Document:

Letter agreement between the Registrant and Robert A. Conerly

 Exhibit 10.17 

 

			
	[Graphic] 	  	Rib-X Pharmaceuticals, Inc.
		  	25 Science Park
		  	New Haven, CT 06511
		  	Phone 203-624-5621
		  	FAX 203-624-5627
		  	Froshauer@rib-x.com

 May 1, 2002 
 Mr. Bob Conerly 
 843 N. Hoover Avenue 

Louisville, CO 80027 
 Dear Bob, 

Thank you for your interest in undertaking a leadership role at Rib-X Pharmaceuticals, Inc. (the “Company”). We believe your
experience and talent would be an asset to our dynamic team. Therefore, contingent upon the prompt completion of our due diligence process, we are pleased to offer you the position of Chief Financial Officer (“CFO”). 

In addition to undertaking a significant fiduciary responsibility, in which you will build an appropriate Finance Department to manage
the research and development budget and all matters of finance, you will be asked to work closely with the Chief Executive Officer in a strategic capacity to evolve and fortify our business plan to assure an increase in the valuation of the Company.
Our talented scientific staff represents one of the strongest, tangible assets at Rib-X. In your capacity of CFO, you will also be asked to participate with the Senior Management team in helping to guide the scientific and personal success of this
rich team, assuring their maximal contribution to the Company. Our interactive culture is critical to our success, your entrepreneurial, active participation in the community of Rib-X will also constitute an element of your role. 

Your compensation will consist of an initial base salary of fifteen thousand four hundred and sixteen dollars and sixty seven cents
($15,416.67) per month. At this time, under appropriate circumstances, we can also provide you with severance for a period of 6 months after the termination of your employment. The actual terms of this severance compensation will be agreed upon our
further discussion. Finally, subject to approval by the Board of Directors, approximately 250,000 individual stock options, representing a 1% ownership interest, will be offered if you accept this position. 

Based upon your yearly performance, you will also be eligible for an annual bonus of up to 25% of your salary. Stock options may also be
granted as an additional component of your annual bonus. If you choose to accept the position and decide to relocate your family and household we will reimburse actual moving expenses, including storage costs of personal belongings until you are
able to get into a rented home no later than July 28, 2002. The relocation reimbursement is valid for a period not to exceed one year after your start date. In recognition of your need for temporary housing, Rib-X will also reimburse you for
the actual cost of approximately one month’s rent in furnished accommodations in the New Haven area. You will be paid in accordance with the Company’s normal payroll practices as established or modified from time to time. Currently,
salaries are paid on a semi-monthly basis. 

 You will be eligible to participate in benefits programs to the same extent as, and subject
to the same terms, conditions and limitations applicable to, other employees of the Company of similar rank and tenure. These benefits currently include company-subsidized major medical and dental insurance plans, vacation and personal leave, a
future 401(k) program, and Flex Plan (pre-tax medical and dependent care expense reimbursement). 
 The Company requires you to
verify that the performance of your position at Rib-X does not and will not breach any agreement entered into by you prior to employment with the Company (i.e., you have not entered into any agreements with previous employers that are in conflict
with your obligations to Rib-X). Please provide us with a copy of any such agreements. You will also be required to sign a Nondisclosure and Confidentiality Agreement as a condition of your employment with the Company. A copy of this agreement will
be made available to you. Moreover, please provide us, for purposes of completing the I-9 form, sufficient documentation to demonstrate your eligibility to work in the United States. 

The above terms are not contractual. They are a summary of our initial employment relationship and are subject to later modification by
the Company. Your employment with Rib-X will be “at-will,” meaning that either you or the Company may terminate your employment relationship at any time, for any reason, with or without prior notice. The Company has found that an
“at-will” relationship is in the best interests of both the Company and its employees. 
 Rib-X places great value on
its people, and we demonstrate that by providing career growth opportunities in addition to the financial compensation package outlined above. In your case, we believe this position offers you the opportunity to build upon your expertise in
microbial genetics and apply your expertise to our drug discovery program. Here, you will interact with a wide range of scientists, technical associates and executive officers of the company. 

Please review the conditions of this job offer so that we may discuss them further. I look forward to the potential of working with you.

 Sincerely, 
 Susan Froshauer, Ph.D.

 President and CEOLetter agreement between the Registrant and Erin M. Duffy, PH. D.

 Exhibit 10.18 

 

			
	[Graphic]	  	 Rib-X Pharmaceuticals, Inc.
 25 Science Park
 New Haven, CT 06511
 Phone 203-624-5606
 FAX 203-624-5627

December 2, 2001 

Dr. Erin Duffy 
 349 River Road 

Deep River, CT 06417 
 Dear Dr. Duffy,

 Thank you for your interest in career opportunities at Rib-X Pharmaceuticals, Inc. (the “Company”). Since we
believe your talent would be an asset to our young and dynamic team, we are pleased to offer you the position of Director of Structure Based Design. In this capacity, you will develop and lead the computational chemistry and crystallography groups.
You would also establish and lead the information technology and data integration functions. I anticipate your experience and insights into the drug discovery process and your understanding of the power of the structure-based approach would
stimulate the fundamental culture of the Rib-X organization. Therefore, to assure you play a substantial role in the formation of the Rib-X culture, you would also be asked to participate in the Rib-X Senior Management Team. 

Your compensation will consist of an initial base salary of $ 10,000.00 (ten-thousand dollars) per month. Based upon your yearly
performance, you will also be eligible for an annual bonus of up to 10% of your salary. Additional stock options may also be granted as a component of your annual bonus. You will be paid in accordance with the Company’s normal payroll practices
as established or modified from time to time. Currently, salaries are paid on a semi-monthly basis. 
 You will be eligible to
participate in benefits programs to the same extent as, and subject to the same terms, conditions and limitations applicable to, other employees of the Company of similar rank and tenure. These benefits currently include company-subsidized major
medical and dental insurance plans, vacation and personal leave, a 401-K program, and an Employee Stock Option Plan (ESOP). The details of the ESOP, including number of options granted to you as a new employee and a vesting schedule, are subject to
the approval of the Company’s Board of Directors and Executive Management, which will occur shortly after closing of our Series A round of financing. 
 The Company requires you to verify that the performance of your position at Rib-X does not and will not breach any agreement entered into by you prior to employment with the Company (i.e., you have not
entered into any agreements with previous employers that are in conflict with your obligations to Rib-X). Please provide us with a copy of any such agreements. You will also be required to sign a Nondisclosure and Confidentiality Agreement as a
condition of your employment with the Company. A copy of this agreement will be made available to you. Moreover, please provide us, for purposes of completing the I-9 form, sufficient documentation to demonstrate your eligibility to work in the
United States. 

 The above terms are not contractual. They are a summary of our initial employment
relationship and are subject to later modification by the Company. Your employment with Rib-X will be “at-will,” meaning that either you or the Company may terminate your employment relationship at any time, for any reason, with or without
prior notice. The Company has found that an “at-will” relationship is in the best interests of both the Company and its employees. 
 Rib-X places great value on its people, and we demonstrate that by providing career growth opportunities in addition to the financial compensation package outlined above. In your case, we believe this
position offers you the opportunity to build upon your scientific expertise and extend your expertise in synthetic organic chemistry (Or to the appropriate area) to a drug development process. You will be involved in one or more specific drug
discovery projects, and you will interact with a wide range of scientists, technical associates, and executive officers of the company. 
 Please review the conditions of this job offer carefully. Feel free to call us with any questions you may have. We look forward to learning of your decision concerning this offer by date (usually within 2
weeks). 
 Sincerely, 
 /s/ Susan
Froshauer, Ph.D. 
 Susan Froshauer, Ph.D. 
 CEO, Rib-X Pharmaceuticals 

  
 2Letter agreement between the Registrant and Jarrod Longcor

 Exhibit 10.19 

 

			
	[Graphic] 	  	 Rib-X Pharmaceuticals, Inc.
 300 George Street
 New Haven, CT 06511
 Phone 203-624-5606
 FAX 203-624-5627

  

			
	 Mr. Jarrod Longcor
 1229
Crummell Avenue
 Annapolis, MD 21403
	  	September 17, 2007

 Dear Mr. Longcor, 
 Thank you for your interest in career opportunities at Rib-X Pharmaceuticals, Inc. (the “Company”). Since we believe your experience in business development will be an asset to our dynamic,
multidisciplinary team, we are pleased to offer you a position at Rib-X as Business Development Director, within the Business Development Department. In this capacity we are certain you will make strong contributions researching, analyzing and
assessing business opportunities for Rib-X. 
 Your compensation will consist of an initial base salary of twelve thousand
eighty three dollars and thirty four cents ($12,083.34) per month. Based upon your yearly performance and the overall performance of the Company, you may also be eligible for an annual bonus. If you choose to accept this position and decide to
relocate your family, we will pay for packing and shipping of 12,000 lbs of household goods to Connecticut. The relocation reimbursement is valid for a period not to exceed one year from your start date. It is understood that if you terminate your
employment you will be required to reimburse the company for relocation expenses as follows: termination within one year 100%, within two years 60%, and within three years 33%. In addition, Rib-X will reimburse travel expenses associated with
locating Connecticut housing up to a maximum amount of $800.00. 
 If you choose to accept this position, we will recommend
forty thousand (40,000) individual stock options be granted to you by the Rib-X Board of Directors in their sole discretion. Additional stock options may also be offered from time to time depending upon certain events, including for example the
successful completion of annual Corporate Goals. The possibility of additional stock options may also be offered. You will be paid in accordance with the Company’s normal payroll practices as established or modified from time to time.
Currently, salaries are paid on a semi-monthly basis. 
 You will be eligible to participate in benefits programs to the same
extent as, and subject to the same terms, conditions and limitations applicable to other employees of the Company of similar rank and tenure. These benefits currently include company-subsidized major medical and dental insurance plans, vacation and
personal leave, a Flex Plan (pre-tax medical and dependant care expense reimbursement), short and long term disability, a $50,000 life insurance policy and a pre-tax 401K plan to encourage employees’ retirement planning. 

 The Company requires you to verify that the performance of your position at Rib-X does not
and will not breach any agreement entered into by you prior to employment with the Company (i.e., you have not entered into any agreements with previous employers that are in conflict with your obligations to Rib-X). Please provide us with a copy of
any such agreements. You will also be required to sign a Nondisclosure and Confidentiality Agreement as a condition of your employment with the Company. A copy of this agreement will be made available to you. Moreover, please provide us, for
purposes of completing the I-9 form, sufficient documentation to demonstrate your eligibility to work in the United States. 

The above terms are not contractual. They are a summary of our initial employment relationship and are subject to later modification by
the Company. Your employment with Rib-X will be “at-will,” meaning that either you or the Company may terminate your employment relationship at any time, for any reason, with or without prior notice. The Company has found that an
“at-will” relationship is in the best interests of both the Company and its employees. 
 Rib-X places great value on
its people, and we demonstrate that by providing career growth opportunities in addition to the financial compensation package outlined above. In your case, we believe this position offers you the opportunity to build upon your expertise in
microbiology and extend your expertise to a drug development environment. Here, you will interact with a wide range of scientists, technical associates, and executive officers of the company. 

Please review the conditions of this job offer carefully. Feel free to call us with any questions about Rib-X or this offer. We look
forward to receiving an answer from you on or before September 24, 2007. 
 Sincerely, 

 

	
	
	/s/    Albert R. Collinson
	 Albert R. Collinson, Ph.D.

Chief Business Officer

  

	
	
	/s/    Jarrod Longcor
	Accepted and Agreed

  

	
	
	9/21/2007
	Date

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