Document:

Letter Agreement dated 9/10/07 between the Company and Ethos Global Management

 EXHIBIT 10.4 
 September 10, 2007 
 ETHOS GLOBAL MANAGEMENT 
 c/o Jacques Matte 
 Matte Bouchard Law Firm 
 1, Westmount Square, Suite 2000 
 Westmount (Quebec) 
 Canada, H3Z 2P9 
  

	 	Re:	Compensation Arrangements 

 Gentlemen: 
 We are writing to confirm our understanding. 
  

	1.	Compensation for Services 

 In consideration
of the services provided by Ethos Global Management, a trust organized under the laws of Antigua (“EGM”) in support of the offering and sale of at least $3,000,000 and not more than $11,000,000 of Series C stock by Avicena Group,
Inc. (the “Company”), including making introductions of funding sources to certain current, off-shore stockholders, the Company’s Board of Directors has approved the payment to your firm of a one-time fee in the minimum amount
of $786,000 and the maximum amount of $1,350,000 (the “Success Fee”). The minimum Success Fee shall be due in connection with a sale of at least $3,000,000 of Series C stock, and an additional $100,000 shall be due for each
$1,000,000 of additional gross sales proceeds, up to the maximum Success Fee, which shall be due if the Company sells $11,000,000 or more of Series C stock . Payment of the Success Fee will be in full and complete discharge of all obligations which
the Company owes or may owe to EGM, its directors, officers, employees, stockholders, trustees, settlors, beneficiaries and all other EGM affiliates and associates (collectively, the “EGM Parties”) in connection with any efforts by
any of them relating to, but not limited to, the investment in the Company’s securities by Jacques Matte in trust, Martin Doane in trust, Oussama Salam, Essam Alamdar, Oleander Marketing Corp., or H.K. Properties. None of the EGM Parties shall
be entitled to any options, warrants or other equity-based compensation in connection with their services, and the Company shall not be responsible for the reimbursement of any expenses incurred by or on behalf of any of the EGM Parties beyond
$10,000. 
  

	2.	Representations of EGM 

  

	 	2.1.	Power and Authority 

  

 Ethos Global Management 
 September 10, 2007 
 Page 2 
 EGM
has all requisite power and authority to enter into this Agreement and perform the services. This Agreement has been duly and validly authorized, executed and delivered by EGM and constitutes the legal, valid and binding agreement of EGM,
enforceable against EGM in accordance with its terms, subject to bankruptcy law and general principles of equity. 
  

	 	2.2.	General Solicitation 

 In conducting its services,
the EGM Parties employed no form of general solicitation or general advertising in connection with any of the Company’s securities. 
  

	 	2.3.	Offering Circulars 

 Neither EGM nor its
representatives included any non-public information about the Company in any offering circular or private placement memorandum used in connection with EGM’s provision of its services. 
  

	 	2.4.	Non-Related Parties 

 No director, officer or
stockholder of the Company, and no member of the immediate family (including children, step-children, parents, step-parents, spouses, siblings, in-laws, and persons sharing the household) of any of the foregoing persons (collectively, the
“Avicena Parties”), is a director, officer, employee, trustee, settler, beneficiary or equity owner of EGM, and no Avicena Party has any interest, directly or indirectly, in the Success Fee. 
  

	3.	Representations of the Company 

 The Company
has all requisite power and authority to enter into this Agreement and perform its obligations hereunder. This Agreement has been duly and validly authorized, executed and delivered by the Company and constitutes the legal, valid and binding
agreement of the Company, enforceable against the Company in accordance with its terms, subject to bankruptcy law and general principles of equity. 
  

	4.	Indemnification 

 EGM and the Company each
agree to indemnify, defend and hold the other harmless from all losses (including reasonable attorneys fees) arising out of, based upon or relating to, in whole or in part, any breach of the forgoing representations. 
  

	5.	Miscellaneous 

  

	 	5.1.	Parties in Interest, Successors and Assigns 

 This
Agreement is made solely for the benefit of EGM and the Company and their respective directors and officers. No other person shall acquire or have any right under or by virtue of this Agreement. Neither party may assign its rights or delegate its
duties hereunder without the prior written consent of the other party. This Agreement 
  

 Ethos Global Management 
 September 10, 2007 
 Page 3 
  
 shall inure to the benefit of and be binding upon any permitted successors and assigns of each of the parties. 
  

	 	5.2.	Counterparts 

 This Agreement may be executed by
the parties hereto in separate counterparts, each of which when so executed shall be deemed to be an original and all of which taken together shall constitute one and the same agreement. 
  

	 	5.3.	Headings 

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

	 	5.4.	Entire Agreement 

 The Parties intend this
Agreement to be the final expression of, and a complete and exclusive statement of, the agreement and understanding of the parties hereto in respect of the subject matter contained herein. There are no restrictions, promises, warranties or
undertakings, other than those set forth or referred to herein. This Agreement supersedes all prior agreements and understandings between the parties with respect to such subject matter. 
  

	 	5.5.	Notices 

 Any notice, demand, or other
communication required or permitted to be given hereunder shall be in writing and shall be effective (a) upon actual delivery by hand or nationally recognized overnight courier (if delivered on a business day during normal business hours where
such notice is to be received), or the first business day following such delivery (if delivered other than on a business day during normal business hours where such notice is to be received) or (b) on the third business day following the date
it is mailed, by certified mail, return receipt requested, to the other party at the address specified in this Section. Notices to EGM shall be sent to the address indicated on page 1. Notices to the Company shall be sent to the attention of the
Chief Executive Officer at 228 Hamilton Avenue, 3rd Floor, Palo Alto, CA 94301, with a copy to Barack Ferrazzano Kirschbaum & Nagelberg LLP, 200 W. Madison Street, Suite 3900, Chicago, Illinois 60606, Attn: Lance R. Rogers 
  

	    5.6.	Survival The parties agree that the representations, warranties and agreements made by each of them in this Agreement shall remain in full force and effect and shall survive
the delivery of, and payment for, the Company’s securities. 

  

 Ethos Global Management 
 September 10, 2007 
 Page 4 
  
 If this Agreement is satisfactory to you, please so indicate by signing the acceptance of this Agreement and deliver such counterpart, whereupon this
Agreement will become binding between us in accordance with its terms. 
  

			
	 Very truly yours,
  
 AVICENA GROUP, INC.

		
	By:	 	/s/ Nasser Menhall
		 	 Print Name: Nasser Menhall
 Title:
Chairman

  
  
  
  

			
	 AGREED AND ACCEPTED THIS __ DAY OF SEPTEMBER, 2007
  

ETHOS GLOBAL MANAGEMENT

		
	By:	 	/s/ Jacques Matte
		
	 Print Name:
	 	Jacques Matte
		
	 Title: 
	 	LawyerFourt Supplemental Indenture

 Exhibit 4.2 
 Execution Copy 
  

  
 ONEOK PARTNERS, L.P. 
 Issuer 
  
  
 ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP 
 Guarantor 
  
  
 and 
  
  
 WELLS FARGO BANK, N.A. 
 Trustee

  
  
 FOURTH SUPPLEMENTAL INDENTURE 
 Dated as of September 28, 2007 
  
  
 to 

  
  
 INDENTURE 
 relating to Senior Debt Securities 
 Dated as of September 25, 2006 
  
  

6.85% Senior Notes due 2037 
  
  

  

 TABLE OF CONTENTS 
  

			
	  	  	Page
		
	 ARTICLE 1 Relation to Indenture; Definitions
	  	1
	 SECTION 1.01. Relation to Indenture.
	  	1
	 SECTION 1.02. Definitions.
	  	1
	 SECTION 1.03. General References.
	  	1
		
	 ARTICLE 2 The Series of Debt Securities
	  	2
	 SECTION 2.01. The Form and Title of the Debt Securities.
	  	2
	 SECTION 2.02. Amount.
	  	2
	 SECTION 2.03. Stated Maturity.
	  	2
	 SECTION 2.04. Interest and Interest Rates.
	  	2
	 SECTION 2.05. Optional Redemption.
	  	2
	 SECTION 2.06. Guarantee.
	  	3
	 SECTION 2.07. Global Securities.
	  	3
		
	 ARTICLE 3 Miscellaneous
	  	3
	 SECTION 3.01. Certain Trustee Matters.
	  	3
	 SECTION 3.02. Continued Effect.
	  	4
	 SECTION 3.03. Governing Law.
	  	4
	 SECTION 3.04. Counterparts.
	  	4

 EXHIBITS 
 Exhibit A:    Form of Note 
  

 FOURTH SUPPLEMENTAL INDENTURE, dated as of September 28, 2007 (this “Supplemental
Indenture”), among ONEOK PARTNERS, L.P., a Delaware limited partnership (the “Partnership”), ONEOK PARTNERS INTERMEDIATE LIMITED
PARTNERSHIP, a Delaware limited partnership (the “Guarantor”), and WELLS FARGO BANK, N.A., as trustee under the Indenture referred to below
(in such capacity, the “Trustee”). 
 RECITALS OF THE PARTNERSHIP 
 WHEREAS, the Partnership and the Trustee have heretofore entered into an Indenture, dated as of September 25, 2006 (the “Original
Indenture”) (the Original Indenture, as amended and supplemented from time to time, including without limitation pursuant to this Supplemental Indenture, being referred to herein as the “Indenture”); and

 WHEREAS, under the Original Indenture, a new series of Debt Securities may at any time be established by the Board of Directors of ONEOK
Partners GP, L.L.C., the Partnership’s general partner (the “General Partner”), in accordance with the provisions of the Original Indenture, and the terms of such series may be established by an indenture supplemental to
the Original Indenture; and 
 WHEREAS, the Partnership proposes to create under the Indenture a new series of Debt Securities; and

 WHEREAS, all acts and things necessary to make the Notes (as herein defined), when executed by the General Partner on behalf of the
Partnership and authenticated and delivered by the Trustee as provided in the Original Indenture and this Supplemental Indenture, the valid and binding obligations of the Partnership and to make this Supplemental Indenture a valid and binding
agreement in accordance with the Original Indenture have been done or performed; 
 NOW, THEREFORE, in consideration of the premises,
agreements and obligations set forth herein and for other good and valuable consideration, the receipt and sufficiency of which are hereby acknowledged, the parties hereto hereby agree, for the equal and proportionate benefit of all Holders of the
Notes, as follows: 
 ARTICLE 1 
 RELATION TO INDENTURE; DEFINITIONS 
 SECTION
1.01.  Relation to Indenture. 
 With respect to the Notes, this Supplemental Indenture constitutes an
integral part of the Indenture. 
 SECTION 1.02.  Definitions. 
 For all purposes of this Supplemental Indenture, capitalized terms used herein and not otherwise defined herein shall have the meanings assigned thereto
in the Original Indenture. 
 SECTION 1.03.  General References. 
 All references in this Supplemental Indenture to Articles and Sections, unless otherwise specified, refer to the corresponding Articles and Sections of
this Supplemental Indenture; and the term “herein”, “hereof”, “hereunder” and any other word of similar import refers to this Supplemental Indenture. 
  

 ARTICLE 2 
 THE SERIES OF DEBT SECURITIES 
 SECTION 2.01. The Form and Title of the Debt Securities. 
 There is hereby established a new series of
Debt Securities to be issued under the Indenture and to be designated as the Partnership’s 6.85% Senior Notes due 2037 (the “Notes”). The Notes shall be substantially in the form attached as Exhibit A hereto,
in each case with such appropriate insertions, omissions, substitutions and other variations as are required or permitted by the Indenture, and may have such letters, numbers or other marks of identification and such legends or endorsements placed
thereon as the Partnership may deem appropriate or as may be required or appropriate to comply with any laws or with any rules made pursuant thereto or with the rules of any securities exchange or automated quotation system on which the Notes may be
listed or traded, or to conform to general usage, or as may, consistently with the Indenture, be determined by the officers executing such Notes, as evidenced by their execution thereof. 
 The Notes shall be executed, authenticated and delivered in accordance with the provisions of, and shall in all respects be subject to, the terms,
conditions and covenants of the Original Indenture as supplemented by this Supplemental Indenture (including the form of Note set forth as Exhibit A hereto (the terms of which are incorporated in and made a part of this Supplemental
Indenture for all intents and purposes)). 
 SECTION 2.02. Amount. 
 The aggregate principal amount of the Notes which may be authenticated and delivered pursuant hereto is unlimited. The Trustee shall initially
authenticate and deliver Notes for original issue in an initial aggregate principal amount of up to $600,000,000 upon delivery to the Trustee of a Partnership Order for the authentication and delivery of such Notes. The aggregate principal amount of
the Notes to be issued hereunder may be increased at any time hereafter and the series may be reopened for issuances of additional Notes upon Partnership Order without the consent of any Holder. The Notes issued on the date hereof and any such
additional Notes that may be issued hereafter shall be part of the same series of Debt Securities for all purposes under the Indenture. 
 SECTION 2.03. Stated Maturity. 
 The Notes may be issued on any Business Day on or after
September 28, 2007, and the Stated Maturity of the Notes shall be October 15, 2037. 
 SECTION 2.04. Interest and
Interest Rates. 
 The rate or rates at which the Notes shall bear interest, the date or dates from which such interest shall
accrue, the interest payment dates on which any such interest shall be payable and the regular record date for any interest payable on any interest payment date, in each case, shall be as set forth in the form of Note set forth as
Exhibit A hereto. 
 SECTION 2.05. Optional Redemption. 
 At its option, the Partnership may redeem the Notes, in whole or in part, in principal amounts of $2,000 and in multiples of $1,000 in excess thereof, at
any time or from time to time, at the applicable redemption price determined as set forth in the form of Note attached hereto as Exhibit A, in accordance with the terms set forth in the Notes and in accordance with Article III of the Original
Indenture. 
  

 2 

 SECTION 2.06. Guarantee. 
 Except as provided below, Article XII of the Original Indenture shall apply to the Notes. For the purposes of this Supplemental Indenture and the
Notes (including without limitation the provisions of the Original Indenture to the extent applicable thereto), the term “Guarantor” shall mean ONEOK Partners Intermediate Limited Partnership, a Delaware limited partnership, and any
successor Person thereto under the Indenture. 
 With respect to the Notes, paragraph (a) of Section 12.04 of the Original
Indenture is hereby amended and restated in its entirety as set forth below; provided, however that the amendment and restatement set forth below in this Section 2.06 shall apply only to the Notes and not to any other series of Debt
Securities issued under the Original Indenture: 
 “(a) Notwithstanding anything to the contrary in this Article XII, if any Guarantor
shall cease to be a Subsidiary of the Partnership, then, if no Default or Event of Default shall have occurred and be continuing, such Guarantor, upon giving notice to the Trustee to the foregoing effect, shall be deemed to be released from all of
its obligations under this Indenture, and the Guarantee shall be of no further force or effect with respect to such Guarantor. Following the receipt by the Trustee of any such notice, the Partnership shall cause this Indenture to be amended as
provided in Section 9.01(l) hereof; provided, however, that the failure to so amend this Indenture shall not affect the validity of the termination of the Guarantee with respect to such Guarantor.” 
 The Guarantor’s address and telecopier number for the purposes of Section 13.03 of the Original Indenture is: 
 ONEOK Partners Intermediate Limited Partnership 

	 	c/o	ONEOK Partners GP, L.L.C. 

	 	    	100 West Fifth Street, Suite 1831 

	 	    	Tulsa, Oklahoma 74103-4298 

	 	    	Telecopier No.: (918) 588-7800 

	 	    	Attention: Chief Financial Officer 

 SECTION 2.07.
Global Securities. 
 The Notes shall initially be issuable in whole or in part in the form of one or more Global
Securities. Such Global Securities (i) shall be deposited with, or on behalf of, The Depository Trust Company, which shall act as Depositary with respect to the Notes, (ii) shall bear the legends applicable to Global Securities set forth
in Section 2.15(a) of the Original Indenture, (iii) may be exchanged in whole or in part for Notes in definitive form upon the terms and subject to the conditions provided in Section 2.15(b) of the Original Indenture and in this
Supplemental Indenture and (iv) shall otherwise be subject to the applicable provisions of the Indenture. 
 ARTICLE 3 

MISCELLANEOUS 
 SECTION 3.01. Certain Trustee Matters. 
 The recitals contained herein shall be taken as the statements
of the Partnership, and the Trustee assumes no responsibility for their correctness. 
 The Trustee makes no representations as to the
validity or sufficiency of this Supplemental Indenture or the Notes or the proper authorization or the due execution hereof or thereof by the Partnership. 
  

 3 

 Except as expressly set forth herein, nothing in this Supplemental Indenture shall alter the duties,
rights or obligations of the Trustee set forth in the Original Indenture. 
 The Trustee makes no representation or warranty as to the
validity or sufficiency of the information contained in the prospectus supplement related to the Notes, except such information which specifically pertains to the Trustee itself, or any information incorporated therein by reference. 
 SECTION 3.02. Continued Effect. 
 Except as expressly supplemented and amended by this Supplemental Indenture, the Original Indenture shall continue in full force and effect in accordance with the provisions thereof, and the Original Indenture (as
supplemented and amended by this Supplemental Indenture) is in all respects hereby ratified and confirmed. This Supplemental Indenture and all its provisions shall be deemed a part of the Original Indenture in the manner and to the extent herein and
therein provided. 
 SECTION 3.03. Governing Law. 
 This Supplemental Indenture and the Notes shall be governed by and construed in accordance with the laws of the State of New York. 
 SECTION 3.04. Counterparts. 
 This instrument may be executed in any number of counterparts, each of which, when delivered, shall be deemed to be an original, but all such counterparts shall together constitute but one and the same instrument.

 (Signature Page Follows) 
  

 4 

 IN WITNESS WHEREOF, the parties hereto have caused this Supplemental Indenture to be duly executed and
delivered, all as of the day and year first above written. 
  

			
	ONEOK PARTNERS, L.P.
		
	By:	 	ONEOK Partners GP, L.L.C.,
		 	its General Partner
		
	By:	 	/s/ Curtis L. Dinan
	Name:	 	Curtis L. Dinan
	Title:	 	Senior Vice President, Chief Financial Officer and Treasurer
	
	ONEOK PARTNERS INTERMEDIATE LIMITED PARTNERSHIP
		
	By:	 	ONEOK ILP GP, L.L.C.,
		 	its General Partner
		
	By:	 	/s/ Curtis L. Dinan
	Name:	 	Curtis L. Dinan
	Title:	 	Senior Vice President, Chief Financial Officer and Treasurer
	
	 WELLS FARGO BANK, N.A.,
 as
Trustee

		
	By:	 	/s/ Timothy P. Mowdy
	Name:	 	Timothy P. Mowdy
	Title:	 	Vice President

  

 Fourth Supplemental Indenture Signature Page 

 EXHIBIT A 
 [FORM OF FACE OF NOTE] 
 [If a Global Security, insert—UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION (“DTC”), NEW YORK, NEW YORK, TO THE PARTNERSHIP OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT, AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF
CEDE & CO. OR 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 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.] 
 [If a Global Security, insert—TRANSFERS OF THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN PART, TO NOMINEES OF DTC OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR’S NOMINEE, AND TRANSFERS OF PORTIONS OF
THIS GLOBAL SECURITY SHALL BE LIMITED TO TRANSFERS MADE IN ACCORDANCE WITH THE RESTRICTIONS SET FORTH IN THE INDENTURE REFERRED TO HEREIN.] 
 ONEOK PARTNERS, L.P. 
 6.85% Senior Note due 2037 
  

			
	 No. _____
	  	U.S.$_______________

 CUSIP No. 68268NAD5 
 ONEOK PARTNERS, L.P., a Delaware limited partnership (herein called the “Partnership”, which term includes any successor Person under the Indenture hereinafter referred to), for value received, hereby
promises to pay to             , or registered assigns, the principal sum of              United States Dollars on
October 15, 2037, and to pay interest thereon from September 28, 2007, or from the most recent interest payment date to which interest has been paid or duly provided for, semi-annually on April 15 and October 15 in each year,
commencing on April 15, 2008, at the rate of 6.85% per annum, until the principal hereof is paid or made available for payment and at the same rate per annum on any overdue principal and premium and on any overdue installment of interest.
The amount of interest payable for any period shall be computed on the basis of twelve 30-day months and a 360-day year. The amount of interest payable for any partial period shall be computed on the basis of a 360-day year of twelve 30-day months
and the days elapsed in any partial month. In the event that any date on which interest is payable on this Note is not a Business Day, then a payment of the interest payable on such date will be made on the next succeeding day which is a Business
Day (and without any interest or other payment in respect of any such delay) with the same force and effect as if made on the date the payment was originally payable. The interest so payable, and punctually paid or duly provided for, on any interest
payment date will, as provided in such Indenture, be paid to the Person in whose name this Note (or one or more predecessor Notes) is registered at the close of business on the regular record date for such interest, which record date shall be the
April 1 or October 1 (whether or not a Business Day), as the case may be, next preceding such interest payment date. Any such interest not so punctually paid or duly provided for shall forthwith cease to be payable to the Holder on such
regular record date and may either be paid to the Person in whose name this Note (or one or more predecessor Notes) is registered at the close of business on a special record date for the payment of such Defaulted Interest to be fixed by the
Trustee, notice of which shall be given to Holders of Notes not less than 10 days prior to such special record date, or be paid at any time in any other lawful manner not inconsistent with the requirements of any securities exchange or automated
quotation system on which the Notes may be listed or traded, and upon such notice as may be required by such exchange or automated quotation system, all as more fully provided in the Indenture. 
 [If a Global Security, insert—Payment of the principal of (and premium, if any) and any such interest on this Note will be made by transfer of
immediately available funds to a bank account in the United States of America designated by the Holder to the Paying Agent in U.S. Dollars.] 
  

 A-1 

 [If a definitive Debt Security, insert—Payment of the principal of (and premium, if any) and any
such interest on this Note will be made at the office or agency of the Partnership maintained for that purpose in U.S. Dollars or subject to any laws or regulations applicable thereto and to the right of the Partnership (as provided in the
Indenture) to rescind the designation of any such Paying Agent, at the offices of
                            , and at such other offices or agencies as the Partnership may designate,
by U.S. Dollar check drawn on, or transfer to a U.S. Dollar account maintained by the payee with, a bank in The City of New York (so long as the applicable Paying Agent has received proper transfer instructions in writing at least 10 days
prior to the payment date); provided, however, that payment of interest may be made at the option of the Partnership by U.S. Dollar check mailed to the addresses of the Persons entitled thereto as such addresses shall appear in the Debt
Security Register or by transfer to a U.S. Dollar account maintained by the payee with a bank in The City of New York (so long as the applicable Paying Agent has received proper transfer instructions in writing by the record date prior to the
applicable interest payment date).] 
 Reference is hereby made to the further provisions of this Note set forth on the reverse hereof, which
further provisions shall for all purposes have the same effect as if set forth at this place. 
 Unless the certificate of authentication
hereon has been executed by the Trustee referred to on the reverse hereof by manual signature, this Note shall not be entitled to any benefit under the Indenture or be valid or obligatory for any purpose. 
 IN WITNESS WHEREOF, the Partnership has caused this instrument to be duly executed. 
 Dated:                     ,             

  

					
	ONEOK PARTNERS, L.P.
		
	By:	 	 ONEOK Partners GP, L.L.C.
 its General
Partner

			
		 	By:	 	 
		 	Name:	 	
		 	Title:	 	

  

 A-2 

 TRUSTEE’S CERTIFICATE OF AUTHENTICATION 
 This is one of the Debt Securities of the series designated therein referred to in the within-mentioned Indenture. 
  

			
	 WELLS FARGO BANK, N.A.,
 as
Trustee

		
	By:	 	 
		 	     Authorized Signatory

  

 A-3 

 [REVERSE OF NOTE] 
 ONEOK PARTNERS, L.P. 
 6.85% Senior Note due 2037 
 This security is one of a duly authorized issue of debt securities of the Partnership (the “Debt Securities”), issued and to be issued in one
or more series under an Indenture dated as of September 25, 2006, as amended and supplemented to date, including without limitation by the Fourth Supplemental Indenture thereto, dated as of September 28, 2007 (such Indenture, as so amended
and supplemented being referred to herein as the “Indenture”), between the Partnership and Wells Fargo Bank, N.A., as Trustee (the “Trustee,” which term includes any successor trustee under the Indenture), to which Indenture and
all indentures supplemental thereto reference is hereby made for a statement of the respective rights, limitations of rights, obligations, duties and immunities thereunder of the Partnership, the Trustee and the Holders of the Debt Securities and of
the terms upon which the Debt Securities are, and are to be, authenticated and delivered. This Debt Security is one of the series designated on the face hereof. The Debt Securities of this series are referred to herein as the “Notes.”

 The Notes will be subject to redemption at any time at the option of the Partnership, in whole or in part, at a redemption price equal to
the principal amount of the Notes to be redeemed, plus any accrued and unpaid interest thereon to the applicable Redemption Date (subject to the right of holders of record on the relevant record date to receive interest due on an Interest Payment
Date that is on or prior to the Redemption Date) plus the “Make-Whole Premium” as defined below. 
 The “Make-Whole
Premium” or “premium” with respect to any Note to be redeemed shall be equal to the excess, if any, of: (a) the sum of the present values, calculated as of the Redemption Date, of (i) each interest payment that, but for such
redemption, would have been payable on the Note or portion thereof being redeemed on each interest payment date occurring after the Redemption Date (excluding any accrued interest for the period prior to the Redemption Date); and (ii) the
principal amount that, but for such redemption, would have been payable at the final maturity of the Note being redeemed; over (b) the principal amount of the Note being redeemed. 
 The present values of interest and principal payments referred to in clause (a) of the immediately preceding paragraph will be determined in
accordance with generally accepted principles of financial analysis. These present values will be calculated by discounting the amount of each payment of interest or principal from the date that each such payment would have been payable, but for the
redemption, to the Redemption Date at a discount rate equal to the Comparable Treasury Yield (as defined below) plus 30 basis points. The Make-Whole Premium will be calculated by an independent investment banking institution of national standing
appointed by the Partnership. If the Partnership fails to appoint an independent investment banker not less than 30 days prior to the Redemption Date, or if such independent investment banker is unwilling or unable to make the calculation, the
calculation will be made by Wachovia Capital Markets, LLC, Greenwich Capital Markets, Inc. and UBS Securities LLC. If Wachovia Capital Markets, LLC, Greenwich Capital Markets, Inc. and UBS Securities LLC are unwilling or unable to make the
calculation, the Partnership will appoint an independent investment banking institution of national standing to make the calculation. 
 For
purposes of determining the Make-Whole Premium, “Comparable Treasury Yield” means a rate of interest per annum equal to the weekly average yield to maturity of United States Treasury Securities that have a constant maturity that
corresponds to the remaining term to maturity of the Notes, calculated to the nearest 1/12th of a year. The Comparable Treasury Yield will be determined as of the third business day immediately preceding the applicable Redemption Date, and prior to
the Redemption Date the Partnership shall deliver to the Trustee an Officers’ Certificate setting forth the redemption price and showing the calculation thereof in reasonable detail. 
 The weekly average yields of United States Treasury Securities will be determined by reference to the most recent statistical release published by the
Federal Reserve Bank of New York and designated “H.15(519) Selected Interest Rates” or any successor release. If the H.15 statistical release sets forth a weekly average yield for United States Treasury Securities having a constant
maturity that is the same as the remaining term calculated as set forth above, then the Comparable Treasury Yield will be equal to such weekly average yield. In all other cases, the Comparable Treasury Yield will be calculated by interpolation on a
straight-line basis between the weekly average yields on the United States Treasury Securities that have a constant maturity closest to and greater than the remaining term and the United States Treasury Securities that have a constant maturity
closest to and less than the remaining term (in each case as set forth in the H.15 statistical release or any successor release). Any weekly 

  

 A-4 

 
average yields calculated by interpolation will be rounded to the nearest 1/100th of 1%, with any figure of 1/200th of 1% or above being rounded upward. If
weekly average yields for United States Treasury Securities are not available in the H.15 statistical release or otherwise, then the Comparable Treasury Yield will be calculated by interpolation of comparable rates selected by an independent
investment banking institution of national standing selected in the manner described in the second preceding paragraph. 
 Unless the
Partnership defaults in payment of the redemption price, on and after the date of redemption, interest will cease to accrue on this Note or the portions hereof called for redemption. 
 In the event of redemption of this Note in part only, a new Note or Notes of like tenor for the unredeemed portion hereof will be issued in the name of
the Holder hereof upon the cancellation hereof. 
 The Indenture contains provisions for defeasance at any time of (1) the entire
indebtedness of this Note or (2) certain restrictive covenants and Events of Default with respect to this Note, in each case upon compliance with certain conditions set forth in the Indenture. 
 If an Event of Default with respect to the Notes shall occur and be continuing, the principal of the Notes may be declared due and payable in the manner
and with the effect provided in the Indenture. 
 The Indenture permits, with certain exceptions as therein provided, the amendment thereof
and the modification of the rights and obligations of the Partnership, the Guarantor and the rights of the Holders of the Debt Securities of each series to be affected under the Indenture at any time by the Partnership, the Guarantor and the Trustee
with the consent of not less than the Holders of a majority in principal amount of the Outstanding Debt Securities of each series to be affected. The Indenture also contains provisions permitting the Holders of a majority in principal amount of the
Outstanding Debt Securities of each affected series, on behalf of the Holders of all Debt Securities of such series, to waive compliance by the Partnership and the Guarantor with certain provisions of the Indenture. The Indenture permits, with
certain exceptions as therein provided, the Holders of a majority in principal amount of Debt Securities of any series then Outstanding to waive past defaults under the Indenture with respect to such series and their consequences. Any such consent
or waiver by the Holder of this Note shall be conclusive and binding upon such Holder and all holders of Notes of which this Note is a predecessor Note, whether or not notation of such consent or waiver is made upon this or any other Note.

 As provided in and subject to the provisions of the Indenture, the Holder of this Note shall not have the right to institute any action or
proceeding with respect to the Indenture or for the appointment of a receiver or trustee or for any other remedy thereunder, unless such Holder shall have previously given the Trustee written notice of a continuing Event of Default with respect to
the Notes, the Holders of not less than 25% in aggregate principal amount of the Notes at the time Outstanding shall have made written request to the Trustee to institute proceedings in respect of such Event of Default and offered the Trustee
reasonable indemnity or security as required by the Trustee and the Trustee shall not have received from the Holders of a majority in principal amount of Notes at the time Outstanding a direction inconsistent with such request, and the Trustee shall
have failed to institute any such proceeding for 60 days after receipt of such notice, request and offer of indemnity or security. The foregoing shall not apply to any suit instituted by the Holder of this Note for the enforcement of any payment of
principal hereof or any premium or interest hereon on or after the respective due dates expressed herein. 
 No reference herein to the
Indenture and no provision of this Note or of the Indenture shall alter or impair the obligation of the Partnership, which is absolute and unconditional, to pay the principal of and any premium and interest on this Note at the times, place(s) and
rate, and in the currency, herein prescribed. 
 [If a Global Security, insert—This Global Security or portion hereof may not be
exchanged for definitive Debt Securities of this series except in the limited circumstances provided in the Indenture. 
 The holders of
beneficial interests in this Global Security will not be entitled to receive physical delivery of definitive Debt Securities except as described in the Indenture and will not be considered the Holders thereof for any purpose under the Indenture.]

 [If a definitive Debt Security, insert—As provided in the Indenture and subject to certain limitations therein set forth, the
transfer of this Note is registerable in the Debt Security Register, upon surrender of this Note for registration of transfer at the office or agency of the Partnership in The City of New York, or, subject to any laws or 

  

 A-5 

 
regulations applicable thereto and to the right of the Partnership (limited as provided in the Indenture) to rescind the designation of any such transfer
agent, at the offices of                      in the Borough of Manhattan, The City of New York, and at such other offices or agencies as the
Partnership may designate, duly endorsed by, or accompanied by a written instrument of transfer in form satisfactory to the Partnership and the Debt Security Registrar duly executed by, the Holder hereof or his attorney duly authorized in writing,
and thereupon one or more new Notes of like tenor, of authorized denominations and for the same aggregate principal amount, will be issued to the designated transferee or transferees.] 
 The Notes are issuable only in registered form without coupons in denominations of $2,000 and any integral multiple of $1,000 in excess thereof. As
provided in the Indenture and subject to certain limitations therein set forth, Notes are exchangeable for a like aggregate principal amount of Notes and of like tenor of a different authorized denomination, as requested by the Holder surrendering
the same. 
 No service charge shall be made for any such registration of transfer or exchange, but the Partnership may require payment of a
sum sufficient to cover any tax or other governmental charge payable in connection therewith. 
 Prior to due presentment of this Note for
registration of transfer, the Partnership, the Guarantor, the Trustee and any agent of the Partnership, the Guarantor or the Trustee may treat the Person in whose name this Note is registered as the owner hereof for all purposes, whether or not this
Note is overdue, and neither the Partnership, the Guarantor, the Trustee nor any such agent shall be affected by notice to the contrary. 
 Obligations of the Partnership and the Guarantor under the Indenture and the Debt Securities thereunder, including this Note, are non-recourse to ONEOK Partners GP, L.L.C. (the “General Partner”) and ONEOK ILP GP, L.L.C. (the
“Guarantor General Partner”) and their respective Affiliates (other than the Partnership and the Guarantor), and payable only out of cash flow and assets of the Partnership and the Guarantor. The Trustee, and each Holder of a Debt Security
by its acceptance thereof, will be deemed to have agreed in the Indenture that (1) none of the General Partner, the Guarantor General Partner and their respective assets (nor any of their respective Affiliates, other than the Partnership and
the Guarantor, or their respective assets) shall be liable for any of the obligations of the Partnership or the Guarantor under the Indenture or such Debt Securities, including this Note, and (2) no director, officer, employee, stockholder or
unitholder, as such, of the Partnership, the Guarantor, the Trustee, the General Partner, the Guarantor General Partner or any Affiliate of any of the foregoing entities shall have any personal liability in respect of the obligations of the
Partnership or the Guarantor under the Indenture or such Debt Securities by reason of his, her or its status. 
 This Note shall be governed
by and construed in accordance with the laws of the State of New York. 
 All terms used in this Note which are defined in the Indenture
shall have the meanings assigned to them in the Indenture. 
  

 A-6 

 [If a definitive Debt Security, insert as a separate page— 
 FOR VALUE RECEIVED, the undersigned hereby sell(s), assign(s) and transfer(s) unto
                                        
     (Please Print or Typewrite Name and Address of Assignee) the within instrument of ONEOK PARTNERS, L.P. and does hereby irrevocably constitute and appoint
                                        
     Attorney to transfer said instrument on the books of the within-named Partnership, with full power of substitution in the premises. 
 Please Insert Social Security or 
 Other Identifying Number of Assignee: 
  

							
	 	 	 	 		  	 
				
	Dated:	 	 	 		  	 
		 		 		  	(Signature)

  
  
  

			
	 Signature Guarantee:
	  	 
		  	 (Participant in a Recognized Signature
 Guaranty Medallion Program)

 NOTICE: The signature to this assignment must correspond with the name as written upon the face of
the within instrument in every particular, without alteration or enlargement or any change whatever.] 
  

 A-7 

 [If a Global Security, insert as a separate page— 
 SCHEDULE OF INCREASES OR DECREASES 
 IN GLOBAL SECURITY 
 The following increases or decreases in this Global Security have been made: 
  

									
	 

Date of Exchange
	 	 Amount of
 Decrease in
 Principal
 Amount of this
 Global Security
	 	 Amount of
 Increase in
 Principal Amount
 of this 
Global Security
	  	 Principal Amount
 of this Global
 Security following
 such decrease 
(or increase)
	  	 
Signature of
 authorized officer
 of Trustee or
 Depositary

  

 A-8 

 NOTATION OF GUARANTEE 
 The Guarantor (which term includes any successor person under the Indenture dated as of September 25, 2006 (as amended and supplemented from time to
time, the “Indenture”) between ONEOK Partners, L.P., a Delaware limited partnership (the “Partnership”), and Wells Fargo Bank, N.A., as trustee (the “Trustee”)), has fully,
unconditionally and absolutely guaranteed, to the extent set forth in the Indenture and subject to the provisions in the Indenture, the due and punctual payment of the principal of, premium, if any, and interest on the Notes and all other amounts
due and payable under the Indenture and the Notes by the Partnership. 
 The obligations of the Guarantor to the Holders of Notes and to the
Trustee pursuant to the Guarantee are expressly set forth in Article XII of the Indenture and reference is hereby made to the Indenture for the precise terms of the Guarantee. Capitalized terms used but not defined herein have the meanings given to
them in the Indenture. 
  

			
	 ONEOK PARTNERS INTERMEDIATE LIMITED
 PARTNERSHIP

		
	By:	 	 ONEOK ILP GP, L.L.C.,
 its General
Partner

			
		
	By:	 	 

			
	Name:	 	 

			
	Title:	 	 

  

 A-9

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