<PAGE>

                                                                   Exhibit 10.18

                                  CLASS B NOTE

                        MCG COMMERCIAL LOAN TRUST 2001-1

     THIS NOTE HAS NOT BEEN AND WILL NOT BE REGISTERED UNDER THE SECURITIES ACT
OF 1933, AS AMENDED (THE "SECURITIES ACT"), OR UNDER ANY STATE SECURITIES OR
                          --------------
BLUE SKY LAW OF ANY STATE. THE HOLDER HEREOF, BY PURCHASING THIS NOTE, AGREES
THAT THIS NOTE MAY BE REOFFERED, RESOLD, PLEDGED OR OTHERWISE TRANSFERRED ONLY
IN COMPLIANCE WITH THE SECURITIES ACT AND OTHER APPLICABLE LAWS AND ONLY (1) (A)
PURSUANT TO RULE 144A UNDER THE SECURITIES ACT ("RULE 144A") TO A PERSON THAT
                                                 ---------
THE HOLDER REASONABLY BELIEVES IS A QUALIFIED INSTITUTIONAL BUYER WITHIN THE
MEANING OF RULE 44A (A "QIB"), PURCHASING FOR ITS OWN ACCOUNT OR A QIB
                        ---
PURCHASING FOR THE ACCOUNT OF A QIB, WHOM THE HOLDER HAS INFORMED, IN EACH CASE,
THAT THE REOFFER, RESALE, PLEDGE OR OTHER TRANSFER IS BEING MADE IN RELIANCE ON
RULE 144A, OR (B) IN CERTIFICATED FORM TO AN INSTITUTIONAL "ACCREDITED INVESTOR"
(WITHIN THE MEANING OF RULE 501(a)(1)-(3) OR (7) UNDER THE SECURITIES ACT)
PURCHASING FOR INVESTMENT AND NOT FOR DISTRIBUTION IN VIOLATION OF THE
SECURITIES ACT, SUBJECT TO (X) THE RECEIPT BY THE INDENTURE TRUSTEE OF A LETTER
SUBSTANTIALLY IN THE FORM PROVIDED IN THE INDENTURE AND (Y) THE RECEIPT BY THE
INDENTURE TRUSTEE OF SUCH OTHER EVIDENCE ACCEPTABLE TO THE INDENTURE TRUSTEE
THAT SUCH REOFFER, RESALE, PLEDGE OR TRANSFER IS IN COMPLIANCE WITH THE
SECURITIES ACT AND OTHER APPLICABLE LAWS, (2) IN AN OFFSHORE TRANSACTION IN
ACCORDANCE WITH RULE 903 OR RULE 904 OF REGULATION S UNDER THE SECURITIES ACT,
(3) PURSUANT TO ANOTHER EXEMPTION AVAILABLE UNDER THE SECURITIES ACT AND IN
ACCORDANCE WITH ANY APPLICABLE STATE SECURITIES LAWS, OR (4) PURSUANT TO A VALID
REGISTRATION STATEMENT. THE PURCHASE OF THIS NOTE WILL BE DEEMED A
REPRESENTATION BY THE ACQUIRER THAT EITHER: (I) IT IS NOT, AND IS NOT PURCHASING
THIS NOTE FOR, ON BEHALF OF OR WITH THE ASSETS OF, AN EMPLOYEE BENEFIT PLAN OR
OTHER RETIREMENT ARRANGEMENT WHICH IS SUBJECT TO TITLE I OF ERISA AND/OR SECTION
4975 OF THE CODE, OR (II) PTCE 95-60, PTCE 96-23, PTCE 91-38, PTCE 90-1, PTCE
84-14 OR SOME OTHER PROHIBITED TRANSACTION EXEMPTION IS APPLICABLE TO THE
PURCHASE AND HOLDING OF THIS NOTE BY THE ACQUIRER.

     UNLESS THIS NOTE IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"), TO THE ISSUER OR ITS
                                                   ---
AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY NOTE ISSUED IS
REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH OTHER NAME AS IS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF DTC (AND ANY PAYMENT IS MADE TO CEDE & CO. OR TO
SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE

<PAGE>


OF DTC), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR OTHERWISE BY OR
TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED OWNER HEREOF, CEDE & CO.,
HAS AN INTEREST HEREIN.

     THE PRINCIPAL OF THIS NOTE IS PAYABLE IN INSTALLMENTS AS SET FORTH HEREIN.
ACCORDINGLY, THE OUTSTANDING PRINCIPAL AMOUNT OF THIS NOTE AT ANY TIME MAY BE
LESS THAN THE AMOUNT SHOWN ON THE FACE HEREOF.

     THE RIGHTS OF THE HOLDER OF THIS CLASS B NOTE TO RECEIVE INTEREST ARE
SUBORDINATED TO THE RIGHTS OF THE HOLDERS OF THE CLASS A NOTES TO RECEIVE
INTEREST AND THE RIGHTS OF THE HOLDERS OF THIS CLASS B NOTE TO RECEIVE PRINCIPAL
ARE SUBORDINATED TO THE RIGHTS OF THE HOLDERS OF THE CLASS A NOTES TO RECEIVE
PRINCIPAL AND INTEREST.

                                       2

<PAGE>


REGISTERED                                                           $35,363,000

No. B-144A

                       SEE REVERSE FOR CERTAIN DEFINITIONS

                                                        CUSIP NO. 55271KAC5
                                                        ISIN NO.  US55271KAC53
                                                        Common Code No. 14102485

     MCG Commercial Loan Trust 2001-1, a business trust organized and existing
under the laws of the State of Delaware (herein referred to as the "Issuer"),
                                                                    ------
for value received, hereby promises to pay to Cede & Co., or registered assigns,
the principal sum of THIRTY FIVE MILLION THREE HUNDRED SIXTY THREE THOUSAND
DOLLARS payable on each Remittance Date in an amount equal to the result
obtained by multiplying (i) a fraction the numerator of which is the Initial
Class B Principal Balance and the denominator of which is the initial principal
balance of this Class B Note by (ii) the aggregate amount, if any, payable from
the Note Distribution Account in respect of principal on the Class B Notes
pursuant to Section 3.05 of the Indenture.
            ------------
     The principal of and interest on this Class B Note are payable in such coin
or currency of the United States as at the time of payment is legal tender for
payment of public and private debts. All payments made by the Issuer with
respect to this Class B Note shall be applied first to interest due and payable
on this Class B Note as provided above and then to the unpaid principal of this
Class B Note.

     Reference is made to the further provisions of this Class B Note set forth
on the reverse hereof, which shall have the same effect as though fully set
forth on the face of this Class B Note.

     Unless the Class B Note of authentication hereon has been executed by the
Indenture Trustee whose name appears below by manual signature, this Class B
Note shall not be entitled to any benefit under the Indenture referred to on the
reverse hereof, or be valid or obligatory for any purpose.

                                       3

<PAGE>

     IN WITNESS WHEREOF, the Issuer has caused this instrument to be signed,
manually or in facsimile, by its Responsible Officer as of the date set forth
below.

Date: December 27, 2001

                               MCG COMMERCIAL LOAN TRUST 2001-1


                               By:      WILMINGTON TRUST COMPANY, not
                                        in its individual capacity but solely as
                                        Owner Trustee under the Trust Agreement

                                        By:  /s/ Norma Cross
                                           -------------------------------------
                                                 Authorized Signatory

                INDENTURE TRUSTEE'S CERTIFICATE OF AUTHENTICATION

This is one of the Class B Notes of MCG Commercial Loan Trust 2001-1 designated
above and referred to in the within-mentioned Indenture.

Date: December 27, 2001

                               WELLS FARGO BANK MINNESOTA,
                               NATIONAL ASSOCIATION, not in its individual
                               capacity but solely as Indenture Trustee,


                               By:   /s/ Sue Dignan
                                   ---------------------------------------------
                                                 Authorized Signatory

                                       4

<PAGE>

                                [REVERSE OF NOTE]

     This Class B Note is one of a duly authorized issue of Class B Notes of the
Issuer, designated as its MCG Commercial Loan Trust Notes, Series 2001-1, Class
B (herein called the "Class B Notes"), all issued under an Indenture, dated as
                      -------------
of December 1, 2001 (such indenture, as supplemented or amended, is herein
called the "Indenture"), between the Issuer and Wells Fargo Bank Minnesota,
            ---------
National Association, as indenture trustee (the "Indenture Trustee", which term
                                                 -----------------
includes any successor Indenture Trustee under the Indenture), to which
Indenture and all indentures supplemental thereto reference is hereby made for a
statement of the respective rights and obligations thereunder of the Issuer, the
Indenture Trustee and the Holders of the Class B Notes. The Class B Notes are
subject to all terms of the Indenture. All terms used in this Class B Note that
are defined in the Indenture, as supplemented or amended, shall have the
meanings assigned to them in or pursuant to the Indenture, as so supplemented or
amended.

     Notwithstanding the foregoing, the entire unpaid principal amount of the
Class B Notes shall be due and payable on the date on which an Event of Default
shall have occurred and be continuing and the Indenture Trustee, or the Majority
Noteholders have declared the Class B Notes to be immediately due and payable in
the manner provided in Section 5.02 of the Indenture. All principal payments on
                       ------------
the Class B Notes shall be made pro rata to the Class B Noteholders entitled
thereto.

     Each Class B Noteholder or Class B Note Owner, by acceptance of a Class B
Note or, in the case of a Class B Note Owner, a beneficial interest in a Class B
Note covenants and agrees that no recourse may be taken, directly or indirectly,
with respect to the obligations of the Issuer under the Indenture on the Class B
Notes or under any certificate or other writing delivered in connection
therewith, against the Trust Depositor, the Servicer, the Indenture Trustee or
the Owner Trustee in its individual capacity or any of their Affiliates.

     On each Remittance Date, commencing January, 2002, the Indenture Trustee or
Paying Agent shall distribute to the Person in whose name this Class B Note is
registered at the close of business on the last Business Day of the month
immediately preceding a Remittance Date (the "Record Date") an amount equal to
                                              -----------
the product of the Percentage Interest of the Class B Notes evidenced by this
Class B Note and the amount required to be distributed to Holders of Class B
Notes on such Remittance Date pursuant to Section 3.05 of the Indenture.
                                          ------------
         During each Interest Accrual Period, this Class B Note will bear
interest at the Class B Note Interest Rate.

     Distributions on this Class B Note will be made by the Indenture Trustee or
Paying Agent by check mailed to the address of the Person entitled thereto as
such name and address shall appear on the Note Register or, upon written request
to the Indenture Trustee, by wire transfer of immediately available funds to the
account of the Person entitled thereto as shall appear on the Note Register
without the presentation or surrender of this Note or the making of any notation
thereon, at a bank or other entity having appropriate facilities therefor, and,
in the case of wire

                                       5

<PAGE>

transfers, at the expense of such Person unless such Person shall own of record
Class B Notes which have Initial Class B Principal Balances aggregating at least
$1,000,000.

     Notwithstanding the above, the final distribution on this Class B Note will
be made after due notice by the Indenture Trustee of the pendency of such
distribution and only upon presentation and surrender of this Class B Note at
the office or agency maintained for that purpose by the Note Registrar in New
York, New York.

     As provided in the Indenture and the Sale and Servicing Agreement, deposits
and withdrawals from the Note Distribution Account, the Principal and Interest
Account and the Reverse Fund may be made by the Indenture Trustee from time to
time for purposes other than distributions to Class B Noteholders, such purposes
including reimbursement to the Servicer of advances made, or certain expenses
incurred, by it, and investment in Permitted Instruments.

     As provided in the Indenture and subject to certain limitations therein set
forth, the transfer of this Class B Note is registrable in the Note Register
upon surrender of this Class B Note for registration of transfer at the offices
or agencies maintained by the Note Registrar in New York, New York, duly
endorsed by, or accompanied by a written instrument of transfer in form
satisfactory to, the Indenture Trustee, duly executed by the holder hereof or
such holder's attorney duly authorized in writing, and thereupon one or more new
Class B Notes in authorized denominations evidencing the same aggregate
undivided Percentage Interest will be issued to the designated transferee or
transferees.

     The Class B Note is issuable only as a registered Class B Note. As provided
in the Indenture and subject to certain limitations therein set forth, the Class
B Note is exchangeable for a new Class B Note evidencing the same undivided
ownership interest, as requested by the holder surrendering the same.

     No service charge will be made for any such registration of transfer or
exchange, but the Note Registrar may require payment of a sum sufficient to
cover any tax or other governmental charge payable in connection therewith.

     The Servicer, the Seller, the Indenture Trustee and the Note Registrar, and
any agent of any of the foregoing, may treat the person in whose name this Class
B Note is registered as the owner hereof for all purposes, and none of the
foregoing shall be affected by notice to the contrary.

     The obligations and responsibilities created by the Indenture shall
terminate upon the payment to Class B Noteholders of all amounts required to be
paid to them pursuant to the Indenture and the Sale and Servicing Agreement and
the disposition of all property held as part of the Indenture Collateral.

                                       6

<PAGE>

              SCHEDULE OF EXCHANGES OF INTERESTS IN THE GLOBAL NOTE

     The following exchanges of a part of this Global Note for an interest in
another Global Note or for an Individual Note, or exchanges of a part of another
Global Note or Individual Note for an interest in this Global Note, have been
made:

<TABLE>
<CAPTION>
           Amount of          Amount of          Principal Amount
           decrease in        increase in  of    of this Global     Signature of
           Principal Amount   Principal Amount   Note following     Responsible
Date of    of this Global     of this Global     such decrease      Officer of Note
Exchange   Note               Note               (or increase)      Registrar
--------   ----------------   ----------------   ----------------   ------------
<S>        <C>                <C>                <C>                <C>
</TABLE>

                                       7

<PAGE>

                                   ASSIGNMENT

Social Security or taxpayer I.D. or other identifying number of assignee

FOR VALUE RECEIVED, the undersigned hereby sells, assigns and transfers unto

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

--------------------------------------------------------------------------------
                         (name and address of assignee)

the within Note and all rights thereunder, and hereby irrevocably constitutes
and appoints              , attorney, to transfer said Note on the books kept
             -------------
for registration thereof, with full power of substitution in the premises.

Dated:                                                                         1
        ----------------------------        ----------------------------------

                              Signature Guaranteed:





--------
1 NOTE: The signature to this assignment must correspond with the name of the
registered owner as it appears on the face of the within Note in every
particular, without alteration, enlargement or any change whatsoever.

                                       8