Document:

Guarantee Agreement dated as of March 31, 2006

 Exhibit 10.3 
 GUARANTEE AGREEMENT (this “Agreement”) dated as of 31 March 2006, between each of the corporations listed on
Schedule I hereto (each such corporation, individually, a “Guarantor” and, collectively, the “Guarantors”) and THE BANK OF NOVA SCOTIA, as administrative agent (the “Agent”) for the Lenders (as
defined in the Credit Agreement referred to below). 
 Reference is made to the Amended and Restated Credit Agreement dated as of
31 March 2006 (as amended, supplemented or otherwise modified from time to time, the “Credit Agreement”), between CONVERGYS CMG CANADA LIMITED PARTNERSHIP (the “New Borrower”) and CCM LIMITED PARTNER INC.
(the “Existing Borrower”), as borrowers, the Guarantors, as guarantors, the lenders from time to time party thereto (the “Lenders”) and THE BANK OF NOVA SCOTIA (“BNS”), as Agent, which amended and
restated the Credit Agreement dated as of 18 November 2005 between CONVERGYS CUSTOMER MANAGEMENT CANADA INC. (a predecessor of the Existing Borrower), as borrower, the Guarantors, as guarantors, the Lenders and BNS, as Agent. Capitalized terms
used herein and not defined herein shall have the meanings assigned to such terms in the Credit Agreement. 
 In consideration of the
obligation of the Lenders to make Advances to the Existing Borrower, and in order to induce the Lenders to make such Advances, the Guarantors and the Agent entered into the Guarantee Agreement dated 18 November 2005 to, inter alia,
guarantee the Obligations (as defined therein) of the Existing Borrower. Upon the terms and subject to the conditions specified in the Credit Agreement, the Lenders have also agreed to make Advances to the New Borrower. Each of the Guarantors
acknowledges that it will derive substantial benefit from the making of the Advances to the New Borrower by the Lenders. The obligations of the Lenders to make Advances to the New Borrower are conditioned on, among other things, the execution and
delivery by the Guarantors of a Guarantee Agreement in the form hereof. As consideration therefor and in order to induce the Lenders to make Advances to the New Borrower, the Guarantors are willing to execute this Agreement. 
 Accordingly, the parties hereto agree as follows: 
 SECTION 1. Guarantee. Each Guarantor unconditionally guarantees (the “Guarantee”), jointly with the other Guarantors and severally, as a primary obligor and not merely as a surety, (a) the due and punctual
payment by the New Borrower of (i) the principal of and premium, if any, and interest (including interest accruing during the pendency of any bankruptcy, insolvency, receivership or other similar proceeding, regardless of whether such interest
is allowed or allowable as a claim in such proceeding) on the Advances, when and as due, whether at maturity, by acceleration, upon one or more dates set for prepayment or otherwise and (ii) all other monetary obligations, including fees,
costs, expenses and indemnities, whether primary, secondary, direct, contingent, fixed or otherwise (including monetary obligations incurred during the pendency of any bankruptcy, insolvency, receivership or other similar proceeding, regardless of
whether such monetary obligations are allowed or allowable as a claim in such proceeding), of the New Borrower to the Lenders under the Credit Agreement and the other Loan Documents, (b) the due and punctual performance of all covenants,
agreements, obligations and liabilities of the New Borrower under or pursuant to the Credit 

 Agreement and the other Loan Documents, (c) the due and punctual payment and performance of all the covenants,
agreements, obligations and liabilities of each other Guarantor under or pursuant to this Agreement and the other Loan Documents and (d) the due and punctual payment and performance of all obligations of the New Borrower under each Hedging
Agreement entered into with any counterparty that was a Lender (or an Affiliate thereof) at the time such Hedging Agreement was entered into (all the monetary and other obligations described in the preceding clauses (a) through (d) being
collectively called the “Obligations”). Each Guarantor further agrees that the Obligations may be extended or renewed, in whole or in part, without notice to or further assent from it, and that it will remain bound upon the
Guarantee notwithstanding any extension or renewal of any Obligation. 
 SECTION 2. Obligations Not Waived. To the fullest extent
permitted by applicable law, each Guarantor waives presentment to, demand of payment from and protest to the New Borrower of any of the Obligations, and also waives notice of acceptance of the Guarantee and notice of protest for nonpayment. To the
fullest extent permitted by applicable law, the obligations of each Guarantor hereunder shall not be affected by (a) the failure of the Agent or any other Lender to assert any claim or demand or to enforce or exercise any right or remedy
against the New Borrower or any Guarantor under the provisions of the Credit Agreement, any other Loan Document or otherwise or (b) any rescission, waiver, amendment or modification of, or any release from any of the terms or provisions of,
this Agreement, any other Loan Document, any Guarantee or any other agreement, including with respect to any other Guarantor under this Agreement. 
 SECTION 3. Guarantee of Payment. Each Guarantor further agrees that the Guarantee constitutes a guarantee of payment when due and not of collection, and waives any right to require that any resort be had by the Agent or any
other Lender to any of the security held for payment of the Obligations or to any balance of any deposit account or credit on the books of the Agent or any other Lender in favor of the New Borrower or any other person. 
 SECTION 4. No Discharge or Diminishment of Guarantee. The obligations of each Guarantor hereunder shall not be subject to any reduction,
limitation, impairment or termination for any reason (other than the indefeasible payment in full in cash of the Obligations), including any claim of waiver, release, surrender, alteration or compromise of any of the Obligations, and shall not be
subject to any defense or set-off, counterclaim, recoupment or termination whatsoever by reason of the invalidity, illegality or unenforceability of the Obligations or otherwise. Without limiting the generality of the foregoing, the obligations of
each Guarantor hereunder shall not be discharged or impaired or otherwise affected by the failure of the Agent or any other Lender to assert any claim or demand or to enforce any remedy under the Credit Agreement, any other Loan Document or any
other agreement, by any waiver or modification of any provision of any thereof, by any default, failure or delay, wilful or otherwise, in the performance of the Obligations, or by any other act or omission that may or might in any manner or to any
extent vary the risk of any Guarantor or that would otherwise operate as a discharge of each Guarantor as a matter of law or equity (other than the indefeasible payment in full in cash of all the Obligations) or which would impair or eliminate any
right of such Guarantor to subrogation. 
  

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 SECTION 5. Defenses of New Borrower Waived. To the fullest extent permitted by applicable
law, each of the Guarantors waives any defense based on or arising out of any defense of the New Borrower or the unenforceability of the Obligations or any part thereof from any cause, or the cessation from any cause of the liability of the New
Borrower, other than the indefeasible payment in full in cash of all the Obligations. The Agent and the Lenders may, at their election, compromise or adjust any part of the Obligations, make any other accommodation with the New Borrower or any other
Guarantor or exercise any other right or remedy available to them against the New Borrower or any other Guarantor, without affecting or impairing in any way the liability of any Guarantor hereunder except to the extent that all the Obligations have
been indefeasibly paid in full in cash. Pursuant to applicable law, each of the Guarantors waives any defense arising out of any such election even though such election operates, pursuant to applicable law, to impair or to extinguish any right of
reimbursement or subrogation or other right or remedy of such Guarantor against the New Borrower or any other Guarantor. 
 SECTION 6.
Agreement to Pay; Subordination. In furtherance of the foregoing and not in limitation of any other right that the Agent or any other Lender has at law or in equity against any Guarantor by virtue hereof, upon the failure of the New Borrower
or any other Guarantor to pay any Obligation when and as the same shall become due, whether at maturity, by acceleration, after notice of prepayment or otherwise, each Guarantor hereby promises to and will forthwith pay, or cause to be paid, to the
Agent or such other Lender as designated thereby in cash the amount of such unpaid Obligations. Upon payment by any Guarantor of any sums to the Agent or any Lender as provided above, all rights of such Guarantor against the New Borrower arising as
a result thereof by way of right of subrogation, contribution, reimbursement, indemnity or otherwise shall in all respects be subordinate and junior in right of payment to the prior indefeasible payment in full in cash of all the Obligations. In
addition, any indebtedness of the New Borrower now or hereafter held by any Guarantor is hereby subordinated in right of payment to the prior payment in full in cash of the Obligations. If any amount shall erroneously be paid to any Guarantor on
account of (a) such subrogation, contribution, reimbursement, indemnity or similar right or (b) any such indebtedness of the New Borrower, such amount shall be held in trust for the benefit of the Lenders and shall forthwith be paid to the
Agent to be credited against the payment of the Obligations, whether matured or unmatured, in accordance with the terms of the Loan Documents. 
 SECTION 7. Information. Each of the Guarantors assumes all responsibility for being and keeping itself informed of the New Borrower’s financial condition and assets, and of all other circumstances bearing upon the risk of
nonpayment of the Obligations and the nature, scope and extent of the risks that such Guarantor assumes and incurs hereunder, and agrees that none of the Agent or the Lenders will have any duty to advise any of the Guarantors of information known to
it or any of them regarding such circumstances or risks. 
 SECTION 8. Representations and Warranties. Each of the Guarantors
represents and warrants as to itself that all representations and warranties relating to it contained in the Credit Agreement are true and correct. 
 SECTION 9. Termination. The Guarantees (a) shall terminate when all the Obligations have been indefeasibly paid in full in cash and the Lenders have no further commitment to lend under the Credit Agreement and
(b) shall continue to be effective or be 
  

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 reinstated, as the case may be, if at any time payment, or any part thereof, of any Obligation is rescinded or must
otherwise be restored by any Lender or any Guarantor upon the bankruptcy or reorganization of the New Borrower, any Guarantor or otherwise. 
 SECTION 10. Binding Effect; Several Agreement; Assignments. Whenever in this Agreement any of the parties hereto is referred to, such reference shall be deemed to include the successors and assigns of such party, and all
covenants, promises and agreements by or on behalf of the Guarantors that are contained in this Agreement shall bind and inure to the benefit of each party hereto and their respective successors and assigns. This Agreement shall become effective as
to any Guarantor when a counterpart hereof executed on behalf of such Guarantor shall have been delivered to the Agent, and a counterpart hereof shall have been executed on behalf of the Agent, and thereafter shall be binding upon such Guarantor and
the Agent and their respective successors and assigns, and shall inure to the benefit of such Guarantor, the Agent and the other Lenders, and their respective successors and assigns, except that no Guarantor shall have the right to assign its rights
or obligations hereunder or any interest herein (and any such attempted assignment shall be void). This Agreement shall be construed as a separate agreement with respect to each Guarantor and may be amended, modified, supplemented, waived or
released with respect to any Guarantor without the approval of any other Guarantor and without affecting the obligations of any other Guarantor hereunder. 
 SECTION 11. Waivers; Amendment. (a) No failure or delay of the Agent in exercising any power or right hereunder shall operate as a waiver thereof, nor shall any single or partial exercise of any such
right or power, or any abandonment or discontinuance of steps to enforce such a right or power, preclude any other or further exercise thereof or the exercise of any other right or power. The rights and remedies of the Agent hereunder and of the
other Lenders under the other Loan Documents are cumulative and are not exclusive of any rights or remedies that they would otherwise have. No waiver of any provision of this Agreement or consent to any departure by any Guarantor therefrom shall in
any event be effective unless the same shall be permitted by paragraph (b) below, and then such waiver or consent shall be effective only in the specific instance and for the purpose for which given. No notice or demand on any Guarantor in any
case shall entitle such Guarantor to any other or further notice or demand in similar or other circumstances. 
 (b) Neither this Agreement
nor any provision hereof may be waived, amended or modified except pursuant to a written agreement entered into between the Guarantors with respect to which such waiver, amendment or modification relates and the Agent, with the prior written consent
of the Required Lenders (except as otherwise provided in the Credit Agreement). 
 SECTION 12. Governing Law. THIS
AGREEMENT SHALL BE GOVERNED BY, AND CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK. 
 SECTION 13.
Notices. All communications and notices hereunder shall be in writing and given as provided in the Credit Agreement. All communications and notices hereunder to each Guarantor shall be given to it in care of the New Borrower. 
  

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 SECTION 14. Survival of Agreement; Severability. (a) All covenants, agreements,
representations and warranties made by the Guarantors herein and in the certificates or other instruments prepared or delivered in connection with or pursuant to this Agreement or any other Loan Document shall be considered to have been relied upon
by the Agent and the other Lenders and shall survive the making by the Lenders of the Advances regardless of any investigation made by the Lenders or on their behalf, and shall continue in full force and effect as long as the principal of or any
accrued interest on any Loan or any other fee or amount payable under this Agreement or any other Loan Document is outstanding and unpaid and as long as the Commitment shave not been terminated. 
 (b) In the event any one or more of the provisions contained in this Agreement or in any other Loan Document should be held invalid, illegal or
unenforceable in any respect, the validity, legality and enforceability of the remaining provisions contained herein and therein shall not in any way be affected or impaired thereby (it being understood that the invalidity of a particular provision
in a particular jurisdiction shall not in and of itself affect the validity of such provision in any other jurisdiction). The parties shall endeavor in good-faith negotiations to replace the invalid, illegal or unenforceable provisions with valid
provisions the economic effect of which comes as close as possible to that of the invalid, illegal or unenforceable provisions. 
 SECTION 15. Counterparts. This Agreement may be executed in counterparts, each of which shall constitute an original, but all of which when taken together shall constitute a single contract, and shall become effective as
provided in Section 10. Delivery of an executed signature page to this Agreement by facsimile transmission shall be as effective as delivery of a manually executed counterpart of this Agreement. 
 SECTION 16. Rules of Interpretation. The rules of interpretation specified in the Credit Agreement shall be applicable to this Agreement.

 SECTION 17. Jurisdiction; Consent to Service of Process. (a) Each Guarantor hereby irrevocably and unconditionally
submits, for itself and its property, to the nonexclusive jurisdiction of the Supreme Court of the State of New York sitting in New York County and of the United States District Court of the Southern District of New York, and any appellate court
from any thereof, in any action or proceeding arising out of or relating to this Agreement or any other Loan Document, or for recognition or enforcement of any judgment, and each of the parties hereto hereby irrevocably and unconditionally agrees
that all claims in respect of any such action or proceeding may be heard and determined in such New York State or, to the extent permitted by law, in such Federal court. Each of the parties hereto agrees that a final judgment in any such action or
proceeding shall be conclusive and may be enforced in other jurisdictions by suit on the judgment or in any other manner provided by law. Nothing in this Agreement or any other Loan Document shall affect any right that the Agent or any other Lender
may otherwise have to bring any action or proceeding relating to this Agreement or any other Loan Document against any Guarantor or its properties in the courts of any jurisdiction. 
 (b) Each Guarantor irrevocably and unconditionally waives, to the fullest extent it may legally and effectively do so, any objection that it may now or
hereafter have to the laying of venue of any suit, action or proceeding arising out of or relating to this Agreement or 
  

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 any other Loan Document in any court referred to in paragraph (a) of this Section. Each of the parties hereto hereby
irrevocably waives, to the fullest extent permitted by law, the defense of an inconvenient forum to the maintenance of such action or proceeding in any such court. 
 (c) Each party to this Agreement irrevocably consents to service of process in the manner provided for notices in Section 13. Nothing in this Agreement or any other Loan Document will affect the right of any
party to this Agreement to serve process in any other manner permitted by law. 
 SECTION 18. Waiver of Jury Trial. EACH PARTY
HERETO HEREBY WAIVES, TO THE FULLEST EXTENT PERMITTED BY APPLICABLE LAW, ANY RIGHT IT MAY HAVE TO A TRIAL BY JURY IN ANY LEGAL PROCEEDING DIRECTLY OR INDIRECTLY ARISING OUT OF OR RELATING TO THIS AGREEMENT, ANY OTHER LOAN DOCUMENT OR THE
TRANSACTIONS CONTEMPLATED HEREBY (WHETHER BASED ON CONTRACT, TORT OR ANY OTHER THEORY). EACH PARTY HERETO (A) CERTIFIES THAT NO REPRESENTATIVE, AGENT OR ATTORNEY OF ANY OTHER PARTY HAS REPRESENTED, EXPRESSLY OR OTHERWISE, THAT SUCH OTHER PARTY
WOULD NOT, IN THE EVENT OF LITIGATION, SEEK TO ENFORCE THE FOREGOING WAIVER AND (B) ACKNOWLEDGES THAT IT AND THE OTHER PARTIES HERETO HAVE BEEN INDUCED TO ENTER INTO THIS AGREEMENT BY, AMONG OTHER THINGS, THE MUTUAL WAIVERS AND CERTIFICATIONS
IN THIS SECTION 18. 
 SECTION 19. Right of Set-off. If an Event of Default shall have occurred and be continuing, each
Lender and each of its Affiliates is hereby authorized at any time and from time to time, to the fullest extent permitted by law, to set off and apply any and all deposits (general or special, time or demand, provisional or final) at any time held
and other Indebtedness at any time owing by such Lender or Affiliate to or for the credit or the account of any Guarantor against any or all the obligations of such Guarantor now or hereafter existing under this Agreement and the other Loan
Documents held by such Lender, irrespective of whether or not such Lender shall have made any demand under this Agreement or any other Loan Document and although such obligations may be unmatured. The rights of each Lender under this Section 19
are in addition to other rights and remedies (including other rights of set-off) that such Lender may have. 
  

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 IN WITNESS WHEREOF, the parties hereto have duly executed this Agreement as of the day and year first
above written. 
  

			
	CONVERGYS CORPORATION
		
	By:	 	  

		 	Earl C. Shanks
		 	Chief Financial Officer

 [signature page for Guarantee Agreement relating to Convergys CMG Canada Limited Partnership et al.]

  

 S1 

 IN WITNESS WHEREOF, the parties hereto have duly executed this Agreement as of the day and year first
above written. 
  

			
	 CONVERGYS INFORMATION
 MANAGEMENT
GROUP INC.

		
	By:	 	  

		 	Timothy M. Wesolowski
		 	Vice President and Treasurer

 [signature page for Guarantee Agreement relating to Convergys CMG Canada Limited Partnership et al.]

  

 S2 

 IN WITNESS WHEREOF, the parties hereto have duly executed this Agreement as of the day and year first
above written. 
  

			
	 CONVERGYS CUSTOMER
 MANAGEMENT
GROUP INC.

		
	By:	 	  

		 	Timothy M. Wesolowski
		 	Vice President and Treasurer

 [signature page for Guarantee Agreement relating to Convergys CMG Canada Limited Partnership et al.]

  

 S3 

 IN WITNESS WHEREOF, the parties hereto have duly executed this Agreement as of the day and year first
above written. 
  

			
	THE BANK OF NOVA SCOTIA, as Agent
		
	 By:
	 	  

		 	R. A. King
		 	Director
		
	By:	 	  

		 	B. Walker
		 	Associate

 [signature page for Guarantee Agreement relating to Convergys CMG Canada Limited Partnership et al.]

  

 S4 

 Schedule I to the 
 Guarantee Agreement 
  

							
	 Guarantor
	 	  	 	 Address

	Convergys Corporation	 		 	 201 E. Fourth Street,
 Cincinnati, Ohio
45201

				
		 		 		 	Attn: Timothy M. Wesolowski
		 		 		 	Telecopy: (513) 723-8978
			
	 Convergys Information
 Management Group
Inc.
	 		 	 201 E. Fourth Street,
 Cincinnati, Ohio
45201

				
		 		 		 	Attn: Timothy M. Wesolowski
		 		 		 	Telecopy: (513) 723-8978
			
	 Convergys Customer
 Management Group Inc.
	 		 	 201 E. Fourth Street
 Cincinnati, Ohio
45201

				
		 		 		 	Attn: Timothy M. Wesolowski
		 		 		 	Telecopy: (513) 723-8978Executive Employment Agreement, dated as of October 3, 2005

 Exhibit 4.31 
 

 
 EMPLOYMENT AGREEMENT 
 THIS EMPLOYMENT AGREEMENT (the “Agreement”) dated as of this 3rd day of OCTOBER 2005 (the “Effective Date”), by
and between ADHEREX, INC. (the “Company”), a wholly owned subsidiary of Adherex Technologies Inc. (“AHX”), and JEFFREY SOLASH, PH.D., an individual residing at the address set forth on the signature page hereof
(“Employee”). 
 1. Duties. While employed by the Company, Employee will be employed in the position of Chief
Licensing Officer of the Company and of AHX, and, as such, Employee agrees to faithfully perform the duties of the position of Chief Licensing Officer and to perform such other duties of an executive, managerial or administrative nature as shall
be reasonably specified and designated from time to time by the Chief Executive Officer (“CEO”) of the Company. Employee agrees to perform his duties and responsibilities at the Company diligently and to the best of his ability, and
further agrees to devote all of his business time and efforts to the performance of duties hereunder. Employee further agrees not to be employed by any entity or other third party while employed by the Company without first obtaining the advance
written consent of the Company. Notwithstanding the foregoing and subject to the Employee’s obligations herein and any applicable Company policies, the Employee shall be permitted to make personal investments, perform reasonable volunteer
services and with the prior written consent of the Company, serve as an advisor to or become a member of the Scientific Advisory Board of other companies, provided those companies are not engaged in the Company’s Business, as defined in the IP
Agreement (as defined below), or such service would not otherwise create a conflict of interest. 
 2. Compensation. In
consideration of his services to the Company, Employee will be compensated as follows: 
 (a) Base Salary. Employee
will be paid an annual base salary of One Hundred Twenty-Five Thousand Dollars (USD $125,000), less any withholdings required by law or properly requested by Employee (the “Base Salary”). The Company will pay Employee the Base Salary on
its regularly scheduled paydays, in accordance with its regular payroll practices and procedures. You will be eligible for annual salary increases at the discretion of the CEO. 
 (b) Signing Bonus. After Employee has executed this Agreement and any other required agreement(s), Employee will be paid a one-time
lump sum signing bonus of Ten Thousand Dollars (USD $10,000) (the “Signing Bonus”). The Signing Bonus is subject to any withholdings required by law and/or properly requested by Employee. If for any reason you do not complete 90 days of
employment at AHX, you will be responsible to repay to AHX the Signing Bonus. 
 (c) Discretionary Bonus. In addition
to the Base Salary and Signing Bonus, the Company in its sole discretion may award Employee an annual bonus of no more than Thirty Thousand Dollars (USD $30,000) annually (the “Annual Bonus”). The Company will have the sole discretion and
authority to determine Employee’s eligibility for and the amount of the Annual Bonus and the award of such Annual Bonus will be dependent upon performance objectives established by the CEO. The Annual Bonus is subject to any withholdings
required by law and/or properly requested by Employee. 

 (d) Stock Option Grant. Upon the presentation of a strategic plan for monetizing
the AHX intellectual property portfolio satisfactory to the CEO no later than 90 days from the Effective Date, subject to the approval of its Board of Directors (the “Board”), AHX will grant Employee an option to purchase up to
Seventy-Five Thousand (75,000) shares of AHX’s common stock (the “Option”). The Option will be subject to the terms and conditions of the AHX Stock Option Plan (the “Plan”) and a separate stock option agreement between
AHX and Employee. Shares subject to the Option will have an exercise price equal to the fair market value on the date of grant, as determined by the Board. The shares, subject to the option, shall vest annually in equal one-third installments over
the next three years on the anniversary of your hire date for so long as Employee remains employed by the Company. You will be eligible for additional awards of stock options at the discretion of the Board and the CEO based upon satisfactory
performance and successful completion of specified annual performance objectives. It is anticipated that you would be eligible for a further option to purchase up to 50,000 shares of AHX’s common stock in the second year of your employment, at
the discretion of the Board and the CEO, based upon satisfactory performance and successful completion of specified annual performance objectives. 
 (e) Business Expenses. The Company will reimburse Employee for all reasonable expenses incurred by Employee that are directly related to the business of the Company, provided that Employee complies with the
Company’s policies and procedures for reimbursement or the advance of business expenses. 
 3. Benefits. While employed by
the Company, Employee will receive such other benefits as are provided from time to time to other similarly-situated employees of the Company. All such benefits are subject the terms and conditions of the plan documents by which such benefits are
provided, and are subject to change by the Company at any time, with or without advance notice as long as such change applies equally to all similarly-situated employees. 
 4. Vacation and Paid Holidays. You will be eligible for vacation in accordance with the Company’s vacation policy. You will be entitled to take twenty (20) days of paid vacation annually. In
addition, Employee will be entitled to be paid for all holidays recognized in accordance with Company policy. 
 5. Confidential
Information and Restrictive Covenants. As a condition of Employee’s employment with the Company, Employee is required to sign the Confidentiality, Intellectual Property and Non-Competition Agreement attached as Exhibit A hereto
(the “IP Agreement”), which includes Employee’s agreement to refrain from disclosing the Company’s confidential information and to refrain from engaging in certain competitive activities after any termination of employment with
the Company. The IP Agreement is fully incorporated into this Agreement by reference, and a breach of the IP Agreement will be construed as a breach of this Agreement. 
 6. Conflicts of Interest. You are subject to the Company’s conflict of interest requirements and policies, and are responsible for recognizing and avoiding any and all circumstances that may give
rise to an actual conflict of interest or give the appearance of a conflict of interest situation. 
  

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 7. Termination of Employment. Employee’s employment with the Company is at-will,
meaning that either Employee or the Company can terminate the employment relationship at any time, for any or no reason, subject to the following provisions: 
 (a) Termination for Cause. Employee’s employment with the Company may be terminated for “Cause” at any time and without advance notice. If terminated for Cause, Employee will only be
entitled to receive payment of any wages and vacation pay earned or accrued to the date of termination. For purposes of this Agreement, “Cause” means Employee’s: (1) material breach of the terms of this Agreement or the IP
Agreement; (2) failure to diligently and properly perform his duties and responsibilities, or to comply with any policies and directives of the Company or the Board; (3) dishonest or illegal action (including, without limitation,
embezzlement) or any other action whether or not dishonest or illegal by Employee that is materially detrimental to the interest and well-being of the Company, including, without limitation, harm to its reputation; (4) failure to fully disclose
any material conflict of interest he may have with the Company in a transaction involving the Company which conflict is materially detrimental to the interest of the Company; or (5) your conviction of (i) any felony or (ii) any
misdemeanor or other crime of moral turpitude (other than a minor traffic offense). 
 (b) Termination upon Death or Disability.
Employee’s employment with the Company will terminate immediately in the event of his death or permanent disability. For purposes of this Agreement, permanent disability means that Employee is unable to perform the essential functions of his
position, with or without a reasonable accommodation, for more than sixty (60) consecutive days or ninety (90) days in any 12-month period. If terminated pursuant to this Section 7(b), Employee or his successor(s) will only be
entitled to receive payment of any wages and vacation pay earned or accrued to the date of termination. 
 (c) Resignation by Employee.
Employee may resign employment with the Company upon thirty (30) days’ advance written notice. If Employee fails to provide at least thirty (30) days advance notice of resignation, Employee will forfeit payment for any accrued, unused
vacation pay. The Company reserves the right in its sole discretion to pay Employee’s then-current Base Salary for all or a part of such notice period, in lieu of Employee’s continued employment during the notice period. If Employee
resigns his employment with the Company, Employee will be entitled to receive payment of any wages earned through the termination date and accrued vacation if Employee gives thirty (30) days notice as set forth above. 
 (d) Termination by the Company Without Cause. Employee’s employment with the Company may be terminated at any time without Cause. The termination of
Employee’s employment by the Company will be deemed to be “Without Cause” if Employee is terminated for any reason other than Sections 7(a) through (c) of this Agreement. 
  

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 8. Payments upon Termination. 
 (a) Accrued Compensation. If Employee’s employment with the Company is terminated by either party for any reason, Employee will receive
payment of any wages and vacation pay earned or accrued to the date of termination; provided, however, that if Employee resigns his employment with the Company, he must provide the notice specified in Section 7(c) hereof in order to
receive payment for any accrued, unused vacation time. 
 (b) Severance Benefits. In addition to any accrued compensation, if
Employee’s employment is terminated by the Company Without Cause, the Company will provide Employee with the following severance benefits, subject to the conditions described below. 
 (1) If Employee is terminated by the Company Without Cause, the Company will continue paying Employee’s then-current Base Salary and
health insurance benefits for the lesser of (i) for a period of three (3) months after the termination of Employee’s employment; or (ii) until the employee has accepted alternative employment (the “Benefits Period”). If
the Company cannot allow Employee to continue his participation in its health insurance benefit plans during the Benefits Period, the Company agrees to reimburse Employee for his COBRA premiums during the Benefits Period (at a level of coverage
equivalent to that in effect immediately prior to the termination). 
 (2) In order to receive any portion of the severance
benefits described in this Section 8(b), Employee will be required to first execute a release of all claims against the Company, in form reasonably acceptable to the Company. In addition, to continue receiving the severance benefits, Employee
must also comply with any post-termination obligations to the Company as a result of the IP Agreement. 
 9. Notices. Any
notice or other communication required or permitted hereunder must be made in writing and shall be delivered personally, sent by facsimile transmission or sent by certified, registered or express mail, postage prepaid. Any such notice shall be
deemed given when so delivered personally, sent by facsimile transmission or, if mailed, five days after the date of deposit in the United States mail as follows: 
 If to the Company, to: 
 Adherex, Inc. 
 4620 Creekstone Drive, Suite 200 
 Durham,
North Carolina 27703 
 Attention: General Counsel 
 If to the Employee, at the address set forth on the signature page hereof. 
  

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 Any party may by notice given in accordance with this Section 9 to the other parties hereto designate another
address or person for receipt by such person of notices hereunder. 
 10. Entire Agreement. This Agreement (including any
exhibits attached hereto) contains the entire agreement between the parties with respect to the subject matter hereof and supersedes all prior agreements, written or oral, with respect thereto, including without limitation any agreements that may
have been entered into between the Company and Employee. 
 11. Waivers and Amendments. This Agreement may only be amended,
superseded, canceled, renewed or extended, and the terms hereof may be waived, with a writing signed by all parties hereto, or, in the case of a waiver, by the party waiving compliance. No delay on the part of any party in exercising any right,
power or privilege hereunder shall operate as a waiver thereof, nor shall any waiver on the part of any party of any such right, power or privilege nor any single or partial exercise of any such right, power or privilege, preclude any other or
further exercise thereof or the exercise of any other such right, power or privilege. 
 12. Governing Law; Venue. This
Agreement will be governed by and construed in accordance with the laws of the state of North Carolina, without regard to conflicts of law principles. The parties further agree that the state or federal courts sitting in Durham County, North
Carolina shall have the sole and exclusive jurisdiction to hear any dispute(s) arising out of this Agreement (including any exhibits attached hereto). 
 13. Assignment. This Agreement, and Employee’s rights and obligations hereunder, may not be assigned by Employee; any purported assignment by Employee in violation hereof shall be null and void. In
the event of any sale, transfer or other disposition of all or substantially all of the Company’s assets or business, whether by merger, consolidation or otherwise, Employee agrees that the Company may assign this Agreement and its rights and
obligations hereunder to a successor in interest. 
 14. Binding Effect. This Agreement shall be binding upon and inure to the
benefit of the parties and their respective successors, permitted assigns, heirs, executors and legal representatives. 
 15.
Counterparts. This Agreement may be executed by the parties hereto in separate counterparts, each of which when so executed and delivered shall be an original but all such counterparts together shall constitute one and the same
instrument. Each counterpart may consist of two copies hereof each signed by one of the parties hereto. 
 [Signature page follows]

  

 5 

 IN WITNESS WHEREOF, the parties hereto have executed this Employment Agreement as of the day and year
first above written. 
  

					
		 	ADHEREX, INC.
			
		 	By:	 	 /s/ William P. Peters
  

		 	Name:	 	Dr. William P. Peters, MD PhD MBA
		 	Title:	 	Chief Executive Officer

					
		
		 	EMPLOYEE:
		
	 /s/ Rochelle Cupelli
  
	 	 /s/ Jeffrey Solash
  

	Witness	 	Employee:	 	Jeffrey Solash, Ph.D.
		 		 	797 River Bend Drive
		 		 	Rochester Hills, MI 48307

  

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 Adherex, Inc. 
 EXHIBIT A 
 CONFIDENTIALITY, INTELLECTUAL 
 PROPERTY AND NONCOMPETITION AGREEMENT 
 THIS CONFIDENTIALITY, INTELLECTUAL
PROPERTY AND NONCOMPETITION AGREEMENT (the “Agreement”) dated this 3rd day of October 2005 is made between Adherex, Inc. (the “Company”) and JEFFREY SOLASH, PH.D. (“Employee”).

 The parties hereto agree that it may be necessary for the Company to disclose to Employee from time to time certain confidential and
proprietary information concerning the products and processes and technology developed by the Company and/or its affiliates or subsidiaries which the Company wishes to protect along with its trade secrets, technical expertise, business knowledge,
procedures and systems and all other confidential and proprietary information, together with proprietary and other information of a confidential nature provided by third parties, all of which is not generally available to the public, the
unauthorized disclosure of which would cause irreparable harm to the Company, its parent Adherex Technologies Inc., its affiliates or subsidiaries. 
 In consideration of my employment by the Company, the undersigned and the Company agree as follows: 
 1. Definition of
“Information”. For the purposes of this Agreement, “Information” shall include, without limitation, all or any part of the corporate, strategic or marketing plans, financial information, product information, customer
information, and other information relating to the business of the Company, its affiliates or subsidiaries, all research and development activities, all unpublished know-how, technical data, techniques, records, formulae, process, designs, sketches,
photographs, plans, drawings, specifications, samples, reports, studies, findings, inventions and ideas, whether patentable or not, whether they be trade secrets or not and whether they be in written, graphic or oral form, that are now or hereafter
owned or acquired by Company, all of which are of a confidential and/or proprietary nature concerning the development, testing, production and marketing of, and consulting in the area of products and processes and technology developed by Company,
its affiliates or subsidiaries. Any Information which is communicated to any person external to the Company and/or its affiliates or subsidiaries shall be stamped with the words “PROTECTED” or “CONFIDENTIAL” or other such
identifying mark prior to its disclosure to such person. 
 2. Nondisclosure. Employee agrees to hold in trust and confidence all
Information and to use and communicate any Information only in the performance of his work for the Company to such authorized employees, subcontractors and others as are required by their duties to have knowledge thereof or for such other purposes
and to such persons as are authorized by the Company in writing. 
 3. Assignment of Intellectual Property Rights. All improvements,
inventions, know-how and discoveries, all Information and technology, and all patents or patent applications arising out of or relating to the Information whether developed by the Employee or not during the term of the Employee’s employment are
the exclusive property of Company, its affiliates or 

 subsidiaries. The Company, its affiliates or subsidiaries alone shall have the right to apply for, prosecute and obtain
patents, copyrights, trademarks or industrial design protection in any or all countries of the world in respect of any and all such improvements, inventions, know-how and discoveries and the Employee agrees to disclose, deliver and assign to the
Company, its affiliates or subsidiaries, as the case may be, all such improvements, inventions, know-how and discoveries whether patentable or not and agrees at any time to execute when requested any applications, transfers, assignments and other
documents as necessary for the purpose of confirming the Company’s, its affiliates’ or subsidiairies’ title, as the case may be, to any such improvements, inventions, know-how and discoveries, or for applying for prosecution and
obtaining patents in any country with respect thereto. Employee agrees to cooperate and assist fully in the prosecution of any such application. Any copyrightable materials generated or developed by Employee while employed by the Company, including
but not limited to, computer programs and related documentation, belong to the Company and Employee hereby assigns to the Company all interest and ownership in such copyright as and when created. 
 4. Restrictive Covenants. 
 (a)
Noncompetition; Nonsolicitation. While employed by the Company and for six months after the termination of his employment with the Company by either party, for any reason whatsoever, Employee will not, without the prior written consent of the
Company: 
 (1) provide senior management services to, manage, control, or participate in the management or control of any direct competitor
of the Company that is located in the Restricted Territory (as defined below) and is engaged in the Company’s Business (as defined below); 
 (2) solicit or attempt to solicit for the purpose of selling products comparable to or in competition with those products being developed or sold by the Company to any customers or clients of the Company with whom Employee had business
contacts on behalf of the Company during his employment with the Company; 
 (3) interfere or attempt to interfere with any contracts or
agreements that the Company has with any collaborators, customers, vendors or suppliers; and/or 
 (4) solicit any employees of the Company
(i) to resign their employment with the Company; (ii) to violate any duties owed to the Company; or (iii) breach any agreements with the Company. 
 Employee agrees not to engage in any of the foregoing activities set out in this Section 4(a) directly or indirectly, acting alone or as a director, employee, agent, consultant, member of a partnership, firm,
company or other entity or as a holder of or investor in more than 2% of any security of any class of any company or other business entity. 
 (b) Restricted Territory. For purposes of this Agreement, the “Restricted Territory” shall mean the greater metropolitan areas of: 
  

	 	(i)	Boston, MA; 

  

 2 

	 	(ii)	New York, NY; 

  

	 	(iii)	Philadelphia, PA; 

  

	 	(iv)	Princeton, NJ; 

  

	 	(v)	Indianapolis, IN; 

  

	 	(vi)	Groton, CT; 

  

	 	(vii)	Chicago, IL; 

  

	 	(viii)	Seattle, WA; and 

  

	 	(ix)	any locality within a thirty-five mile radius of Raleigh/Durham, North Carolina and/or Bethesda, MD. 

 (c) Company’s “Business.” The parties hereto agree that the Company’s “Business” is researching, developing,
marketing and selling pharmaceutical products and therapies related to the cadherin platform. 
 (d) Enforceability. The parties
hereto agree that in the event that the length of time, the geographic area or prohibited activities set forth in this Section 4 shall be deemed too restrictive in any court proceeding, that the court shall reduce such restrictions to those
which it deems reasonable and enforceable under the circumstances. 
 5. Return of Company Property. Upon demand by the Company or no
later than the termination of his employment, Employee agrees to immediately return to the Company any Information or other Company property in his possession. Such Information and any other Company property will be returned to the Company in the
same condition as when provided to Employee, reasonable wear and tear excepted. Employee further agrees to allow the Company to inspect any documents or work produced relating to the Information that are in the possession or control of the Employee.
The Employee agrees that unless authorized by the Company or as necessary in performing his job duties and responsibilities, he will not copy the Information. 
 6. Injunctive Relief. In the event that Employee breaches the provisions of Section 1 through 5 of this Agreement, the parties hereto agree that such breach could not be adequately remedied by monetary
damages. Therefore, the parties agree that in addition to any other remedies available for such breach, the Company will be entitled to injunctive relief for Employee’s breach or threatened breach of Sections 1 through 5 of this Agreement in
order to prevent or restrict any further breach or threatened breach. A failure by the Company to enforce any provision of this Agreement does not constitute a waiver of any of its rights and does not release the Employee of any responsibility for
performance under this Agreement. 
 7. Limitations. The Company agrees that all the obligations of confidentiality and non-disclosure
terminate when the Employee can establish with documentary proof that the relevant part of the Information: 
  

	 	(a)	was in the public domain at the time of the disclosure to the Employee by the Company, its affiliates or subsidiaries, 

  

	 	(b)	entered the public domain through no fault of the Employee, 

  

	 	(c)	was in the Employee’s possession free of any obligation of confidentiality before disclosure by the Company, its affiliates or subsidiaries to the Employee, or

  

 3 

	 	(d)	was disclosed to Employee in good faith by a third party which has the right to make such disclosure, 

 provided that the Employee notifies the Company in writing within 10 days of receipt of the Information where the exemptions under (c) and (d) apply. 
 8. Survival. The obligations of Employee pursuant to Sections 1 through 5 of this Agreement will continue in full force and effect notwithstanding
termination of the employment of the Employee. 
 9. No Other Agreements. Employee hereby advises the Company that unless described in
writing on Schedule “A” attached hereto, he is not bound by any other confidentiality, non-disclosure, noncompetition, or non-solicitation agreements. Employee further agrees not to become a party to any such agreement with others during
his employment with the Company unless otherwise agreed to by the Company. The Employee further advises the Company that there are no patents, patent applications or other inventions made by the Employee prior to his employment with the Company
unless any are specifically listed on Schedule “B” hereto. If no Schedules are attached to this Agreement, then there are no such agreements or patents outstanding. 
 10. Governing Law; Venue. The parties hereto agree that this Agreement is to be interpreted and governed by the laws of the state of North
Carolina. The parties further agree that the state or federal courts sitting in Durham County, North Carolina shall have the sole and exclusive jurisdiction to hear any dispute(s) arising out of this Agreement. 
 11. Severability. The various sections of this Agreement are severable and the invalidity of one does not affect the enforceability of the other
provisions of this Agreement. 
 12. Miscellaneous. For ease of interpretation, this Agreement is to be read with all changes in
gender and number as the circumstances require and the Agreement is binding upon and available to the benefit of both parties, their personal representatives, successors, affiliates, subsidiaries and assigns. Employee expressly agrees that the
Company may assign its rights and obligations hereunder to any successor in interest. Any notice under this Agreement should be delivered to the Company’s head office and the Employee at his home address. 
 [Signature page follows] 
  

 4 

 IN WITNESS WHEREOF the parties have executed this Confidentiality and Intellectual Property on the day
and year first written above. 
  

					
		 	ADHEREX, INC.
			
		 	By:	 	 /s/ William P. Peters
  

		 	Name:	 	Dr. William P. Peters, MD PhD MBA
		 	Title:	 	Chief Executive Officer

					
		
	 /s/ Rochelle Cupelli
  
	 	 /s/ Jeffrey Solash
  

	Witness	 	Employee:	 	Jeffrey Solash, Ph.D.
		 		 	797 River Bend Drive
		 		 	Rochester Hills, MI 48307

  

 5

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