Exhibit 10.1

Confidential
Materials omitted and filed separately with the
Securities and Exchange Commission. Asterisks denote omissions.

AMENDMENT TO RESEARCH AND LICENSE AGREEMENT

WHEREAS, Trustees of Boston University of Massachusetts, a non-profit corporation with offices at 715 Albany Street, 560, Boston, Massachusetts
(hereinafter referred to as "UNIVERSITY") and NitroMed, Inc., a Delaware corporation with its principle office at 12 Oak Park Drive, Bedford, Massachusetts 01730 (hereinafter referred to as
"NITROMED") for certain SPONSORED RESEARCH PROGRAMS to be sponsored by NITROMED and performed by UNIVERSITY as set forth in the Research and License Agreement between Trustees of Boston University and
NitroMed, Inc. effective June 1, 1993 (hereinafter referred to as "AGREEMENT").

WHEREAS,
NITROMED desires to sponsor and UNIVERSITY desires to perform an additional SPONSORED RESEARCH PROGRAM as described in the attached Exhibit A.

WHEREAS,
NITROMED and UNIVERSITY mutually desire to amend the AGREEMENT to reflect the additional SPONSORED RESEARCH PROGRAM to be sponsored by NITROMED and performed by UNIVERSITY.

WHEREAS,
for good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the UNIVERSITY and NITROMED hereby agree to amend the AGREEMENT as follows:



Except
as specifically provided herein, the AGREEMENT as originally executed subject to any prior amendments is hereby ratified and confirmed.

IN
WITNESS WHEREOF, the parties have caused this Amendment to be executed by their duly authorized representatives.

|By:    |  | /s/MICHAEL D. LOBERG |  | By:    |  | /s/JOSEPH BARABINO                 
|------ |  | -------------------- |  | ------ |  | -----------------------------------
|Name:  |  | Michael D. Loberg    |  | Name:  |  | Joseph Barabino                    
|Title: |  | CEO                  |  | Title: |  | Director of Research Administration
|Date:  |  | 12/2/02              |  | Date:  |  | 12/3/02                            

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S-Nitrosothiols in the Metabolism and Action of Exogenous Nitric Oxide Donors

Exhibit A

I
would like to propose the following experiments that address identifying the potential S-nitrosothiol intermediate(s) involved in nitrate metabolism. All experiments will
be performed using HepG2or G3 cells and rat liver (either following intravenous infusion or isolated perfusion of the liver with the nitrate compound of interest). In each case, cells will be exposed
to isosorbide mononitrate or a nitrated NSAID (SINOD).



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S-Nitrosothiols in the Metabolism and Action of Exogenous Nitric Oxide Donors

EXHIBIT
B

Budget

|Salary    |  | $ | [** | ]
|--------- |  | - | --- | -
|Fringe    |  | $ | [** | ]
|Supplies  |  | $ | [** | ]
|Total DC  |  | $ | [** | ]
|IDC @ 25% |  | $ | [** | ]
|TOTAL     |  | $ | [** | ]

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AMENDMENT 2 TO RESEARCH AND LICENSE AGREEMENT

WHEREAS, Trustees of Boston University of Massachusetts, a non-profit corporation with offices at 715 Albany Street, 560, Boston, Massachusetts
(hereinafter referred to as "UNIVERSITY") and NitroMed, Inc., a Delaware corporation with its principle office at 125 Spring Street, Lexington, Massachusetts 02421 (hereinafter referred to as
"NITROMED") for certain SPONSORED RESEARCH PROGRAMS to be sponsored by NITROMED and performed by UNIVERSITY as set forth in the Research and License Agreement between Trustees of Boston University and
NitroMed, Inc. effective June 1, 1993 (hereinafter referred to as "AGREEMENT").

WHEREAS,
NITROMED desires to sponsor and UNIVERSITY desires to perform an additional SPONSORED RESEARCH PROGRAM as described in the attached Exhibit A.

WHEREAS,
NITROMED and UNIVERSITY mutually desire to amend the AGREEMENT to reflect the additional SPONSORED RESEARCH PROGRAM to be sponsored by NITROMED and performed by UNIVERSITY.

WHEREAS,
for good and valuable consideration, the receipt and sufficiency of which is hereby acknowledged, the UNIVERSITY and NITROMED hereby agree to amend the AGREEMENT as follows:



Except
as specifically provided herein, the AGREEMENT as originally executed subject to any prior amendments is hereby ratified and confirmed.

IN
WITNESS WHEREOF, the parties have caused this Amendment to be executed by their duly authorized representatives.

|By:    |  | /s/L. GORDON LETTS  |  | By:    |  | /s/JOSEPH BARABINO                         
|------ |  | ------------------- |  | ------ |  | -------------------------------------------
|Name:  |  | L. Gordon Letts     |  | Name:  |  | Joseph Barabino                            
|Title: |  | CSO & Senior VP R&D |  | Title: |  | Director, Office of Research Administration
|Date:  |  | 1-31-2005           |  | Date:  |  | 2/19/05                                    

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Exhibit A

Assessment of the Antioxidant Potential of NO Donors and Hydralazine

The major goal of this research project is to provide insight into the molecular mode of action of BiDil, a combination comprising isosorbide dinitrate (ISDN) and
hydralazine. Results from these investigations are expected to provide a better rationale for the observed clinical effectiveness of this drug in the setting of heart failure and thus aid in
NitroMed's scientific development/marketing efforts during and after the launch. A key aspect addressed in previous studies with hydralazine has been its ability to prevent the development of nitrate
tolerance and to act as an antioxidant. The latter forms the basis for the current working hypothesis that BiDil is particularly effective in African Americans because of a higher propensity/degree of
oxidative stress in this compared to other ethnic groups.

Based
on the assumption that some if not all of the beneficial actions of hydralazine and ISDN on cardiac performance are due to an effect that is only observable under in vivo
conditions, the majority of the studies will be performed in tissues sampled from experimental rodent models. These investigations will be complemented by a limited set of in vitro studies. Healthy
male Wistar rats will serve as an initail screen to investigate the effects of ISDN and hydralazine, alone and in combination, on NO-related metabolites (S-nitrosothiol,
N-nitrosamine and heme-nitrosyl species, as well as nitrite and nitrate; BiDil's NObonome) and a broad array of key antioxidant enzymes (e.g. SOD, catalase, GPx, GR, TrX),
reactive oxygen species (e.g. hydrogen peroxide, superoxide) as well as biologically relevant oxidation products (e.g. isoprostanes, MDA, LPO, nitrotyrosine) and other biomarkers of oxidative stress
such as cellular GSH/GSSG and Asc/DHA ratios. In addition, NO availability will be assessed by quantification of cGMP concentrations. Wherever possible, assays will be established in/adapted to the
96-well plate design to allow for high throughput, and transferred to NitroMed after study completion. All of the above measurements will be carried out in blood (plasma, RBCs) and select
tissues (heart, aorta, vena cava, liver, kidney). The combined assessment of the drugs' NObonome and the profile of direct and indirect antioxidative effects should provide a powerful tool to evaluate
the contributions of individual components to the overall biochemical/pharmacological effect of BiDil. In a second step the effects of ISDN, hydralazine and their combination on the above parameters
will be investigated in select animal models of disease. Since heart failure as a consequence of hypertension appears to develop more frequently in African Americans than in other populations
[**]

The
overall hypothesis of this project is that [**]. If this assumption is correct, the results of these studies [**]

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Exhibit B

Budget

|Title of Research Project: |  | Assessment of the Antioxidant Potential of NO Donors and Hydralazine                                                    |  |   |     |  
|-------------------------- |  | ----------------------------------------------------------------------------------------------------------------------- |  | - | --- | -
|Study Period:              |  | Jan 2, 2005  Dec 30, 2005                                                                                              |  |   |     |  
|Principal Investigator:    |  | Martin Feelisch, PhD
Professor of Medicine, Professor of Biochemistry
Phone: 617-414-8150; e-mail: feelisch@bu.edu      |  |   |     |  
|Location:                  |  | Evans Biomedical Research Institute, X 128/129
Boston University School of Medicine
650 Albany Street, Boston, MA 02118 |  |   |     |  
|Budget Categories:         |  | Equipment                                                                                                               |  | $ | [** | ]
|                           |  | [**]                                                                                                                    |  |   |     |  
|                           |  | Animals and husbandry                                                                                                   |  | $ | [** | ]
|                           |  | Controls: [**]                                                                                                          |  |   |     |  
|                           |  | Disease models: [**]                                                                                                    |  |   |     |  
|                           |  | Personnel                                                                                                               |  | $ | [** | ]
|                           |  | [**]                                                                                                                    |  |   |     |  
|                           |  | Chemicals and consumables                                                                                               |  | $ | [** | ]
|                           |  | [**]                                                                                                                    |  |   |     |  
|                           |  |                                                                                                                         |  |   |    
|Total Project Costs:       |  |                                                                                                                         |  | $ | [** | ]

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