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EXHIBIT 10.8

KEFLEX PRODUCTS TRANSITION AGREEMENT

     This KEFLEX PRODUCTS TRANSITION AGREEMENT (this “Agreement”) is made as of November 7,
2007 between KEF PHARMACEUTICALS, INC., a Delaware corporation (“Kef”) and MIDDLEBROOK
PHARMACEUTICALS, INC., a Delaware corporation (“MiddleBrook”).

Background Statement

     Kef and MiddleBrook are parties to an Asset Purchase Agreement, dated as of the date of this
Agreement (the “Purchase Agreement”), and the Related Agreements (as defined in the
Purchase Agreement), pursuant to which Kef will acquire from MiddleBrook assets relating to certain
Cephalexin antibiotic products marketed under the name KEFLEX. Pursuant to a separate Consignment
Agreement, dated as of the date of this Agreement (the “Consignment Agreement”),
MiddleBrook will hold on consignment Kef’s entire inventory of finished Keflex Products and sell
such Keflex Products in the ordinary course of MiddleBrook’s business. Some of the Keflex Products
to be held and sold by MiddleBrook pursuant to the Consignment Agreement will be manufactured for
MiddleBrook pursuant to a Manufacturing Agreement between MiddleBrook and Ceph International Corp.
(“Ceph”), amended September 5, 2005. Upon the termination of the Consignment Agreement, it will be
necessary for Kef to thereafter manufacture, distribute and sell the Keflex Products. This
Agreement sets forth the agreement of the parties regarding the transition of the manufacture,
distribution and sale of Keflex Products from MiddleBrook to Kef in the event of such termination.

Statement of Agreement

     1. Definitions.

     (a) Terms defined in the Purchase Agreement shall have the same meaning when used herein.

     (b) The following terms shall have the meanings set forth below.

     “Chargeback Date” means the last day of the first full month following the Transition
Date.

     “Chargebacks” has the meaning set forth in Section 4.

     “Consignment Agreement” has the meaning set forth in the Background Statement.

     “Contingent Manufacturing Assignment Agreement” has the meaning set forth in Section
2(b).

     “Keflex Products” means all dosage forms, formulations, strengths and package sizes
and types of any cephalexin antibiotic products that may be marketed now or in the future under the
NDA.

 

 

     “Lex Asset Purchase Agreement” means that certain Asset Purchase Agreement, dated as
of the date hereof, between MiddleBrook and Lex Pharmaceuticals, Inc.

     “NDA” means the approved new drug applications number 50-405 and 50-406, including all
supplements and amendments thereto.

     “Party” means either MiddleBrook or Kef and “Parties” means both MiddleBrook
and Kef.

     “Purchase Agreement” has the meaning set forth in the Background Statement.

     “Transition Date” means the date on which the Consignment Agreement terminates.

     2. Transfer of Responsibilities, Product and Books and Records. Upon the Transition
Date, MiddleBrook shall take the actions described in this Section 2.

     (a) Consigned Merchandise. As of the Transition Date, MiddleBrook shall cease all
sales and shipments of Consigned Merchandise (as defined in the Consignment Agreement) and shall
deliver to Kef any outstanding orders for Keflex Products. Within five (5) days after the
Transition Date, MiddleBrook shall dispatch all Keflex Products for delivery to Kef at such
destination(s), and in accordance with such freight instructions, as Kef may have specified in
writing not less than five (5) days prior to the date of dispatch. Kef shall pay the freight costs
for shipping the Keflex Products to Kef.

     (b) Assignment of Manufacturing Agreement. As of and after the Transition Date,
MiddleBrook shall take such actions and execute and deliver such documents as may be necessary to
carry out the terms and provisions of the Contingent Manufacturing Assignment Agreement, which is
attached as Exhibit F to the Lex Asset Purchase Agreement.

     (c) Keflex Records. As of and after the Transition Date, MiddleBrook shall transfer (i) all
records of MiddleBrook relating to the Keflex Products including all historical sales records and
(ii) a complete and accurate copy of all Technical Data Embodiments within the scope of Section
2.1(a)(i) and, if the Patent License (as defined in the Purchase Agreement) has been executed by
MiddleBrook and Kef, the Technical Data Embodiments in Section 2.1(a)(ii) of the Lex Asset Purchase
Agreement. Kef shall pay the freight costs for shipping such records to Kef. MiddleBrook may
retain copies of those records that MiddleBrook is required to maintain by any Legal Requirement or
requires for the auditing of its financial statements.

     (d) Product Labeling. As of and after the Transition Date, MiddleBrook shall grant to Kef the
right to receive, market and sell Keflex Products that have been manufactured on or before the
Transition Date and bearing a label with MiddleBrook’s name, provided such Keflex Products are sold
in unaltered form in compliance with all Regulatory Obligations before their respective expiration
dates.

     3. Products Returns. MiddleBrook shall be responsible for making any refunds relating
to returns of Keflex Products sold by MiddleBrook prior to the Transition Date and shall deliver to
Kef any Keflex Products physically returned to MiddleBrook. Kef shall be responsible for all
returns of Keflex Products sold by Kef after the Transition Date. With respect to any

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batch of Keflex Products sold both before and after the Transition Date, the financial responsibility
for returns shall be allocated between the Parties in proportion to their respective sales of each
SKU sold both before and after the Transition Date.

     4. Chargebacks and Rebates. MiddleBrook shall be responsible for and shall pay all
chargebacks and rebates related to sales of Keflex Products under arrangements of MiddleBrook with
Governmental Authorities (“Chargebacks”) that are first submitted on or before the
Chargeback Date, and Kef shall be responsible for and pay all Chargebacks that are first submitted
after the Chargeback Date.

     5. Indemnification; Insurance.

     (a) Indemnification by MiddleBrook. MiddleBrook shall defend, indemnify and hold
harmless Kef from and against all liabilities, losses, obligations, claims, judgments, awards,
relief, settlements, costs and expenses (including costs of any product recall and reasonable
attorneys’ fees, experts’ fees, investigation costs and other expenses of litigation) which Kef,
its members, managers, directors, officers, employees and representatives may suffer or incur
arising out of MiddleBrook’s use, manufacture, marketing, advertising or sale of Keflex Products.

     (b) Indemnification by Kef. Kef shall defend, indemnify and hold harmless MiddleBrook
from and against all liabilities, losses, obligations, claims, judgments, awards, relief,
settlements, costs and expenses (including costs of any product recall and reasonable attorneys’
fees, experts’ fees, investigation costs and other expenses of litigation) which MiddleBrook, its
directors, officers, employees and representatives may suffer or incur arising out of Kef’s use,
manufacture, marketing, advertising or sale of Keflex Products after the Transition Date.

     (c) Insurance. For a period of five (5) years following the Transition Date,
MiddleBrook shall maintain general liability insurance under customary pharmaceutical industry
forms and endorsements, providing product liability and contractual liability coverage, with per
occurrence limits of not less than $10,000,000. MiddleBrook shall cause the insurer(s) issuing
such policy(ies) to provide Kef with certificates of insurance evidencing the existence of such
insurance, which certificates shall provide that the insurer will notify Kef not less than thirty
(30) days prior to any expiration, non-renewal, cancellation, reduction in limits or exhaustion of
limits of such insurance.

     6. General Provisions.

     (a) Amendment; Waiver. This Agreement, including any schedules and exhibits hereto,
may be amended, modified or supplemented only by an agreement in writing signed by the Parties. No
course of dealing between the Parties or failure by a Party to exercise any right or remedy
hereunder shall constitute an amendment to this Agreement or a waiver of any other right or remedy
or the later exercise of any right or remedy.

     (b) Force Majeure. No Party shall be responsible to any other Party for any failure
or delay in performing any of its obligations under this Agreement or for other nonperformance
hereof if such delay or nonperformance is caused by fire, flood, accident, act of God or of the

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government or any country or of any state or local government, or of the public enemy of
either, or by cause unavoidable or beyond the control of such Party. In such event, the Party
affected shall use commercially reasonable efforts to resume performance of its obligations.

     (c) Headings. The section headings of this Agreement are for convenience of reference
only and shall not affect the meaning or interpretation of this Agreement in any way. This
Agreement shall be binding upon and inure to the benefit of the Parties hereto and their respective
successors and assigns.

     (d) Notices. All notices, consents, waivers and other communications hereunder shall
be in writing and shall be (i) delivered by hand, (ii) sent by facsimile transmission or (iii) sent
by a nationally recognized overnight delivery service, charges prepaid, to the address set forth
below (or such other address for a Party as shall be specified by like notice):

	 	 	 
	If to MiddleBrook, to:

	 	MiddleBrook Pharmaceuticals, Inc.
	 

	 	20425 Seneca Meadows Parkway
	 

	 	Germantown, Maryland 20876
	

	 	Attention: Edward M. Rudnic, Ph.D.
	

	 	Facsimile: (301) 944-6700
	 
	Copy to:

	 	Dewey & LeBoeuf LLP
	 

	 	1301 Avenue of the Americas
	 

	 	New York, New York 10019
	

	 	Attention: Frederick W. Kanner, Esq.
	

	 	Facsimile: (212) 259-6333
	 
	If to Kef, to:

	 	Kef Pharmaceuticals, Inc.
	 

	 	780 3rd Avenue, 37th Floor
	 

	 	New York, New York 10017
	 

	 	Attention: James E. Flynn
	 

	 	Facsimile:
	 
	 	 
	Copy to:

	 	Robinson, Bradshaw & Hinson, P.A.
	 

	 	101 North Tryon Street, Suite 1900
	 

	 	Charlotte, North Carolina 28246
	 

	 	Attention: David J. Clark
	 

	 	Facsimile: (704) 373-3990

     Each such notice or other communication shall be deemed to have been duly given and to be
effective if (A) delivered by hand, immediately upon delivery if delivered on a Business Day during
normal business hours and, if otherwise, on the next Business Day, (B) sent by facsimile
transmission, immediately upon confirmation that such transmission has been successfully
transmitted on a Business Day before or during normal business hours and, if otherwise, on the
Business Day following such confirmation, or (C) sent by a nationally recognized overnight delivery
service, on the day of delivery by such service or, if not a Business Day, on the first Business
Day after delivery. Notices and other communications sent via facsimile must be

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followed by notice delivered by hand or by overnight delivery service as set forth herein
within five (5) Business Days.

     (e) Assignment; No Third Party Rights. This Agreement and all of the provisions
hereof shall be binding upon and inure to the benefit of the Parties and their respective
successors and permitted assigns. This Agreement may not be assigned by MiddleBrook without the
prior written consent of Kef, which consent Kef may withhold or grant in its sole discretion.
Notwithstanding the preceding sentence, after the purchase of all of the capital stock of Kef by
MiddleBrook, MiddleBrook may assign this Agreement along with its entire business. Kef may assign
this Agreement to any Person who receives an assignment of Kef’s interest in the Purchase Agreement
or the Related Agreements. This Agreement and its provisions are for the sole benefit of the
Parties and their successors and permitted assigns and shall not give any other Person any legal or
equitable right, remedy or claim.

     (f) Governing Law; Venue. The execution, interpretation and performance of this
Agreement, and any disputes with respect to the transactions contemplated by this Agreement,
including any fraud claims, shall be governed by the internal laws and judicial decisions of the
State of New York, without regard to principles of conflicts of laws.

     (g) Severability. If any provision contained in this Agreement shall for any reason
be held invalid, illegal or unenforceable in any respect, such invalidity, illegality or
unenforceability shall not affect any other provision of this Agreement, and this Agreement shall
be construed as if such invalid, illegal or unenforceable provision had never been contained
herein, unless the invalidity of any such provision substantially deprives either Party of the
practical benefits intended to be conferred by this Agreement. Notwithstanding the foregoing, any
provision of this Agreement held invalid, illegal or unenforceable only in part or degree shall
remain in full force and effect to the extent not held invalid or unenforceable, and the
determination that any provision of this Agreement is invalid, illegal or unenforceable as applied
to particular circumstances shall not affect the application of such provision to circumstances
other than those as to which it is held invalid, illegal or unenforceable.

     (h) Construction. Each Party acknowledges that it and its attorneys have been given
an equal opportunity to negotiate the terms and conditions of this Agreement and that any rule of
construction to the effect that ambiguities are to be resolved against the drafting Party or any
similar rule operating against the drafter of an agreement shall not be applicable to the
construction or interpretation of this Agreement.

     (i) Related Agreement. This Agreement including the Purchase Agreement and Related
Agreements, appendices, schedules and exhibits thereto, are intended to be construed as parts of a
group of related transactions and shall be construed accordingly.

     (j) Counterparts. This Agreement may be executed in multiple counterparts, each of
which shall be deemed an original, but all of which together shall constitute one and the same
instrument. This Agreement may be executed on signature pages exchanged by facsimile, in which
event each Party shall promptly deliver to the others such number of original executed copies as
the other Party may reasonably request.

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     (k) No Joint Venture. The relationship between the Parties hereto is that of
independent contractors. Such Parties are not joint venturers, partners, principal and agent,
master and servant, employer or employee, and have no relationship other than as independent
contracting parties. Neither Party shall have the power to bind or to obligate the other in any
manner.

[Signatures are on the following page.]

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     IN WITNESS WHEREOF, the parties hereto have cause this Keflex Products Transition Agreement to
be executed by their duly authorized representatives as of the date first above written.

	 	 	 	 	 	 	 
	 	 	KEF PHARMACEUTICALS, INC.	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Peter W. Steelman	 	 
	 

	 	 	 	 	 	 
	 	 	Name: Peter W. Steelman
	 	 
	 	 	Title: President	 	 
	 
	 	 	 	 	 	 
	 	 	MIDDLEBROOK PHARMACEUTICALS, INC.	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Edward M. Rudnic	 	 
	 

	 	 	 	 	 	 
	 	 	Name: Edward M. Rudnic,
Ph.D.	 	 
	 	 	Title: President and Chief
Executive Officerexv10w9

 

EXHIBIT 10.9

CONTINGENT MANUFACTURING ASSIGNMENT AGREEEMENT

     THIS CONTINGENT MANUFACTURING ASSIGNMENT AGREEMENT (this “Assignment”), dated as of
November 7, 2007, is made by MiddleBrook Pharmaceuticals, Inc., a Delaware corporation
(“MiddleBrook”) and Lex Pharmaceuticals, Inc., a Delaware Corporation (“Lex”).

BACKGROUND STATEMENT

     MiddleBrook and Lex are parties to an Asset Purchase Agreement, dated as of the date of this
Assignment (the “Purchase Agreement”), and the Related Agreements (as defined in the
Purchase Agreement), pursuant to which (i) Lex has purchased from MiddleBrook certain assets,
including the Part 1 Assets (as such term is defined in the Purchase Agreement) and
(ii) MiddleBrook and Kef have entered into an Inventory Consignment Agreement, dated as of the date
of this Assignment (the “Consignment Agreement”), pursuant to which Kef Pharmaceuticals,
Inc. (“Kef”) has consigned the Part 1 Assets to MiddleBrook for sale by MiddleBrook in the
ordinary course of MiddleBrook’s business. Pursuant to that certain Manufacturing Agreement, as
amended, between MiddleBrook and Ceph International Corp., a Commonwealth of Puerto Rico
corporation (“Ceph”), attached as Schedule A to this Assignment (the “Manufacturing
Agreement”), MiddleBrook has contracted with Ceph to manufacture certain of the Products (as
defined in the Purchase Agreement) pursuant to purchase orders that may be submitted from time to
time by MiddleBrook. In the event that the Consignment Agreement terminates, Lex desires to
receive from MiddleBrook an assignment of its rights and obligations under the Manufacturing
Agreement and desires for Ceph to consent to such assignment. This Assignment sets out the
agreement of the parties hereto regarding the contingent assignment of the Manufacturing Agreement
from MiddleBrook to Lex.

STATEMENT OF AGREEMENT

     NOW, THEREFORE, in consideration of the premises and for other good and valuable
consideration, the receipt and sufficiency of which is acknowledged, the parties hereto agree, for
themselves, and their respective successors and assigns, as follows:

     1. Assignment. Upon the date that all of the conditions set forth in Section 2 shall
have been satisfied (the “Assignment Date”):

     (a) MiddleBrook hereby assigns all of its right, title and interest in, to and under the
Manufacturing Agreement to Lex effective upon satisfaction of the conditions set forth in
Section 2;

     (b) Lex hereby accepts such assignment and agrees to assume and perform all of the obligations
of MiddleBrook under the Manufacturing Agreement arising as of or after the Assignment Date
effective upon satisfaction of the conditions set forth in Section 2; provided, that Lex
shall have no obligation to assume, perform or discharge any obligation of MiddleBrook that was
breached prior to the Assignment Date; and

     2. Conditions to Assignment. The assignment of the Manufacturing Agreement shall
occur upon, but not before, the occurrence of both of the following two conditions, but in

 

 

no event
if MiddleBrook has exercised the right to purchase all of the capital stock of Kef pursuant to that
certain stock purchase agreement, dated as of the date hereof, between MiddleBrook and the
stockholders of Kef and Deerfield Management, L.P.:

     (a) the termination of the Consignment Agreement; and

     (b) the delivery by Lex to the Manufacturer of a written statement, signed by an officer of
Lex, that Lex is accepting the assignment of the Manufacturing Agreement pursuant to the terms and
conditions of this Assignment.

     3. No Termination or Amendment. MiddleBrook shall not terminate or amend the
Manufacturing Agreement without the written consent of Lex, which consent shall not be unreasonably
withheld, delayed or conditioned.

     4. Indemnification.

     (a) MiddleBrook shall defend, indemnify and hold harmless Lex from and against all
liabilities, losses, obligations, claims, judgments, awards, relief, settlements, costs and
expenses (including costs of any product recall and reasonable attorneys’ fees, experts’ fees,
investigation costs and other expenses of litigation) which Lex, its members, managers,
shareholders, directors, officers, employees and representatives may suffer or incur arising out of
any breach by MiddleBrook of its obligations under the Manufacturing Agreement prior to the
Assignment Date.

     (b) Lex shall defend, indemnify and hold harmless MiddleBrook from and against all
liabilities, losses, obligations, claims, judgments, awards, relief, settlements, costs and
expenses (including costs of any product recall and reasonable attorneys’ fees, experts’ fees,
investigation costs and other expenses of litigation) which MiddleBrook, its members, managers,
shareholders, directors, officers, employees and representatives may suffer or incur arising out of
any breach by Lex of its obligations under the Manufacturing Agreement on or after the Assignment
Date.

     (c) Lex agrees to assume all the obligations of MiddleBrook under the Manufacturing Agreement
arising after the Assignment Date, and to perform and observe all the covenants and conditions to
be performed or observed by MiddleBrook under the Manufacturing Agreement arising after the
Assignment Date.

     5. Amendments. This Assignment may not be modified, discharged or terminated orally
or in any manner other than by an agreement in writing signed by the parties hereto or their
respective successors and assigns.

     6. Governing Law. The execution, interpretation and performance of this Agreement,
and any disputes with respect to the transactions contemplated by this Agreement, including any
fraud claims, shall be governed by the internal laws and judicial decisions of the State of New
York, without regard to principles of conflicts of laws.

     7. Counterparts. This Assignment may be executed and delivered in any number of
counterparts, each of which, when so executed and delivered, shall be deemed to be an original and
all of which shall constitute one and the same instrument.

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     8. Related Agreements. This Assignment, the Purchase Agreement and the Related
Agreements (as defined in the Purchase Agreement), including the appendices, annexes, schedules and
exhibits thereto, are intended to be construed as parts of a group of related transactions and
shall be construed accordingly.

     9. Negotiation. Subsequent to the execution of this Assignment, MiddleBrook covenants
to exercise commercially reasonable efforts to negotiate and enter into with Ceph and Lex a
Contingent Manufacturing Assignment Agreement substantially in the form of Exhibit A attached
hereto.

[signatures on following page]

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     IN WITNESS WHEREOF, the parties hereto have caused this Contingent Manufacturing Assignment
Agreement to be executed by their duly authorized representatives as of the date first set forth
above.

	 	 	 	 	 	 	 
	 	 	MIDDLEBROOK PHARMACEUTICALS,
	 

	 	INC., a
	 	Delaware corporation
	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Edward M/ Rudnic	 	 
	 

	 	 	 	 	 	 
	 

	 	Name: Edward M. Rudnic,
Ph.D.	 	 
	 

	 	Title: President and Chief
Executive Officer	 	 
	 
	 	 	 	 	 	 
	 	 	LEX PHARMACEUTICALS INC., a Delaware
	 

	 	corporation
	 	 
	 
	 	 	 	 	 	 
	 

	 	By:
	 	/s/ Peter W. Steelman	 	 
	 

	 	 	 	 	 	 
	 

	 	Name: Peter W. Steelman	 	 
	 

	 	Title: President	 	 

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