SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 20549

                                  Schedule 13D

                    Under the Securities Exchange Act of 1934
                                (Amendment No. 2)

                                 Immunogen, Inc.
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                                (Name of Issuer)

                       Common Stock, $.01 par value share
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                         (Title of Class of Securities)

                                    45253H101
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                                 (CUSIP Number)

                            Stephen T. Burdumy, Esq.
                            Todd L. Silverberg, Esq.
                   Klehr, Harrison, Harvey, Branzburg & Ellers
                               1401 Walnut Street
                             Philadelphia, PA 19102
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                  (Name, Address and Telephone Number of Person
                Authorized to Receive Notices and Communications)

                                  August 6, 1996
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             (Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report
the acquisition which is the subject of this Schedule 13D, and is filing this
schedule because of Rule 13d-1(b)(3) or (4), check the following box [ ].

Check the following box if a fee is being paid with the statement [ ]. (A fee is
not required only if the reporting person: (1) has a previous statement on file
reporting beneficial ownership of more than five percent of the class of
securities described in Item 1; and (2) has filed no amendment subsequent
thereto reporting beneficial ownership of five percent or less of such class.)
(See Rule 13d-7.)

Note: Six copies of this statement, including all exhibits, should be filed with
the Commission. See Rule 13d-1(a) for other parties to whom copies are to be
sent.







                        (Continued on following page(s))

                                   Page 1 of 5




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CUSIP No. 45253H101                                           Page 2 of 5 Pages
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1                 NAME OF REPORTING PERSON
                  S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON

                  Capital Ventures International
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2                 CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                  (a)       [ ]

                                                                  (b)       [ ]

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3                 SEC USE ONLY


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4                 SOURCE OF FUNDS*

                  WC
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5                 CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS
                  REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)
                                                                     [ ]

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6                 CITIZENSHIP OR PLACE OF ORGANIZATION

                 Cayman Islands
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               |  7  |   SOLE VOTING POWER
  NUMBER OF    |     |   1,803,739 
   SHARES      |     |--------------------------------------------------------
BENEFICIALLY   |  8  |   SHARED VOTING POWER                              
  OWNED BY     |     |   N/A
    EACH       |     | --------------------------------------------------------
 REPORTING     |  9  |   SOLE DISPOSITIVE POWER
PERSON WITH    |     |   1,803,739
               |     |--------------------------------------------------------  
               | 10  |   SHARED DISPOSITIVE POWER
               |     |   N/A  
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   11     AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON
                         1,803,739  
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   12     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES
          CERTAIN SHARES*                                             [ ]

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   13     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11)

                         9.9%
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   14     TYPE OF REPORTING PERSON*
                         CO
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                     *SEE INSTRUCTIONS BEFORE FILLING OUT!

                                                          



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CUSIP No. 45253H101                                           Page 3 of 5 Pages
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                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                  SCHEDULE 13D

                                  Statement of
                      Reporting Persons (as defined below)

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

                                  in respect of

                                 IMMUNOGEN, INC.


                  This Report filed by Capital Ventures International ("CVI") is
the second amendment of its initial filing on Schedule 13D with respect to the
common stock, $.01 par value per share (the "Common Stock"), of Immunogen, Inc.
(the "Company").

                  This Report relates to sales by CVI of an aggregate of 859,500
shares of Common Stock. Such sales took place in open market transactions
between July 2, 1996 and August 20, 1996 at per share prices (net of brokerage
commissions) of between $3.25 and $5.75. Such sales resulted in the receipt by
CVI of aggregate net proceeds of approximately $3,826,061.00. The percentage of
shares of Common Stock reported as beneficially owned by CVI in this Report has
remained at 9.9% as the Debentures and Warrants (as defined below) held by CVI
provide that the holder thereof may never convert the Debentures or exercise
such Warrants to the extent that upon such conversion or exercise such holder
would hold in excess of 9.9% of the outstanding shares of Common Stock. As a
result of the sale of an aggregate of 859,500 shares of Common Stock, CVI
currently holds 158,500 shares of Common Stock and continues to hold the Second
Debenture and Warrants. Based on the 16,574,357 shares of Common Stock
outstanding (as of June 13, 1996), the 9.9% limitation described above limits
CVI's ownership to 1,803,739 shares of Common Stock. Assuming no increase in the
number of outstanding shares of Common Stock and CVI continues to hold the
shares of Common Stock it currently holds, the maximum number of shares into
which CVI could convert the Second Debenture and exercise the Warrants is
1,645,239.

                  The descriptions contained in this Report of certain
agreements and documents are qualified in their entirety by reference to the
completed text of such agreements and documents filed as Exhibits to the prior
filings of this Schedule 13D.

                  Items 5 and 7 are hereby amended and restated in their
entirety as follows:

Item 5. Interest in Securities of the Issuer.

                  On June 6, 1996, CVI converted the First Debenture into
1,018,000 shares of Common Stock and Warrants to acquire 509,000 shares of
Common Stock (the "First Debenture Warrants"). The conversion was effected at
the request of the Company pursuant to an Amendment Agreement dated June 6, 1996
(the "June Amendment"). In consideration for agreeing to the June Amendment, CVI
was granted warrants to purchase an additional 500,000 shares of Common Stock
(the "June Amendment Warrants"). For purposes of this Schedule 13D, Warrants are
defined as the First Debenture Warrants, the June Amendment Warrants and the
warrants issuable upon conversion of the Second Debenture (the "Second Debenture
Warrants").

                  Between July 2 and August 20, CVI sold in open market
transactions an aggregate of 859,500 shares of Common Stock. at per share prices
(net of brokerage commissions) of between $3.25 and $5.75. Such sales of Common
Stock resulted in the receipt by CVI of aggregate net proceeds of approximately
$3,826,061.00.




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CUSIP No. 45253H101                                           Page 4 of 5 Pages
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                  Pursuant to the terms of the Second Debenture and the
Warrants, the holder thereof may never convert such Debenture or exercise such
Warrants to the extent that upon such conversion or exercise such holder would
hold in excess of 9.9% of the outstanding shares of Common Stock. In addition,
the disposition of the Second Debenture and the Warrants is restricted so that,
except in limited circumstances, the holder may not dispose of during any 90 day
period a portion of the Debenture and Warrants which, if converted into Common
Stock, would represent, at the time of the transfer, in the aggregate (together
with any other Common Stock transferred), beneficial ownership by the
transferee(s) of more than 9.9% of the Common Stock then outstanding. As a
result, CVI's beneficial ownership of shares of Common Stock solely as a result
of ownership of the Debentures and Warrants may never exceed 9.9% of the
outstanding shares of Common Stock. Based on the 16,574,357 shares of Common
Stock outstanding on June 13, 1996, the 9.9% limitation limits CVI's ownership
to 1,803,739 shares of Common Stock. As a result of the sale of an aggregate of
859,500 shares of Common Stock, CVI holds an aggregate of 158,500 shares of
Common Stock. Based on such ownership, the maximum number of shares into which
CVI could convert the Second Debenture and exercise the Warrants is 1,645,239.

                  The number of shares of Common Stock issuable to CVI upon
conversion of the Second Debenture and exercise of the Warrants will fluctuate
depending on the Conversion Price from time to time in effect; provided,
however, except to the extent that shares are disposed of, the number of shares
so issuable will never be less than the number of shares issuable based on the
Fixed Conversion Price, but the aggregate number of shares so issuable can never
exceed 9.9% of the outstanding shares of Common Stock (together with any other
shares of Common Stock then owned by CVI). To the extent the Conversion Price is
less than the Fixed Conversion Price, the aggregate number of shares issuable to
CVI upon conversion of the Second Debenture and exercise of the Warrants will
increase without any action on the part of CVI, but the number of shares so
issuable can never exceed 9.9% of the outstanding shares of Common Stock
(together with any other shares of Common Stock then owned by CVI). The number
of shares of Common Stock issuable to CVI upon conversion of the Second
Debenture and exercise of the Second Debenture Warrants can be determined by
dividing the sum of the principal amount of such Debenture plus accrued interest
thereon by the Conversion Price then in effect.

                  To the best knowledge of CVI, none of the individuals listed
in Item 2 hereof beneficially owns any Common Stock other than through their
ownership interest in CVI. Neither CVI, nor to the best of CVI's knowledge, any
of the individuals listed in Item 2 hereof has effected any transactions in the
Common Stock during the past 60 days other than CVI's sale of an aggregate of
859,500 shares of Common Stock as described herein.

Item 7. Material to be Filed as Exhibits.

                    Exhibit A - Securities Purchase Agreement (together with
                    Side Letter thereto and form of the Debentures, Warrants and
                    Registration Rights Agreement).*

                    Exhibit B - Limited Power of Attorney.*

                    Exhibit C - Letter Agreement, dated as of June 6, 1996,
                    between CVI and the Company, incorporated by reference to
                    Exhibit 10.29 to the Company's current report on Form 8-K
                    dated June 6, 1996.**



- - --------------------------
*    Previously filed with the initial filing of this Statement on Schedule 13D.
**   Previously filed with the filing of Amendment No. 1 to this Statement on
     Schedule 13D.


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CUSIP No. 45253H101                                           Page 5 of 5 Pages
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                                    SIGNATURE

                 After reasonable inquiry and to the best of my knowledge and
belief, I certify that the information set forth in this statement is true,
complete and correct.


                 CAPITAL VENTURES INTERNATIONAL

                 By:  Bala International, Inc. (f/k/a Arbit, Inc.), pursuant to
                        a Limited Power of Attorney, a copy of which is filed
                        as an exhibit hereto



                 By:      /s/ Arthur Dantchik
                          -----------------------------------------------------
                           Arthur Dantchik, President


                 Date:    August 21, 1996
                          -----------------------------------------------------