         Statement is not filed with the SEC,  plus (y) the number of days after
         the Scheduled Effective Date during which the Registration Statement is
         not declared  effective by the SEC,  plus (z) the number of days (other
         than days during an Allowable  Grace  Period) that sales cannot be made
         pursuant to the Registration Statement after the Registration Statement
         has been declared effective by the SEC.

The payments to which a holder  shall be entitled  pursuant to this Section 2(g)
are referred to herein as  "Registration  Delay  Payments."  Registration  Delay
Payments  shall be paid within five business days of the earlier of (i) the last
day of the month in which such  payments were incurred or (ii) the date that the
violation  which caused such payment is cured. In the event the Company fails to
make Registration  Delay Payments in a timely manner,  such  Registration  Delay
Payments shall bear interest at the rate of 1.5% per month (prorated for partial
months) until paid in full. If the Company fails to pay the  Registration  Delay
Payments,  including any interest  thereon,  within 15 business days of the date
incurred,  then the holder entitled to such payments shall have the right at any
time, so long as the Company continues to fail to make such payments, to require
the  Company,  upon  written  notice,  to  immediately  issue,  in  lieu  of the
Registration  Delay  Payments,  including  any interest  thereon,  the number of
shares of Common Stock equal to the quotient of (X) the sum of the  Registration
Delay Payments and all interest  accrued  thereon  divided by (Y) the Conversion
Price in effect on such Conversion Date as is specified by the holder in writing
to the Company.

         3.       RELATED OBLIGATIONS.

         Whenever an Investor has requested that any  Registrable  Securities be
registered  pursuant to Section 2(b) or at such time as the Company is obligated
to file a Registration  Statement with the SEC pursuant to Section 2(a) or 2(g),
the  Company  will  use its best  efforts  to  effect  the  registration  of the
Registrable  Securities in accordance  with the intended  method of  disposition
thereof and, pursuant thereto, the Company shall have the following obligations:

                  a. The Company shall promptly  prepare and file with the SEC a
Registration Statement with respect to the Initial Registrable Securities (on or
prior to the 45th day after the Initial  Closing  Date) and with  respect to the
Put  Registrable  Securities  (on or prior to the date which is ten days after a
Put Share Notice Date) for the registration of Registrable  Securities  pursuant
to Section  2(a) and use its best efforts to cause such  Registration  Statement
relating to the Registrable  Securities to become  effective as soon as possible
after such filing (but, in the case of the Initial Registrable Securities, in no
event later than 120 days after the Initial Closing Date, in the case of the Put
Registrable  Securities  and in no event  later than 90 days after the Put Share
Notice Date), and keep such Registration  Statement  effective  pursuant to Rule
415 at all times until the earlier of (i) the date as of which the Investors may
sell all of the  Registrable  Securities  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  Registrable  Securities and (B)

                                      -6-
<PAGE>

none of the Preferred Shares is outstanding (the "Registration  Period"),  which
Registration  Statement  (including any  amendments or  supplements  thereto and
prospectuses  contained  therein)  shall not contain any untrue  statement  of a
material fact or omit to state a material fact required to be stated therein, or
necessary to make the statements therein, in light of the circumstances in which
they were made, not misleading.

                  b.  The  Company  shall  prepare  and  file  with the SEC such
amendments   (including   post-effective   amendments)   and  supplements  to  a
Registration   Statement  and  the  prospectus  used  in  connection  with  such
Registration  Statement,  which  prospectus is to be filed  pursuant to Rule 424
promulgated  under the 1933 Act, as may be necessary  to keep such  Registration
Statement  effective at all times during the  Registration  Period,  and, during
such  period,  comply with the  provisions  of the 1933 Act with  respect to the
disposition  of all  Registrable  Securities  of the  Company  covered  by  such
Registration  Statement  until such time as all of such  Registrable  Securities
shall  have  been  disposed  of in  accordance  with  the  intended  methods  of
disposition by the seller or sellers  thereof as set forth in such  Registration
Statement. In the case of amendments and supplements to a Registration Statement
which are required to be filed pursuant to this Agreement (including pursuant to
this Section 3(b)) by reason of the Company  filing a report on Form 10-K,  Form
10-Q or Form 8-K or any analogous  report under the  Securities  Exchange Act of
1934 (the "1934 Act"),  the Company shall file such  amendments  or  supplements
with the SEC on the same day on which the 1934 Act report is filed which created
the  requirement  for the  Company  to  amend  or  supplement  the  Registration
Statement.


                  c. The  Company  shall  permit  Legal  Counsel  to review  and
comment upon a Registration Statement and all amendments and supplements thereto
at least  seven (7) days prior to their  filing  with the SEC,  and not file any
document in a form to which Legal Counsel reasonably objects.  The Company shall
not submit a request for  acceleration  of the  effectiveness  of a Registration
Statement or any amendment or supplement  thereto  without the prior approval of
Legal Counsel,  which consent shall not be  unreasonably  withheld.  The Company
shall furnish to Legal Counsel,  without charge, (i) any correspondence from the
SEC or the staff of the SEC to the  Company or its  representatives  relating to
any Registration  Statement,  (ii) promptly after the same is prepared and filed
with  the SEC,  one  copy of any  Registration  Statement  and any  amendment(s)
thereto,   including   financial   statements  and   schedules,   all  documents
incorporated   therein  by  reference  and  all  exhibits  and  (iii)  upon  the
effectiveness of any Registration Statement, one copy of the prospectus included
in such Registration Statement and all amendments and supplements thereto.


                  d.  The  Company  shall   furnish  to  each   Investor   whose
Registrable  Securities  are  included in any  Registration  Statement,  without
charge, (i) promptly after the same is prepared and filed with the SEC, at least
one copy of such Registration Statement and any amendment(s) thereto,  including
financial  statements  and  schedules,  all  documents  incorporated  therein by
reference  and all  exhibits,  the  prospectus  included  in  such  Registration
Statement  (including  each  preliminary  prospectus)  and, with regards to such
Registration Statement(s),  any correspondence by or on behalf of the Company to
the SEC or the staff of the SEC and any correspondence from the SEC or the staff

                                      -7-
<PAGE>

of the SEC to the Company or its representatives, (ii) upon the effectiveness of
any Registration  Statement,  ten (10) copies of the prospectus included in such
Registration Statement and all amendments and supplements thereto (or such other
number of copies as such Investor may  reasonably  request) and (iii) such other
documents,  including  copies of any  preliminary or final  prospectus,  as such
Investor may  reasonably  request from time to time in order to  facilitate  the
disposition of the Registrable Securities owned by such Investor.

                  e. The Company  shall use its best efforts to (i) register and
qualify the  Registrable  Securities  covered by a Registration  Statement under
such other  securities  or "blue sky" laws of such  jurisdictions  in the United
States as Legal Counsel or any Investor  reasonably  requests,  (ii) prepare and
file  in  those  jurisdictions,   such  amendments   (including   post-effective
amendments) and supplements to such  registrations and  qualifications as may be
necessary to maintain the effectiveness  thereof during the Registration Period,
(iii) take such other actions as may be necessary to maintain such registrations
and  qualifications in effect at all times during the Registration  Period,  and
(iv) take all other  actions  reasonably  necessary  or advisable to qualify the
Registrable Securities for sale in such jurisdictions;  provided,  however, that
the  Company  shall not be required in  connection  therewith  or as a condition
thereto to (x)  qualify to do business  in any  jurisdiction  where it would not
otherwise be required to qualify but for this Section 3(e),  (y) subject  itself
to general taxation in any such  jurisdiction,  or (z) file a general consent to
service of process in any such  jurisdiction.  The Company shall promptly notify
Legal Counsel and each Investor who holds Registrable  Securities of the receipt
by the  Company  of any  notification  with  respect  to the  suspension  of the
registration  or  qualification  of any of the  Registrable  Securities for sale
under the securities or "blue sky" laws of any jurisdiction in the United States
or its  receipt  of  actual  notice  of the  initiation  or  threatening  of any
proceeding for such purpose.

                  f.  In  the  event  Investors  who  hold  a  majority  of  the
Registrable Securities being offered in the offering select underwriters for the
offering,  the Company  shall enter into and  perform its  obligations  under an
underwriting  agreement,  in  usual  and  customary  form,  including,   without
limitation,  customary  indemnification and contribution  obligations,  with the
underwriters of such offering.

                  g. As promptly as  practicable  after  becoming  aware of such
event,  the Company  shall notify Legal  Counsel and each Investor in writing of
the  happening  of any event as a result of which the  prospectus  included in a
Registration  Statement,  as then in effect,  includes an untrue  statement of a
material fact or omission to state a material fact required to be stated therein
or necessary to make the statements therein, in light of the circumstances under
which they were made,  not  misleading,  and promptly  prepare a  supplement  or
amendment to such  Registration  Statement  to correct such untrue  statement or
omission,  and deliver ten (10) copies of such  supplement or amendment to Legal
Counsel and each  Investor (or such other  number of copies as Legal  Counsel or
such Investor may reasonably  request).  The Company shall also promptly  notify
Legal  Counsel  and  each  Investor  in  writing  (i) when a  prospectus  or any
prospectus  supplement or  post-effective  amendment has been filed,  and when a
Registration  Statement or any  post-effective  amendment  has become  effective
(notification of such effectiveness shall be delivered to Legal Counsel and each
Investor by  facsimile  on the same day of such  effectiveness  and by overnight

                                      -8-
<PAGE>

mail),  (ii) of any  request  by the  SEC for  amendments  or  supplements  to a
Registration  Statement or related prospectus or related information,  and (iii)
of the Company's reasonable  determination that a post-effective  amendment to a
Registration Statement would be appropriate.

                  h. The  Company  shall use its best  efforts  to  prevent  the
issuance  of  any  stop  order  or  other   suspension  of  effectiveness  of  a
Registration  Statement,  or the suspension of the  qualification  of any of the
Registrable  Securities  for sale in any  jurisdiction  and, if such an order or
suspension  is issued,  to obtain the  withdrawal of such order or suspension at
the earliest  possible  moment and to notify Legal Counsel and each Investor who
holds  Registrable  Securities  being sold (and, in the event of an underwritten
offering,  the  managing  underwriters)  of the  issuance  of such order and the
resolution  thereof or its receipt of actual notice of the  initiation or threat
of any proceeding for such purpose.

                  i. At the request of any  Investor,  the Company shall furnish
to such Investor, on the date of the effectiveness of the Registration Statement
and  thereafter  from time to time on such dates as an Investor  may  reasonably
request (i) a letter, dated such date, from the Company's  independent certified
public  accountants in form and substance as is customarily given by independent
certified public accountants to underwriters in an underwritten public offering,
addressed to the  underwriters,  and (ii) an opinion,  dated as of such date, of
counsel representing the Company for purposes of such Registration Statement, in
form,  scope and substance as is  customarily  given in an  underwritten  public
offering, addressed to the Investors.

                  j. The Company shall make  available for inspection by (i) any
Buyer,  (ii)  Legal  Counsel,   (iii)  any  underwriter   participating  in  any
disposition pursuant to a Registration  Statement,  (iv) one firm of accountants
or  other  agents  retained  by the  Investors,  and (v) one  firm of  attorneys
retained by such  underwriters  (collectively,  the  "Inspectors") all pertinent
financial and other records, and pertinent corporate documents and properties of
the  Company  (collectively,  the  "Records"),  as  shall be  reasonably  deemed
necessary by each  Inspector,  and cause the Company's  officers,  directors and
employees to supply all information which any Inspector may reasonably  request;
provided,  however,  that each Inspector  shall agree to sign a  confidentiality
agreement covering the Records (in a form reasonably acceptable to the Company )
and shall hold in strict confidence and shall not make any disclosure (except to
an  Investor)  or use of any  Record  or other  information  which  the  Company
determines  in good faith to be  confidential,  and of which  determination  the
Inspectors  are so  notified,  unless  (a) the  disclosure  of such  Records  is
necessary  to avoid or correct a  misstatement  or omission in any  Registration
Statement or is otherwise  required  under the 1933 Act, (b) the release of such
Records is ordered pursuant to a final,  non-appealable subpoena or order from a
court or government  body of competent  jurisdiction,  or (c) the information in
such  Records  has been made  generally  available  to the public  other than by
disclosure  in violation of this or any other  agreement of which the  Inspector
has knowledge. Each Investor agrees that it shall, upon learning that disclosure
of such  Records is sought in or by a court or  governmental  body of  competent
jurisdiction or through other means, give prompt notice to the Company and allow
the  Company,  at its  expense,  to  undertake  appropriate  action  to  prevent
disclosure  of,  or to  obtain  a  protective  order  for,  the  Records  deemed
confidential.

                                      -9-
<PAGE>


                  k.  The  Company  shall  hold in  confidence  and not make any
disclosure of information  concerning an Investor provided to the Company unless
(i) disclosure of such  information is necessary to comply with federal or state
securities  laws, (ii) the disclosure of such  information is necessary to avoid
or correct a misstatement or omission in any Registration  Statement,  (iii) the
release of such  information  is ordered  pursuant to a subpoena or other final,
non-appealable   order  from  a  court  or   governmental   body  of   competent
jurisdiction,  or (iv) such information has been made generally available to the
public other than by  disclosure  in  violation  of this  Agreement or any other
agreement.  The Company agrees that it shall,  upon learning that  disclosure of
such  information  concerning  an  Investor  is  sought  in  or  by a  court  or
governmental body of competent  jurisdiction or through other means, give prompt
written  notice to such  Investor  and allow such  Investor,  at the  Investor's
expense, to undertake  appropriate action to prevent disclosure of, or to obtain
a protective order for, such information.

                  l. The Company shall use its best efforts  either to (i) cause
all the Registrable  Securities covered by a Registration Statement to be listed
on each  securities  exchange  on which  securities  of the same class or series
issued  by the  Company  are  then  listed,  if  any,  if the  listing  of  such
Registrable  Securities is then permitted  under the rules of such exchange,  or
(ii) secure designation and quotation of all the Registrable  Securities covered
by the  Registration  Statement  on The  Nasdaq  National  Market  and,  without
limiting the  generality  of the  foregoing,  to arrange for at least two market
makers to register with the National  Association  of Securities  Dealers,  Inc.
("NASD") as such with respect to such Registrable Securities.  The Company shall
pay all fees and expenses in connection  with  satisfying its  obligation  under
this Section 3(l).

                  m. The Company  shall  cooperate  with the  Investors who hold
Registrable Securities being offered and, to the extent applicable, any managing
underwriter or underwriters,  to facilitate the timely  preparation and delivery
of  certificates   (not  bearing  any  restrictive   legend)   representing  the
Registrable  Securities to be offered  pursuant to a Registration  Statement and
enable such certificates to be in such denominations or amounts, as the case may
be, as the  managing  underwriter  or  underwriters,  if any, or, if there is no
managing  underwriter or underwriters,  the Investors may reasonably request and
registered in such names as the managing underwriter or underwriters, if any, or
the Investors may request.

                  n. The Company shall provide a transfer agent and registrar of
all such  Registrable  Securities  not  later  than the  effective  date of such
Registration Statement.

                  o. If requested by the managing  underwriters  or an Investor,
the Company  shall (i)  immediately  incorporate  in a prospectus  supplement or
post-effective  amendment such information as the managing  underwriters and the
Investors agree should be included therein relating to the sale and distribution
of Registrable  Securities,  including,  without  limitation,  information  with
respect to the number of Registrable Securities being sold to such underwriters,
the purchase price being paid therefor by such  underwriters and any other terms
of the underwritten (or best efforts  underwritten)  offering of the Registrable
Securities to be sold in such offering;  (ii) make all required  filings of such
prospectus  supplement  or  post-effective  amendment as soon as notified of the

                                      -10-
<PAGE>

matters to be  incorporated  in such  prospectus  supplement  or  post-effective
amendment; and (iii) supplement or make amendments to any Registration Statement
if requested by a shareholder of such Registrable Securities.

                  p. The  Company  shall  use its  best  efforts  to  cause  the
Registrable  Securities covered by the applicable  Registration  Statement to be
registered with or approved by such other  governmental  agencies or authorities
as  may  be  necessary  to  consummate  the  disposition  of  such   Registrable
Securities.

                  q. The Company shall make generally  available to its security
holders as soon as practical,  but not later than 90 days after the close of the
period  covered  thereby,  an earnings  statement  (in form  complying  with the
provisions  of Rule 158 under  the 1933  Act)  covering  a  twelve-month  period
beginning  not later than the first day of the  Company's  fiscal  quarter  next
following the effective date of the Registration Statement.

                  r. The Company shall  otherwise use its best efforts to comply
with all  applicable  rules and  regulations  of the SEC in connection  with any
registration hereunder.

                  s.  Within  two  (2)  business  days  after  the  Registration
Statement which includes the Registrable  Securities is ordered effective by the
SEC, the Company shall deliver, and shall cause legal counsel for the Company to
deliver,  to the transfer agent for such Registrable  Securities (with copies to
the Investors  whose  Registrable  Securities are included in such  Registration
Statement)  confirmation  that the  Registration  Statement  has  been  declared
effective by the SEC in the form attached hereto as Exhibit A.

                  t. For each calendar quarter beginning in the quarter in which
the initial Registration Statement required to be filed pursuant to Section 2(a)
is  declared  effective  and  thereafter  so long as any  Preferred  Shares  are
outstanding,  the Company shall deliver (or cause its transfer agent to deliver)
to each Investor a written  report  notifying  the  Investors of any  occurrence
which  prohibits  the Company from issuing  Common Stock upon  conversion of the
Preferred  Shares.  The  report  shall  also  specify  (i) the  total  number of
Preferred Shares outstanding as of the end of the quarter, (ii) the total number
of shares of Common Stock issued upon all conversions of Preferred  Shares prior
to the end of the  quarter,  (iii)  the total  number of shares of Common  Stock
which are reserved for issuance upon  conversion  of the Preferred  Shares as of
the end of the  quarter,  and (iv) the total  number  of shares of Common  Stock
which may  thereafter be listed or issued by the Company upon  conversion of the
Preferred Shares before the Company would exceed the Exchange Cap (as defined in
the  Certificate  of  Designations).  The Company (or its transfer  agent) shall
deliver the report for each quarter to each  Investor  prior to the tenth day of
the  calendar  month  following  the  quarter  to which the report  relates.  In
addition,  the Company (or its  transfer  agent) shall  provide,  within 15 days
after  delivery to the Company of a written  request by an Investor,  any of the
information enumerated in clauses (i) - (iv) of this Section 3(t) as of the date
of the request.

                                      -11-
<PAGE>


                  u.  The  Company  shall  take  all  other  reasonable  actions
necessary to expedite and facilitate disposition by the Investors of Registrable
Securities pursuant to a Registration Statement.

                  v.  Notwithstanding  anything to the contrary in Section 3(g),
at any time  after  the  applicable  Registration  Statement  has been  declared
effective  by the  SEC,  the  Company  may  delay  the  disclosure  of  material
non-public  information  concerning  the Company the  disclosure of which at the
time is not, in the good faith  opinion of the Board of Directors of the Company
and its  counsel,  in the best  interest of the  Company  and, in the opinion of
counsel to the Company,  otherwise required (a "Grace Period");  provided,  that
the Company shall  promptly (i) notify the Investors in writing of the existence
of material non-public  information giving rise to a Grace Period (provided that
in each  notice the  Company  will not  disclose  the  content of such  material
non-public  information to the Investors) and the date on which the Grace Period
will begin,  and (ii) notify the  Investors  in writing of the date on which the
Grace Period ends;  and,  provided  further,  that all Grace  Periods  shall not
exceed an  aggregate of 30 days in any  consecutive  365 day period with no more
than 15 consecutive days and during any consecutive 365 day period,  there shall
be an  aggregate  of not more  than  two  Grace  Periods  (an  "Allowable  Grace
Period").  For purposes of determining  the length of a Grace Period above,  the
Grace Period shall begin on and include the date the holders  receive the notice
referred to in clause (i) and shall end on and include the later of the date the
holders  receive the notice  referred to in clause (ii) and the date referred to
in such notice.  The  provisions  of Sections  2(g) and 3(h) hereof shall not be
applicable  during the period of any Allowable Grace Period.  Upon expiration of
the Grace  Period,  the Company  shall  again be bound by the first  sentence of
Section 3(g) with  respect to the  information  giving rise thereto  unless such
material non-public information is no longer applicable. In the event there is a
Grace Period,  the Maturity Date (as defined in the Certificate of Designations)
shall be delayed by two (2) days for each day in the Grace Period as provided in
the Certificate of Designations.

         4.       OBLIGATIONS OF THE INVESTORS.

                  a. At  least  seven  (7)  business  days  prior  to the  first
anticipated  filing date of a Registration  Statement,  the Company shall notify
each Investor in writing of the information the Company  requires from each such
Investor  if such  Investor  elects to have any of such  Investor's  Registrable
Securities  included  in such  Registration  Statement.  It shall be a condition
precedent  to the  obligations  of the  Company  to  complete  the  registration
pursuant to this  Agreement  with  respect to the  Registrable  Securities  of a
particular  Investor  that such  Investor  shall  furnish  to the  Company  such
information  regarding  itself,  the  Registrable  Securities held by it and the
intended method of disposition of the Registrable Securities held by it as shall
be reasonably required to effect the registration of such Registrable Securities
and shall execute such  documents in connection  with such  registration  as the
Company may reasonably request.

                  b.  Each  Investor,  by  such  Investor's  acceptance  of  the
Registrable  Securities,  agrees to  cooperate  with the  Company as  reasonably
requested by the Company in connection  with the  preparation  and filing of any

                                      -12-
<PAGE>

Registration Statement hereunder,  unless such Investor has notified the Company
in  writing  of such  Investor's  election  to  exclude  all of such  Investor's
Registrable Securities from such Registration Statement.

                  c. In the  event any  Investor  elects  to  participate  in an
underwritten public offering pursuant to Section 2, each such Investor agrees to
enter  into and  perform  such  Investor's  obligations  under  an  underwriting
agreement, in usual and customary form, including, without limitation, customary
indemnification  and contribution  obligations  (only with respect to violations
which occur in reliance upon and in  conformity  with  information  furnished in
writing to the Company by such Investor  expressly  for use in the  Registration
Statement for such underwritten public offering),  with the managing underwriter
of such offering and take such other actions as are reasonably required in order
to expedite or facilitate the disposition of the Registrable Securities,  unless
such  Investor  notifies the Company in writing of such  Investor's  election to
exclude all of such Investor's  Registrable  Securities  from such  Registration
Statement.

                  d. Each Investor  agrees that, upon receipt of any notice from
the Company of the happening of any event of the kind  described in Section 3(h)
or the first  sentence  of 3(g),  such  Investor  will  immediately  discontinue
disposition of Registrable Securities pursuant to any Registration  Statement(s)
covering such Registrable Securities until such Investor's receipt of the copies
of the  supplemented or amended  prospectus  contemplated by Section 3(h) or the
first sentence of 3(g).  Notwithstanding  anything to the contrary,  the Company
shall cause its transfer agent to deliver unlegended shares of Common Stock to a
transferee of an Investor in  accordance  with the terms of the  Certificate  of
Designations in connection with any sale of Registrable  Securities with respect
to  which  an  Investor  has  entered  into a  contract  for  sale  prior to the
Investor's receipt of a notice from the Company of the happening of any event of
the kind  described in Section 3(h) or the first  sentence of 3(g) and for which
the Investor has not yet settled.

                  e.  No   Investor   may   participate   in  any   underwritten
registration  hereunder  unless such Investor (i) agrees to sell such Investor's
Registrable  Securities on the basis provided in any  underwriting  arrangements
approved by the Investors entitled hereunder to approve such arrangements,  (ii)
completes  and executes  all  questionnaires,  powers of attorney,  indemnities,
underwriting  agreements and other documents reasonably required under the terms
of such underwriting arrangements, and (iii) agrees to pay its pro rata share of
all underwriting discounts and commissions.


         5.       EXPENSES OF REGISTRATION.

                  All reasonable expenses, other than underwriting discounts and
commissions,   incurred   in   connection   with   registrations,   filings   or
qualifications pursuant to Sections 2 and 3, including,  without limitation, all
registration, listing and qualifications fees, printers and accounting fees, and
fees and  disbursements of counsel for the Company and fees and disbursements of
Legal Counsel,  shall be paid by the Company,  provided,  however,  the fees and
expenses of Legal  Counsel which the Company is required to pay pursuant to this
Section 5 shall not exceed, when aggregated with fees and expenses paid pursuant
to Section 4(i) of the Securities Purchase Agreement, $50,000.

                                      -13-
<PAGE>


         6.       INDEMNIFICATION.

                  In the event any  Registrable  Securities  are  included  in a
Registration Statement under this Agreement:

                  a. To the fullest  extent  permitted by law, the Company will,
and hereby does,  indemnify,  hold  harmless and defend each  Investor who holds
such  Registrable  Securities,  the directors,  officers,  partners,  employees,
agents,  representatives  of, and each Person, if any, who controls any Investor
within the meaning of the 1933 Act or the  Securities  Exchange Act of 1934,  as
amended (the "1934 Act"),  and any  underwriter (as defined in the 1933 Act) for
the Investors,  and the directors and officers of, and each Person,  if any, who
controls,  any such  underwriter  within the meaning of the 1933 Act or the 1934
Act (each,  an  "Indemnified  Person"),  against  any losses,  claims,  damages,
liabilities,  judgments,  fines,  penalties,  charges,  costs,  attorneys' fees,
amounts  paid in  settlement  or  expenses,  joint  or  several,  (collectively,
"Claims") incurred in investigating,  preparing or defending any action,  claim,
suit, inquiry,  proceeding,  investigation or appeal taken from the foregoing by
or before any court or governmental,  administrative or other regulatory agency,
body or the SEC,  whether  pending or threatened,  whether or not an indemnified
party is or may be a party thereto ("Indemnified Damages"), to which any of them
may become subject  insofar as such Claims (or actions or  proceedings,  whether
commenced or threatened, in respect thereof) arise out of or are based upon: (i)
any  untrue  statement  or alleged  untrue  statement  of a  material  fact in a
Registration Statement or any post-effective  amendment thereto or in any filing
made in connection with the  qualification  of the offering under the securities
or other "blue sky" laws of any jurisdiction in which Registrable Securities are
offered  ("Blue Sky  Filing"),  or the  omission or alleged  omission to state a
material fact required to be stated  therein or necessary to make the statements
therein not misleading, (ii) any untrue statement or alleged untrue statement of
a material  fact  contained in any  preliminary  prospectus if used prior to the
effective  date  of such  Registration  Statement,  or  contained  in the  final
prospectus  (as  amended or  supplemented,  if the Company  files any  amendment
thereof or supplement  thereto with the SEC) or the omission or alleged omission
to state  therein  any  material  fact  necessary  to make the  statements  made
therein,  in light of the circumstances  under which the statements therein were
made, not misleading, (iii) any violation or alleged violation by the Company of
the 1933 Act, the 1934 Act, any other law, including,  without  limitation,  any
state securities law, or any rule or regulation thereunder relating to the offer
or sale of the Registrable  Securities  pursuant to a Registration  Statement or
(iv) any violation of this Agreement  (the matters in the foregoing  clauses (i)
through (iv) being,  collectively,  "Violations").  The Company shall  reimburse
each  Indemnified  Person promptly as such expenses are incurred and are due and
payable,  for any legal fees or other  reasonable  expenses  incurred by them in
connection  with  investigating  or  defending  any such Claim.  Notwithstanding
anything  to  the  contrary  contained  herein,  the  indemnification  agreement
contained in this Section 6(a): (i) shall not apply to a Claim by an Indemnified
Person  arising out of or based upon a Violation  which occurs in reliance  upon
and in conformity with  information  furnished in writing to the Company by such
Indemnified  Person or underwriter for such Indemnified Person expressly for use
in connection  with the  preparation of the  Registration  Statement or any such
amendment  thereof or supplement  thereto,  if such  prospectus  was timely made

                                      -14-
<PAGE>

available  by the Company  pursuant to Section  3(d);  (ii) with  respect to any
preliminary  prospectus,  shall not inure to the benefit of any such person from
whom the person  asserting any such Claim purchased the  Registrable  Securities
that are the subject thereof (or to the benefit of any person  controlling  such
person) if the untrue  statement or omission of material  fact  contained in the
preliminary  prospectus  was  corrected  in the  prospectus,  as then amended or
supplemented,  if such  prospectus  was timely  made  available  by the  Company
pursuant to Section 3(d),  and the  Indemnified  Person was promptly  advised in
writing not to use the  incorrect  prospectus  prior to the use giving rise to a
violation and such Indemnified  Person,  notwithstanding  such advice,  used it;
(iii) shall not be  available  to the extent such Claim is based on a failure of
the  Investor  to  deliver  or to  cause to be  delivered  the  prospectus  made
available by the Company,  if such  prospectus  was timely made available by the
Company  pursuant to Section  3(d);  and (iv) shall not apply to amounts paid in
settlement of any Claim if such settlement is effected without the prior written
consent of the Company, which consent shall not be unreasonably  withheld.  Such
indemnity shall remain in full force and effect  regardless of any investigation
made by or on behalf of the Indemnified Person and shall survive the transfer or
disposition of the Registrable Securities by the Investors.

                  b. In connection with any  Registration  Statement in which an
Investor  is  participating,  each such  Investor  agrees to  severally  and not
jointly indemnify,  hold harmless and defend, to the same extent and in the same
manner as is set forth in Section 6(a), the Company, each of its directors, each
of its officers who signs the Registration  Statement,  each Person, if any, who
controls  the  Company  within  the  meaning  of the  1933  Act or the  1934 Act
(collectively and together with an Indemnified Person, an "Indemnified  Party"),
against  any  Claim  or  Indemnified  Damages  to which  any of them may  become
subject, under the 1933 Act, the 1934 Act or otherwise, insofar as such Claim or
Indemnified  Damages arise out of or are based upon any Violation,  in each case
to the extent,  and only to the extent,  that such Violation  occurs in reliance
upon and in conformity with written information furnished to the Company by such
Investor expressly for use in connection with such Registration Statement;  and,
subject  to  Section  6(d),  such  Investor  will  reimburse  any legal or other
expenses  reasonably  incurred  by  them in  connection  with  investigating  or
defending  any such  Claim;  provided,  however,  that the  indemnity  agreement
contained in this Section 6(b) and the  agreement  with respect to  contribution
contained  in Section 7 shall not apply to  amounts  paid in  settlement  of any
Claim if such  settlement is effected  without the prior written consent of such
Investor, which consent shall not be unreasonably withheld;  provided,  further,
however, that the Investor shall be liable under this Section 6(b) for only that
amount of a Claim or Indemnified  Damages as does not exceed the net proceeds to
such Investor as a result of the sale of Registrable Securities pursuant to such
Registration  Statement.  Such  indemnity  shall remain in full force and effect
regardless of any  investigation  made by or on behalf of such Indemnified Party
and shall  survive the transfer of the  Registrable  Securities by the Investors
pursuant  to Section  9.  Notwithstanding  anything  to the  contrary  contained
herein,  the  indemnification  agreement  contained  in this  Section  6(b) with
respect  to any  preliminary  prospectus  shall not inure to the  benefit of any
Indemnified Party if the untrue statement or omission of material fact contained
in the preliminary prospectus was corrected on a timely basis in the prospectus,
as then amended or supplemented.

                                      -15-
<PAGE>


                  c. The Company shall be entitled to receive  indemnities  from
underwriters,  selling brokers,  dealer managers and similar securities industry
professionals participating in any distribution,  to the same extent as provided
above,  with  respect  to  information  such  persons  so  furnished  in writing
expressly for inclusion in the Registration Statement.

                  d.  Promptly  after  receipt  by  an  Indemnified   Person  or
Indemnified  Party  under this  Section 6 of notice of the  commencement  of any
action or proceeding (including any governmental action or proceeding) involving
a Claim,  such  Indemnified  Person or  Indemnified  Party shall,  if a Claim in
respect thereof is to be made against any indemnifying  party under this Section
6,  deliver  to the  indemnifying  party a written  notice  of the  commencement
thereof, and the indemnifying party shall have the right to participate in, and,
to the  extent  the  indemnifying  party so  desires,  jointly  with  any  other
indemnifying party similarly  noticed,  to assume control of the defense thereof
with counsel mutually satisfactory to the indemnifying party and the Indemnified
Person or the Indemnified Party, as the case may be; provided,  however, that an
Indemnified  Person or Indemnified  Party shall have the right to retain its own
counsel with the fees and expenses to be paid by the indemnifying  party, if, in
the  reasonable  opinion of counsel  retained  by the  indemnifying  party,  the
representation  by such counsel of the Indemnified  Person or Indemnified  Party
and the  indemnifying  party would be  inappropriate  due to actual or potential
differing interests between such Indemnified Person or Indemnified Party and any
other party  represented by such counsel in such  proceeding.  The Company shall
pay reasonable  fees for only one separate legal counsel for the Investors,  and
such legal  counsel  shall be  selected by the  Investors  holding a majority in
interest of the Registrable Securities included in the Registration Statement to
which the Claim  relates.  The  Indemnified  Party or  Indemnified  Person shall
cooperate fully with the  indemnifying  party in connection with any negotiation
or  defense  of any such  action  or claim by the  indemnifying  party and shall
furnish to the indemnifying  party all information  reasonably  available to the
Indemnified  Party or Indemnified  Person which relates to such action or claim.
The indemnifying  party shall keep the Indemnified  Party or Indemnified  Person
fully  apprised at all times as to the status of the  defense or any  settlement
negotiations with respect thereto. No indemnifying party shall be liable for any
settlement  of any  action,  claim or  proceeding  effected  without its written
consent,  provided,  however, that the indemnifying party shall not unreasonably
withhold,  delay or condition its consent. No indemnifying party shall,  without
the consent of the Indemnified Party or Indemnified Person,  consent to entry of
any judgment or enter into any  settlement  or other  compromise  which does not
include as an unconditional term thereof the giving by the claimant or plaintiff
to such Indemnified Party or Indemnified  Person of a release from all liability
in respect to such claim or litigation.  Following  indemnification  as provided
for hereunder,  the indemnifying  party shall be subrogated to all rights of the
Indemnified Party or Indemnified Person with respect to all third parties, firms
or corporations  relating to the matter for which indemnification has been made.
The  failure  to  deliver  written  notice to the  indemnifying  party  within a
reasonable  time of the  commencement  of any such action shall not relieve such
indemnifying  party of any liability to the  Indemnified  Person or  Indemnified
Party under this Section 6, except to the extent that the indemnifying  party is
prejudiced in its ability to defend such action.

                                      -16-
<PAGE>


                  e. The  indemnification  required  by this  Section 6 shall be
made by  periodic  payments  of the  amount  thereof  during  the  course of the
investigation or defense,  as and when bills are received or Indemnified Damages
are incurred.

                  f.  The  indemnity  agreements  contained  herein  shall be in
addition to (i) any cause of action or similar right of the Indemnified Party or
Indemnified  Person  against  the  indemnifying  party or  others,  and (ii) any
liabilities the indemnifying party may be subject to pursuant to the law.

         7.       CONTRIBUTION.

                  To the extent any  indemnification by an indemnifying party is
prohibited or limited by law, the indemnifying  party agrees to make the maximum
contribution  with respect to any amounts for which it would otherwise be liable
under Section 6 to the fullest extent permitted by law; provided, however, that:
(i) no seller of Registrable  Securities guilty of fraudulent  misrepresentation
(within  the  meaning of Section  11(f) of the 1933 Act)  shall be  entitled  to
contribution  from any seller of  Registrable  Securities  who was not guilty of
fraudulent misrepresentation; and (ii) contribution by any seller of Registrable
Securities shall be limited in amount to the net amount of proceeds  received by
such seller from the sale of such Registrable Securities.

         8.       REPORTS UNDER THE 1934 ACT.

                  As long as any  Preferred  Shares  or  Registrable  Securities
remain  outstanding,  the  Company,  with  a view  to  making  available  to the
Investors the benefits of Rule 144  promulgated  under the 1933 Act or any other
similar rule or  regulation of the SEC that may at any time permit the Investors
to sell  securities  of the Company to the public  without  registration  ("Rule
144"), agrees to use its best efforts to:

                  a. make and keep public information  available, as those terms
are understood and defined in Rule 144;

                  b. file with the SEC in a timely  manner all reports and other
documents required of the Company under the 1933 Act and the 1934 Act so long as
the Company  remains  subject to such  requirements  (it being  understood  that
nothing herein shall limit the Company's  obligations  under Section 4(c) of the
Securities  Purchase  Agreement)  and the  filing  of  such  reports  and  other
documents is required for the applicable provisions of Rule 144; and

                  c.  furnish to each  Investor  so long as such  Investor  owns
Registrable  Securities,  promptly upon request,  (i) a written statement by the
Company that it has complied  with the reporting  requirements  of Rule 144, the
1933 Act and the 1934 Act,  (ii) a copy of the most recent  annual or  quarterly
report of the  Company  and such other  reports  and  documents  so filed by the
Company,  and (iii) such other  information  as may be  reasonably  requested to
permit  the  Investors  to sell such  securities  pursuant  to Rule 144  without
registration.

                                      -17-
<PAGE>


         9.       ASSIGNMENT OF REGISTRATION RIGHTS.

                  The  rights  under  this  Agreement  shall  be   automatically
assignable  by the  Investors  to any  transferee  of  all  or  any  portion  of
Registrable  Securities  if:  (i)  the  Investor  agrees  in  writing  with  the
transferee  or assignee to assign such rights,  and a copy of such  agreement is
furnished to the Company within a reasonable  time after such  assignment;  (ii)
the Company is,  within a  reasonable  time after such  transfer or  assignment,
furnished with written notice of (a) the name and address of such  transferee or
assignee,  and (b) the securities with respect to which such registration rights
are being transferred or assigned;  (iii) immediately following such transfer or
assignment  the further  disposition  of such  securities  by the  transferee or
assignee is restricted  under the 1933 Act and applicable state securities laws;
(iv) at or before the time the Company receives the written notice  contemplated
by clause (ii) of this  sentence the  transferee  or assignee  agrees in writing
with the Company to be bound by all of the provisions  contained herein; and (v)
such  transfer   shall  have  been  made  in  accordance   with  the  applicable
requirements of the Securities Purchase Agreement.

         10.      AMENDMENT OF REGISTRATION RIGHTS.

                  Provisions of this Agreement may be amended and the observance
     thereof may be waived  (either  generally or in a  particular  instance and
either  retroactively  or  prospectively),  only with the written consent of the
Company and Investors who then hold  two-thirds of the  Registrable  Securities.
Any  amendment or waiver  effected in  accordance  with this Section 10 shall be
binding upon each Investor and the Company. No such amendment shall be effective
to the extent that it applies to less than all of the holders of the Registrable
Securities.  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 this  Agreement
unless the same  consideration  also is  offered  to all of the  parties to this
Agreement.


         11.      MISCELLANEOUS.

                  a. A Person is deemed to be a holder of Registrable Securities
whenever  such  Person  owns or is  deemed  to own of  record  such  Registrable
Securities.  If  the  Company  receives  conflicting  instructions,  notices  or
elections  from  two or  more  Persons  with  respect  to the  same  Registrable
Securities,  the  Company  shall act upon the basis of  instructions,  notice or
election received from the registered owner of such Registrable Securities.

                                      -18-
<PAGE>


                  b. 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 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, New Jersey 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, New York 10017
                           Telephone: (212) 984-7832
                           Facsimile: (212) 984-7893
                           Attention: Michael D. Schwamm, Esq.


If to a Investor,  to it at the address  and  facsimile  number set forth on the
Schedule  of  Investors   attached  hereto,   with  copies  to  such  Investor's
representatives  as set forth on the  Schedule  of  Investors,  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.

                  c.  Failure of any party to exercise any right or remedy under
this  Agreement or otherwise,  or delay by a party in  exercising  such right or
remedy, shall not operate as a waiver thereof.

                                      -19-
<PAGE>


                  d. 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  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.
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. This Agreement,  the Securities  Purchase Agreement and the
Certificate of  Designations  constitute the entire  agreement among the parties
hereto  with  respect to the subject  matter  hereof and  thereof.  There are no
restrictions,  promises, warranties or undertakings,  other than those set forth
or referred to herein and  therein.  This  Agreement,  the  Securities  Purchase
Agreement and the Certificate of Designations supersede all prior agreements and
understandings  among the  parties  hereto with  respect to the  subject  matter
hereof and thereof.

                  f. Subject to the  requirements  of Section 9, this  Agreement
shall inure to the benefit of and be binding upon the permitted  successors  and
assigns of each of the parties hereto.

                  g. The  headings  in this  Agreement  are for  convenience  of
reference only and shall not limit or otherwise affect the meaning hereof.

                  h. This  Agreement may be executed in identical  counterparts,
each of which shall be deemed an original but all of which shall  constitute one
and the same  agreement.  This  Agreement,  once  executed  by a  party,  may be
delivered to the other party hereto by facsimile  transmission of a copy of this
Agreement bearing the signature of the party so delivering this Agreement.

                  i. 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

                                      -20-
<PAGE>

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.

                  j. All  consents  and other  determinations  to be made by the
Investors  pursuant to this Agreement shall be made, unless otherwise  specified
in  this  Agreement,   by  Investors  holding  a  majority  of  the  Registrable
Securities,  determined as if all of the Preferred  Shares then outstanding have
been converted into Registrable  Securities  without regard to any limitation on
conversions of Preferred Shares.

                  k. 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.

                  l. 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.

                                   * * * * * *

                                      -21-
<PAGE>




         IN WITNESS WHEREOF,  the parties have caused this  Registration  Rights
Agreement to be duly executed as of day and year first above written.

COMPANY:                              BUYERS:

IMMUNOMEDICS, INC.                    HFTP INVESTMENT LLC

                                      By:        PROMETHEAN           INVESTMENT
GROUP, By:                                          L.L.C.
Name:       Robert J. DeLuccia 
Its:        President & Chief         Its:       Investment Manager
            Executive Officer
            
                                      By:
                                      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

                                      -22-
<PAGE>


                                      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


                                      -23-
<PAGE>


                              SCHEDULE OF INVESTORS

<TABLE>

- -------------------------------------------------------------------------------------------------------------------
<C>                                 <S>                                       <S>
                                           Investor's Address                  Investor's Representatives'
Investor Name                             and Facsimile Number                Address and Facsimile Number
- -------------------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------------------


- -------------------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------------------

HFTP Investment LLC                  c/o Promethean Investment Group,          Promethean Investment Group, L.L.C.
                                     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                  Attention: James F. O'Brien, Jr.
                                     Attention: James F. O'Brien, Jr.          Facsimile: (212) 698-0505
                                     Facsimile: (212) 698-0505                 Telephone: (212) 698-0588
                                     Telephone: (212) 698-0588
                                                                               Katten Muchin & Zavis
                                                                               525 West Monroe Street, Suite 1600
                                                                               Chicago, Illinois 60661-3693
                                                                               Attention: Robert J. Brantman, Esq.
                                                                               Facsimile: (312) 902-1061
                                                                               Telephone: (312) 902-5200
- -------------------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------------------

Wingate Capital Ltd.                 Citadel Investment Group, L.L.C.          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 West Monroe Street, Suite 1600
                                                                               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.          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 West Monroe Street, Suite 1600
                                                                               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.            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

- -------------------------------------------------------------------------------------------------------------------
</TABLE>
                                      -24-
<PAGE>
<TABLE>
- -------------------------------------------------------------------------------------------------------------------
<C>                                 <S>                                       <S>

GAM Arbitrage Investments, Inc.      c/o Angelo, Gordon & Co., L.P.            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

- -------------------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------------------

AG Super Fund International          c/o Angelo, Gordon & Co., L.P.            Angelo, Gordon & Co., L.P.
Partners, 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

- -------------------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------------------

Raphael, L.P.                        c/o Angelo, Gordon & Co., L.P.            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

- -------------------------------------------------------------------------------------------------------------------
- -------------------------------------------------------------------------------------------------------------------

Ramius Fund, Ltd.                    c/o Angelo, Gordon & Co., L.P.            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

- -------------------------------------------------------------------------------------------------------------------
</TABLE>

                                      -25-
<PAGE>


                                                                       EXHIBIT A
                         FORM OF NOTICE OF EFFECTIVENESS
                            OF REGISTRATION STATEMENT



Attn:                               

                  Re:      Immunomedics, Inc.

Ladies and Gentlemen:

         We are  counsel to  Immunomedics,  Inc.,  a Delaware  corporation  (the
"Company"),  and have  represented  the Company in connection  with that certain
Securities  Purchase  Agreement (the "Purchase  Agreement")  entered into by and
among the Company and the buyers named  therein  (collectively,  the  "Holders")
pursuant  to which the  Company  issued to the  Holders  shares of its  Series F
Convertible Preferred Shares, par value $.01 per share, (the "Preferred Shares")
convertible  into shares of the Company's common stock, par value $.01 per share
(the "Common Stock").  Pursuant to the Purchase Agreement,  the Company also has
entered into a Registration Rights Agreement with the Holders (the "Registration
Rights Agreement")  pursuant to which the Company agreed, among other things, to
register  the  Registrable  Securities  (as defined in the  Registration  Rights
Agreement), including the shares of Common Stock issuable upon conversion of the
Preferred  Shares under the Securities Act of 1933, as amended (the "1933 Act").
In  connection  with the Company's  obligations  under the  Registration  Rights
Agreement, on ____________ ___, 1998, the Company filed a Registration Statement
on Form S-3 (File No. 333-_____________) (the "Registration Statement") with the
Securities  and  Exchange  Commission  (the "SEC")  relating to the  Registrable
Securities which names each of the Holders as a selling stockholder thereunder.

         In connection  with the  foregoing,  we advise you that a member of the
SEC's  staff has  advised  us by  telephone  that the SEC has  entered  an order
declaring the Registration Statement effective under the 1933 Act at [ENTER TIME
OF  EFFECTIVENESS]  on [ENTER DATE OF  EFFECTIVENESS]  and we have no knowledge,
after  telephonic  inquiry of a member of the SEC's  staff,  that any stop order
suspending its  effectiveness  has been issued or that any  proceedings for that
purpose  are  pending  before,  or  threatened  by, the SEC and the  Registrable
Securities  are  available  for  resale  under  the  1933  Act  pursuant  to the
Registration Statement.

                                                      Very truly yours,

                                                      [ISSUER'S COUNSEL]


                                                      By:
cc:      [LIST NAMES OF HOLDERS]

<PAGE>



                 IMMUNOMEDICS ANNOUNCES $12.5 MILLION FINANCING

Morris Plains, New Jersey, December 9, 1998 - Immunomedics,  Inc. (Nasdaq: IMMU)
announced  today that it has completed a $12.5 million  private  placement of 4%
Convertible  Preferred Stock. The Company,  subject to certain  conditions,  may
exercise an option for up to an additional  $7.5 million  Convertible  Preferred
Stock. This financing replaces the Company's current equity line.

"We have made a major strategic commitment to expanding product sales and to the
rapid  advancement  of  imaging  and  therapeutic  products  in our  development
pipeline,"  commented Robert J. DeLuccia,  President and Chief Executive Officer
of  Immunomedics.  "We continue to  strengthen  our U.S. and European  sales and
marketing  effort for CEA-Scan(R)  (arcitumomab)  as well as our European effort
for LeukoScan(R)  (sulesomab).  We have also initiated our planning for the U.S.
introduction  of LeukoScan  upon FDA  approval.  Accordingly,  we needed to have
access to more capital.  We believe this financing,  in addition to our expected
continued  growth in product  revenues and the potential  formation of corporate
partnerships  or  similar   arrangements,   further  strengthens  our  financial
position," he added.

The Preferred Stock may not be converted into common stock for approximately six
months after the closing date. The conversion price for the Preferred Stock will
be the lesser of 125% of the market  price six months  after the closing or 100%
of an average of the lowest  closing  bid during a specified  period  prior to a
conversion,  with certain additional  conversion  features during the first year
after issuance that are favorable to the Company.

Terms of the financing  include certain  trading and conversion  restrictions as
more fully set forth in the agreements.  Further, under certain conditions,  the
Company has the right to redeem the Preferred  Shares or require that the shares
be converted.

Immunomedics  is  a  biopharmaceutical   company  focused  on  the  development,
manufacture,   and  commercialization  of  diagnostic  imaging  and  therapeutic
products for the  detection  and  treatment of cancer and  infectious  diseases.
Integral  to these  products  are  highly  specific  monoclonal  antibodies  and
antibody fragments designed to deliver radioisotopes and chemotherapeutic agents
to tumors and sites of infection.  The Company's first product,  CEA-Scan(R) for
the detection of colorectal  cancer,  is being marketed in the United States and
Europe (approved in Canada).  The Company's second  diagnostic  imaging product,
LeukoScan(R),  is being  marketed in Europe for the  diagnosis of  osteomyelitis
(bone infection).  This product is presently under regulatory review by the U.S.
Food and Drug  Administration.  Immunomedics  also has several other  diagnostic
imaging products and two therapeutic products in clinical trials.

This  release,   in  addition  to  historical   information,   contains  certain
forward-looking  statements made pursuant to the Private  Securities  Litigation
Reform  Act  of  1995.  Such  statements  may  involve   significant  risks  and
uncertainties and actual results could differ materially from those expressed or
implied herein.  Factors that could cause such differences  include, but are not
limited to, new  product  development  (including  clinical  trials  outcome and
regulatory  requirement/actions),  competitive  risks to marketed  products  and
availability  of  financing  and  other  sources  of  capital  as well as  those
discussed in the  Company's  Annual  Report on Form 10-K for the year ended June
30, 1998.

Company  contact:  Kevin F.X.  Brophy,  VP,  Finance &  Administration  and CFO,
(973)  605-8200,  extension 185. Visit our web site at www.Immunomedics.com.
- --------------------

<PAGE>


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