UNIHOLDING CORP
8-K, 1997-02-14
MEDICAL LABORATORIES
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<PAGE>

                       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) January 31, 1997



                             UNIHOLDING CORPORATION
                ------------------------------------------------
             (Exact name of registrant as specified in its charter)


        Delaware                 0-9833            58-1443790
- -----------------------------------------------------------------
(State or other jurisdiction  (Commission        (IRS Employer
   of incorporation)          File Number)    Identification No.)



  96 Spring Street, New York, New York              10012
- -----------------------------------------------------------------
(Address of principal executive offices)         (Zip Code)


Registrant's telephone number, including area code (212) 219-9496


<PAGE>




Item 2.  Acquisition or Disposition of Assets.

     The registrant's  wholly-owned subsidiary,  Global Unilabs Clinical Trials,
Ltd., a British Virgin Islands  corporation  ("GUCT")  entered into and closed a
Master Combination  Agreement  ("Agreement")  dated as of January 31, 1997, with
NDA Clinical Trial Services,  Inc., a Delaware  corporation  ("NDA") and certain
stockholders of NDA.

     Prior to the Agreement, GUCT owned 100% of Unilabs Clinical Trials Limited,
a company incorporated in England and Wales ("UCT"),  which principally services
European and other non-U.S.  based clinical trials, and 100% of Pharmasoft S.A.,
a  Switzerland  corporation  ("Pharmasoft"),   which  performs  data  management
services for UCT and NDA.  GUCT also owned 17% of NDA.  Since  February 1, 1995,
UCT has been cooperating with NDA in providing  clinical trials testing services
to  pharmaceutical  companies  conducting  clinical  trials on a  multi-national
basis.

     Pursuant to the Agreement,  GUCT and the NDA stockholders contributed their
respective  holdings in NDA  (aggregating  100%) and GUCT  contributed  its 100%
holdings in UCT and  Pharmasoft  to a newly  formed  Delaware  corporation,  UCT
International,  Inc. ("UCTI"). GUCT also converted an aggregate of approximately
$1.9 million of debt of NDA and  approximately  UK(pound)0.3  million of debt of
UCT into equity of NDA and UCT respectively, which were then exchanged for stock
of UCTI.  Further,  GUCT contributed  approximately  $2.2 million to UCTI, which
together with the other  contributions  of stock caused GUCT's ownership in UCTI
to be approximately 70% at January 31, 1997.

     The  relative  values  of the  shares  of  NDA,  UCT  and  Pharmasoft  were
negotiated  between  GUCT,  NDA and  the NDA  stockholders.  The  conversion  of
approximately $2.75 million of stockholders' debt of NDA (including $1.9 million
of GUCT) and  approximately  UK(pound)0.3  million of debt of UCT into equity of
NDA and UCT  respectively,  which were then  exchanged for stock of UCTI and the
additional investment of approximately $2.45 million ($2.2 million from GUCT) in
UCTI were all valued at $150 per share of UCTI.

     The source of funds for the  purchase of UCTI stock by GUCT was the working
capital of the registrant. The tangible assets acquired consist of the assets of
NDA,  including  plant and  equipment  with a book  value of  approximately  $.9
million.  GUCT  intends to continue  the same use of such assets in the clinical
trials business of UCTI. 
                                       2
<PAGE>


Item 7.  Financial Statements and Exhibits.

         (a)   Financial Statements of NDA filed as part of this report:

               1.  Balance Sheets as of December 31, 1995 and December 31, 1994.

               2.  Statement of Operations for the Years Ended December 31,
                    1995 and December 31, 1994.

               3.  Statement of Cash Flows for the Years Ended December 31,
                    1995 and December 31, 1994.

               4.  Statement of Changes in Stockholder Equity (Deficit)for the
                    Years Ended December 31, 1995 and December 31, 1994.

               5.  Notes to the above-listed Financial Statements.

               6.  Report of Independent Accountants, Price Waterhouse LLP,
                    dated June 7, 1996, with respect to the above-listed
                    Financial Statements, to be filed by amendment on or before
                    April 15, 1997.

               7.  Unaudited interim Balance Sheet and Profit and Loss
                    Statement as of December 31, 1996, to be filed by amendment
                    on or before April 15, 1997.

         (b)   Pro Forma Financial Information

               Any pro forma  financial  information  that would be  required
                pursuant to Article 11 of  Regulation  S-X will be filed by
                amendment on or before April 15, 1997.

         (c)  Exhibits

              (2)  Master Combination Agreement by and among NDA Clinical Trial
                    Services, Inc. ("NDA"), Various Stockholders of NDA and
                    Global Unilabs Clinical Trials, Ltd., dated as of 
                    January 31, 1997.











                                       3

<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 hereunto duly authorized.


                                            UNIHOLDING CORPORATION
                                                 (Registrant)


Date:  February 14, 1997                    By: /s/BRUNO ADAM
                                                -------------------------------
                                                BRUNO ADAM
                                                Chief Financial Officer




                                        4
<PAGE>



















NDA Clinical Trial
Services, Inc
Financial Statements
December 31, 1995 and 1994


                                        5

<PAGE>



NDA Clinical Trial Services, Inc.

Balance Sheet

                                                             December 31,
                                                        1995             1994

Assets

Current assets
 Cash                                              $  338,021      $    713,541
 Accounts receivable                                  420,757           180,583
 Prepaid expenses and other current assets             51,577            44,576
                                                      -------           -------

         Total current assets                         810,355           938,700


Fixed assets, net (Note 4)                            684,354           351,879
Intangible assets, net (Note 3)                        79,048           129,765
Other assets                                           12,799                --
                                                     --------         ---------
                                                    1,586,556         1,420,344
                                                    =========         =========



                                        6

<PAGE>





                                                             December 31,
                                                         1995             1994
                                                     ----------       ----------

Liabilities and Stockholders' Equity

Current liabilities
  Accounts payable and accrued expenses                  702,569     $  396,212
  Loans payable to stockholders (Note 7)                 425,277        197,777
  Obligations under capital leases (Note 9)              102,370         66,761
  Deferred testing and supplies revenue                  332,662        161,049
                                                         -------        -------

         Total current liabilities                     1,562,878        821,799

Obligations under capital leases (Note 9)                153,513        154,061
Deferred testing and supplies revenue                    753,367        419,908
                                                         -------       --------
                                                       2,469,758      1,395,768

Stockholders' (deficit) equity (Note 5)
  Class A Voting Common Stock - $.01 par value;
   500,000 shares authorized, 32,425 and 20,000
   shares issued and outstanding at December 31,
   1995 and 1994;                                            324            200
  Class A Voting Common Stock subject to put
   option - 17,025 shares issued and outstanding
   at December 31, 1995 and 1994                       1,706,126      1,706,126
  Class A Non-Voting Common Stock - $.01 par
   value; 50,000 shares authorized, 2,280 shares
   issued and outstanding at December 31, 1995
   and 1994;                                                  23             23
  Additional paid-in-capital                           2,349,690        816,975
  Accumulated loss as an S Corporation                (1,628,004)    (1,628,004)
  Accumulated Deficit                                 (3,175,861)      (735,244)
  Less:
   Treasury stock - 10,000 shares of
    Class A Voting Common Stock, at cost                (135,500)      (135,500)
                                                        ---------      ---------

    Total stockholders' (deficit) equity                (883,202)        24,576
                                                        ---------       -------
                                                      $1,586,556     $1,420,344


The accompanying notes are an integral part of these financial statements.



                                        7

<PAGE>




NDA Clinical Trial Services, Inc.

Statement of Operations


                                                           Years Ended
                                                          December 31,
                                                  1995                     1994

Revenue                                         $  1,928,014        $   928,150
                                                ------------        -----------

Cost and expenses
         Cost of revenue                           1,634,176            682,608
         General and administrative                1,314,522          1,097,811
         Selling and marketing                       857,535            546,123
         Management information systems              337,239            247,210
         Depreciation and amortization               181,713             74,536
                                                     -------             ------

                                                   4,325,185          2,648,288
                                                   ---------          ---------


         Loss from operations                     (2,397,171)        (1,720,138)

         Interest expense, net                        43,446              1,692
                                                      ------          ---------

                  Net loss                       $(2,440,617)       $(1,721,830)
                                                 ============       ============











The accompanying notes are an integral part of these financial statements.




                                        8

<PAGE>




NDA Clinical Trial Services, Inc.

Statement of Cash Flows



                                                            Years Ended
                                                           December 31,
                                                     1995                1994
                                                     ----                ----
Cash flows from operating activities
   Net loss                                     $  (2,440,617)    $  (1,721,830)
   Adjustments to reconcile net
    loss to cash provided by operating
    activities:
   Depreciation and amortization                      181,713            74,536
   (Increase) decrease in operating assets
   Accounts receivable                               (240,174)         (147,139)
   Prepaids and other current
    and noncurrent assets                             (19,800)          120,024
   Increase in operating liabilities
   Accounts payable and accrued expenses              306,357           219,213
   Deferred testing and supplies revenue              505,072            10,213
                                                      -------           --------

   Net cash used in operating activities           (1,705,449)       (1,444,983)
                                                   -----------       -----------

Cash flows used in investing activities
  Fixed asset acquisitions                            (340,703)        (130,310)
                                                      ---------        ---------


Cash flows from financing activities
  Principal payments under capital lease obligation    (87,707)              -
  Proceeds from the issuance of
   Class A Voting Common Stock                       1,532,839        1,781,174
  Stockholder loans, net repayments                    227,500          347,777
                                                       -------          -------

                  Net cash provided by
                   financing activities              1,672,632        2,128,951
                                                     ---------         ---------

Net (decreases) increase in cash                      (375,520)         553,658
Cash at beginning of year                              713,541          159,883
                                                       -------          -------

Cash at end of year                                 $  338,021       $  713,541
                                                    ==========       ==========






The accompanying notes are an integral part of these financial statements.


                                        9

<PAGE>



NDA Clinical Trial Services, Inc.

Statement of Changes in Stockholder, Equity (Deficit)

<TABLE>
                                                             Years ended December 31, 1995 and 1994
<CAPTION>

                                              Class A Voting                  Class A Non-Voting
                                               Common Stock                     Common Stock
                                                              Amount
                                   Number of                 Subject to      Number              Additional paid      Accumulated
                                     Shares      Amount     put Option    of Shares    Amount      In-capital         Deficit
                                     ------      ------     ----------    ---------    ------      ----------         -------
<S>                                 <C>          <C>        <C>    <C>   <C>        <C>         <C>                 <C>

                                
Balance at January 1, 1994 ......      200       $   2             --         23      $   --     $   592,148        $  (641,418)


One hundred-for-one
 common stock split .............   19,800         198             --      2,257      $   23            (221)


Contribution of Class A Voting
 Common Stock by stockholders
 to the Company ..............      (2,955)        (29)            --         --          --              29                 --


Conversion of loans payable to
 stockholder to Class A
 Voting Common Stock ............    2,214          22             --         --          --         149,978                 --


Issuance of Shares of Class A
 Voting  Common Stock,  subject
 to put option,  for cash, net
 of related expenses of $145,478,
 paid in cash and stock .........    9,874          --      $ 854,522        --           --              --


Issuance of Class A Voting Common
 Stock for services rendered ....      741           7             --         --          --          75,041                 --


Issuance of Class A Voting Common
 Stock for cash, net of related
 expense of $17,458 .............    7,151          --      $  81,604         --          --              --                 --


Net loss ........................       --          --             --         --          --              --         (1,721,830)
                                    -------      ------     ---------    -------    --------     -----------         ----------- 


Balance at December 31, 1994 ...    37,025      $  200    $ 1,706,126      2,280    $     23     $   816,975        $(2,363,218)
                                   --------      ------   -----------    -------    --------     -----------         -----------


Issuance of Class A Voting
 Common Stock for cash, net
 of related expense of $3,250 ...    3,493      $  35             --          --         --      $   421,219                 --


Issuance of Class A Voting
 Common Stock for cash, net
 of related expenses of $74,371 .    8,932         69             --          --         --        1,111,496                --


Net loss ........................       --         --             --          --         --               --         (2,446,617)


Balance at December 31, 1995 ..     49,450      $ 324    $ 1,706,126       2,280    $    23      $ 3,349,690        $(4,803,865)
                                 =========   =========   ===========     =======    =======      ===========        ============
</TABLE>


The accompanying notes are an integral part of these financial statements.

                                       10


<PAGE>



NDA Clinical Trial Services, Inc.

Statement of Changes in Stockholder, Equity (Deficit)

(Continued)

                     Years ended December 31, 1995 and 1994

                                 
                                              Treasury Stock
                                                                  Stockholders'
                                   Number of                         Equity
                                    Shares          Amount          (Deficit)
                                    ------          ------          ---------

Balance at January 1, 1994          10,000       $ (135,500)      $ (184,768)


One hundred-for-one
 common stock split                     --               --               --


Contribution of Class A Voting
 Common Stock by stockholders
 to the Company                         --               --               --


Conversion of loans payable to
 stockholder to Class A
 Voting Common Stock                    --               --          150,000


Issuance of Shares of Class A Voting
Common Stock, subject to put option,
for cash, net of related expenses of
$145,478, paid in cash and stock        --               --               --


Issuance of Class A Voting Common
 Stock for services rendered            --               --           75,028


Issuance of Class A Voting Common
 Stock for cash, net of related
 expense of $17,458                     --               --          851,604


Net loss                                --               --       (1,721,830)
                                    -------        ---------     ------------


Balance at December 31, 1994        10,000        $ (135,500)        $24,576
                                   --------       ----------     ------------


Issuance of Class A Voting
 Common Stock for cash, net
 of related expense of $3,250           --                --         421,251


Issuance of Class A Voting
 Common Stock for cash, net
 of related expenses of $74,371         --                --       1,111,585


Net loss                                --                --      (2,440,617)


Balance at December 31, 1995     865)10,000        $ (135,500)     $(883,202)
                                 ==========        ===========     ==========










The accompanying notes are an integral part of these financial statements.

                                       11

<PAGE>



NDA Clinical Trial Services, Inc.

Notes to Financial Statements


1.       Organization and Business

         NDA Clinical Trial Services, Inc. (the "Company or NDA") was
         incorporated in April 1993 for the purpose of engaging in central
         laboratory testing for pharmaceutical, biotech and contract research
         organization.

2.       Liquidity

         The Company has incurred losses from operations since its inception and
         has an accumulated  deficit and a working  capital  deficit at December
         31,  1995.  The  Company's  ability to continue  operations  as a going
         concern  is  dependent  on its  ability  to  obtain  additional  equity
         financing in the  short-term and achieve  profitable  operations in the
         longer-term.

3.       Summary of Significant Accounting Policies

         Revenue recognition
         Revenue from the laboratory  testing is recognized  when the testing is
         performed.  Revenue from supplies is recognized ratably over the period
         of the related contract. Payments received in advance are classified in
         advance as deferred testing and supplies revenue.

         Fixed assets
         Fixed  assets  are  stated  at  cost  less  accumulated   depreciation.
         Depreciation of fixed assets is recorded on a straight-line  basis over
         their estimated useful lives of five years.  Certain leased  laboratory
         equipment with future rental payments for periods though 1999 have been
         capitalized.  These  amounts are  included in fixed  assets  within the
         accompanying  balance sheet and are being  amortized over the estimated
         useful lives of the equipment which is five years.

         Intangible asset
         Intangible  assets are stated at acquisition  cost and consist of trade
         names, covenants not to compete, customer lists and purchased software.
         Amortization  is  provided  on a straight  line basis over five  years.
         Amortization expense for the years ended December 31, 1995 and 1994 was
         $51,052  and  $50,715,   respectively.   Accumulated  amortization  was
         $113,102 and $62,050 at December 31, 1995 and 1994, respectively.

         Management estimates
         The  presentation of financial  statements in conformity with generally
         accepted  accounting  principles  requires management to make estimates
         and  assumptions  that  affect  the  reported  amounts  of  assets  and
         liabilities and disclosure of contingent  assets and liabilities at the
         date of the financial  statements and the reported  amounts of revenues
         and expenses during the reporting  period.  Actual results could differ
         from those estimates.






                                       12

<PAGE>







NDA Clinical Trial Services, Inc.

Notes to Financial Statements

         Supplemental cash flow information
         Capital lease obligations of $122,768 and $220,822 were incurred during
         the years ended  December 31, 1995 and 1994,  respectively.  Taxes paid
         were $1,269 and $325 during the years ended December 31, 1995 and 1994,
         respectively.  Interest  paid was $23,631  and $1,692  during the years
         ended December 31, 1995 and 1994, respectively. Common stock was issued
         upon the conversion of $150,000 of payables to stockholders  during the
         year ended  December 31, 1994.  Common  stock,  valued at $75,048,  was
         issued in satisfaction of certain expenses  incurred in connection with
         a stock  purchase  agreement  during the year ended  December 31, 1994.
         Common  stock,  valued at $92,150,  was issued in exchange  for certain
         intangible assets during the year ended December 31, 1994.

4.       Fixed Assets

         Fixed assets at December 31, 1995 and 1994 consist of the following


                                           1995                        1994
                                           ----                        ----

Laboratory equipment                    $ 242,933                  $  89,735
Computer equipment                        225,269                     61,795
Furniture and office equipment             28,044                      6,078
Equipment under capital leases            343,590                    228,822
                                          -------                    -------
                                          839,836                    378,430

Less - Accumulated depreciation           155,482                     26,551
                                          -------                     ------

                                        $ 684,354                  $ 351,879
                                        =========                  =========

Depreciation expense for the years ended December 31, 1995 and 1994 was $130,661
and $19,360, respectively.

5.       Stockholders' Equity

         Stock split
         On August 1, 1994,  the  stockholders  authorized  an  amendment to the
         Certificate of Incorporation which provided for a stock split on a 100-
         for-1 basis of all issued Class A Voting and Non-Voting Common Stock at
         a par value of $.01.  The par value of the new shares  issued  totalled
         $221, which was transferred from additional  paid-in-capital  to common
         stock.

                                       13

<PAGE>



NDA Clinical Trial Services, Inc.

Notes to Financial Statements


         Put option
         Certain stockholders were granted a put option, exercisable only one to
         put all or a part of their common  shares to the  Company,  at any time
         after June 2000,  at a price per common  share  equal to nine times the
         Company's  post tax  earnings  per share for the four  fiscal  quarters
         prior to the exercise of the put option.  These put options expire upon
         the successful  completion of a public offering f the securities of the
         Company in an aggregate amount in excess of $5,000,000.

         Stock option
         In  conjunction  with the sale of common stock,  the Company  issued an
         option to purchase  certain  number of shares,  at a price per share of
         $133,  which  when  added  to all  other  shares,  will  result  in the
         stockholder  owning 30% of all  outstanding  stock of the Company.  The
         option becomes  exercisable upon the issuance of the Company's December
         31, 1996 audited financial statements and expires in thirty days.

6.       Stock Option Plan

         During 1994, the Company adopted a stock option plan, which permits the
         issuance  of   incentive  or   non-qualified   stock   options,   stock
         appreciation rights, restricted stock, performance shares, loans and/or
         tax offset  payments to certain key  employees.  At December  31, 1995,
         3,300   shares  were   reserved  for  issuance  and  775  options  were
         outstanding.

7.       Related Party Transactions

         The  Company  leases  its  office and  laboratory  facilities  from NDA
         Properties,  a company  owned by a  stockholder  of the  Company.  Rent
         expense for the year ended December 31, 1995 and 1994 was approximately
         $241,646 and $180,000, respectively.

         At December 31, 1995 loans  payable to  stockholders  include  $337,500
         borrowed from  stockholders in 1995 in the form of 12% demand loans and
         $87,777 of non-interest bearing demand loans from stockholders.

8.       Income Taxes

         Effective  August 1,  1994,  the  Company's  S  Corporation  status was
         terminated.  Since such date,  the Company has  incurred  approximately
         $3,400,000  in operating  losses which are  available to offset  future
         federal taxable income through 2010.

         Cross deferred tax assets of approximately  $1,200,000 are fully offset
         by a valuation  allowance and arise  primarily  from net operating loss
         carry  forwards and  differences  in the amounts of  depreciations  and
         accruals for financial reporting purposes and income tax purposes.

                                       14

<PAGE>



NDA Clinical Trial Services, Inc.

Notes to Financial Statements


9.       Commitments

         Lease commitments
         The Company is obligated  under  capital and  operating  leases for its
         office and certain  equipment.  Future  minimum  payments under leases,
         with  initial or  remaining  terms of one year or more,  consist of the
         following at December 31, 1995:



                                              Capital                 Operating
                                              Leases                   Leases

1996                                         $ 119,962               $ 255,871
1997                                           107,895                 207,999
1998                                            30,697                 220,690
1999                                            30,697                 228,000
2000                                                 -                 240,000
                                              --------               ---------

     Total minimum lease payments            $ 289,251             $ 1,152,560
                                                                   ===========

     Less - Amounts representing interest       33,368
                                                ------
     Present value of net
       minimum lease payments                $ 255,883
                                             =========


10.      Major Customers

         Sales  to one  customer  accounted  for  approximately  58%  and 67% of
         revenues for the year ended December 31, 1995 and 1994, respectively.




                                      
                          MASTER COMBINATION AGREEMENT





                                  by and among





                       NDA CLINICAL TRIAL SERVICES, INC.,

                          VARIOUS STOCKHOLDERS OF NDA,

                                       and

                      GLOBAL UNILABS CLINICAL TRIALS, LTD.








                          Dated as of January 31, 1997








<PAGE>



                          MASTER COMBINATION AGREEMENT


         This Master Combination  Agreement dated as of January 31, 1997, by and
among:

NDA CLINICAL TRIAL SERVICES, INC. ("NDA"), a corporation organized
under the laws of the State of Delaware, with its principal place
of business at 260 Smith Street, Farmingdale, New York, 11735;

VARIOUS  STOCKHOLDERS  OF NDA ("NDA  Stockholders"),  as set  forth on  Schedule
PRE-2, not including GUCT (as defined below); and

GLOBAL UNILABS CLINICAL TRIALS, LTD. ("GUCT"), a British Virgin
Islands corporation, with its principal place of business at 207-
208 Neptune House, Marina Bay, Gibraltar.


                              W I T N E S S E T H :


         WHEREAS,  NDA, GUCT and the NDA Stockholders wish to enter into various
transactions pursuant to which:

                  (i)  Prior to the  events  set  forth in (ii),  (iii) and (iv)
below,  certain NDA Stockholders and GUCT will convert $2,755,650 of outstanding
loans to NDA into an  aggregate  of 18,371  shares of NDA Class A Voting  Common
Stock  ("NDA  Class A Stock") as set forth in Section  1.2 below,  and GUCT will
convert (pound)326,419, or its US Dollar equivalent, of outstanding loans to UCT
(as  hereinafter  defined) in exchange for 326,419 shares of UCT as set forth in
Section 1.4 below;
                  (ii) Immediately  following the events set forth in (i) above,
the NDA Stockholders and GUCT will transfer all of their  outstanding  shares of
capital stock of NDA to a newly formed holding company to be incorporated  under
the laws of Delaware  ("International")  in exchange  for the issuance of 70,101
shares of the capital stock of International, as set forth in Section 1.3 below;

                  (iii)  Simultaneously with the events set forth in (ii) above,
GUCT will  transfer all of its  outstanding  shares of Unilabs  Clinical  Trials
Limited  ("UCT"),  a company  incorporated in England and Wales  (Registered No.
2626808), with its registered office at Bewlay House, 32 Jamestown Road, Camden,
London  NW17BY,  England  and all its  outstanding  shares  of  Pharmasoft,  SA,
("Pharmasoft"), a Swiss corporation, with its principal place of business at 51,
rue des Moulins,  2000, Neuchatel,  Switzerland to International in exchange for
the  issuance of 82,597  shares of the capital  stock of  International,  as set
forth in Section 1.4 below; and


                                        1

<PAGE>




                  (iv)  Simultaneously  with the  events  set  forth in (ii) and
(iii) above,  GUCT will make a capital  contribution  aggregating  $2,203,050 in
exchange for the issuance of an aggregate of 14,687  shares of the capital stock
of International, as set forth in Section 1.5 below;

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


SECTION 1.                 PARTICIPATION IN TRANSACTION; SALE AND EXCHANGE OF
                           SECURITIES.

         Subject to the terms and  conditions  hereof,  and in reliance upon the
representations, warranties and agreements contained herein.

         1.1. Formation and Capitalization of International.  Promptly after the
date  hereof,  and prior to the  Closing  (as  defined in Section 2.1 below) the
parties  will  cooperate  to form and  establish  under the laws of  Delaware  a
corporation  to be known  as UCT  International,  Inc.  (previously  defined  as
"International").  International's  initial  authorized capital shall consist of
22,000,000 shares of common stock, $.01 par value ("International  Shares"), and
3,000,000 shares of Preferred Stock  ("International  Preferred Shares"),  to be
issued in series from time to time with such rights,  preferences and privileges
as will be determined  by the  International  Board of Directors  subject to the
terms of the  International  Stockholders'  Agreement  as defined in Section 1.6
below. The Certificate of Incorporation and By-laws of International  will be in
the forms attached hereto as Annex 1.1.

         1.2.  Conversion of NDA Loans to Equity. At the Closing and immediately
prior to the  transactions  described in Sections 1.3, 1.4 and 1.5 below,  GUCT,
Poly Ventures II, Limited  Partnership  ("Poly"),  the Long Island Venture Fund,
L.P.  ("LIVF") and David A. Deutsch  ("Deutsch")  (the latter three persons each
being NDA  Stockholders  and  parties  hereto,  which  entities  and GUCT  shall
collectively be known as the "Converting  NDA  Stockholders")  shall convert the
principal  balance and accrued but unpaid interest on their outstanding loans to
NDA to newly issued shares of NDA Class A Stock (the  "Converted NDA Shares") at
the rate of $150 of  outstanding  principal and accrued but unpaid  interest for
each  Converted NDA Share.  The principal  balance and accrued  interest on said
loans aggregate  $1,890,900 for GUCT (which includes the "Deutsch  Indebtedness"
as defined below), $580,000 for Poly, $239,750 for LIVF and $45,000 for Deutsch.
Immediately prior to said conversion,  David Deutsch,  who currently is owed the
principal amount of $411,000 plus accrued interest of $25,000 by NDA (the

                                        2

<PAGE>



"Deutsch  Indebtedness"),  will transfer his entire right, title and interest to
the Deutsch  Indebtedness  to GUCT and GUCT will pay Deutsch an amount  equal to
the Deutsch Indebtedness, against receipt of said assignment.

         1.3. Exchange of Outstanding and Converted NDA Shares for International
Shares.  At the Closing  and  immediately  after the  transaction  described  in
Section 1.2 above,  (i) the NDA  Stockholders and GUCT shall transfer and assign
to  International  all of  their  respective  shares  of  capital  stock of NDA,
representing  all  outstanding  capital  stock of NDA prior to the  transactions
contemplated  hereby  ("Outstanding NDA Shares," which term does not include the
Converted  NDA  Shares),  subject  to  Section  9.1(c);  and  (ii)  each  of the
Converting NDA Stockholders  shall transfer and assign to  International  all of
their Converted NDA Shares;  all of said shares  specified in (i) and (ii) shall
be exchanged for an aggregate of 70,101  International  Shares. Such Outstanding
NDA Shares and  Converted  NDA Shares shall be exchanged on the basis of one (1)
International  Share  for  every  one (1)  Outstanding  or  Converted  NDA Share
transferred to  International by an NDA Stockholder or GUCT. The Outstanding NDA
Shares and  Converted  NDA Shares shall not be cancelled or redeemed as a result
of said  exchange;  rather all such shares shall continue in existence as issued
and outstanding  shares of NDA and shall be owned by  International  immediately
upon and as of the Closing.

         1.4.  Conversion  of UCT Loans;  Exchange of UCT Shares and  Pharmasoft
Shares by GUCT for  International  Shares.  At the Closing and immediately after
the  transaction   described  in  Section  1.2,  and  simultaneously   with  the
transaction   described   in  Section   1.3  above,   GUCT  shall  (i)   convert
(pound)326,419  or its US Dollar  equivalent,  in loans plus accrued interest to
UCT into  326,419  additional  shares  of UCT and (ii)  transfer  and  assign to
International  2,771,547  shares of UCT (the  "UCT  Shares"),  representing  all
outstanding  capital  stock  of  UCT,  and  all of  its  shares  of  Pharmasoft,
representing  all  outstanding  capital  stock of  Pharmasoft  (the  "Pharmasoft
Shares"), in exchange for an aggregate of 82,597 shares of International,  to be
exchanged on the basis of one (1) International Share for each 34.088 UCT Shares
so  exchanged  and  2.9  International  Shares  for  each  Pharmasoft  Share  so
exchanged.  Such UCT Shares and  Pharmasoft  Shares  shall not be  cancelled  or
redeemed as a result of such  exchanges;  rather,  such shares shall continue to
exist as outstanding shares of UCT and Pharmasoft, as the case may be, and shall
be owned by International, immediately upon and as of the Closing.

         1.5.  Purchase  of  International  Shares by GUCT.  At the  Closing and
simultaneously  with the  transactions  described in Sections 1.3 and 1.4 above,
the  parties  will cause  International  to issue and sell to GUCT and GUCT will
purchase  14,687 newly issued  International  Shares (such  Shares,  and the new
Shares  described  in Section  1.6 below,  collectively  the "New  International
Shares") at

                                        3

<PAGE>



a  purchase  price of $150 per share  (the "New  International  Shares  Purchase
Price"), or a total purchase price of $2,203,050.

         1.6. Purchase of International Shares by certain NDA Stockholders.  (i)
At or prior to the  Closing,  the parties will cause  International  to offer to
sell to certain  NDA  Stockholders  identified  on Schedule  1.6  (collectively,
together with GUCT, and together with Poly and LIVF, to the extent they purchase
new  International  Shares  pursuant  to this  Section  1.6,  the  "Contributing
International  Stockholders"),  during the thirty (30) day period  following the
Closing (the "Investment Period"),  pro rata, based on the outstanding shares of
NDA common stock owned by such Stockholders immediately prior to the Closing, an
aggregate  of  1,667  newly-issued  shares  of  common  stock  of  International
(collectively,  together with the shares  referred to in Section 1.5 above,  the
"New  International  Shares"),  at a purchase  price per share  equal to the New
International Shares Purchase Price.

                  (ii) Within five days after the end of the Investment  Period,
International will notify the NDA Stockholders who have agreed to purchase their
full  allotment  of New  International  Shares  as  aforesaid  (the  "Purchasing
Stockholders")  as to the number of New  International  Shares,  if any,  not so
purchased pursuant to this Section, and such Purchasing  Stockholders shall have
the  further  right,  exercisable  at any time and from time to time  during the
thirty-five  (35) day period  following the Investment  Period,  to purchase all
remaining New International Shares, pro rata, based on the outstanding shares of
NDA common stock then owned by the Purchasing Stockholders.

                  (iii)  Within five days after the end of such  35-day  period,
International  will notify  Poly and LIVF as to the number of New  International
Shares,  if any,  not so  purchased  pursuant to Section  1.6(i) and (ii) above,
whereupon Poly and LIVF shall have the right, exercisable at any time during the
(15)  fifteen-day  period  commencing  after  receipt  of such  information,  to
purchase, pro rata, based on the outstanding shares of NDA Common Stock owned by
them  immediately  prior to the  Closing,  the balance of the New  International
Shares not so purchased  pursuant to Section  1.6(i) and (ii) above,  at the New
International  Shares Purchase Price. Poly and LIVF each shall have similar over
allotment rights to purchase the remaining  shares, if any, not purchased by the
other,  during  such 15-day  period.  Within five (5) days after the end of such
15-day  period,  International  will  notify  GUCT  as  to  the  number  of  New
International  Shares,  if any,  not so  purchased  pursuant  to  this  Section,
whereupon  GUCT shall have the right,  exercisable  at any time  during the (15)
fifteen-day period commencing after receipt of such information, to purchase the
balance  of the New  International  Shares  not so  purchased  pursuant  to this
Section, at the New International Shares Purchase Price.


                                        4

<PAGE>



         1.7. Other  Agreements to be Executed and Delivered at the Closing.  At
the Closing, immediately after the transactions described in Section 1.2 through
Section  1.6 above,  the  parties  will  execute the  following  agreements,  in
addition to any other agreements, schedules and annexes hereby contemplated:

                           (i) a  Stockholders'  Agreement  (the  "International
         Stockholders' Agreement"), in the form annexed hereto as Annex 1.71, to
         be  executed  by   International   and  all  parties  hereto  receiving
         International Shares ("International Stockholders") as specified above;

                           (ii)   a   Registration    Rights    Agreement   (the
         "International  Registration  Rights  Agreement"),  in the form annexed
         hereto  as  Annex  1.72,  to  be  executed  by  International  and  all
         International Stockholders;

                           (iii)  an  Escrow,  Indemnification  and  Arbitration
         Agreement (the "International  Escrow Agreement"),  in the form annexed
         hereto  as  Annex  1.73,  to  be  executed  by  International  and  all
         International Stockholders;

                           (iv) an  Employment  Agreement,  in the form  annexed
         hereto as Annex 1.74, to be executed by NDA, as employer, International
         and David Deutsch (the "Deutsch Employment
         Agreement");

                           (v) an  Employment  Agreement,  in the  form  annexed
         hereto as Annex 1.75, to be executed by NDA, as employer, International
         and Ronald Gambardella (the "Gambardella
         Employment Agreement");

                           (vi) an  Employment  Agreement,  in the form  annexed
         hereto as Annex 1.76, to be executed by NDA, as employer, International
         and Jeffrey Prisco (the "Prisco Employment
         Agreement");

                           (vii)  Non-Competition  Agreements,  each in the form
         annexed  hereto as Annex 1.77,  to be executed by UCT and each of Sally
         Osmond and Paul  Hokfelt  (collectively  the  "Hokfelt  Non-Competition
         Agreements"); and

                           (viii) a  Consulting  Agreement,  in the form annexed
         hereto as Annex 1.78, to be executed between NDA and GUCT, with respect
         to  the   consulting   services  of  Paul  Hokfelt   (the   "Consulting
         Agreement").

SECTION 2.                 CLOSING DATE; DELIVERIES, ETC.

         2.1.              Closing.  The Closing of the transactions specified
in Sections 1.2 through Section 1.6 above (the "Closing"), shall be
held on January __, 1997, or the first business day thereafter

                                        5

<PAGE>



following  compliance with the conditions of Closing set forth in Sections 9 and
10 hereof,  or at such later date as may be approved in writing by the  parties,
but no later than March 31,  1997 (the date and time of Closing is  referred  to
herein as the  "Closing  Date").  The  Closing  shall be held at the  offices of
Meltzer, Lippe, Goldstein,  Wolf & Schlissel,  P.C., 190 Willis Avenue, Mineola,
New York 11501,  or at such other  place as shall be  mutually  agreed to by the
parties.  Consequences  of a failure to close are  governed by Section 14 herein
and by the provisions of the International Escrow Agreement.

         2.2.              Deliveries.  At the Closing, the following
deliveries will be made by each of the parties specified in
connection with the specific transactions identified:

         A.       With respect to the Conversion of Loans to Equity as
described in Section 1.2:

                  1.       Each of the Converting NDA Stockholders will deliver
to NDA:

                           (i) an  Instrument  of  Conversion  executed  by each
                  Converting NDA Stockholder in the form annexed hereto as Annex
                  2.21 (the "Instrument of Conversion");

                      (ii)  a  Warrant  Termination  Agreement  terminating  the
                  warrants previously issued to GUCT and Poly and referred to on
                  Schedule  3.4  as  the  "Warrants  to  be  Terminated"   (this
                  agreement  to be  delivered by GUCT and Poly only) in the form
                  annexed hereto as Annex 2.21A.

                  2.       NDA will deliver to each of the Converting NDA
Stockholders:

                           (i) the Instrument of Conversion executed by NDA;

                           (ii) a stock certificate,  duly executed,  registered
                  in the name of such  stockholder,  representing  the Converted
                  NDA  Shares  required  to be  delivered  to  each  stockholder
                  pursuant to the  Instrument of Conversion  executed by NDA and
                  such stockholder.

                  3.       Deutsch will deliver to GUCT:

                           (i) an assignment of the Deutsch Indebtedness in the
                  form annexed hereto as Annex 2.22.

                  4.       GUCT will deliver to David Deutsch:

                           (i) in cash, certified check or wire transfer an
                  amount equal to the Deutsch Indebtedness.


                                        6

<PAGE>



         B.       With respect to the Exchange of Outstanding and Converted
NDA Shares for International Shares as described in Section 1.3:

                  1.       GUCT, each NDA Stockholder and each Converting NDA
Stockholder shall deliver to International:

                           (i)  a  stock  certificate   representing  each  such
                  stockholder's  ownership  of  Outstanding  and  Converted  NDA
                  Shares,  as the case may be, duly  endorsed  or with  executed
                  stock  powers   attached,   effecting  the  transfer  of  such
                  stockholder's  complete  right,  title  and  interest  in such
                  shares to International  or, in lieu thereof,  an Affidavit of
                  Lost Certificate in connection with such shares;

                           (ii) an  Instrument  of Exchange  executed by each of
                  GUCT  and  each  NDA   Stockholder  and  each  Converting  NDA
                  Stockholder, respectively, in the form annexed hereto as Annex
                  2.23 (the "NDA Instrument of Exchange").

                  2.       NDA shall deliver to GUCT:

                           (i) necessary consents of the Board of Directors and
                  stockholders of NDA to the transactions contemplated
                  herein as required by law and NDA's governing
                  instruments;

                           (ii) opinions of counsel for NDA as to various
                  matters in the forms set forth as Annex 2.24;

                           (iii) such  additional  documentation  as counsel for
                  the  parties  shall  reasonably  require to give effect to the
                  transactions contemplated hereby;

                           (iv)  copies of Non-Competition Agreements executed
                  in the favor of NDA by Messrs. Deutsch, Gambardella,
                  Prisco and Mitchell Katz, respectively; and

                           (v) any  required  consents of third  parties such as
                  regulatory  agencies,  lenders,  government  approvals,  etc.,
                  provided that non-delivery thereof by any party, after the use
                  of reasonable  efforts as provided in Section 13.10, shall not
                  give  rise to  liability  of such  party  hereunder,  provided
                  further,   however,  that  delivery  of  such  consents  shall
                  constitute conditions as provided in Section 10.

                  3.       The parties will cause International to deliver to
GUCT and each NDA Stockholder and each Converting NDA Stockholder:

                           (i) a stock certificate, duly executed, registered
                  in the name of each such stockholder, representing each

                                        7

<PAGE>



                  stockholder's  entitlement to International Shares pursuant to
                  the Instrument of Exchange  executed by International and such
                  stockholder described in this subparagraph 2.2(B);

                           (ii) the NDA Instrument of Exchange duly executed by
                  International.

         C.       With respect to the Conversion of UCT Loans and Exchange
of UCT Shares and Pharmasoft Shares by GUCT for International
Shares as described in Section 1.4:

                  1.       GUCT shall deliver to International:

                           (i) a share certificate, duly registered in the name
                  of GUCT, representing its ownership of all outstanding
                  shares of (i) UCT and (ii) Pharmasoft;

                           (ii) a Stock  Transfer  Form  executed by GUCT in the
                  form  annexed  hereto  as  Annex  2.25  (the   "UCT/Pharmasoft
                  Instrument  of  Exchange")  effecting  the  transfer of GUCT's
                  complete right, title and interest in such shares to
                  International.

                           (iii)  documents  evidencing  the  conversion  of its
                  loans and accrued interest, aggregating (pound)326,419, or its
                  US Dollar equivalent, to 326,419 additional shares of UCT.

                  2.       The parties will cause International to deliver to
GUCT:

                           (i) a stock certificate,  duly registered in the name
                  of GUCT,  representing  GUCT's  entitlement  to  International
                  Shares pursuant to the  UCT/Pharmasoft  Instrument of Exchange
                  executed by International and GUCT;

                           (ii) The UCT/Pharmasoft Instrument of Exchange
                  executed by International.


                                        8

<PAGE>



         D.       With respect to the Purchase of International Shares by
Contributing International Stockholders as described in Section 1.5
and 1.6:

                  1.       GUCT shall deliver to International, in connection
with its purchase of New International Shares on the Closing Date:

                           (i) cash, certified check or wire transfer, in the
                  amount of $2,203,050;

                           (ii) a subscription agreement executed by GUCT.

                  2. Each of the Contributing  International  Stockholders  will
deliver to International,  which delivery,  in the case of the New International
Shares as provided in Section 1.6 above, may occur after the Closing Date:

                           (i)  payment  in  cash,   certified   check  or  wire
                  transfer,  of the  New  International  Shares  Purchase  Price
                  multiplied  by the number of New  International  Shares  being
                  purchased by such Contributing International
                  Stockholders;

                           (ii) a subscription agreement executed by each of the
                  Contributing  International  Stockholders  with respect to the
                  purchase of such New International Shares in the
                  form annexed hereto as Annex 2.26.

                  3. The parties will cause  International to deliver to each of
the Contributing International Stockholders,  which delivery, in the case of the
NDA  Stockholders,  may occur after the Closing Date, as provided in Section 1.6
above:

                           (i)   a    subscription    agreement    executed   by
                  International  with  respect  to  the  purchase  of  such  New
                  International Shares in the form annexed hereto as Annex 2.26;

                           (ii) a stock certificate,  duly executed,  registered
                  in  the  name  of  such  stockholder,   representing  the  New
                  International Shares being purchased by such stockholder.

         E.       Additional deliveries to be made at Closing are as
follows:

                  1.       Each NDA Stockholder shall deliver to NDA:

                           (i) an executed waiver of preemptive rights in the
                  form annexed hereto as Annex 2.27;

                           (ii) an agreement terminating the Shareholders'
                  Agreement among NDA and its stockholders dated December

                                        9

<PAGE>



                  15, 1994, as amended, in the form annexed hereto as Annex
                  2.28 (the "Shareholders' Agreement Termination");

                           (iii)  an  agreement   terminating  the  Registration
                  Rights Agreement among NDA and its stockholders dated December
                  15, 1994, as amended, in the form annexed hereto as Annex 2.29
                  (the "Registration Rights Agreement
                  Termination");

                           (iv) the International Stockholders' Agreement, the
                  International Registration Rights Agreement and
                  International Escrow Agreement, duly executed by each
                  such NDA Stockholder;

                           (v) an  agreement,  in the form of Annex 2.30 hereto,
                  terminating,  to the extent they are parties to the  following
                  documents,  (i) the Stock Purchase  Agreement  dated August 1,
                  1994 by and among Poly, NDA and NDA's predecessor corporation,
                  NDA Clinical Trial Services, Inc., a New York corporation (the
                  "First Stock  Purchase  Agreement  Termination")  and (ii) the
                  Stock Purchase  Agreement  dated December 15, 1994 between NDA
                  and certain  NDA  stockholders  (the  "Second  Stock  Purchase
                  Agreement Termination"); and

                           (vi) such additional documentation as counsel for the
                  parties  shall  reasonably  require  to  give  effect  to  the
                  transactions contemplated hereby.

                  2.       NDA shall deliver to GUCT:

                           (i) a Termination Agreement, duly executed by NDA, in
                  the form  annexed  hereto  as  Annex  2.31  (the  "Termination
                  Agreement"),  terminating the Stock Purchase Agreement between
                  NDA  and  UniHolding   Corporation,   a  Delaware  corporation
                  ("UniHolding"), dated September 27,
                  1995;

                           (ii) the Shareholders' Agreement Termination, duly
                  executed by NDA and the NDA Stockholders;

                           (iii) the Registration Rights Agreement Termination,
                  duly executed by NDA and the NDA Stockholders;

                           (iv) the First Stock Purchase  Agreement  Termination
                  and Second Stock Purchase Agreement Termination, duly executed
                  by NDA and the NDA Stockholders parties thereto;

                           (v) a Warrant  Exchange  and  Substitution  Agreement
                  evidencing the exchange and  substitution of  International as
                  the issuer of warrants in favor of Deutsch,  Poly and LIVF, in
                  the form of Annex 2.32 hereto;

                                       10

<PAGE>




                           (vi) the Consulting Agreement, duly executed by NDA;

                           (vii) such  additional  documentation  as counsel for
                  the  parties  shall  reasonably  require to give effect to the
                  transactions contemplated hereby;

                           (viii) any required consents of third parties such as
                  regulatory  agencies,  lenders,  government  approvals,  etc.,
                  provided that non-delivery thereof by any party, after the use
                  of reasonable  efforts as provided in Section 13.10, shall not
                  give  rise to  liability  of such  party  hereunder,  provided
                  further,   however,  that  delivery  of  such  consents  shall
                  constitute conditions as provided in Section 10; and

                           (ix) A non-competition  agreement in the form annexed
                  hereto  as  Annex  2.33  (the  "Poly/LIVF   Non-   Competition
                  Agreement"),  setting forth the agreement of Poly and LIVF not
                  to invest  in  businesses  competitive  with the  business  of
                  International, duly executed by Poly and LIVF.

                  3.       NDA shall deliver the Deutsch Employment Agreement,
the Gambardella Employment Agreement and the Prisco Employment
Agreement to Messrs. Deutsch, Gambardella and Prisco, respectively.

                  4.       GUCT shall deliver to NDA and the NDA Stockholders:

                           (i) the Termination Agreement duly executed by GUCT
                  and UniHolding;

                           (ii) the Shareholders' Agreement Termination, duly
                  executed by GUCT and UniHolding;

                           (iii) the Registration Rights Agreement Termination,
                  duly executed by GUCT and UniHolding;

                           (iv) any necessary consents of the Board of Directors
                  and  stockholders  of GUCT and UniHolding to the  transactions
                  contemplated  herein as required  by law and GUCT's  governing
                  instruments;

                           (v) an opinion of counsel for GUCT and UniHolding as
                  to various matters in the form set forth on Annex 2.34;

                           (vi) a non-competition  agreement in the form annexed
                  hereto as Annex 2.35 (the "GUCT  Non-Competition  Agreement"),
                  setting forth the  agreement of GUCT and  UniHolding on behalf
                  of itself and the various entities each owns or controls,  not
                  to compete with the business of  International,  duly executed
                  by UniHolding and GUCT;


                                       11

<PAGE>



                           (vii) the Consulting Agreement, duly executed by
                  GUCT;

                           (viii) such additional  documentation  as counsel for
                  the  parties  shall  reasonably  require to give effect to the
                  transactions contemplated hereby;

                           (ix) an agreement  restricting  further assignment of
                  that certain Cooperation  Agreement between GUCT, as successor
                  in interest to  UniHolding,  and NDA,  dated February 28, 1995
                  (the "Cooperation  Agreement"),  and the License Agreement and
                  Marketing   Agreement  of  even  date  therewith,   which  are
                  appendices thereto, in the form of Annex 2.36 hereto); and

                           (x) a letter agreement executed by UCT and JS
                  Pathology, Plc. ("JSP"), an affiliate of UCT, amending
                  the Analytical Service and Support Agreements in effect
                  between UCT and JSP, in the form of Annex 2.36A hereto;
                  and

                           (xi) any required  consents of third  parties such as
                  regulatory  agencies,  lenders,  government  approvals,  etc.,
                  provided that non-delivery thereof by any party, after the use
                  of reasonable  efforts as provided in Section 13.10, shall not
                  give  rise to  liability  of such  party  hereunder,  provided
                  further,   however,  that  delivery  of  such  consents  shall
                  constitute conditions as provided in Section 9.

                  5.       GUCT shall cause UCT to deliver to NDA and NDA
Stockholders:

                           (i) necessary consents of the Board of Directors and
                  stockholders of UCT to the transactions contemplated
                  herein as required by law and UCT's governing
                  instruments;

                           (ii) an opinion of counsel for UCT as to various
                  matters in the form set forth on Annex 2.37;

                           (iii) such  additional  documentation  as counsel for
                  the  parties  shall  reasonably  require to give effect to the
                  transactions contemplated hereby; and

                           (iv) any required  consents of third  parties such as
                  regulatory  agencies,  lenders,  government  approvals,  etc.,
                  provided that non-delivery thereof by any party, after the use
                  of reasonable  efforts as provided in Section 13.10, shall not
                  give  rise to  liability  of such  party  hereunder,  provided
                  further, however, that delivery of

                                       12

<PAGE>



                  such consents shall constitute conditions as provided in
                  Section 9.

                  6.   GUCT shall cause Pharmasoft to deliver to NDA:

                           (i) necessary consents of the Board of Directors and
                  stockholders of Pharmasoft to the transactions
                  contemplated herein as required by law and Pharmasoft's
                  governing instruments;

                           (ii) an opinion of counsel for Pharmasoft as to
                  various matters in the form set forth on Annex 2.38;

                           (iii) such  additional  documentation  as counsel for
                  the  parties  shall  reasonably  require to give effect to the
                  transactions contemplated hereby; and

                           (iv) any required  consents of third  parties such as
                  regulatory  agencies,  lenders,  government  approvals,  etc.,
                  provided that non-delivery thereof by any party, after the use
                  of reasonable  efforts as provided in Section 13.10, shall not
                  give  rise to  liability  of such  party  hereunder,  provided
                  further,   however,  that  delivery  of  such  consents  shall
                  constitute conditions as provided in Section 9.

                  7.       International shall deliver:

                           (i) the International Stockholders' Agreement,
                  International Registration Rights Agreement,
                  International Escrow Agreement, Poly/LIVF Non-Competition
                  Agreement and GUCT Non-Competition Agreement, duly
                  executed by International, to all International
                  Stockholders;

                           (ii) the Deutsch, Gambardella and Prisco Employment
                  Agreements, duly executed by International, to Messrs.
                  Deutsch, Gambardella and Prisco, respectively; and

                           (iii) the Hokfelt  Non-Competition  Agreements,  duly
                  executed  by  International  and  each  of the  other  parties
                  thereto, respectively.

                  8.       Messrs. Deutsch, Gambardella and Prisco shall
deliver their respective Employment Agreements to NDA and
International.

SECTION 3.                 REPRESENTATIONS AND WARRANTIES CONCERNING NDA

         As of the  execution of this  Agreement  and at the Closing  Date,  NDA
represents and warrants to all other parties hereto that, except as set forth in
any Schedule attached hereto:

                                       13

<PAGE>




         3.1.              Organization, Qualifications and Corporate Power.

                      (a)  NDA is a corporation duly incorporated, validly
existing  and in good  standing  under the laws of the State of Delaware  and is
duly licensed or qualified to transact business as a foreign  corporation and is
in good  standing  in each  jurisdiction  in which the  nature  of the  business
transacted  by it or the  character  of the  properties  owned or  leased  by it
requires  such  licensing  or  qualification.  NDA has the  corporate  power and
authority  to own and hold its  properties  and to carry on its  business as now
conducted  and as proposed to be conducted,  to execute,  deliver and perform on
behalf of NDA this Agreement,  and all other agreements  required to be executed
by any party in connection  herewith,  and all  schedules,  exhibits and annexes
contemplated  or  required  by any  such  agreements  (hereinafter,  the  "Other
Agreements").

                      (b)        NDA does not (i) own of record or beneficially,
directly  or  indirectly,   (A)  any  shares  of  capital  stock  or  securities
convertible into capital stock of any other corporation or (B) any participating
interest  in any  partnership,  joint  venture or other  non-corporate  business
enterprise or (ii) control, directly or indirectly, any other entity.

         3.2.     Authorization of Agreements, etc.

                      (a) The execution and delivery by NDA of this
Agreement and the Other  Agreements,  the  performance by NDA of its obligations
hereunder and thereunder,  and the issuance,  sale and delivery of the Converted
NDA Shares are, or at the Closing Date will have been,  duly  authorized  by all
requisite  corporate action and will not violate any provision of law, any order
of any court or other agency of government,  the Certificate of Incorporation of
NDA or the By-laws of NDA (the "NDA Charter Documents"),  all which are attached
as  Schedule  3.2,  or  any  provision  of any  indenture,  agreement  or  other
instrument to which NDA, or its properties or assets is bound, or conflict with,
result in a breach of or constitute (with due notice or lapse of time or both) a
default under any such indenture,  agreement or other  instrument,  or result in
the  creation  or  imposition  of  any  lien,  charge,  restriction,   claim  or
encumbrance of any nature whatsoever upon any of the properties or assets of NDA
or any of its subsidiaries.

                      (b)  NDA has, or at the Closing Date will have
secured,  any required  waivers and consents from its  stockholders or any other
person in connection  with the  execution and delivery by NDA of this  Agreement
and the Other Agreements and the performance by NDA of its obligations hereunder
and thereunder,  including but not limited to, the delivery of all Converted NDA
Shares issuable to the Converting NDA Stockholders under this Agreement, free of
any preemptive  rights or right of first refusal,  of any stockholders of NDA or
any other person.

                                       14

<PAGE>




                      (c)           The Converted NDA Shares have been duly
authorized  and,  when  issued in  accordance  with this  Agreement  and the NDA
Charter Documents will be validly issued,  fully paid and nonassessable  with no
personal  liability  attaching to the ownership  thereof.  The  Outstanding  and
Converted NDA Shares are, and when  delivered to  International  at the Closing,
will be,  free  and  clear  of all  liens,  charges,  restrictions,  claims  and
encumbrances,  except as set forth in the International  Stockholders' Agreement
and International  Registration Rights Agreement.  The issuance,  sale, delivery
and  exchange of the  Converted  NDA Shares and  Outstanding  NDA Shares are not
subject to any preemptive  right of stockholders of NDA or to any right of first
refusal or other  right in favor of any person  that has not been  waived to the
extent  necessary to permit the  transactions  contemplated by this Agreement to
occur.

         3.3.     Validity.  Each of the Agreement and the Other
Agreements has been duly executed and delivered by NDA and
constitutes the legal, valid and binding obligation of NDA,
enforceable in accordance with its respective terms.

         3.4.  Capitalization.  The authorized  capital stock of NDA consists of
500,000  shares of NDA Class A Stock,  of which  49,450  shares  are  issued and
outstanding,  prior to the  issuance of the  Converted  NDA  Shares,  and 50,000
shares of Class B  Non-Voting  common stock ("NDA Class B Stock") of which 2,280
shares are issued and outstanding. In addition, options to purchase 1,157 shares
have been  granted  pursuant to the  Company's  1994 Stock  Incentive  Plan (the
"Stock Option Plan"). In addition, warrants for 3080 shares of NDA Class A Stock
have been granted, of which warrants for 1,925 shares NDA Class A Stock shall be
terminated as of the Closing Date pursuant to Section 2.2(A) hereof and warrants
for 1,155  shares of NDA Class A Stock shall be exchanged as of the Closing Date
for warrants to purchase  shares of Common Stock  pursuant to Section  2.2(E)(2)
hereof.  None of such  outstanding  warrants  have been  exercised to date.  The
stockholders  of  record  and  holders  of  subscriptions,   warrants,  options,
convertible  securities  and other rights  (contingent  or other) to purchase or
otherwise acquire equity securities of NDA and the number of shares of NDA Class
A Stock and NDA Class B Stock and the  number of such  subscriptions,  warrants,
options,  convertible securities, and other such rights held by each, are as set
forth in the attached Schedule 3.4. Except as set forth in the attached Schedule
3.4,  (i) no person  owns of record or is known to NDA to own  beneficially  any
shares  of  capital  stock  of  NDA,  (ii)  no  subscription,  warrant,  option,
convertible  security  or other  right  (contingent  or  other) to  purchase  or
otherwise  acquire  equity  securities of NDA is authorized or  outstanding  and
(iii) there is no commitment by NDA to issue  shares,  subscriptions,  warrants,
options, convertible securities or other such rights or to distribute to holders
of any of its equity securities any evidence of indebtedness or asset. Except as
set forth in the attached Schedule 3.4, NDA has no

                                       15

<PAGE>



obligation  (contingent or otherwise) to purchase,  redeem or otherwise  acquire
any of its equity  securities or any interest  therein or to pay any dividend or
make any other distribution in respect thereof. Other than (i) the Stockholders'
Agreement  being  terminated  hereby  pursuant  to the  Stockholder's  Agreement
Termination  and (ii) as set forth on Schedule  3.13  hereof,  there are, to the
best  of  NDA's  knowledge,  no  voting  trusts  or  agreements,   stockholders'
agreements,  pledge agreements,  buy-sell  agreements,  rights of first refusal,
preemptive  rights or proxies  relating to any securities of NDA (whether or not
NDA is a party thereto). All of the outstanding securities of NDA were issued in
compliance with all applicable Federal and state securities laws.

         3.5.  Financial  Statements.  NDA has  furnished  to GUCT  the  audited
balance  sheets of NDA as of  December  31, 1994 and  December  31, 1995 and the
related audited statements of income,  stockholders equity and cash flows of NDA
for the years ended  December 31, 1994 and 1995.  NDA has also furnished to GUCT
its interim  unaudited  income statement and balance sheet for the eleven months
ended November 30, 1996. Copies of all such financial statements are attached on
Schedule  3.5  hereto.  All such  financial  statements  have been  prepared  in
accordance with generally accepted accounting  principles  consistently  applied
and fairly present the consolidated  financial  position of NDA at the dates and
for the periods to which they  relate.  Since the date of the  November 30, 1996
balance  sheet,  (i)  there has been no change  in the  assets,  liabilities  or
financial  condition of NDA from that reflected in such balance sheet except for
changes in the ordinary  course of business which in the aggregate have not been
materially  adverse  and  (ii)  none  of  the  business,  prospects,   financial
condition,  operations, property or affairs of NDA has been materially adversely
affected by any  occurrence or  development,  individually  or in the aggregate,
whether or not insured against.

         3.6. Events Subsequent to the Date of the Balance Sheet. Since the date
of NDA's November 30, 1996 balance sheet, NDA has not (i) except as set forth in
the attached  Schedules 3.6 and 3.13, or pursuant to this Agreement,  issued any
stock, bond or other corporate security, (ii) borrowed any amount or incurred or
become  subject  to any  liability  (absolute,  accrued or  contingent),  except
current liabilities incurred and liabilities under contracts entered into in the
ordinary  course  of  business,  (iii)  discharged  or  satisfied  any  lien  or
encumbrance or incurred or paid any obligation or liability  (absolute,  accrued
or  contingent)  other than current  liabilities  shown on its November 30, 1996
balance sheet and current  liabilities  incurred  since the date of such balance
sheet in the ordinary  course of business,  (iv) declared or made any payment or
distribution  to  stockholders or purchased or redeemed any share of its capital
stock or other security, (v) mortgaged,  pledged or subjected to lien any of its
assets, tangible or intangible,  other than liens of current real property taxes
not yet due and payable, (vi) sold, assigned or transferred any of its

                                       16

<PAGE>



tangible assets except in the ordinary course of business, or cancelled any debt
or claim,  (vii) sold,  assigned,  transferred or granted any exclusive  license
with respect to any patent,  trademark,  trade name,  service  mark,  copyright,
trade secret or other intangible asset,  (viii) suffered any loss of property or
waived any right of substantial  value whether or not in the ordinary  course of
business,  (ix) made any change in officer  compensation  except in the ordinary
course of business  and  consistent  with past  practice,  (x) made any material
change in the manner of business or  operations  of NDA,  (xi)  entered into any
transaction   except  in  the  ordinary  course  of  business  or  as  otherwise
contemplated  hereby  or  (xii)  entered  into  any  commitment  (contingent  or
otherwise) to do any of the foregoing.

         3.7.  Litigation;  Compliance  with  Law.  NDA is not  aware of any (i)
action, suit, claim,  proceeding or investigation  pending or threatened against
or  affecting  NDA,  at law or in equity,  or before or by any  Federal,  state,
municipal or other governmental department, commission, board, bureau, agency or
instrumentality,  domestic or foreign,  (ii) arbitration  proceeding relating to
NDA  pending  under  collective  bargaining  agreements  or  otherwise  or (iii)
governmental  inquiry  pending  or, to the best of NDA's  knowledge,  threatened
against or affecting NDA (including,  without limitation,  any inquiry as to the
qualification  of NDA to hold or receive  any  license or  permit).  NDA has not
received any opinion or  memorandum  or legal  advice from legal  counsel to the
effect  that  it is  exposed,  from a  legal  standpoint,  to any  liability  or
disadvantage  which  may be  material  to  its  business,  prospects,  financial
condition,  operations,  property or affairs. NDA is not in default with respect
to any order,  writ,  injunction  or decree  known to or served  upon NDA of any
court or of any  Federal,  state,  municipal or other  governmental  department,
commission, board, bureau, agency or instrumentality, domestic or foreign. There
is no  action or suit by NDA  pending  or  threatened  against  others.  NDA has
complied  with  all  laws,  rules,  regulations  and  orders  applicable  to its
business, operations, properties, assets, products and services, and NDA has all
necessary  permits,  licenses and other  authorizations  required to conduct its
business as conducted and as proposed to be conducted. There is no existing law,
rule,  regulation  or  order,  and NDA  after  due  inquiry  is not aware of any
proposed law, rule,  regulation or order,  whether Federal or state, which would
prohibit or restrict NDA from, or otherwise  materially adversely affect NDA in,
conducting  its  business  in any  jurisdiction  in which  it is now  conducting
business or in which it proposes to conduct business.

         3.8.     Proprietary Information of Third Parties.  To the
best of NDA's knowledge, no third party has claimed or has reason
to claim that any person employed by or affiliated with NDA has (a)
violated or may be violating any of the terms or conditions of his
employment, non-competition or non-disclosure agreement with such
third party, (b) disclosed or may be disclosing or utilized or may

                                       17

<PAGE>



be utilizing any trade secret or  proprietary  information or  documentation  of
such third  party or (c)  interfered  or may be  interfering  in the  employment
relationship  between  such  third  party  and  any of  its  present  or  former
employees. No third party has requested information from NDA which suggests that
such a claim might be contemplated.  To the best of NDA's  knowledge,  no person
employed by or affiliated  with NDA has employed or proposes to employ any trade
secret or any information or  documentation  proprietary to any former employer,
and to the best of NDA's knowledge, no person employed by or affiliated with NDA
has violated any confidential  relationship  which such person may have had with
any third party, in connection with the development,  manufacture or sale of any
product  or  proposed  product  or the  development  or sale of any  service  or
proposed service of NDA, and NDA has no reason to believe there will be any such
employment or violation. To the best of NDA's knowledge,  none of the execution,
delivery  or  performance  of this  Agreement  or the Other  Agreements,  or the
carrying  on of the  business  of NDA as  officers,  employees  or agents by any
officer,  director or key employee of NDA, or the conduct or proposed conduct of
the  business  of NDA,  will  conflict  with or result in a breach of the terms,
conditions or provisions of or constitute a default under any contract, covenant
or instrument under which any such person is obligated.

         3.9.  Title to  Properties.  NDA has good and  marketable  title to its
properties  and assets  reflected on its  September  30, 1996  balance  sheet or
acquired by it since the date of said balance sheet (other than  properties  and
assets  disposed of in the  ordinary  course of business  since the date of said
balance  sheet),  and all such  properties  and  assets  are  free and  clear of
mortgages, pledges, security interests, liens, charges, claims, restrictions and
other encumbrances, except for liens for current taxes not yet due and payable.

         3.10.  Leasehold  Interests.  Except as set forth in Schedule 3.10, (i)
each lease or  agreement  to which NDA is a party  under which it is a lessee of
any property,  real or personal, is a valid and subsisting agreement without any
default of NDA  thereunder  and,  to the best of NDA's  knowledge,  without  any
default thereunder of any other party thereto; (ii) no event has occurred and is
continuing  which,  with due notice or lapse of time or both, would constitute a
default or event of default by NDA under any such lease or agreement  or, to the
best of NDA's knowledge,  by any other party thereto; and (iii) NDA's possession
of such property has not been disturbed and, to the best of NDA's knowledge,  no
claim has been  asserted  against  NDA  adverse to its rights in such  leasehold
interests.

         3.11.     Taxes.  NDA has filed all tax returns, Federal,
state, county and local, required to be filed by it, and NDA has
paid all taxes shown to be due by such returns as well as all other
taxes, assessments and governmental charges which have become due

                                       18

<PAGE>



or payable,  including,  without limitation, all taxes which NDA is obligated to
withhold from amounts owing to employees,  creditors and third parties. All such
taxes with respect to which NDA has become obligated  pursuant to elections made
by NDA in  accordance  with  generally  accepted  practice  have  been  paid and
adequate  reserves  have  been  established  for all taxes  accrued  but not yet
payable.  The Federal  income tax returns of NDA have never been  audited by the
Internal Revenue Service.  No deficiency  assessment with respect to or proposed
adjustment of NDA's Federal,  state, county or local taxes is pending or, to the
best of NDA's knowledge,  threatened.  There is no tax lien,  whether imposed by
any Federal,  state,  county or local taxing authority,  outstanding against the
assets,  properties or business of NDA. NDA is a C corporation.  Neither NDA nor
any of its  stockholders  has ever filed a consent pursuant to Section 341(f) of
the  Internal  Revenue  Code of 1986,  as  amended  (the  "Code"),  relating  to
collapsible  corporations.  As described in Schedule  3.11,  NDA's net operating
losses for Federal income tax purposes, as set forth in the financial statements
referred  to in  Section  3.5,  will be subject  to the  limitations  imposed by
Section 382 of the Code and the full amount of such net operating losses may not
be  available  to offset the taxable  income of NDA for the current  fiscal year
and, to the extent not so used,  succeeding  fiscal years.  Consummation  of the
transactions   contemplated  by  this  Agreement  or  by  any  other  agreement,
understanding or commitment (contingent or otherwise) to which NDA is a party or
by which it is  otherwise  bound  will not have the  effect  of  limiting  NDA's
ability to use such net operating losses in full to offset such taxable income.

         3.12.             Insurance.  NDA holds valid policies covering all of
the insurance required to be maintained by it under Section 12.4 of
the International Stockholders Agreement.

         3.13. Material Agreements. Except as set forth in the attached Schedule
3.13(A),  NDA is not a party to or, to the best of its knowledge otherwise bound
by, any  written or oral  contract  or  instrument  or other  restriction  which
individually  or  in  the  aggregate  could  materially  affect,   adversely  or
otherwise, the business, prospects, financial condition, operations, property or
affairs of NDA. Except as set forth in the attached Schedule 3.13(B), NDA is not
a party to or otherwise bound by any written or oral:

         (a) distributor,  dealer, manufacturer's representative or sales agency
contract or similar  agreement  which is not terminable on less than ninety (90)
days' notice without cost or other liability to NDA;

         (b) sales  contract which entitles any customer to a rebate or right of
set-off,  to return any product to NDA after acceptance  thereof or to delay the
acceptance  thereof, or which varies in any material respect from NDA's standard
form contracts;

                                       19

<PAGE>




         (c)      contract with any labor union (and, to the knowledge of
NDA, no organizational effort is being made with respect to any of
its employees);

         (d)  contract or other  commitment  with any  supplier  containing  any
provision  permitting any party other than NDA to renegotiate the price or other
terms,  or  containing  any  pay-back  or  other  similar  provision,  upon  the
occurrence of a failure by NDA to meet its  obligations  under the contract when
due or the occurrence of any other event;

         (e)      contract for the future purchase of fixed assets or for
the future purchase of materials, supplies or equipment in excess
of its normal operating requirements;

         (f)  contract  for the  employment  of any  officer,  employee or other
person  (whether  of a  legally  binding  nature or in the  nature  of  informal
understandings)  on a full-time or consulting  basis which is not  terminable on
notice  without  cost  or  other  liability  to  NDA,  except  normal  severance
arrangements and accrued vacation pay;

         (g)  bonus,  pension,  profit-sharing,   retirement,   hospitalization,
insurance, stock purchase, stock option or other plan, contract or understanding
pursuant to which benefits are provided to any employee of NDA (other than group
insurance plans applicable to employees generally);

         (h)      agreement or indenture relating to the borrowing of money
or to the mortgaging or pledging of, or otherwise placing a lien or
security interest on, any asset of NDA;

         (i)      guaranty of any obligation for borrowed money or
otherwise;

         (j)  voting  trust  or  agreement,   stockholders   agreement,   pledge
agreement,  buy-sell  agreement or first refusal or preemptive  rights agreement
relating to any securities of NDA, except for the agreements being terminated by
the  Stockholders'  Agreement  Termination,  First  and  Second  Stock  Purchase
Termination and the
Termination Agreement;

         (k) agreement,  or group of related  agreements  with the same party or
any group of  affiliated  parties,  under  which NDA has  advanced  or agreed to
advance money or has agreed to lease any property as lessee or lessor;

         (l) agreement or obligation (contingent or otherwise) to issue, sell or
otherwise  distribute or to repurchase or otherwise  acquire or retire any share
of its capital stock or any of its other equity securities;


                                       20

<PAGE>



         (m)      assignment, license or other agreement with respect to
any form of intangible property;

         (n)      agreement under which it has granted any person any
registration rights, other than the agreement being terminated by
the Registration Rights Agreement Termination;

         (o)      agreement under which it has limited or restricted its
right to compete with any person in any respect;

         (p) other  contract or group of related  contracts  with the same party
involving more than $10,000 or continuing  over a period of more than six months
from the date or dates thereof (including  renewals or extensions  optional with
another  party),  which  contract or group of contracts is not terminable by NDA
without  penalty  upon notice of thirty  (30) days or less,  but  excluding  any
contract or group of  contracts  with a customer  of NDA for the sale,  lease or
rental of NDA's  products or services if such contract or group of contracts was
entered into by NDA in the ordinary course of business; or

         (q) other contract, instrument, commitment, plan or arrangement, a copy
of which  would  be  required  to be filed  with  the  Securities  and  Exchange
Commission (the "Commission") as an exhibit to a registration  statement on Form
S-1 if NDA were  registering  securities  under the  Securities  Act of 1933, as
amended (the "Securities Act").

NDA has in all  material  respects  performed  all  obligations  required  to be
performed by it to date, has received no notice of default and is not in default
(with  due  notice  or lapse of time or both)  under  any  lease,  agreement  or
contract  now in effect  to which NDA is a party or by which it or its  property
may  be  bound.  NDA  has no  present  expectation  or  intention  of not  fully
performing  all its  obligations  under  each  such  lease,  contract  or  other
agreement,  and NDA has no knowledge of any breach or anticipated  breach of the
other party to any  contract or  commitment  to which NDA is a party.  NDA is in
full  compliance  with all of the terms and  provisions  of its  Certificate  of
Incorporation and By-laws, as amended.

         3.14.  Patents,  Trademarks,  etc. Set forth as Schedule 3.14 is a list
and brief  description  of all  patents,  patent  rights,  patent  applications,
trademarks,  trademark  applications,  service marks, service mark applications,
trade  names and  copyrights,  and all  applications  for such  which are in the
process of being  prepared,  owned by or  registered  in the name of NDA,  or of
which NDA is a licensor or  licensee or in which NDA has any right,  and in each
case a brief  description  of the nature of such  right.  NDA owns or  possesses
adequate  licenses  or other  rights to use all  patents,  patent  applications,
trademarks,  trademark  applications,  service marks, service mark applications,
trade names, copyrights,  manufacturing  processes,  formulae, trade secrets and
know-how

                                       21

<PAGE>



(collectively, "Intellectual Property") necessary or desirable to the conduct of
its  business as  conducted  and as proposed  to be  conducted,  and no claim is
pending or, to the best of NDA's  knowledge,  threatened  to the effect that the
operations  of NDA infringe  upon or conflict  with the  asserted  rights of any
other person under any Intellectual Property, and there is no basis for any such
claim (whether or not pending or threatened). To the best of NDA's knowledge, no
claim is pending or threatened to the effect that any such Intellectual Property
owned or  licensed  by NDA,  or which NDA  otherwise  has the  right to use,  is
invalid  or  unenforceable  by NDA,  and  there is no basis  for any such  claim
(whether  or not pending or  threatened).  To the best of NDA's  knowledge,  all
technical  information  developed  by and  belonging  to NDA  which has not been
patented  has been kept  confidential.  NDA has not  granted or  assigned to any
other person or entity any right to manufacture, have manufactured,  assemble or
sell the  products or proposed  products or to provide the  services or proposed
services of NDA, except to UniHolding and its related companies, pursuant to the
Cooperation   Agreement   and   related   agreements   referred  to  in  Section
2.2(E)(4)(ix).

         3.15. Loans and Advances. Other than as set forth on Schedule 3.15, NDA
does  not have  any  outstanding  loans or  advances  to any  person  and is not
obligated to make any such loans or advances, except, in each case, for advances
to employees of NDA in respect of  reimbursable  business  expenses  incurred by
them in connection with their performance of services for NDA, not in excess, in
the case of each such employee, of $5,000.

         3.16.             Assumptions, Guaranties, etc. of Indebtedness of
Other Persons.  NDA has not assumed, guaranteed, endorsed or
otherwise become directly or contingently liable on any
indebtedness of any other person (including, without limitation,
liability by way of agreement, contingent or otherwise, to
purchase, to provide funds for payment, to supply funds to or
otherwise invest in a debtor, or otherwise to assure a creditor
against loss), except for guaranties by endorsement of negotiable
instruments for deposit or collection in the ordinary course of
business.

         3.17.  Significant  Customers  and  Suppliers.  No customer or supplier
which  was  significant  to NDA  during  the  period  covered  by the  financial
statements  referred  to in  Section  3.5 or which has been  significant  to NDA
thereafter,  has  terminated,  materially  reduced or threatened to terminate or
materially  reduce its  purchases  from or  provision of products or services to
NDA, as the case may be.

         3.18.             Governmental Approvals.  Subject to the accuracy of
the representations and warranties of the Converting NDA
Stockholders set forth in Section 8, no registration or filing
with, or consent or approval of or other action by, any Federal,

                                       22

<PAGE>



state or other  governmental  agency or  instrumentality is or will be necessary
for (i) the valid  execution,  delivery and performance by NDA of this Agreement
and the Other Agreements;  (ii) the issuance, sale and delivery of the Converted
NDA  Shares to the  Converting  NDA  Stockholders;  and (iii) the  delivery  and
exchange  with  International  of the  Outstanding  NDA Shares and Converted NDA
Shares,  other  than  required  filings,  if any,  pursuant  to Federal or state
securities  laws in  connection  with the  issuance,  sale and  delivery  of the
Converted NDA Shares, and the delivery and exchange of Outstanding and Converted
NDA Shares for International Shares.

         3.19. Disclosure.  Neither this Agreement, nor any Schedule or Annex to
this  Agreement  or the Other  Agreements,  contains  an untrue  statement  of a
material  fact or  omits a  material  fact  necessary  to  make  the  statements
contained herein or therein not misleading.  None of the statements,  documents,
certificates  or other items  prepared  or  supplied by NDA with  respect to the
transactions contemplated hereby contains an untrue statement of a material fact
or omits a material fact necessary to make the statements  contained therein not
misleading. There is no fact which NDA has not disclosed to GUCT and its counsel
in writing and of which NDA is aware which  materially and adversely  affects or
could  materially  and  adversely  affect  the  business,  prospects,  financial
condition, operations, property or affairs of NDA.

         3.20. Offering of the Shares.  Neither NDA nor any person acting on its
behalf has taken or will take any other action (including,  without  limitation,
any offer,  issuance or sale of any  security of NDA under  circumstances  which
might require the  integration  of such security with other NDA Class A Stock or
Class B Stock  under the  Securities  Act or the rules  and  regulations  of the
Commission  thereunder),  in  either  case so as to  subject  (i) the  offering,
issuance or sale of the Converted NDA Shares;  or (ii) the delivery and exchange
with  International of the Outstanding NDA Shares or Converted NDA Shares to the
registration provisions of the Securities Act.

         3.21.             Brokers.  NDA has no contract, arrangement or
understanding with any broker, finder or similar agent with respect
to the transactions contemplated by this Agreement.

         3.22.  Officers.  Set forth in Schedule  3.22 is a list of the names of
the officers of NDA, together with the title or job  classification of each such
person and the total compensation  anticipated to be paid to each such person by
NDA in 1996. None of such persons has an employment  agreement or understanding,
whether  oral or written,  with NDA,  which is not  terminable  on notice by NDA
without cost or other liability to NDA.

         3.23.             Transactions With Affiliates.  Except as set forth
in Schedule 3.23, no director, officer, employee or stockholder of
NDA, or member of the family of any such person, or any

                                       23

<PAGE>



corporation, partnership, trust or other entity in which any such person, or any
member of the family of any such  person,  has a  substantial  interest or is an
officer, director, trustee, partner or holder of more than 5% of the outstanding
capital stock thereof,  is a party to any  transaction  with NDA,  including any
contract,  agreement  or other  arrangement  providing  for the  employment  of,
furnishing of services by, rental of real or personal property from or otherwise
requiring payments to any such person or firm.

         3.24.  Employees.  Each of the  officers of NDA,  each key employee and
each  other  employee  now  employed  by NDA  who  has  access  to  confidential
information of NDA has executed an Employee Non- Disclosure, Non-Competition and
Development  Agreement  substantially  in the form of  Schedule  3.24,  and such
agreements  are in full force and effect.  No officer or key employee of NDA has
advised NDA (orally or in writing) that he intends to terminate  employment with
NDA. NDA has complied in all material respects with all applicable laws relating
to the employment of labor, including provisions relating to wages, hours, equal
opportunity,  collective bargaining and the payment of Social Security and other
taxes, and with the Employee Retirement Income Security Act of 1974, as amended.

         3.25.             Updating.  NDA agrees and undertakes to update the
representations and schedules herein for any changes between the
execution hereof and the Closing.

SECTION 4.                 REPRESENTATIONS AND WARRANTIES CONCERNING GUCT

         As of the execution of this  Agreement  and at the Closing  Date,  GUCT
represents  and  warrants to NDA and the NDA  Stockholders  that,  except as set
forth in any Schedule attached hereto:

         4.1.     Organization, Qualifications and Corporate Power.

                      (a)  GUCT is a corporation duly incorporated, validly
existing and in good standing  under the laws of the British  Virgin Islands and
is duly licensed or qualified to transact business as a foreign  corporation and
is in good  standing in each  jurisdiction  in which the nature of the  business
transacted  by it or the  character  of the  properties  owned or  leased  by it
requires  such  licensing or  qualification.  GUCT has the  corporate  power and
authority  to own and hold its  properties  and to carry on its  business as now
conducted and as proposed to be conducted,  and to execute,  deliver and perform
this Agreement and the Other Agreements.

                      (b)           Except for the ownership of 100% of the
outstanding capital stock of UCT and Pharmasoft, and except for its ownership of
8,932 shares of NDA Class A Stock and its  previously  specified  portion of the
Converted NDA Shares and except for the New International Shares to be issued to
GUCT at the Closing,  GUCT does not (i) own of record or beneficially,  directly
or indirectly,

                                       24

<PAGE>



(A) any shares of capital stock or securities  convertible into capital stock of
any other  corporation  or (B) any  participating  interest in any  partnership,
joint  venture  or other  non-corporate  business  enterprise  or (ii)  control,
directly or indirectly, any other entity.

         4.2.     Authorization of Agreements, etc.

                      (a) The execution and delivery by GUCT of this
Agreement and the Other  Agreements,  the performance by GUCT of its obligations
hereunder and thereunder, the exchange and delivery by GUCT of its Converted and
Outstanding   NDA  shares  and  the  UCT   Shares  and   Pharmasoft   Shares  to
International,  have been duly authorized by all requisite  corporate action and
will not violate any provision of law, any order of any court or other agency of
government,  the  Memorandum  and  Articles  of  Association  of GUCT (the "GUCT
Charter Documents"), which are attached as Schedule 4.2, or any provision of any
indenture,  agreement or other  instrument to which GUCT,  or its  properties or
assets is bound, or conflict with, result in a breach of or constitute (with due
notice or lapse of time or both) a default under any such  indenture,  agreement
or other  instrument,  or  result in the  creation  or  imposition  of any lien,
charge,  restriction,  claim or encumbrance of any nature whatsoever upon any of
the properties or assets of GUCT or any of its subsidiaries.

                      (b)  GUCT has secured any required waivers and
consents from its  shareholders in connection with the execution and delivery by
GUCT of this Agreement and the Other  Agreements and the  performance by GUCT of
its  obligations  hereunder  and  thereunder,  including but not limited to, the
delivery of all its Outstanding NDA Shares, Converted NDA Shares, UCT Shares and
Pharmasoft  Shares to International  under this Agreement free of any preemptive
rights and right of first refusal of any person.

                      (c)           The UCT Shares, Pharmasoft Shares, Converted
and Outstanding NDA Shares being  delivered by GUCT to  International  have been
duly  authorized,  and when delivered to  International  in accordance with this
Agreement, will be validly issued, fully paid and nonassessable with no personal
liability   attaching  to  the   ownership   thereof  and,   will  be  owned  by
International,  free and clear of all liens, charges,  restrictions,  claims and
encumbrances except as set forth in the International Stockholders Agreement and
the International  Registration  Rights Agreement.  The delivery and exchange of
such  shares to  International  is not  subject to any  preemptive  right of any
person or to any right of first  refusal  or other  right in favor of any person
that has not,  on or  prior to the  Closing  Date,  been  waived  to the  extent
necessary to permit the transactions contemplated by this Agreement to occur.

         4.3.     Validity.  Each of the Agreement and the Other
Agreements have been duly executed and delivered by GUCT and

                                       25

<PAGE>



constitutes  the legal,  valid and binding  obligation of GUCT,  enforceable  in
accordance with its terms.

         4.4.  Authorized  Capital.  The authorized  capital of GUCT consists of
20,000,000  shares of U.S.  $1.00 par  value,  of which  217,000  are issued and
outstanding  and are owned of  record  and  beneficially  by  UniHolding  or its
affiliates,  including  its  officers and  directors.  Schedule 4.4 sets forth a
complete and accurate description of (i) any holders of subscriptions, warrants,
options,  convertible  securities  and  other  rights  (contingent  or other) to
purchase or otherwise acquire equity securities of GUCT and the number of shares
of GUCT and the number of such  subscriptions,  warrants,  options,  convertible
securities,  and other such rights held by each; (ii) any obligation (contingent
or  otherwise)  to  purchase,  redeem or  otherwise  acquire  any of its  equity
securities  or any  interest  therein or to pay any  dividend  or make any other
distribution  in  respect  thereof;  (iii)  any  voting  trusts  or  agreements,
shareholders'  agreements,  pledge agreements,  buy-sell  agreements,  rights of
first refusal,  preemptive  rights or proxies relating to any securities of GUCT
(whether or not GUCT is a party thereto).  All of the outstanding  securities of
GUCT were issued in compliance with all applicable corporate and securities laws
of the British Virgin Islands.

         4.5.  Financial  Statements.  GUCT  has  furnished  to NDA  and the NDA
Stockholders  the  unaudited  balance sheet of GUCT as of September 30, 1996 and
the related statements of income, shareholders equity and cash flows of GUCT for
the four months then ended. Copies of such financial  statements are attached as
Schedule  4.5  hereto.  All such  financial  statements  have been  prepared  in
accordance with generally accepted accounting  principles  consistently  applied
and fairly present the consolidated  financial position of GUCT at the dates and
for the periods to which they relate.  Since the date of the  September 30, 1996
balance  sheet,  (i)  there has been no change  in the  assets,  liabilities  or
financial condition of GUCT from that reflected in such balance sheet except for
changes in the ordinary  course of business which in the aggregate have not been
materially  adverse  and  (ii)  none  of  the  business,  prospects,   financial
condition, operations, property or affairs of GUCT has been materially adversely
affected by any  occurrence or  development,  individually  or in the aggregate,
whether or not insured against.

         4.6.      INTENTIONALLY OMITTED

         4.7.  Litigation;  Compliance  with  Law.  GUCT is not aware of any (i)
action, suit, claim,  proceeding or investigation  pending or threatened against
or affecting  GUCT,  at law or in equity,  or before or by any  Federal,  state,
municipal or other governmental department, commission, board, bureau, agency or
instrumentality,  domestic or foreign,  (ii) arbitration  proceeding relating to
GUCT or (iii) governmental inquiry pending or, to the best of GUCT's

                                       26

<PAGE>



knowledge,  threatened  against or  affecting  GUCT.  GUCT has not  received any
opinion or  memorandum  or legal advice from legal counsel to the effect that it
is exposed, from a legal standpoint,  to any liability or disadvantage which may
be  material  to  its  business,  prospects,  financial  condition,  operations,
property or affairs.  GUCT is not in default  with  respect to any order,  writ,
injunction  or  decree  known  to or  served  upon  GUCT of any  court or of any
Federal, state, municipal or other governmental department,  commission,  board,
bureau,  agency or instrumentality,  domestic or foreign.  There is no action or
suit by GUCT pending or threatened  against  others.  GUCT has complied with all
laws,  rules,  regulations  and orders  applicable to its business,  operations,
properties,  assets,  products and services, and GUCT has all necessary permits,
licenses and other authorizations  required to conduct its business as conducted
and as proposed to be conducted, other than any non-compliance,  permit, license
or other  authorization which in the aggregate are not material to its business,
prospects or financial condition.  There is no existing law, rule, regulation or
order,  and GUCT  after due  inquiry  is not aware of any  proposed  law,  rule,
regulation or order,  whether of any country or political  subdivision  thereof,
including the United States or any state,  which would prohibit or restrict GUCT
from, or otherwise  materially adversely affect GUCT in, conducting its business
in any  jurisdiction  in  which  it is now  conducting  business  or in which it
proposes to conduct business.

         4.8.              INTENTIONALLY OMITTED

         4.9.              INTENTIONALLY OMITTED

         4.10.             INTENTIONALLY OMITTED

         4.11.             INTENTIONALLY OMITTED

         4.12.             INTENTIONALLY OMITTED

         4.13. Other  Agreements.  Except as set forth in the attached  Schedule
4.13(A),  GUCT is not a party  to or  otherwise  bound  by any  written  or oral
contract  or  instrument  or  other  restriction  which  individually  or in the
aggregate could materially adversely affect the business,  prospects,  financial
condition,  operations,  property or affairs of GUCT. Except as set forth in the
attached  Schedule  4.13(B),  GUCT is not a party to or  otherwise  bound by any
written or oral:

         (a)  voting  trust  or  agreement,   shareholders   agreement,   pledge
agreement,  buy-sell  agreement or first refusal or preemptive  rights agreement
relating to any securities of GUCT;

         (b)      agreement, or group of related agreements with the same
party or any group of affiliated parties, under which GUCT has

                                       27

<PAGE>



advanced or agreed to advance money or has agreed to lease any
property as lessee or lessor;

         (c)      agreement or obligation (contingent or otherwise) to
issue, sell or otherwise distribute or to repurchase or otherwise
acquire or retire any of its shares or any of its other equity
securities; and

         (d)  agreement  under which it has limited or  restricted  its right to
compete  with any  person in any  respect,  other  than as  provided  in Section
2.2(E)(4)(ix).

GUCT, and to the best of GUCT's  knowledge,  UCT, have in all material  respects
performed  all  obligations  required  to be  performed  by them to  date,  have
received no notice of default  and are not in default  (with due notice or lapse
of time or both) under any lease,  agreement  or contract now in effect to which
GUCT is a party or by which it or its property may be bound. GUCT has no present
expectation or intention of not fully performing all its obligations  under each
such lease, contract or other agreement, and GUCT has no knowledge of any breach
or anticipated  breach of the other party to any contract or commitment to which
GUCT is a party. GUCT is in full compliance with all of the terms and provisions
of the GUCT Charter Documents.

         4.14.  Governmental  Approvals.  No  registration  or filing  with,  or
consent  or  approval  of or  other  action  by,  any  Federal,  state  or other
governmental  agency or  instrumentality  is or will be necessary  for the valid
execution,  delivery and  performance  by GUCT of this  Agreement  and the Other
Agreements,  and the delivery and exchange by GUCT of its  Converted NDA Shares,
Outstanding  NDA  Shares,   UCT  Shares  and  Pharmasoft   Shares  to  and  with
International.

         4.15. Disclosure.  Neither this Agreement, nor any Schedule or Annex to
this Agreement or the Other Agreements,  contains an untrue statement concerning
GUCT,  UCT or Pharmasoft  of a material fact or omits a material fact  necessary
concerning  these companies to make the statements  contained  herein or therein
not misleading. None of the statements,  documents,  certificates or other items
prepared  or  supplied  by GUCT with  respect to the  transactions  contemplated
hereby contains an untrue  statement of a material fact or omits a material fact
necessary to make the statements  contained therein not misleading.  There is no
fact which GUCT has not disclosed to NDA and its counsel in writing and of which
GUCT is aware which  materially  and adversely  affects or could  materially and
adversely  affect the  business,  prospects,  financial  condition,  operations,
property or affairs of GUCT.

         4.16.             Offering of GUCT Shares.  Neither GUCT nor any
person acting on its behalf has taken or will take any other action
(including, without limitation, any offer, issuance or sale of any
security of GUCT under circumstances which might require the

                                       28

<PAGE>



integration  of  such  security  with  other  of  GUCT's  securities  under  the
Securities Act or the rules and  regulations of the Commission  thereunder),  in
either  case  so as to  subject  any of the  delivery  or  the  exchange  of the
Converted  NDA  Shares,  the  Outstanding  NDA  Shares,  the UCT  Shares and the
Pharmasoft  Shares,  to  International,  to the  registration  provisions of the
Securities Act.

         4.17.             Brokers.  GUCT has no contract, arrangement or
understanding with any broker, finder or similar agent with respect
to the transactions contemplated by this Agreement.

         4.18.             Updating.  GUCT agrees and undertakes to update the
representations and schedules herein for any changes between the
execution hereof and the Closing.


SECTION 5.                 REPRESENTATIONS AND WARRANTIES CONCERNING UCT

         As of the execution of this  Agreement  and at the Closing  Date,  GUCT
represents  and warrants to NDA and the NDA  Stockholders  (it being  understood
that UCT is not a party hereto and makes no representations or warranties in its
own right), that, except as set forth in any Schedule attached hereto:


         5.1.              Organization, Qualifications and Corporate Power.

                      (a)  UCT is a corporation duly incorporated, validly
existing  and in good  standing  under the laws of England and Wales and is duly
licensed or qualified to transact  business as a foreign  corporation  and is in
good  standing  in  each  jurisdiction  in  which  the  nature  of the  business
transacted  by it or the  character  of the  properties  owned or  leased  by it
requires  such  licensing  or  qualification.  UCT has the  corporate  power and
authority  to own and hold its  properties  and to carry on its  business as now
conducted and as proposed to be conducted.

                      (b)        UCT does not (i) own of record or beneficially,
directly  or  indirectly,   (A)  any  shares  of  capital  stock  or  securities
convertible into capital stock of any other corporation or (B) any participating
interest  in any  partnership,  joint  venture or other  non-corporate  business
enterprise or (ii) control, directly or indirectly, any other entity.

         5.2.     Authorization of Delivery of Shares, etc.

                      (a) The delivery and exchange of the UCT Shares to
International  have been duly authorized by all requisite  corporate  action and
will not violate any provision of law, any order of any court or other agency of
government,  the  Memorandum or Articles of Association of UCT (the "UCT Charter
Documents"),  which are  attached  as  Schedule  5.2,  or any  provision  of any
agreement or

                                       29

<PAGE>



other instrument to which UCT, or its properties or assets is bound, or conflict
with,  result in a breach of or constitute  (with due notice or lapse of time or
both) a default under any such agreement or other  instrument,  or result in the
creation or imposition of any lien, charge, restriction, claim or encumbrance of
any nature  whatsoever upon any of the properties or assets of UCT or any of its
subsidiaries.

                      (b)  UCT has secured any required waivers and
consents from its stockholders in connection with the delivery of the UCT Shares
to be exchanged for shares of  International  under this Agreement,  free of any
preemptive  rights or rights of first refusal of any stockholders of UCT and any
other person.

                      (c)        The UCT Shares have been duly authorized, and
when  delivered to  International  in accordance  with this  Agreement,  will be
validly  issued  and fully  paid with no  personal  liability  attaching  to the
ownership  thereof,  and will be, owned by International,  free and clear of all
liens, charges, restrictions, claims and encumbrances, subject to the provisions
of the Articles of Association and English Law. The exchange and delivery of the
UCT Shares to  International  is not subject to any  preemptive  right or to any
right of first  refusal of  stockholders  of UCT or other  right in favor of any
person  that  has  not  been  waived  to the  extent  necessary  to  permit  the
transactions contemplated by this Agreement to occur.

         5.3.  Authorized  Share Capital.  The  authorized  share capital of UCT
consists of 2,445,128  shares of (pound)1.00 par value,  all of which are issued
and  outstanding  (prior to the conversion of loans from GUCT to UCT referred to
in Section  1.4 hereof) and are owned  beneficially  and of record by GUCT.  The
registered  shareholders  and  holders  of  subscriptions,   warrants,  options,
convertible  securities  and other rights  (contingent  or other) to purchase or
otherwise acquire equity securities of UCT and the number of such subscriptions,
warrants,  options,  convertible securities, and other such rights held by each,
are as set  forth in the  attached  Schedule  5.3.  Except  as set  forth in the
attached  Schedule  5.3, (i) no person is  registered or is known to GUCT to own
beneficially  any  Ordinary  Shares  or any  other  securities  of UCT,  (ii) no
subscription,  warrant, option,  convertible security or other right (contingent
or  other)  to  purchase  or  otherwise  acquire  equity  securities  of  UCT is
authorized  or  outstanding  and (iii)  there is no  commitment  by UCT to issue
shares,  subscriptions,  warrants, options, convertible securities or other such
rights or to distribute to holders of any of its equity  securities any evidence
of indebtedness or asset. Except as provided for in the UCT Charter Documents or
as set forth in the attached Schedule 5.3, UCT has no obligation  (contingent or
otherwise) to purchase, redeem or otherwise acquire any of its equity securities
or any interest therein or to pay any dividend or make any other distribution in
respect thereof. Other than as set forth on Schedule 5.13 hereof,

                                       30

<PAGE>



there are,  to the best of GUCT's  knowledge,  no voting  trusts or  agreements,
stockholders'  agreements,  pledge agreements,  buy-sell  agreements,  rights of
first refusal,  preemptive  rights or proxies  relating to any securities of UCT
(whether or not UCT is a party thereto).  All of the  outstanding  securities of
UCT were issued in  compliance  with all  applicable  English laws and any other
applicable securities laws.

         5.4.  Financial  Statements.  GUCT  has  furnished  to NDA  and the NDA
Stockholders the audited balance sheet of UCT as of May 31, 1996 and the related
statements of income, shareholder funds and cash flows of UCT for the year ended
May 31, 1996.  GUCT has also furnished to NDA and the NDA  Stockholders  (i) its
interim unaudited profit and loss account, cash flow statement and balance sheet
for the six months ended November 30, 1996 and (ii) the pro-forma adjustments to
such  financial  statements  giving  effect  to  transactions  between  UCT  and
affiliates of UCT which GUCT further  represents  and warrants shall be effected
on or prior to the Closing  Date (the  "Pro-Forma  Adjustments").  Copies of all
such  financial  statements  are  attached  as  Schedule  5.4  hereto.  All such
financial  statements have been prepared in accordance  with generally  accepted
accounting  principles  consistently applied and fairly present the consolidated
financial position of UCT at the dates and for the periods to which they relate.
Since the date of November 30, 1996 balance sheet,  (i) there has been no change
in the assets,  liabilities or financial condition of UCT from that reflected in
such balance sheet except for the Pro-Forma  Adjustments  and for changes in the
ordinary  course of business  which in the  aggregate  have not been  materially
adverse  and  (ii)  none  of  the  business,  prospects,   financial  condition,
operations,  property or affairs of UCT have been materially  adversely affected
by any occurrence or development,  individually or in the aggregate,  whether or
not insured against.

         5.5. Events Subsequent to the Date of the Balance Sheet. Since the date
of  November  30,  1996  balance  sheet,  UCT has not except as set forth in the
attached  Schedule  5.5 or in the Pro- Forma  Adjustments  or  pursuant  to this
Agreement,  (i) issued any share, loan stock or other corporate  security,  (ii)
borrowed any amount or incurred or become  subject to any  liability  (absolute,
accrued or  contingent),  except current  liabilities  incurred and  liabilities
under  contracts  entered  into  in  the  ordinary  course  of  business,  (iii)
discharged  or  satisfied  any  lien or  encumbrance  or  incurred  or paid  any
obligation or liability  (absolute,  accrued or  contingent)  other than current
liabilities shown on the November 30, 1996 balance sheet and current liabilities
incurred  since  the  date of such  balance  sheet  in the  ordinary  course  of
business,  (iv) declared or made any payment or  distribution to stockholders or
purchased  or  redeemed  any  share  or loan  capital  or  other  security,  (v)
mortgaged,  pledged  or  subjected  to  lien  any of  its  assets,  tangible  or
intangible, (vi) sold, assigned or transferred any of its tangible assets except
in the ordinary course of business, or

                                       31

<PAGE>



cancelled any debt or claim,  (vii) sold,  assigned,  transferred or granted any
exclusive  license with respect to any patent,  trademark,  trade name,  service
mark,  copyright,  trade secret or other intangible  asset,  (viii) suffered any
loss of property or waived any right of substantial  value whether or not in the
ordinary course of business, (ix) made any change in officer compensation except
in the ordinary course of business and consistent  with past practice,  (x) made
any material change in the manner of business or operations of UCT, (xi) entered
into any  transaction  except in the ordinary course of business or as otherwise
contemplated  hereby  or  (xii)  entered  into  any  commitment  (contingent  or
otherwise) to do any of the foregoing.

         5.6.  Litigation;  Compliance with Law. Except as set forth on Schedule
5.6  hereto,  neither  GUCT  nor UCT is aware of any (i)  action,  suit,  claim,
proceeding or investigation  pending or threatened  against or affecting UCT, at
law or in  equity,  or  before  or by any  country,  state,  municipal  or other
governmental department,  commission,  board, bureau, agency or instrumentality,
domestic or foreign,  (ii) arbitration  proceeding relating to UCT pending under
collective  bargaining  agreements  or otherwise or (iii)  governmental  inquiry
pending or, to the best of UCT's knowledge,  threatened against or affecting UCT
(including,  without  limitation,  any inquiry as to the qualification of UCT to
hold or receive  any  license or permit).  UCT has not  received  any opinion or
memorandum  or legal advice from legal counsel to the effect that it is exposed,
from a legal standpoint,  to any liability or disadvantage which may be material
to  its  business,  prospects,  financial  condition,  operations,  property  or
affairs.  UCT is not in default with respect to any order,  writ,  injunction or
decree  known to or  served  upon UCT of any  court  or of any  country,  state,
municipal or other governmental department, commission, board, bureau, agency or
instrumentality,  domestic or foreign. There is no action or suit by UCT pending
or threatened against others. UCT has complied with all laws, rules, regulations
and orders applicable to its business, operations,  properties, assets, products
and  services,   and  UCT  has  all  necessary   permits,   licenses  and  other
authorizations  required to conduct its business as conducted and as proposed to
be conducted. There is no existing law, rule, regulation or order, and UCT after
due inquiry is not aware of any proposed law, rule, regulation or order, whether
of any country or political subdivision thereof,  including the United States or
any state,  which would  prohibit or restrict UCT from, or otherwise  materially
adversely affect UCT in, conducting its business in any jurisdiction in which it
is now conducting business or in which it proposes to conduct business.

         5.7.     Proprietary Information of Third Parties.  To the
best of GUCT's and UCT's knowledge, no third party has claimed or
has reason to claim that any person employed by or affiliated with
UCT has (a) violated or may be violating any of the terms or
conditions of his employment, non-competition or non-disclosure

                                       32

<PAGE>



agreement with such third party,  (b) disclosed or may be disclosing or utilized
or may be utilizing any trade secret or proprietary information or documentation
of such third party or (c)  interfered or may be  interfering  in the employment
relationship  between  such  third  party  and  any of  its  present  or  former
employees. No third party has requested information from UCT which suggests that
such a claim might be  contemplated.  To the best of GUCT's and UCT's knowledge,
no person  employed by or affiliated with UCT has employed or proposes to employ
any trade secret or any information or  documentation  proprietary to any former
employer,  and  to the  best  of  UCT's  knowledge,  no  person  employed  by or
affiliated with UCT has violated any confidential relationship which such person
may  have had  with  any  third  party,  in  connection  with  the  development,
manufacture  or sale of any product or proposed  product or the  development  or
sale of any service or proposed service of UCT, and UCT has no reason to believe
there will be any such employment or violation.  To the best of GUCT's and UCT's
knowledge, neither the carrying on of the business of UCT as officers, employees
or agents by any  officer,  director or key  employee of UCT, nor the conduct or
proposed  conduct of the  business  of UCT,  will  conflict  with or result in a
breach of the terms,  conditions  or provisions of or constitute a default under
any contract, covenant or instrument under which any such person is obligated.

         5.8.  Title to  Properties.  UCT has good and  marketable  title to its
properties  and assets  reflected on its  September  30, 1996  balance  sheet or
acquired by it since the date of said balance sheet (other than  properties  and
assets  disposed of in the  ordinary  course of business  since the date of said
balance  sheet),  and all such  properties  and  assets  are  free and  clear of
mortgages, pledges, security interests, liens, charges, claims, restrictions and
other  encumbrances,  except  for  liens  for or  current  taxes not yet due and
payable.

         5.9.  Leasehold  Interests.  Except as set forth in Schedule  5.12, (i)
each lease or  agreement  to which UCT is a party  under which it is a lessee of
any property,  real or personal, is a valid and subsisting agreement without any
default  of UCT  thereunder  and,  to the best of GUCT's  and  UCT's  knowledge,
without any default  thereunder  of any other party  thereto;  (ii) no event has
occurred  and is  continuing  which,  with due  notice or lapse of time or both,
would  constitute  a default  or event of default by UCT under any such lease or
agreement  or, to the best of GUCT's  and UCT's  knowledge,  by any other  party
thereto; and (iii) UCT's possession of such property has not been disturbed and,
to the best of GUCT's and UCT's  knowledge,  no claim has been asserted  against
UCT adverse to its rights in such leasehold interests.

         5.10.     Insurance.  UCT holds valid policies covering all of
the insurance required to be maintained by it under Section 12.4 of
the International Stockholders' Agreement.

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<PAGE>




         5.11.  Taxes.  Except as set forth on Schedule  5.11, UCT has filed all
tax  returns  required to be filed by it, and UCT has paid all taxes shown to be
due by such returns by the due date[s] as well as all other  taxes,  assessments
and governmental  charges which have become due or payable,  including,  without
limitation,  all taxes which UCT is obligated to withhold  from amounts owing to
employees, creditors and third parties. All such taxes with respect to which UCT
has become  obligated  pursuant  to  elections  made by UCT in  accordance  with
generally  accepted  practice  have been paid and  adequate  reserves  have been
established for all taxes accrued but not yet payable. The income tax returns of
UCT have never been audited by Inland  Revenue.  No deficiency  assessment  with
respect to or proposed  adjustment  of UCT's taxes is pending or, to the best of
UCT's  knowledge,  threatened.  There is no tax  lien  outstanding  against  the
assets,  properties or business of UCT. UCT's net trading losses for corporation
tax purposes,  as set forth in the financial  statements  referred to in Section
5.5, are not subject to any  limitations and the full amount of such net trading
losses are  available to offset the trading  profits of UCT (so long as they are
derived  from the same trade as the net trading  losses) for the current  fiscal
year and, to the extent not so used,  succeeding  fiscal years.  Consummation of
the  transactions  contemplated  by this  Agreement  or by any other  agreement,
understanding or commitment (contingent or otherwise) to which UCT is a party or
by which it is  otherwise  bound  will not have the  effect  of  limiting  UCT's
ability to use such net operating  losses in full to offset such taxable income.
UCT is not a party to any tax allocation or sharing agreement. UCT does not have
any liability or obligation,  existing or contingent, as guarantor,  transferee,
successor or otherwise, by contract or otherwise,  for the federal, state, local
or foreign taxes,  assessments  and  governmental  charges  payable by any other
entity or person in any jurisdiction, including without limitation any member of
a "consolidated group" of which UCT may be deemed to have been a part.

         5.12. Other  Agreements.  Except as set forth in the attached  Schedule
5.12(A),  UCT is not a  party  to or  otherwise  bound  by any  written  or oral
contract  or  instrument  or  other  restriction  which  individually  or in the
aggregate could materially adversely affect the business,  prospects,  financial
condition,  operations,  property or affairs of UCT.  Except as set forth in the
attached  Schedule  5.12(B),  UCT is not a party  to or  otherwise  bound by any
written or oral:

         (a) distributor,  dealer, manufacturer's representative or sales agency
contract or similar  agreement  which is not terminable on less than ninety (90)
days' notice without cost or other liability to UCT;

         (b)      sales contract which entitles any customer to a rebate or
right of set-off, to return any product to UCT after acceptance

                                       34

<PAGE>



thereof or to delay the acceptance thereof, or which varies in any
material respect from UCT's standard form contracts;

         (c)      contract with any trade union (and, to the knowledge of
UCT, no organizational effort is being made with respect to any of
its employees);

         (d)  contract or other  commitment  with any  supplier  containing  any
provision  permitting any party other than UCT to renegotiate the price or other
terms,  or  containing  any  pay-back  or  other  similar  provision,  upon  the
occurrence of a failure by UCT to meet its  obligations  under the contract when
due or the occurrence of any other event;

         (e)      contract for the future purchase of fixed assets or for
the future purchase of materials, supplies or equipment in excess
of its normal operating requirements;

         (f)  contract  for the  employment  of any  officer,  employee or other
person  (whether  of a  legally  binding  nature or in the  nature  of  informal
understandings)  on a full-time or consulting  basis which is not  terminable on
notice  without  cost  or  other  liability  to  UCT,  except  normal  severance
arrangements and accrued vacation pay;

         (g)  bonus,  pension,   profit-sharing,   retirement,  private  medical
insurance, stock purchase, stock option or other plan, contract or understanding
pursuant to which benefits are provided to any employee of UCT (other than group
insurance plans applicable to employees generally);

         (h)      agreement relating to the borrowing of money or to the
mortgaging or pledging of, or otherwise placing a lien or security
interest on, any asset of UCT;

         (i)      guaranty of any obligation for borrowed money or
otherwise;

         (j)  voting  trust  or  agreement,   stockholders   agreement,   pledge
agreement,  buy-sell  agreement or first refusal or preemptive  rights agreement
relating to any securities of UCT;

         (k) agreement,  or group of related  agreements  with the same party or
any group of  affiliated  parties,  under  which UCT has  advanced  or agreed to
advance money or has agreed to lease any property as lessee or lessor;

         (l) agreement or obligation (contingent or otherwise) to issue, sell or
otherwise  distribute or to repurchase or otherwise  acquire or retire any share
of its capital stock or any of its other equity securities;


                                       35

<PAGE>



         (m)      assignment, license or other agreement with respect to
any form of intangible property;

         (n)      agreement under which it has granted any person any
registration rights;

         (o)      agreement under which it has limited or restricted its
right to compete with any person in any respect;

         (p) other  contract or group of related  contracts  with the same party
involving more than $10,000 or continuing  over a period of more than six months
from the date or dates thereof (including  renewals or extensions  optional with
another  party),  which  contract or group of contracts is not terminable by UCT
without  penalty  upon notice of thirty  (30) days or less,  but  excluding  any
contract or group of  contracts  with a customer  of UCT for the sale,  lease or
rental of UCT's  products or services if such contract or group of contracts was
entered into by UCT in the ordinary course of business; or

         (q) other contract, instrument, commitment, plan or arrangement, a copy
of which would be required  to be filed with the  Commission  as an exhibit to a
registration  statement on Form S-1 if UCT were registering securities under the
Securities Act of 1933, as amended (the "Securities Act").

UCT has in all  material  respects  performed  all  obligations  required  to be
performed by it to date, has received no notice of default and is not in default
(with  due  notice  or lapse of time or both)  under  any  lease,  agreement  or
contract  now in effect  to which UCT is a party or by which it or its  property
may  be  bound.  UCT  has no  present  expectation  or  intention  of not  fully
performing  all its  obligations  under  each  such  lease,  contract  or  other
agreement,  and UCT has no knowledge of any breach or anticipated  breach of the
other party to any  contract or  commitment  to which UCT is a party.  UCT is in
full  compliance  with  all of the  terms  and  provisions  of the  UCT  Charter
Documents.

         5.13.  Patents,  Trademarks,  etc. Set forth in Schedule 5.13 is a list
and brief  description  of all  patents,  patent  rights,  patent  applications,
trademarks,  trademark  applications,  service marks, service mark applications,
trade  names and  copyrights,  and all  applications  for such  which are in the
process of being  prepared,  owned by or  registered  in the name of UCT,  or of
which UCT is a licensor or  licensee or in which UCT has any right,  and in each
case a brief  description  of the nature of such  right.  UCT owns or  possesses
adequate  licenses  or other  rights to use all  patents,  patent  applications,
trademarks,  trademark  applications,  service marks, service mark applications,
trade names, copyrights,  manufacturing  processes,  formulae, trade secrets and
know-how (collectively,  "Intellectual  Property") necessary or desirable to the
conduct of its business as conducted and as proposed to be

                                       36

<PAGE>



conducted,  and no  claim  is  pending  or,  to the  best of  GUCT's  knowledge,
threatened  to the effect that the  operations  of UCT infringe upon or conflict
with the asserted  rights of any other person under any  Intellectual  Property,
and there is no basis for any such claim (whether or not pending or threatened).
To the best of GUCT's or UCT's  knowledge,  no claim is pending or threatened to
the effect  that any such  Intellectual  Property  owned or  licensed by UCT, or
which UCT  otherwise has the right to use, is invalid or  unenforceable  by UCT,
and there is no basis for any such claim (whether or not pending or threatened).
To the best of GUCT's or UCT's knowledge, all technical information developed by
and belonging to UCT which has not been patented has been kept confidential. UCT
has not  granted  or  assigned  to any  other  person  or  entity  any  right to
manufacture,  have  manufactured,  assemble  or sell the  products  or  proposed
products or to provide the services or proposed services of UCT.

         5.14. Loans and Advances. Other than as set forth on Schedule 5.14, UCT
does  not have  any  outstanding  loans or  advances  to any  person  and is not
obligated to make any such loans or advances, except, in each case, for advances
to employees of UCT in respect of reimbursable  business expenses anticipated to
be incurred by them in connection with their performance of services for UCT.

         5.15.             Assumptions, Guaranties, etc. of Indebtedness of
Other Persons.  UCT has not assumed, guaranteed, endorsed or
otherwise become directly or contingently liable on any
indebtedness of any other person (including, without limitation,
liability by way of agreement, contingent or otherwise, to
purchase, to provide funds for payment, to supply funds to or
otherwise invest in a debtor, or otherwise to assure a creditor
against loss), except for guaranties by endorsement of negotiable
instruments for deposit or collection in the ordinary course of
business.

         5.16.  Significant  Customers  and  Suppliers.  No customer or supplier
which  was  significant  to UCT  during  the  period  covered  by the  financial
statements  referred  to in  Section  5.4 or which has been  significant  to UCT
thereafter,  has  terminated,  materially  reduced or threatened to terminate or
materially  reduce its  purchases  from or  provision of products or services to
UCT, as the case may be.

         5.17.             Governmental Approvals.  No registration or filing
with, or consent or approval of or other action by, any
governmental agency or instrumentality is or will be necessary for
the valid exchange and delivery to International of the UCT Shares.

         5.18.             Disclosure.  Neither this Agreement, the Other
Agreements nor any Schedule or Annex to this Agreement or the Other
Agreements, contains an untrue statement of a material fact or

                                       37

<PAGE>



omits a material  fact  necessary  to make the  statements  contained  herein or
therein not misleading. None of the statements, documents, certificates or other
items  prepared  or  supplied  by UCT or GUCT with  respect to the  transactions
contemplated  hereby contains an untrue  statement of a material fact or omits a
material fact necessary to make the statements contained therein not misleading.
There is no fact which UCT or GUCT has not  disclosed  to NDA and its counsel in
writing and of which UCT or GUCT is aware which materially and adversely affects
or could  materially  and adversely  affect the business,  prospects,  financial
condition, operations, property or affairs of UCT.

         5.19. Offering of the Shares.  Neither UCT nor any person acting on its
behalf has taken or will take any other action (including,  without  limitation,
any offer,  issuance or sale of any  security of UCT under  circumstances  which
might require the  integration of such security with the UCT Shares or any other
securities of UCT, under the Securities Act, or the rules and regulations of the
Commission thereunder),  in either case so as to subject any of the delivery and
exchange of the UCT Shares to International,  to the registration  provisions of
the Securities Act.

         5.20.             Brokers.  UCT has no contract, arrangement or
understanding with any broker, finder or similar agent with respect
to the transactions contemplated by this Agreement.

         5.21.  Officers.  Set forth in Schedule  5.21 is a list of the names of
the officers of UCT, together with the title or job  classification of each such
person and the total compensation  anticipated to be paid to each such person by
UCT in 1996. None of such persons has an employment  agreement or understanding,
whether  oral or written,  with UCT,  which is not  terminable  on notice by UCT
without cost or other liability to UCT.

         5.22.  Transactions  With  Affiliates.  Except as set forth in Schedule
5.12, no director,  officer,  employee or  stockholder  of UCT, or member of the
family  of any such  person,  or any  corporation,  partnership,  trust or other
entity in which any such person, or any member of the family of any such person,
has a  substantial  interest or is an  officer,  director,  trustee,  partner or
holder of more than 5% of the outstanding  capital stock thereof,  is a party to
any transaction with UCT, including any contract, agreement or other arrangement
providing for the  employment  of,  furnishing of services by, rental of real or
personal  property  from or otherwise  requiring  payments to any such person or
firm.

         5.23.             Employees.  Each of the officers of UCT, each key
employee and each other employee now employed by UCT who has access
to confidential information of UCT has executed a Confidentiality
Agreement substantially in the form of Annex 5.23 hereto, and such
agreements are in full force and effect.  No officer or key

                                       38

<PAGE>



employee  of UCT has  advised  UCT(orally  or in  writing)  that he  intends  to
terminate  employment  with UCT. UCT has complied in all material  respects with
all applicable  laws relating to the employment of labor,  including  provisions
relating to wages,  hours,  equal  opportunity,  collective  bargaining  and the
payment of Social Security and other taxes.

         5.24.             Updating.  GUCT agrees and undertakes to update the
representations and schedules herein for any changes between the
execution hereof and the Closing.


SECTION 6.                 REPRESENTATIONS AND WARRANTIES CONCERNING PHARMASOFT

         As of the execution of this  Agreement  and at the Closing  Date,  GUCT
represents  and  warrants to NDA and the NDA  Stockholders  that,  except as set
forth in any Schedule attached hereto:

         6.1.     Organization, Qualifications and Corporate Power.

                      (a)  Pharmasoft is a corporation duly incorporated,
validly  existing and in good standing under the laws of Switzerland and is duly
licensed or qualified to transact  business as a foreign  corporation  and is in
good  standing  in  each  jurisdiction  in  which  the  nature  of the  business
transacted  by it or the  character  of the  properties  owned or  leased  by it
requires such licensing or qualification. Pharmasoft has the corporate power and
authority  to own and hold its  properties  and to carry on its  business as now
conducted and as proposed to be conducted.

                      (b)           Pharmasoft does not (i) own of record or
beneficially,  directly  or  indirectly,  (A) any  shares  of  capital  stock or
securities  convertible  into capital stock of any other  corporation or (B) any
participating interest in any partnership,  joint venture or other non-corporate
business enterprise or (ii) control, directly or indirectly, any other entity.

         6.2.     Authorization of Agreements, etc.

                      (a) The exchange and delivery to International of the
Pharmasoft  Shares have been duly authorized by all requisite  corporate  action
and will not  violate  any  provision  of law,  any  order of any court or other
agency of  government,  or the By-laws of Pharmasoft  (the  "Pharmasoft  Charter
Documents"),  which are  attached  as  Schedule  6.2,  or any  provision  of any
indenture,  agreement or other instrument to which Pharmasoft, or its properties
or assets is bound, or conflict with,  result in a breach of or constitute (with
due  notice  or lapse  of time or  both) a  default  under  any such  indenture,
agreement or other  instrument,  or result in the creation or  imposition of any
lien,  charge,  restriction,  claim or encumbrance of any nature whatsoever upon
any of the properties or assets of Pharmasoft or any of its subsidiaries.

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<PAGE>




                      (b)  Pharmasoft has secured any required waivers and
consents from its  stockholders  in connection with the exchange and delivery of
the Pharmasoft Shares to International,  free of any preemptive rights or rights
of first refusal of any stockholders of Pharmasoft or any other person.

                      (c)  The Pharmasoft Shares have been duly authorized
and, when delivered to International in accordance with this Agreement,  will be
validly  issued,  fully  paid  and  nonassessable  with  no  personal  liability
attaching to the ownership thereof and will be owned by International,  free and
clear of all liens, charges, restrictions, claims and encumbrances except as set
forth  in  the  International   Stockholders  Agreement  and  the  International
Registration  Rights  Agreement.  The delivery  and  exchange of the  Pharmasoft
Shares to  International  is not subject to any preemptive right of stockholders
of  Pharmasoft  or to any right of first  refusal or other right in favor of any
person  that  has  not  been  waived  to the  extent  necessary  to  permit  the
transactions contemplated by this Agreement to occur.

         6.3.     INTENTIONALLY OMITTED

         6.4.   Authorized  Capital  Stock.  The  authorized  capital  stock  of
Pharmasoft  consists of 445 shares, CHF 1,000 par value, all of which are issued
and  outstanding.  The  stockholders  of record and  holders  of  subscriptions,
warrants, options, convertible securities and other rights (contingent or other)
to purchase or otherwise  acquire equity securities of Pharmasoft and the number
of  shares  of   Pharmasoft's   equity   securities   and  the  number  of  such
subscriptions,  warrants, options, convertible securities, and other such rights
held by each, are as set forth in the attached Schedule 6.4. Except as set forth
in the  attached  Schedule  6.4,  (i) no  person  owns of  record or is known to
Pharmasoft to own beneficially any shares of capital stock of Pharmasoft (ii) no
subscription,  warrant, option,  convertible security or other right (contingent
or other) to purchase or otherwise  acquire  equity  securities of Pharmasoft is
authorized  or  outstanding  and (iii) there is no  commitment  by Pharmasoft to
issue shares, subscriptions,  warrants, options, convertible securities or other
such  rights or to  distribute  to holders of any of its equity  securities  any
evidence of  indebtedness  or asset.  Except as provided  for in the  Pharmasoft
Charter Documents or as set forth in the attached  Schedule 6.4,  Pharmasoft has
no obligation (contingent or otherwise) to purchase, redeem or otherwise acquire
any of its equity  securities or any interest  therein or to pay any dividend or
make any other  distribution in respect thereof.  Other than as set forth in the
International  Stockholders'  Agreement,  there  are,  to the best of GUCT's and
Pharmasoft's   knowledge,   no  voting  trusts  or   agreements,   stockholders'
agreements,  pledge agreements,  buy-sell  agreements,  rights of first refusal,
preemptive  rights or proxies relating to any securities of Pharmasoft  (whether
or not Pharmasoft is a party

                                       40

<PAGE>



thereto).  All of the outstanding securities of Pharmasoft were
issued in compliance with all applicable Swiss laws.

         6.5. Financial Statements.  Pharmasoft has furnished to NDA and the NDA
Stockholders  its  unaudited  balance  sheet as of May 31,  1996 and the related
statements of income,  stockholders  equity and cash flows of Pharmasoft for the
year then ended.  Pharmasoft has also furnished to NDA and the NDA  Stockholders
its interim  unaudited  income  statement  and balance sheet for the four months
ended September 30, 1996.  Copies of all such financial  statements are attached
on Schedule 6.5 hereto.  All such  financial  statements  have been  prepared in
accordance with generally accepted accounting  principles  consistently  applied
and fairly  present the  consolidated  financial  position of  Pharmasoft at the
dates and for the periods to which they relate.  Since the date of September 30,
1996 balance sheet,  (i) there has been no change in the assets,  liabilities or
financial  condition of  Pharmasoft  from that  reflected in such balance  sheet
except for changes in the  ordinary  course of business  which in the  aggregate
have not been  materially  adverse  and (ii)  none of the  business,  prospects,
financial  condition,  operations,  property or affairs of Pharmasoft  have been
materially adversely affected by any occurrence or development,  individually or
in the aggregate, whether or not insured against.

         6.6. Events Subsequent to the Date of the Balance Sheet. Since the date
of its September 30, 1996 balance  sheet,  Pharmasoft  has not (i) except as set
forth in the attached  Schedule 6.13,  issued any stock, bond or other corporate
security,  (ii)  borrowed  any  amount  or  incurred  or become  subject  to any
liability (absolute, accrued or contingent), except current liabilities incurred
and liabilities under contracts entered into in the ordinary course of business,
(iii)  discharged or satisfied any lien or  encumbrance  or incurred or paid any
obligation or liability  (absolute,  accrued or  contingent)  other than current
liabilities   shown  on  the  September  30,  1996  balance  sheet  and  current
liabilities incurred since the date of such balance sheet in the ordinary course
of business,  (iv) declared or made any payment or  distribution to stockholders
or purchased or redeemed any share of its capital stock or other  security,  (v)
mortgaged,  pledged  or  subjected  to  lien  any of  its  assets,  tangible  or
intangible,  other  than liens of current  real  property  taxes not yet due and
payable, (vi) sold, assigned or transferred any of its tangible assets except in
the ordinary  course of business,  or cancelled  any debt or claim,  (vii) sold,
assigned,  transferred  or granted any  exclusive  license  with  respect to any
patent,  trademark,  trade name, service mark, copyright,  trade secret or other
intangible  asset,  (viii)  suffered any loss of property or waived any right of
substantial  value whether or not in the ordinary course of business,  (ix) made
any change in officer compensation except in the ordinary course of business and
consistent  with past  practice,  (x) made any material  change in the manner of
business or operations of Pharmasoft,  (xi) entered into any transaction  except
in the ordinary course of

                                       41

<PAGE>



business  or  as  otherwise  contemplated  hereby  or  (xii)  entered  into  any
commitment (contingent or otherwise) to do any of the foregoing.

         6.7.  Litigation;  Compliance with Law.  Neither GUCT nor Pharmasoft is
aware of any (i) action,  suit,  claim,  proceeding or investigation  pending or
threatened against or affecting Pharmasoft, at law or in equity, or before or by
any country,  state,  municipal or other  governmental  department,  commission,
board, bureau, agency or instrumentality,  domestic or foreign, (ii) arbitration
proceeding relating to Pharmasoft pending under collective bargaining agreements
or otherwise or (iii) governmental inquiry pending or, to the best of GUCT's and
Pharmasoft's  knowledge,  threatened against or affecting Pharmasoft (including,
without limitation, any inquiry as to the qualification of Pharmasoft to hold or
receive any  license or  permit).  Pharmasoft  has not  received  any opinion or
memorandum  or legal advice from legal counsel to the effect that it is exposed,
from a legal standpoint,  to any liability or disadvantage which may be material
to  its  business,  prospects,  financial  condition,  operations,  property  or
affairs.  Pharmasoft  is  not in  default  with  respect  to  any  order,  writ,
injunction  or decree known to or served upon  Pharmasoft of any court or of any
country, state, municipal or other governmental department,  commission,  board,
bureau,  agency or instrumentality,  domestic or foreign.  There is no action or
suit by Pharmasoft pending or threatened against others. Pharmasoft has complied
with all  laws,  rules,  regulations  and  orders  applicable  to its  business,
operations,  properties,  assets,  products and services, and Pharmasoft has all
necessary  permits,  licenses and other  authorizations  required to conduct its
business as conducted and as proposed to be conducted. There is no existing law,
rule,  regulation or order, and neither GUCT nor Pharmasoft after due inquiry is
not aware of any proposed law, rule, regulation or order, whether of any country
or state,  which would  prohibit  or  restrict  Pharmasoft  from,  or  otherwise
materially  adversely  affect  Pharmasoft  in,  conducting  its  business in any
jurisdiction  in which it is now conducting  business or in which it proposes to
conduct business.

         6.8.  Proprietary  Information of Third Parties.  To the best of GUCT's
and  Pharmasoft's  knowledge,  no third party has claimed or has reason to claim
that any person  employed by or affiliated  with  Pharmasoft has (a) violated or
may  be  violating  any  of  the  terms  or   conditions   of  his   employment,
non-competition or non-disclosure agreement with such third party, (b) disclosed
or may be  disclosing  or  utilized  or may be  utilizing  any  trade  secret or
proprietary  information or  documentation of such third party or (c) interfered
or may be interfering in the  employment  relationship  between such third party
and any of its  present  or  former  employees.  No third  party  has  requested
information   from  Pharmasoft  which  suggests  that  such  a  claim  might  be
contemplated. To the best of GUCT's and Pharmasoft's knowledge, no person

                                       42

<PAGE>



employed by or affiliated with Pharmasoft has employed or proposes to employ any
trade  secret or any  information  or  documentation  proprietary  to any former
employer,  and to the best of  GUCT's  and  Pharmasoft's  knowledge,  no  person
employed  by  or  affiliated  with  Pharmasoft  has  violated  any  confidential
relationship  which such person may have had with any third party, in connection
with the development,  manufacture or sale of any product or proposed product or
the  development or sale of any service or proposed  service of Pharmasoft,  and
Pharmasoft  has no  reason  to  believe  there  will be any such  employment  or
violation.  To the  best of  GUCT's  and  Pharmasoft's  knowledge,  neither  the
carrying on of the business of  Pharmasoft  as officers,  employees or agents by
any officer, director or key employee of Pharmasoft, nor the conduct or proposed
conduct of the business of Pharmasoft,  will conflict with or result in a breach
of the terms,  conditions  or  provisions  of or  constitute a default under any
contract, covenant or instrument under which any such person is obligated.

         6.9. Title to Properties.  Pharmasoft has good and marketable  title to
its properties  and assets  reflected on the September 30, 1996 balance sheet or
acquired by it since the date of said balance sheet (other than  properties  and
assets  disposed of in the  ordinary  course of business  since the date of said
balance  sheet),  and all such  properties  and  assets  are  free and  clear of
mortgages, pledges, security interests, liens, charges, claims, restrictions and
other  encumbrances,  except  for  liens  for or  current  taxes not yet due and
payable.

         6.10. Leasehold Interests. Except as set forth in Schedule 6.13(B), (i)
each lease or  agreement  to which  Pharmasoft  is a party  under  which it is a
lessee of any property,  real or personal,  is a valid and subsisting  agreement
without  any  default of  Pharmasoft  thereunder  and, to the best of GUCT's and
Pharmasoft's  knowledge,  without  any  default  thereunder  of any other  party
thereto;  (ii) no event has occurred and is continuing which, with due notice or
lapse of time or both,  would  constitute  a  default  or  event of  default  by
Pharmasoft  under any such  lease or  agreement  or,  to the best of GUCT's  and
Pharmasoft's  knowledge,  by any other  party  thereto;  and (iii)  Pharmasoft's
possession  of  such  property  has  not  been  disturbed  and,  to the  best of
Pharmasoft's knowledge, no claim has been asserted against Pharmasoft adverse to
its rights in such leasehold interests.

         6.11.     Insurance.  Pharmasoft holds valid policies covering
all of the insurance required to be maintained by it under Section
12.4 of the International Stockholders Agreement.

         6.12.     Taxes.  Pharmasoft has filed all tax returns
required to be filed by it, and Pharmasoft has paid all taxes shown
to be due by such returns as well as all other taxes, assessments
and governmental charges which have become due or payable,
including, without limitation, all taxes which Pharmasoft is

                                       43

<PAGE>



obligated  to withhold  from amounts  owing to  employees,  creditors  and third
parties.  All such taxes with respect to which  Pharmasoft has become  obligated
pursuant to elections made by Pharmasoft in accordance  with generally  accepted
practice  have been paid and adequate  reserves  have been  established  for all
taxes  accrued but not yet payable.  The Swiss income tax returns of  Pharmasoft
have  never  been  audited  by  the  Swiss  tax  administration.  No  deficiency
assessment with respect to or proposed  adjustment of Pharmasoft's Swiss federal
or  cantonal  taxes  is  pending  or,  to the  best of  Pharmasoft's  knowledge,
threatened.  There  are no tax  liens  imposed  by any  Swiss  taxing  authority
outstanding   against  the  assets,   properties  or  business  of   Pharmasoft.
Pharmasoft's net operating losses for Swiss income tax purposes, as set forth in
the financial statements referred to in Section 6.5, are available to offset the
taxable  income of  Pharmasoft  for the current  fiscal year and the  succeeding
years as per Schedule 6.12 hereto. Consummation of the transactions contemplated
by  this  Agreement  or by any  other  agreement,  understanding  or  commitment
(contingent  or  otherwise)  to  which  Pharmasoft  is a party or by which it is
otherwise bound will not have the effect of limiting Pharmasoft's ability to use
such net operating  losses in full to offset such taxable income.  Pharmasoft is
not a party to any tax allocation or sharing agreement. Pharmasoft does not have
any liability or obligation,  existing or contingent, as guarantor,  transferee,
successor or otherwise, by contract or otherwise,  for the federal, state, local
or foreign taxes,  assessments  and  governmental  charges  payable by any other
entity or person in any jurisdiction  including without limitation any member of
a "consolidated group" of which UCT may be deemed to have been a part.

         6.13. Other  Agreements.  Except as set forth in the attached  Schedule
6.13(A),  Pharmasoft is not a party to or otherwise bound by any written or oral
contract  or  instrument  or  other  restriction  which  individually  or in the
aggregate could materially adversely affect the business,  prospects,  financial
condition, operations, property or affairs of Pharmasoft. Except as set forth in
the attached Schedule  6.13(B),  Pharmasoft is not a party to or otherwise bound
by any written or oral:

         (a) distributor,  dealer, manufacturer's representative or sales agency
contract or similar  agreement  which is not terminable on less than ninety (90)
days' notice without cost or other liability to Pharmasoft;

         (b) sales  contract which entitles any customer to a rebate or right of
set-off,  to return any product to  Pharmasoft  after  acceptance  thereof or to
delay the  acceptance  thereof,  or which  varies in any  material  respect from
Pharmasoft's standard form contracts;


                                       44

<PAGE>



         (c)      contract with any labor union (and, to the knowledge of
Pharmasoft, no organizational effort is being made with respect to
any of its employees);

         (d)  contract or other  commitment  with any  supplier  containing  any
provision permitting any party other than Pharmasoft to renegotiate the price or
other terms,  or containing  any pay-back or other similar  provision,  upon the
occurrence of a failure by Pharmasoft to meet its obligations under the contract
when due or the occurrence of any other event;

         (e)      contract for the future purchase of fixed assets or for
the future purchase of materials, supplies or equipment in excess
of its normal operating requirements;

         (f)  contract  for the  employment  of any  officer,  employee or other
person  (whether  of a  legally  binding  nature or in the  nature  of  informal
understandings)  on a full-time or consulting  basis which is not  terminable on
notice without cost or other  liability to Pharmasoft,  except normal  severance
arrangements and accrued vacation pay;

         (g)  bonus,  pension,  profit-sharing,   retirement,   hospitalization,
insurance, stock purchase, stock option or other plan, contract or understanding
pursuant to which  benefits are provided to any  employee of  Pharmasoft  (other
than group insurance plans applicable to employees generally);

         (h)      agreement or indenture relating to the borrowing of money
or to the mortgaging or pledging of, or otherwise placing a lien or
security interest on, any asset of Pharmasoft;

         (i)      guaranty of any obligation for borrowed money or
otherwise;

         (j)  voting  trust  or  agreement,   stockholders   agreement,   pledge
agreement,  buy-sell  agreement or first refusal or preemptive  rights agreement
relating to any securities of Pharmasoft;

         (k) agreement,  or group of related  agreements  with the same party or
any group of affiliated  parties,  under which Pharmasoft has advanced or agreed
to advance money or has agreed to lease any property as lessee or lessor;

         (l) agreement or obligation (contingent or otherwise) to issue, sell or
otherwise  distribute or to repurchase or otherwise  acquire or retire any share
of its capital stock or any of its other equity securities;

         (m)      assignment, license or other agreement with respect to
any form of intangible property;


                                       45

<PAGE>



         (n)      agreement under which it has granted any person any
registration rights;

         (o)      agreement under which it has limited or restricted its
right to compete with any person in any respect;

         (p) other  contract or group of related  contracts  with the same party
involving more than $10,000 or continuing  over a period of more than six months
from the date or dates thereof (including  renewals or extensions  optional with
another  party),  which  contract or group of  contracts  is not  terminable  by
Pharmasoft  without  penalty  upon  notice  of  thirty  (30)  days or less,  but
excluding any contract or group of contracts  with a customer of Pharmasoft  for
the sale,  lease or rental of NDA's  products or  services  if such  contract or
group of contracts  was entered  into by  Pharmasoft  in the ordinary  course of
business; or

         (q) other contract, instrument, commitment, plan or arrangement, a copy
of which  would  be  required  to be filed  with  the  Securities  and  Exchange
Commission (the "Commission") as an exhibit to a registration  statement on Form
S-1 if Pharmasoft were registering  securities under the Securities Act of 1933,
as amended (the "Securities Act").

Pharmasoft has in all material respects performed all obligations required to be
performed  by it to date,  has  received  no  notice of  default  and are not in
default (with due notice or lapse of time or both) under any lease, agreement or
contract  now in  effect  to which  Pharmasoft  is a party or by which it or its
property may be bound. Pharmasoft has no present expectation or intention of not
fully  performing all its obligations  under each such lease,  contract or other
agreement,  and neither GUCT nor  Pharmasoft  has any knowledge of any breach or
anticipated  breach of the other party to any  contract or  commitment  to which
Pharmasoft is a party.  Pharmasoft is in full  compliance  with all of the terms
and provisions of the Pharmasoft Charter Documents.

         6.14.  Patents,  Trademarks,  etc. Set forth in Schedule 6.14 is a list
and brief  description  of all  patents,  patent  rights,  patent  applications,
trademarks,  trademark  applications,  service marks, service mark applications,
trade  names and  copyrights,  and all  applications  for such  which are in the
process of being prepared, owned by or registered in the name of Pharmasoft,  or
of which  Pharmasoft  is a licensor or licensee or in which  Pharmasoft  has any
right,  and in each  case a  brief  description  of the  nature  of such  right.
Pharmasoft  owns or  possesses  adequate  licenses  or other  rights  to use all
patents, patent applications, trademarks, trademark applications, service marks,
service mark applications,  trade names,  copyrights,  manufacturing  processes,
formulae,  trade secrets and know-how  (collectively,  "Intellectual  Property")
necessary  or  desirable  to the  conduct of its  business as  conducted  and as
proposed to be conducted, and no claim is pending or, to the

                                       46

<PAGE>



best of GUCT's and  Pharmasoft's  knowledge,  threatened  to the effect that the
operations of Pharmasoft  infringe upon or conflict with the asserted  rights of
any other person under any Intellectual  Property, and there is no basis for any
such claim  (whether  or not pending or  threatened).  To the best of GUCT's and
Pharmasoft's knowledge, no claim is pending or threatened to the effect that any
such Intellectual Property owned or licensed by Pharmasoft,  or which Pharmasoft
otherwise has the right to use, is invalid or unenforceable  by Pharmasoft,  and
there is no basis for any such claim (whether or not pending or threatened).  To
the  best of  GUCT's  and  Pharmasoft's  knowledge,  all  technical  information
developed by and  belonging to  Pharmasoft  which has not been patented has been
kept confidential. Pharmasoft has not granted or assigned to any other person or
entity  any  right  to  manufacture,  have  manufactured,  assemble  or sell the
products or proposed products or to provide the services or proposed services of
Pharmasoft, except as per agreements disclosed on Schedule 6.13.

         6.15.  Loans and  Advances.  Other than as set forth on Schedule  6.15,
Pharmasoft does not have any outstanding  loans or advances to any person and is
not  obligated to make any such loans or  advances,  except,  in each case,  for
advances to employees of Pharmasoft in respect of reimbursable business expenses
anticipated  to be  incurred by them in  connection  with their  performance  of
services for Pharmasoft.

         6.16.             Assumptions, Guaranties, etc. of Indebtedness of
Other Persons.  Pharmasoft has not assumed, guaranteed, endorsed or
otherwise become directly or contingently liable on any
indebtedness of any other person (including, without limitation,
liability by way of agreement, contingent or otherwise, to
purchase, to provide funds for payment, to supply funds to or
otherwise invest in a debtor, or otherwise to assure a creditor
against loss), except for guaranties by endorsement of negotiable
instruments for deposit or collection in the ordinary course of
business.

         6.17.  Significant  Customers  and  Suppliers.  No customer or supplier
which was  significant to Pharmasoft  during the period covered by the financial
statements  referred  to in  Section  6.5  or  which  has  been  significant  to
Pharmasoft  thereafter,  has  terminated,  materially  reduced or  threatened to
terminate or materially  reduce its  purchases  from or provision of products or
services to Pharmasoft, as the case may be.

         6.18.  Governmental  Approvals.  No  registration  or filing  with,  or
consent  or  approval  of or  other  action  by,  any  Federal,  state  or other
governmental  agency or  instrumentality  is or will be necessary  for the valid
execution,  delivery and  performance  by Pharmasoft  of this  Agreement and the
Other  Agreements,  including the delivery and exchange of the Pharmasoft Shares
with International.

                                       47

<PAGE>




         6.19. Disclosure.  Neither this Agreement nor the Other Agreements, nor
any  Schedule  Annex or  Exhibit  to this  Agreement  or the  Other  Agreements,
contains  an  untrue  statement  of a  material  fact or omits a  material  fact
necessary to make the  statements  contained  herein or therein not  misleading.
None of the  statements,  documents,  certificates  or other  items  prepared or
supplied by GUCT or  Pharmasoft  with respect to the  transactions  contemplated
hereby contains an untrue  statement of a material fact or omits a material fact
necessary to make the statements  contained therein not misleading.  There is no
fact  which  Pharmasoft  or GUCT has not  disclosed  to NDA and its  counsel  in
writing and of which  Pharmasoft or GUCT is aware which materially and adversely
affects  or could  materially  and  adversely  affect the  business,  prospects,
financial condition, operations, property or affairs of Pharmasoft.

         6.20. Offering of the Shares.  Neither Pharmasoft nor any person acting
on its  behalf  has  taken or will  take any other  action  (including,  without
limitation,  any offer,  issuance or sale of any  security of  Pharmasoft  under
circumstances  which  might  require  the  integration  of  such  security  with
Pharmasoft's securities under the Securities Act or the rules and regulations of
the  Commission  thereunder),  in either case so as to subject the  delivery and
exchange of the Pharmasoft Shares to and with International, to the registration
provisions of the Securities Act.

         6.21.             Brokers.  Pharmasoft has no contract, arrangement or
understanding with any broker, finder or similar agent with respect
to the transactions contemplated by this Agreement.

         6.22.             Officers.  Pharmasoft does not have any officers or
employees.

         6.23.  Transactions  With  Affiliates.  Except as set forth in Schedule
6.23, no director,  officer, employee or stockholder of Pharmasoft, or member of
the family of any such person, or any corporation,  partnership,  trust or other
entity in which any such person, or any member of the family of any such person,
has a  substantial  interest or is an  officer,  director,  trustee,  partner or
holder of more than 5% of the outstanding  capital stock thereof,  is a party to
any  transaction  with  Pharmasoft,  including any contract,  agreement or other
arrangement  providing for the employment of,  furnishing of services by, rental
of real or personal  property from or otherwise  requiring  payments to any such
person or firm.

         6.24.             Employees.  Pharmasoft has complied in all material
respects with all applicable laws of Switzerland relating to the
employment of labor, including provisions relating to wages, hours,
collective conventions and the payment of AVS and LPP charges.


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<PAGE>



         6.25.             Updating.  GUCT agrees and undertakes to update the
representations and schedules herein for any changes between the
execution hereof and the Closing.


SECTION 7.                 REPRESENTATIONS AND WARRANTIES CONCERNING THE NDA
                           STOCKHOLDERS' AND GUCT'S EXCHANGE OF THEIR
                           RESPECTIVE SHARES INTO INTERNATIONAL SHARES

         7.1.  Representations  and Warranties  Concerning the NDA Stockholders'
and GUCT'S Exchange of their Respective Shares into International  Shares. As of
the  execution  of  this  Agreement  and at the  Closing  Date,  each of the NDA
Stockholders  and Converting NDA Stockholders  hereby  severally  represents and
warrants to NDA and GUCT, and GUCT hereby represents and warrants to NDA and the
NDA Stockholders, that, except as set forth in any Schedule attached hereto:

                           (a)  It is an "accredited investor" within the
meaning  of Rule 501  under the  Securities  Act and was not  organized  for the
specific purpose of acquiring the International Shares.

                           (b)  It has sufficient knowledge and experience in
investing in companies similar to International so as to be able to evaluate the
risks and merits of the exchange of its Outstanding NDA Shares,  (including with
respect to the Converting NDA  Stockholders,  their  Converted NDA Shares),  and
including, in the case of GUCT, its UCT Shares and Pharmasoft Shares, for shares
of International and is able to financially bear the risks thereof.

                           (c)  It has had an opportunity to discuss the
business of NDA, UCT and Pharmasoft and the proposed  business of International,
including each company's respective management and financial affairs.

                           (d)  The International Shares being acquired by it
in exchange for its  Outstanding  and Converted NDA Shares,  as the case may be,
and in the case of GUCT, its Outstanding and Converted NDA Shares as well as its
UCT Shares and Pharmasoft Shares, are being acquired for its own account for the
purposes of investment and not with a view to or for sale in connection with any
distribution thereof.

                           (e)  It understands that (i) the International
Shares  have not been  registered  under the  Securities  Act by reason of their
issuance in a transaction  exempt from the registration  requirements  under the
Securities Act pursuant to Section 4(2) thereof or Rules 505 or 506  promulgated
under  the  Securities  Act;  (ii)  the   International   Shares  must  be  held
indefinitely  unless  a  subsequent  disposition  thereof  is made  pursuant  to
registration  under the Securities  Act or by exemption from such  registration;
(iii) the International Shares will bear a legend to such effect

                                       49

<PAGE>



and (iv) International will make a notation on its transfer books
to such affect.

                           (f)      It has made its decision to acquire the
International  Shares  without  reliance  on the  decision of any other party to
acquire International Shares.


SECTION 8.                 REPRESENTATIONS AND WARRANTIES CONCERNING THE
                           CONTRIBUTING INTERNATIONAL STOCKHOLDERS' AND
                           CONVERTING NDA STOCKHOLDERS' PURCHASE OF NEW
                           INTERNATIONAL SHARES AND ACQUISITION OF CONVERTED
                           NDA SHARES

         8.1.   Representations  and  Warranties   Concerning  the  Contributing
International  Stockholders'  and Converting NDA  Stockholders'  Purchase of New
International  Shares  and  Acquisition  of  Converted  NDA  Shares.  As of  the
execution  of this  Agreement,  at the  Closing  Date and,  with  respect to the
purchase of New  International  Shares after the Closing Date, as of the date of
such purchase,  the Contributing  International  Stockholders and the Converting
NDA Stockholders hereby severally represent and warrant to NDA and International
that, except as set forth in any Schedule attached hereto:

                           (a)  It is an "accredited investor" within the
meaning  of Rule 501  under the  Securities  Act and was not  organized  for the
specific purpose of acquiring the New International  Shares or the Converted NDA
Shares, as the case may be.

                           (b)  It has sufficient knowledge and experience in
investing  in  companies  similar to NDA and  International  so as to be able to
evaluate  the risks and merits of the purchase of the New  International  Shares
and Converted NDA Shares and is able to financially bear the risks thereof.

                           (c)  It has had an opportunity to discuss the
business of NDA and proposed business of International, including each company's
respective management and financial affairs.

                           (d)  The New International Shares and the Converted
NDA Shares, as the case may be, are being acquired by it for its own account for
the purposes of investment and not with a view to or for sale in connection with
any   distribution   thereof,   except  as  to  the  delivery  and  exchange  to
International contemplated hereby of the Converted NDA Shares.

                           (e)  It understands that (i) the New International
Shares and Converted NDA Shares have not been  registered  under the  Securities
Act by reason of their  issuance in a transaction  exempt from the  registration
requirements  under the Securities Act pursuant to Section 4(2) thereof or Rules
505 or 506 promulgated

                                       50

<PAGE>



under the Securities  Act; (ii) the New  International  Shares and Converted NDA
Shares  must  be held  indefinitely  unless  a  subsequent  disposition  is made
pursuant to  registration  under the  Securities  Act or by exemption  from such
registration;  (iii) the New International  Shares and Converted NDA Shares will
bear a legend to such effect;  and (iv) NDA will make a notation on its transfer
books to such affect.

                           (f)      It has made its decision to purchase the New
International  Shares and Converted NDA Shares without  reliance on the decision
of any other party to purchase the New  International  Shares and  Converted NDA
Shares.

SECTION 9.                 CONDITIONS TO THE OBLIGATIONS OF NDA, THE NDA
                           STOCKHOLDERS, THE CONTRIBUTING NDA STOCKHOLDERS
                           (OTHER THAN GUCT) AND THE CONVERTING NDA
                           STOCKHOLDERS (OTHER THAN GUCT)

         9.1.  Conditions to the Obligations of NDA, the NDA  Stockholders,  the
Contributing  NDA  Stockholders   (other  than  GUCT)  and  the  Converting  NDA
Stockholders (other than GUCT. The obligation of NDA, the NDA Stockholders,  the
Contributing International Stockholders (other than GUCT) and the Converting NDA
Stockholders   (other  than  GUCT)  to  perform  their  duties  and  obligations
hereunder, to enter into the various transactions specified in Section 1, and to
make their respective deliveries at Closing as specified in Section 2 is subject
to the fulfillment of the following conditions:

                           A.  Representations  and  Warranties  to be True  and
         Correct.  That the representations and warranties  concerning GUCT, UCT
         and  Pharmasoft,  as set forth in Sections 4, 5 and 6 hereof,  shall be
         true,  complete and correct on and as of the Closing Date with the same
         force and effect as though such representations and warranties had been
         made on and as of such date,  except to the extent not  material to the
         financial  condition,  results  of  operations,   business,  prospects,
         working  capital,  assets  or  liabilities  of  each  of  GUCT,  UCT or
         Pharmasoft,  as the case may be, and the  President or Chief  Executive
         Officer of GUCT shall, at and as of the Closing Date, have certified to
         such effect to NDA and the NDA Stockholders in writing.

                           B.       Performance.  GUCT, in all its capacities
         hereunder including as Converting NDA Stockholder and
         Contributing International Stockholder, and International
         shall have performed and complied with all agreements
         contained herein required to be performed and complied with by
         each of them prior to or at the Closing Date, and GUCT, in all
         its capacities hereunder, including as Contributing
         International Stockholder and Converting NDA Stockholder, and
         International shall have made all Closing deliveries set forth

                                       51

<PAGE>



         in Section 2 to be made by them,  and the President or Chief  Executive
         Officer of each of GUCT, and International shall have certified to such
         effect and to the further  effect that all the  conditions set forth in
         this Section 9 have been satisfied.

                           C.       Sufficient NDA Shares Exchanged.  Sufficient
         Outstanding NDA Shares and Converted NDA Shares, shall be
         submitted for exchange to International, so that International
         will own, after giving effect to the Closing, at least 90% of
         the outstanding capital stock of NDA.

                           D.       Proceedings Satisfactory.  All corporate and
         other proceedings to be taken by each of GUCT, UCT, Pharmasoft
         and International, or by any of their stockholders, in
         connection with the transactions contemplated hereby and all
         documents incident thereto shall be satisfactory in form and
         substance to NDA and its counsel and to the NDA Stockholders
         and their respective counsel, if any, and NDA and its counsel
         shall have received all such counterpart originals or
         certified or other copies of such documents as they may
         reasonably request.

SECTION 10.                CONDITIONS TO THE OBLIGATIONS OF GUCT

         10.1. Conditions to the Obligations of GUCT. The obligations of GUCT to
perform  its  duties  and  obligations  hereunder,  to enter  into  the  various
transactions  specified in Section 1, and to make its  respective  deliveries at
Closing  as  specified  in  Section  2, is  subject  to the  fulfillment  of the
following conditions:

                           A.  Representations  and  Warranties  to be True  and
         Correct.  That the representations of NDA, the NDA Stockholders and the
         Converting NDA Stockholders  (not including GUCT) set forth in Sections
         3, 7 and 8 herein, shall be true, complete and correct on and as of the
         Closing   Date  with  the  same  force  and   effect  as  though   such
         representations  and  warranties  had been made on and as of such date,
         except to the extent not material to the financial  condition,  results
         of operations,  business,  prospects, working capital or liabilities of
         NDA, and with respect only to the  representations  and  warranties  of
         NDA, the President or Chief  Executive  Officer of NDA shall, at and as
         of the Closing Date, have certified to such effect in writing.

                           B.    Performance.  Each of NDA, the NDA Stockholders
         and the Converting NDA Stockholders (not including GUCT) and
         those NDA Stockholders who are Contributing International
         Stockholders shall have performed and complied with all
         agreements contained herein required to be performed and
         complied with by each of them prior to or at the Closing Date,

                                       52

<PAGE>



         and each shall have made all Closing  deliveries set forth in Section 2
         to be made by them, and the President or Chief Executive Officer of NDA
         shall have  certified  to such effect in writing,  but only as to NDA's
         performance and Closing deliveries;  and to the further effect that all
         the conditions set forth in this Section 10 applicable to NDA have been
         satisfied;   provided   however,   that   if  NDA,   all   Contributing
         International  Stockholders  (other than GUCT) and all  Converting  NDA
         Stockholders (other than GUCT) perform their obligations hereunder, and
         sufficient  Outstanding  and  Converted  NDA Shares are  submitted  for
         exchange to  International  so that after giving effect to the Closing,
         International  will own not less  than 90% of the  outstanding  capital
         stock of NDA, (assuming for purposes of this calculation, that GUCT has
         fully performed its obligations  hereunder and has exchanged all of its
         Converted  and  Outstanding  NDA  Shares  for   International   Shares,
         irrespective of whether it has done so) then the performances  required
         by  this  Section  10.1(B)  of the NDA  Stockholders  shall  be  deemed
         satisfied.

                           C.       Proceedings Satisfactory.  All corporate and
         other proceedings to be taken by NDA in connection with the
         transactions contemplated hereby and all documents incident
         thereto shall be satisfactory in form and substance to GUCT
         and UCT and their respective counsel, if any, and such parties
         and their respective counsel shall have received all such
         counterpart originals or certified or other copies of such
         documents as they may reasonably request.


SECTION 11.                INTENTIONALLY OMITTED.


SECTION 12.                INTENTIONALLY OMITTED.


SECTION 13.                COVENANTS BETWEEN EXECUTION OF THIS AGREEMENT AND
                           THE CLOSING DATE

         13.1  Conduct of the Business of NDA, UCT and GUCT prior to the Closing
Date. Each of GUCT (on behalf of itself,  UCT, Pharmasoft and International) (to
the  extent  that  GUCT  controls  the  policies  of   International  or  causes
International  to act or to refrain from acting  prior to the Closing  Date) and
NDA  covenant  and agree that,  prior to the Closing  Date,  except as otherwise
consented to or approved in writing by NDA, if the matter  relates to UCT, GUCT,
Pharmasoft or International,  and except as otherwise consented to in writing by
GUCT,  if the matter  relates to NDA, or except as required  to  consummate  the
transactions contemplated by, this Agreement:


                                       53

<PAGE>



                  (a) NDA, GUCT,  Pharmasoft,  UCT and International,  including
their respective  subsidiaries (the "Operating  Companies"),  shall each conduct
their  respective  businesses  in the  ordinary  course  and  consistent  in all
material  respects  with past practice and shall use all  reasonable  efforts to
preserve substantially intact their respective business  organizations,  to keep
available the services of their present officers,  employees and consultants and
to preserve their respective present  relationships  with customers,  suppliers,
payors  and  other   persons  with  whom  they  have  a   significant   business
relationship;

                  (b) None of the  Operating  Companies  shall (i)  amend  their
respective  Charter  Documents  or Bylaws,  (ii)  declare,  set aside or pay any
dividend or other  distribution  or payment in cash,  securities  or property in
respect of their respective  outstanding shares of capital stock, (iii) make any
direct or indirect redemption,  retirement, purchase or other acquisition of any
of its capital stock or (iv) split, combine or reclassify its outstanding shares
of capital stock.

                  (c) No Operating  Company  shall,  directly or indirectly  (i)
issue, grant, sell or pledge or agree to propose to issue, grant, sell or pledge
any shares of, or rights or  securities of any kind to acquire any shares of any
company  except as provided in this  Agreement,  (ii) other than in the ordinary
course of  business  and  consistent  with  past  practice,  incur any  material
indebtedness  for borrowed money,  (iii) waive,  release,  grant or transfer any
rights of material value, (iv) except as provided in clause (v) below,  merge or
consolidate with any person or adopt any plan of liquidation or dissolution, (v)
acquire,  propose to acquire or enter into an  agreement  to acquire any assets,
stock or other interest of a third party, (vi) transfer, lease, license, sell or
dispose of a material portion of assets or any material assets, (vii) permit any
material  revaluation of any asset (including,  without limitation,  any writing
down of the value of inventory or writing off of notes or accounts  receivable),
(viii)  change any  accounting  principles or methods  except  insofar as may be
required by changes in generally accepted accounting principles or (ix) mortgage
or pledge any of their  assets or  properties  or subject any of their assets or
properties to any material liens, charges, encumbrances, imperfections of title,
security interests, options or rights or claims of other with respect thereto;

                  (d) None of the Operating  Companies  directly or  indirectly,
shall (i) increase the cash  compensation  payable to or become payable by it to
any  of  its  employees,   officers,   consultants  or  directors;  except  cash
compensation payable to non-officer employees to the extent consistent with past
practice and in no event to a rate of total compensation  increased by more than
five percent  (5%) over such  individual's  current such rate,  (ii) enter into,
adopt or amend  any  stock  option,  stock  purchase,  profit-sharing,  pension,
retirement, deferred compensation, restricted

                                       54

<PAGE>



stock or severance plan,  agreement or arrangement for the benefit of employees,
officers,  directors or consultants of an Operating Company, (iii) enter into or
amend any employment or consulting  agreement,  or (iv) make any loan or advance
to, or enter into any written  contract,  lease or commitment with, any officer,
employee, consultant or director of an Operating Company;

                  (e)  No  Operating  Company  shall,  directly  or  indirectly,
assume,  guarantee,  endorse or otherwise become responsible for the obligations
of any  other  individual,  corporation  or other  entity,  or make any loans or
advances to any  individual,  corporation or other entity except in the ordinary
course of business and consistent with past practices;

                  (f) No  Operating  Company  shall  authorize or enter into any
agreement  to do any of the things  described in clauses (a) through (e) of this
Section 13.1.

         13.2. Access to Properties and Records.  Each party shall afford to the
other and their respective accountants, counsel and representatives,  reasonable
access during normal  business hours  throughout the period prior to the Closing
Date to all of  their  respective  properties  (including,  without  limitation,
books,  contracts,  commitments and written  records),  as well as those of each
Operating  Company in which it,  either  alone or with other  parties  similarly
situated,  collectively  own a controlling  interest,  and shall make reasonably
available their  respective  officers and employees to answer fully and promptly
questions put to them thereby; provided, however, that no investigation pursuant
to this  Section  13.2 shall alter any  representation  or warranty of any party
hereto or the conditions to the obligations of the parties hereto.

         13.3  No Solicitation, Etc.

                  (a) Prior to the Closing Date,  each  Operating  Company shall
not, and shall cause each of its officers,  directors,  employees, agents, legal
and financial  advisors and  affiliates not to,  directly or  indirectly,  make,
solicit,  encourage,  initiate  or enter  into any  agreement  or  agreement  in
principle or announce any intention to do any of the foregoing,  with respect to
any offer or  proposal  to acquire  all or a  substantial  part of an  Operating
Company's  business  and  properties  or a  substantial  amount of an  Operating
Company's  equity  securities or debt  securities  whether by purchase,  merger,
purchase or assets,  tender offer,  exchange  offer,  business  offer,  business
combination or otherwise (any such proposal or offer being hereinafter  referred
to as a "Third Party Transaction").

                  (b) Prior to the Closing Date, an Operating Company shall not,
and shall cause each of their officers, directors, legal and financial advisors,
agents and affiliates not to, directly or

                                       55

<PAGE>



indirectly, participate in any negotiations or discussions regarding, or furnish
any information with respect to, or otherwise cooperate in any way in connection
with,  or assist or  participate  in,  facilitate  or  encourage,  any effort or
attempt to effect or seek to effect, a Third Party Transaction with or involving
any  other  person.  NDA and GUCT (on  behalf  of  itself,  UCT and  Pharmasoft)
represents  and warrants that it is not currently  involved in any  negotiations
with  any  person  with  respect  to any  Third  Party  Transaction  not  hereby
contemplated.

         13.4  Employee  Benefits  Plans.  Except as otherwise  provided in this
Agreement,  each  Operating  Company's  employee  benefit  plans  listed  on any
Schedule or Annex hereto which are in effect at the date of this Agreement shall
remain in effect  immediately  following  the Closing  Date,  except each person
having an option to  purchase  shares of NDA shall be instead  deemed to have an
option to purchase a number of International  Shares equal to the exchange ratio
of NDA Shares for Shares of International set forth in Section 1.3.

         13.5  Confidentiality.  Each of NDA,  the NDA  Stockholders,  GUCT,  on
behalf of itself,  Pharmasoft  and UCT,  agrees that it will not, and will cause
its respective  representatives  not to, use any  information  obtained from any
other party for any purpose  unrelated to the  consummation of the  transactions
contemplated by this Agreement.  Subject to the  requirements of law, each party
hereto will keep confidential,  and will cause its respective representatives to
keep  confidential,  all information and documents  obtained except as otherwise
consented by the person to whom the information or documents relates.

         13.6  Supplemental   Disclosure  Schedules.   Each  of  GUCT,  UCT  and
Pharmasoft,  on the one hand, and NDA on the other hand,  shall supplement their
respective  Annexes and Schedules,  representation  and warranties  delivered in
connection with this Agreement as of the Closing Date to the extent necessary to
reflect  matters  permitted  by,  or  consented  to by,  the  other  under  this
Agreement.  In addition,  from time to time prior to the Closing  Date,  each of
NDA, GUCT,  Pharmasoft  and UCT will promptly  deliver to the other parties such
amended or  supplemental  material as may be  necessary  to make the  Schedules,
Annexes,  representations  and warranties  accurate and complete in all material
respects as of the Closing  Date;  provided,  however,  that no such  disclosure
shall have any effect for the purpose of  determining  the  satisfaction  of the
conditions to Closing set forth in Sections 9 and 10 of this Agreement.

         13.7 No Action.  Except as  contemplated  by this  Agreement,  no party
hereto will, nor will any Operating  Company permit any of its  subsidiaries to,
take or agree or commit to take any action that is reasonably likely to make any
of its  representations  or  warranties  hereunder  inaccurate  in any  material
respect at the date made (to the extent so limited), or as of the Closing Date.

                                       56

<PAGE>




         13.8  Notification of Certain Matters; Delivery of Financial
Information.

                  (a) NDA agrees that it shall give prompt  notice to GUCT,  and
GUCT will give prompt  notice to NDA and the NDA  Stockholders  of (i) any known
breach of any  representations or warranties  contained in this Agreement at any
time from the date hereof to the Closing Date and (ii) any  material  failure of
any  party,  as the case may be, or any  officer,  director,  employee  or agent
thereof,  to comply with or satisfy any  covenant,  condition or agreement to be
complied with or satisfied by it hereunder;  provided,  however, that failure to
give such  notice  shall not  constitute  a waiver  of any  defense  that may be
validly asserted.

                  (b) Each Operating  Company shall furnish the other  Operating
Companies with all financial,  operating and other  information and data as each
such  Operating  Company,  through  its  officers,   employees  or  agents,  may
reasonably request and shall promptly furnish to the other party a copy of.

         13.9 Changes in Capital Stock.  Prior to the Closing Date, no Operating
Company shall disclose,  set aside or pay any dividend or other  distribution or
payment in cash,  securities  or  property  in respect of shares of its  capital
stock.

         13.10 Reasonable Efforts to Procure Required Consents.  Each of NDA and
GUCT agrees to use all  reasonable  efforts to secure any  required  third party
consents,  such as those of lenders,  government agencies,  regulatory agencies,
stockholders, directors, etc.


SECTION 14.                TERMINATION

         14.1.             Termination by Mutual Consent.  This Agreement may
be terminated and the transactions contemplated hereby abandoned at
any time prior to the Closing Date, by the mutual consent of GUCT,
on the one hand, and NDA and the majority in interest of NDA
Stockholders, on the other hand.

         14.2.  Termination by either NDA and the NDA  Stockholders,  on the one
hand, or GUCT,  on the other hand.  This  Agreement  may be  terminated  and the
transactions contemplated hereby may be abandoned (i) by the decision of NDA and
a majority in interest of the NDA  Stockholders  if the Closing has not occurred
on or prior to March 31,  1997,  unless such Closing has not occurred due to the
failure of NDA or the NDA  Stockholders  to perform  or  observe  any  covenant,
agreement or condition  thereof to be performed or observed by it or any of them
at or before the Closing  Date;  or (ii) by the decision of GUCT, if the Closing
has not  occurred  on or before  March 31,  1997,  unless  such  Closing has not
occurred  due to the  failure  of GUCT  to  perform  or  observe  any  covenant,
agreement

                                       57

<PAGE>



or condition thereof to be performed or observed by it or any of
them at or before the Closing Date.

         14.3.             Termination by NDA and the NDA Stockholders.  This
                           --------------------------------------------
Agreement may be terminated prior to the Closing Date by the
decision of NDA and a majority in interest of the NDA Stockholders
and the transactions contemplated hereby may be abandoned in the
event (i) there has been a breach by GUCT of any representation or
warranty contained in this Agreement or the Other Agreements, the
effect of which is to materially adversely impact the business or
financial condition of GUCT; or (ii) there has been a breach in any
material respect of any of the covenants or agreements set forth in
this Agreement or the Other Agreements, on the part of GUCT, which
breach materially adversely impacts GUCT, UCT, Pharmasoft or
International, and which breach is not curable, or if curable, is
not cured within 30 days after written notice of breach is given by
NDA, or a majority in interest of the NDA Stockholders, to GUCT.

         14.4.  Termination by GUCT. This Agreement and the Other Agreements may
be  terminated   prior  to  the  Closing  Date  by  GUCT  and  the  transactions
contemplated  hereby and  thereby may be  abandoned,  in the event (i) there has
been a breach by NDA or the NDA Stockholders of any  representation  or warranty
contained in this Agreement or the Other  Agreements,  the effect of which is to
materially  adversely impact the business or financial condition of NDA; or (ii)
there has been a breach  in any  material  respect  of any of the  covenants  or
agreements set forth in this Agreement or the Other  Agreements,  on the part of
NDA or the NDA Stockholders,  which breach materially adversely impacts NDA, and
which  breach is not curable,  or if curable,  is not cured within 30 days after
written  notice  of breach is given by GUCT to NDA,  except to the  extent  such
breach is not a condition to Closing as described in Section 10.1(B).

         14.5.             Effect of Termination and Abandonment.  (a)  Subject
                           --------------------------------------
to sharing of costs for professional fees as provided in Section
                                                         -------
15.1, and the confidentiality provisions of Section 13.5, if this
- ----                                        ------------
Agreement is terminated pursuant to Section 14.1, the parties shall
                                    ------------
have no further obligations to one another, and any agreements
which are to be terminated hereby (pursuant to the various
termination agreements to be delivered at Closing) shall continue
in full force and effect.

                           (b)  In the event of termination of this Agreement
pursuant to Sections 14.2,  14.3 or 14.4, all  obligations of the parties to one
another hereunder shall terminate,  except for the survival of  representations,
warranties and agreements  pursuant to Section 15.2, and except that the various
agreements to be terminated hereby shall continue in full force and effect,  and
provided   further  that  nothing  herein  shall  prejudice  the  ability  of  a
non-breaching party from seeking damages from any other party for

                                       58

<PAGE>



any breach of this  Agreement  pursuant to the  indemnification  provisions  set
forth in the International Escrow Agreement.


SECTION 15.                MISCELLANEOUS PROVISIONS

         15.1  Costs  and  Expenses.  International  shall  pay its  own  legal,
accounting and other  professional fees and due diligence  expenses and those of
all parties hereto in connection with the preparation,  execution,  delivery and
performance of the terms of this Agreement; provided, however, that NDA and GUCT
shall each pay 50% of the legal,  accounting and other professional fees and due
diligence  expenses  incurred by NDA if the  transaction  fails to close for any
reason,  provided  further  that if such  failure  to close is due solely to the
fault of any party other than NDA or an NDA Stockholder,  GUCT shall pay 100% of
all such expenses and fees;  and provided  further that if such failure to close
is due solely to the fault of any party  other than GUCT,  NDA shall pay 100% of
all such expenses and fees.

         15.2  Survival of Representations and Warranties.
                  (a) Except as set forth in subparagraph (b) hereof, all
of the  representations  and warranties  contained herein or in any certificate,
statement,  document  or  instrument  furnished  hereunder  or under  the  Other
Agreements shall survive (even if the party to whom any such  representation  or
warranty was made knew or had reason to know of any  misrepresentation or breach
of  warranty  at the time of  Closing)  for a period of one year  following  the
Closing Date (the "Survival Period"),  after which all liability with respect to
such  representations  and warranties shall terminate,  except as to any alleged
inaccuracy or breach thereof of which any party prior to the termination of such
period shall have advised the other in writing,  specifying in reasonable detail
the representation or warranty that is alleged to be inaccurate or breached. The
representations   and  warranties  shall  not  be  merged  into  any  agreement,
assignment  or  transfer  document  that may be  executed  and  delivered  at or
subsequent to the Closing.  The  covenants of each party shall  continue in full
force and effect in accordance with their respective terms. All  representations
and  warranties  shall be deemed to have been relied upon,  notwithstanding  any
such  investigation  or the  decision by any party to  nonetheless  complete the
Closing.

                  (b)  All  of  the   representations  and  warranties  by  GUCT
contained  herein  or in any  certificate,  statement,  document  or  instrument
furnished  hereunder  or under the other  Agreements  shall  survive  beyond the
Survival  Period until the applicable  statute of limitations in the case of any
Action against or Damages  sustained by an NDA Indemnified  Party (as such terms
are defined in the Escrow,  Indemnification and Arbitration Agreement) resulting
from,  arising out of or in respect of the transfer of the "CT Plus" assets ("CT
Plus Transfer") from JS Pathology Plc ("JSP") to UCT

                                       59

<PAGE>



under either (i) the United  Kingdom  Insolvency  Act or (ii) the United Kingdom
Companies  Act  substantially  to the  effect  that the CT Plus  Transfer  was a
transfer of assets at a below market value and a deemed  distribution  at a time
when JSP did not have sufficient distributable reserves.

                  (c) All of the  representations  and  warranties  by any party
hereto contained herein or in any certificate, statement, document or instrument
furnished  hereunder  or under the other  Agreements  shall  survive  beyond the
Survival  Period  until the  applicable  statute of  limitations  in the case of
fraud.  As used  in  this  Section  15.2(c),  the  term  "fraud"  shall  mean an
intentional  or  reckless   misrepresentation  or  breach  of  warranty,  or  an
intentional or reckless  omission to state a material fact necessary to make the
statements made, in light of the  circumstances  under which they were made, not
misleading.

         15.3 Governing Law. This Agreement  shall be governed by, and construed
and  enforced in  accordance  with,  the laws of the State of  Delaware  without
giving effect to the conflicts of laws provisions thereof.

         15.4 Notices. All notices, approvals and other communications which may
be or are required to be given,  served or sent by either party pursuant to this
Agreement,  shall be in writing and shall be  delivered  personally,  or sent by
nationally  recognized  overnight courier service, or by registered or certified
mail, return receipt requested, postage prepaid, addressed as follows:

         if to GUCT:

                  207-208 Neptune House
                  Marina Bay, Gibraltar
                  Attn: Chief Executive Officer

         with a copy to:

                  Unilabs SA
                  12, place Cornavin
                  1201 Geneva, Switzerland
                  Attn: Miguel Payro

         if to NDA:

                  260 Smith Street
                  Farmingdale, New York  11735
                  Attn:  Chief Executive Officer


                                       60

<PAGE>



         with a copy to:

                  Meltzer, Lippe, Goldstein, Wolf & Schlissel, P.C.
                  190 Willis Avenue
                  Mineola, New York  11501
                  Attn:  Richard A. Lippe, Esq.

         if to NDA Stockholders:

                  c/o David Deutsch
                  260 Smith Street
                  Farmingdale, New York 11735

         with a copy to:

                  Meltzer, Lippe, Goldstein, Wolf & Schlissel, P.C.
                  190 Willis Avenue
                  Mineola, New York  11501
                  Attn:  Richard A. Lippe, Esq.


Each party may  designate  by notice in writing as  aforesaid  a new  address to
which any notice, may thereafter be so given, served or sent. Each notice, which
shall be mailed,  sent or  delivered  in the manner  described  above,  shall be
deemed  sufficiently  given,  served,  sent or received for all purposes at such
time as it is delivered to the addressee (with the return receipt,  the delivery
receipt or, with respect to a facsimile the answer back being deemed  conclusive
confirmation of such delivery).

         15.5 Jurisdiction. The nature and jurisdiction of any legal proceedings
commenced by any party  arising out of any of the  transactions  or  obligations
contemplated  by this Agreement (not including the  International  Stockholders'
Agreement,   International  Registration  Rights  Agreement,  or  the  Poly/LIVF
Non-Competition Agreement or GUCT/UniHolding Non-Competition Agreement) shall be
as provided under the International Escrow Agreement.

         15.6  No Third Party Beneficiary.  This Agreement is entered
into, and its provisions shall be, for the sole and exclusive
benefit of the parties hereto and their respective successors and
permitted assigns.

         15.7 Sales and Transfer Taxes.  All sales and transfer taxes (including
taxes, if any,  imposed upon the transfer of any of the Outstanding or Converted
NDA shares, or the UCT or Pharmasoft Shares) and other taxes, filing,  recording
and  registration   fees  and  similar  fees  payable  in  connection  with  the
contemplated  transactions  shall  be  paid  by  International  when  due  on or
following  the Closing  Date,  except for taxes based upon the income or capital
gains of any party or parties,  with  respect to  consideration  received on the
transfer of any Outstanding or

                                       61

<PAGE>



Converted  NDA Shares or, UCT Shares or  Pharmasoft  Shares owned by such party,
which taxes will solely be the responsibility of such party.

         15.8 Assignment; Amendment; Waiver. No party shall assign any of or its
rights or  obligations  under this  Agreement  whether by written  agreement  or
operation of law,  without the prior  written  consent of (i) NDA, (ii) GUCT, on
behalf of itself  and  International;  and  (iii)  not less than a  majority  in
interest of the NDA Stockholders. This Agreement shall be binding upon and shall
inure  to the  benefit  of the  parties  and  their  respective  successors  and
permitted  assigns.  No provision of this  Agreement  may be amended,  modified,
waived,  discharged or terminated  except by written  agreement duly executed by
each of (i) NDA; (ii) GUCT, on behalf of itself and International;  and (iii) by
not less than a majority in interest of NDA  Stockholders;  and then only to the
extent  set forth in such  writing.  Neither  the  waiver by any of the  parties
hereto of a breach of or a default  under any one or more of the  provisions  of
this Agreement, nor the failure of any of the parties, on one or more occasions,
to enforce any of the provisions of this Agreement or the Other Agreements or to
exercise any right or privilege  hereunder  shall  thereafter  be construed as a
waiver of any subsequent  breach or default of a similar nature,  or as a waiver
of any such provisions, rights or privileges hereunder.

         15.9  Entire  Agreement;  Severability.  This  Agreement  embodies  and
constitutes  the entire  agreement and  understandings  between the parties with
respect to the subject  matter hereof and  supersedes and cancels any prior oral
or written  agreement,  letter of intent proposal executed or delivered by or on
behalf of any of the  parties or  understanding  related to the  subject  matter
hereof.  If any term,  provision,  covenant or  restriction of this Agreement is
held by a court  of  competent  jurisdiction  to be  illegal,  invalid,  void or
unenforceable,  then the  remainder  of the  terms,  provisions,  covenants  and
restrictions of this Agreement shall remain in full force and effect.

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

         15.11  Certain Defined Terms. As used in this Agreement, the
following terms shall have the following meanings (such meanings to
be equally applicable to both the singular and plural forms of the
terms defined):

                           (a)   "Designated   Offering"  shall  mean  a  firmly
                  underwritten   public   offering  of  equity   securities   of
                  International  in an aggregate amount in excess of $5,000,000;
                  provided that  immediately  following the consummation of such
                  offering, International's shares are listed on a United States
                  national stock exchange, the

                                       62

<PAGE>



                  National Association of Securities Dealers Automated quotation
                  National  Market or the  National  Association  of  Securities
                  Dealers Automated Quotation Small-Cap Market.

                           (b) "person" shall mean an  individual,  corporation,
                  trust,    partnership,    joint    venture,     unincorporated
                  organization,  government  agency or any  agency or  political
                  subdivision thereof, or other entity.

         15.12  Effectiveness.  This Agreement  shall become  effective upon its
execution by (a) all of the parties hereto other than the NDA Stockholders,  and
(b) NDA  Stockholders  who are the  owners  of at least  90% of the  outstanding
common  stock of NDA.  Any NDA  Stockholders  not  executing  this  Agreement as
provided in clause (b) above shall become  parties  hereto upon  execution of an
Instrument of Accession in the from attached as Annex 15.12 hereto.


                         [REMAINDER OF PAGE LEFT BLANK]

                                                        63

<PAGE>



                           PAGE INTENTIONALLY OMITTED

                                       64

<PAGE>



                           PAGE INTENTIONALLY OMITTED

                                       65

<PAGE>




         IN  WITNESS   WHEREOF,   the  undersigned  have  executed  this  Master
Combination Agreement as of the date and year first written above.


                                              NDA CLINICAL TRIAL SERVICES, INC.


                                              By: _____________________________
                                                  Name:   David Deutsch
                                                  Title:  President


                                             LONG ISLAND VENTURE FUND, L.P.


                                             By: _____________________________
                                                  Name:    Paul Lowell
                                                  Title:  General Partner


                                           POLY VENTURES II, LIMITED PARTNERSHIP

                                             By:  POLY VENTURES ASSOCIATES II,
                                                   L.P., Its general partner

                                             By: _______________________________
                                                 Name: Robert Brill
                                                 Title:  General Partner


                                            GLOBAL UNILABS CLINICAL TRIALS, LTD.


                                            By:________________________________
                                               Name:
                                              Title:

                                            -----------------------------------
                                            DAVID DEUTSCH

                                            -----------------------------------
                                            RONALD GAMBARDELLA




                                       66

<PAGE>



                                            CAIN BROTHERS & COMPANY, INC.**


                                            By:_______________________________


                                            ----------------------------------
                                            JEFFREY PRISCO**

                                            ----------------------------------
                                            MICHAEL DIMARCO**

                                            ----------------------------------
                                            JAMES WAGNER**

                                            ----------------------------------
                                            JANET A. GAMBARDELLA**

                                            ----------------------------------
                                            DEREK DEUTSCH**

                                            ----------------------------------
                                            BRIAN DEUTSCH**

                                            ----------------------------------
                                            SANFORD KRIEGER**

                                            ----------------------------------
                                            MICHAEL MARKBREITER**

                                            ----------------------------------
                                            ROBERT F. RAUCCI**

                                            ----------------------------------
                                            GAIL SCHNEIDER**

                                            ----------------------------------
                                            MELVYN C. NOVATT**


                                            DAVSTAR II MANAGED INVESTMENT
                                            CORPORATION N.V.**


                                            By:_______________________________


                                            ----------------------------------
                                            STEVEN D. BERMAN**

                                            ----------------------------------
                                            ARTHUR FEIN**

                                       67

<PAGE>




                                            ----------------------------------
                                            JOHN J. REINERT**

                                            ----------------------------------
                                            LAWRENCE KARLIN**

                                            ----------------------------------
                                            MERRILL GOODMAN**

                                            ----------------------------------
                                            DEVRA LEE DAVIS**

                                            ----------------------------------
                                            RICHARD D. MORGENSTERN**

                                            ----------------------------------
                                            ERIC JOSS**


                                             NYS SCIENCE & TECHNOLOGY
                                              FOUNDATION**


                                            By:_______________________________



                                            ----------------------------------
                                            PETER T. JOSEPH**

                                            ----------------------------------
                                            MARK J. SCHWARTZ**

                                            ----------------------------------
                                            ROBERT WEINER**

                                            ----------------------------------
                                            STEVEN DISMAN**

                                            ----------------------------------
                                            STANLEY ASNIS**


                                            ** By:_____________________________
                                                      DAVID DEUTSCH,
                                                      Attorney-In-Fact

                                       68

<PAGE>




                             Instrument of Accession

         The terms and provisions of the Master  Combination  Agreement dated as
of January __, 1997, among NDA, GUCT and various  stockholders of NDA are hereby
accepted and agreed to by the undersigned as of the date hereof.



- ------------------------                    -----------------------------------
Stockholder (Individual)                     Stockholder (Corporate/Partnership)


________________________                    By:________________________________
(Print Name)                                  (Authorized Signature)



Dated:  ________________                    _______________________________
                                            (Print Name and Title)


                                       69



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