(1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-(1,1-dioxothiazinan-2-yl)ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-N-[1-cyclobutyl-3,4-dioxo-4-(prop-2-enylamino)butan-2-yl]-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(6-methyl-1,1-dioxo-1,2,6-thiadiazinan-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-3-[(2S)-2-cyclohexyl-2-[[(2S)-1-(1,1-dioxo-1,2-thiazolidin-2-yl)-3,3-dimethylbutan-2-yl]carbamoylamino]acetyl]-N-[1-(ethylamino)-1,2-dioxoheptan-3-yl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide

C105H177N19O21S3 — CID 159907969

About (1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-(1,1-dioxothiazinan-2-yl)ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-N-[1-cyclobutyl-3,4-dioxo-4-(prop-2-enylamino)butan-2-yl]-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(6-methyl-1,1-dioxo-1,2,6-thiadiazinan-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-3-[(2S)-2-cyclohexyl-2-[[(2S)-1-(1,1-dioxo-1,2-thiazolidin-2-yl)-3,3-dimethylbutan-2-yl]carbamoylamino]acetyl]-N-[1-(ethylamino)-1,2-dioxoheptan-3-yl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide

(1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-(1,1-dioxothiazinan-2-yl)ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-N-[1-cyclobutyl-3,4-dioxo-4-(prop-2-enylamino)butan-2-yl]-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(6-methyl-1,1-dioxo-1,2,6-thiadiazinan-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-3-[(2S)-2-cyclohexyl-2-[[(2S)-1-(1,1-dioxo-1,2-thiazolidin-2-yl)-3,3-dimethylbutan-2-yl]carbamoylamino]acetyl]-N-[1-(ethylamino)-1,2-dioxoheptan-3-yl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide (PubChem CID 159907969) has the molecular formula C105H177N19O21S3 and a molecular weight of 2137.88 g/mol. Its IUPAC name is (1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-(1,1-dioxothiazinan-2-yl)ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-N-[1-cyclobutyl-3,4-dioxo-4-(prop-2-enylamino)butan-2-yl]-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(6-methyl-1,1-dioxo-1,2,6-thiadiazinan-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-3-[(2S)-2-cyclohexyl-2-[[(2S)-1-(1,1-dioxo-1,2-thiazolidin-2-yl)-3,3-dimethylbutan-2-yl]carbamoylamino]acetyl]-N-[1-(ethylamino)-1,2-dioxoheptan-3-yl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide.

Molecular Properties

• Compound Name: (1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-(1,1-dioxothiazinan-2-yl)ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-N-[1-cyclobutyl-3,4-dioxo-4-(prop-2-enylamino)butan-2-yl]-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(6-methyl-1,1-dioxo-1,2,6-thiadiazinan-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-3-[(2S)-2-cyclohexyl-2-[[(2S)-1-(1,1-dioxo-1,2-thiazolidin-2-yl)-3,3-dimethylbutan-2-yl]carbamoylamino]acetyl]-N-[1-(ethylamino)-1,2-dioxoheptan-3-yl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide
• PubChem CID: 159907969
• Molecular Formula: C105H177N19O21S3
• Molecular Weight: 2137.88 g/mol
• Exact Mass: 2136.25
• IUPAC Name: (1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-(1,1-dioxothiazinan-2-yl)ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-N-[1-cyclobutyl-3,4-dioxo-4-(prop-2-enylamino)butan-2-yl]-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(6-methyl-1,1-dioxo-1,2,6-thiadiazinan-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-3-[(2S)-2-cyclohexyl-2-[[(2S)-1-(1,1-dioxo-1,2-thiazolidin-2-yl)-3,3-dimethylbutan-2-yl]carbamoylamino]acetyl]-N-[1-(ethylamino)-1,2-dioxoheptan-3-yl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide
• SMILES: C=CCNC(=O)C(=O)C(CC1CCC1)NC(=O)[C@@H]1[C@@H]2[C@H](CN1C(=O)[C@@H](NC(=O)N[C@H](CN1CCCN(C)S1(=O)=O)C(C)(C)C)C(C)(C)C)C2(C)C.CC(C)(C)[C@H](NC(=O)N[C@H](CN1CCCCS1(=O)=O)C1CCCCC1)C(=O)N1C[C@H]2[C@@H]([C@H]1C(=O)NC(CC1CC1)C(=O)C(N)=O)C2(C)C.CCCCC(NC(=O)[C@@H]1[C@@H]2[C@H](CN1C(=O)[C@@H](NC(=O)N[C@H](CN1CCCS1(=O)=O)C(C)(C)C)C1CCCCC1)C2(C)C)C(=O)C(=O)NCC
• InChI: InChI=1S/C36H61N7O7S.C35H60N6O7S.C34H56N6O7S/c1-11-16-37-31(46)28(44)24(19-22-14-12-15-22)38-30(45)27-26-23(36(26,8)9)20-43(27)32(47)29(35(5,6)7)40-33(48)39-25(34(2,3)4)21-42-18-13-17-41(10)51(42,49)50;1-8-10-17-24(29(42)31(44)36-9-2)37-30(43)28-26-23(35(26,6)7)20-41(28)32(45)27(22-15-12-11-13-16-22)39-33(46)38-25(34(3,4)5)21-40-18-14-19-49(40,47)48;1-33(2,3)28(38-32(45)37-24(21-11-7-6-8-12-21)19-39-15-9-10-16-48(39,46)47)31(44)40-18-22-25(34(22,4)5)26(40)30(43)36-23(17-20-13-14-20)27(41)29(35)42/h11,22-27,29H,1,12-21H2,2-10H3,(H,37,46)(H,38,45)(H2,39,40,48);22-28H,8-21H2,1-7H3,(H,36,44)(H,37,43)(H2,38,39,46);20-26,28H,6-19H2,1-5H3,(H2,35,42)(H,36,43)(H2,37,38,45)/t23-,24?,25+,26-,27-,29+;23-,24?,25+,26-,27-,28-;22-,23?,24+,25-,26-,28+/m000/s1
• InChIKey: NWUUKYKMKPCPMS-PFUWHCSESA-N
• XLogP: 6.47
• TPSA: 539.50 Ų
• H-Bond Donors: 12
• H-Bond Acceptors: 21
• Rotatable Bonds: 39
• Heavy Atoms: 148
• Complexity: —

Lipinski Rule of Five

4 violations

Rule	Value
MW ≤ 500	2137.88
LogP ≤ 5	6.47
H-Bond Donors ≤ 5	12
H-Bond Acceptors ≤ 10	21

Computed Properties (RDKit)

• Structural Alerts: {'alert_name': 'diketo_group', 'substructure': 'N/A'}, {'alert_name': 'isolated_alkene', 'substructure': 'N/A'}

Frequently Asked Questions

What is the IUPAC name of (1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-(1,1-dioxothiazinan-2-yl)ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-N-[1-cyclobutyl-3,4-dioxo-4-(prop-2-enylamino)butan-2-yl]-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(6-methyl-1,1-dioxo-1,2,6-thiadiazinan-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-3-[(2S)-2-cyclohexyl-2-[[(2S)-1-(1,1-dioxo-1,2-thiazolidin-2-yl)-3,3-dimethylbutan-2-yl]carbamoylamino]acetyl]-N-[1-(ethylamino)-1,2-dioxoheptan-3-yl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide?

The IUPAC name of (1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-(1,1-dioxothiazinan-2-yl)ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-N-[1-cyclobutyl-3,4-dioxo-4-(prop-2-enylamino)butan-2-yl]-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(6-methyl-1,1-dioxo-1,2,6-thiadiazinan-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-3-[(2S)-2-cyclohexyl-2-[[(2S)-1-(1,1-dioxo-1,2-thiazolidin-2-yl)-3,3-dimethylbutan-2-yl]carbamoylamino]acetyl]-N-[1-(ethylamino)-1,2-dioxoheptan-3-yl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide (CID 159907969) is (1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-(1,1-dioxothiazinan-2-yl)ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-N-[1-cyclobutyl-3,4-dioxo-4-(prop-2-enylamino)butan-2-yl]-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(6-methyl-1,1-dioxo-1,2,6-thiadiazinan-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-3-[(2S)-2-cyclohexyl-2-[[(2S)-1-(1,1-dioxo-1,2-thiazolidin-2-yl)-3,3-dimethylbutan-2-yl]carbamoylamino]acetyl]-N-[1-(ethylamino)-1,2-dioxoheptan-3-yl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide.

What is the SMILES notation for (1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-(1,1-dioxothiazinan-2-yl)ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-N-[1-cyclobutyl-3,4-dioxo-4-(prop-2-enylamino)butan-2-yl]-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(6-methyl-1,1-dioxo-1,2,6-thiadiazinan-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-3-[(2S)-2-cyclohexyl-2-[[(2S)-1-(1,1-dioxo-1,2-thiazolidin-2-yl)-3,3-dimethylbutan-2-yl]carbamoylamino]acetyl]-N-[1-(ethylamino)-1,2-dioxoheptan-3-yl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide?

The canonical SMILES for (1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-(1,1-dioxothiazinan-2-yl)ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-N-[1-cyclobutyl-3,4-dioxo-4-(prop-2-enylamino)butan-2-yl]-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(6-methyl-1,1-dioxo-1,2,6-thiadiazinan-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-3-[(2S)-2-cyclohexyl-2-[[(2S)-1-(1,1-dioxo-1,2-thiazolidin-2-yl)-3,3-dimethylbutan-2-yl]carbamoylamino]acetyl]-N-[1-(ethylamino)-1,2-dioxoheptan-3-yl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide is C=CCNC(=O)C(=O)C(CC1CCC1)NC(=O)[C@@H]1[C@@H]2[C@H](CN1C(=O)[C@@H](NC(=O)N[C@H](CN1CCCN(C)S1(=O)=O)C(C)(C)C)C(C)(C)C)C2(C)C.CC(C)(C)[C@H](NC(=O)N[C@H](CN1CCCCS1(=O)=O)C1CCCCC1)C(=O)N1C[C@H]2[C@@H]([C@H]1C(=O)NC(CC1CC1)C(=O)C(N)=O)C2(C)C.CCCCC(NC(=O)[C@@H]1[C@@H]2[C@H](CN1C(=O)[C@@H](NC(=O)N[C@H](CN1CCCS1(=O)=O)C(C)(C)C)C1CCCCC1)C2(C)C)C(=O)C(=O)NCC.

What is the InChIKey of (1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-(1,1-dioxothiazinan-2-yl)ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-N-[1-cyclobutyl-3,4-dioxo-4-(prop-2-enylamino)butan-2-yl]-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(6-methyl-1,1-dioxo-1,2,6-thiadiazinan-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-3-[(2S)-2-cyclohexyl-2-[[(2S)-1-(1,1-dioxo-1,2-thiazolidin-2-yl)-3,3-dimethylbutan-2-yl]carbamoylamino]acetyl]-N-[1-(ethylamino)-1,2-dioxoheptan-3-yl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide?

The InChIKey is NWUUKYKMKPCPMS-PFUWHCSESA-N. The full InChI is InChI=1S/C36H61N7O7S.C35H60N6O7S.C34H56N6O7S/c1-11-16-37-31(46)28(44)24(19-22-14-12-15-22)38-30(45)27-26-23(36(26,8)9)20-43(27)32(47)29(35(5,6)7)40-33(48)39-25(34(2,3)4)21-42-18-13-17-41(10)51(42,49)50;1-8-10-17-24(29(42)31(44)36-9-2)37-30(43)28-26-23(35(26,6)7)20-41(28)32(45)27(22-15-12-11-13-16-22)39-33(46)38-25(34(3,4)5)21-40-18-14-19-49(40,47)48;1-33(2,3)28(38-32(45)37-24(21-11-7-6-8-12-21)19-39-15-9-10-16-48(39,46)47)31(44)40-18-22-25(34(22,4)5)26(40)30(43)36-23(17-20-13-14-20)27(41)29(35)42/h11,22-27,29H,1,12-21H2,2-10H3,(H,37,46)(H,38,45)(H2,39,40,48);22-28H,8-21H2,1-7H3,(H,36,44)(H,37,43)(H2,38,39,46);20-26,28H,6-19H2,1-5H3,(H2,35,42)(H,36,43)(H2,37,38,45)/t23-,24?,25+,26-,27-,29+;23-,24?,25+,26-,27-,28-;22-,23?,24+,25-,26-,28+/m000/s1.

What are the key properties of (1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-(1,1-dioxothiazinan-2-yl)ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-N-[1-cyclobutyl-3,4-dioxo-4-(prop-2-enylamino)butan-2-yl]-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(6-methyl-1,1-dioxo-1,2,6-thiadiazinan-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-3-[(2S)-2-cyclohexyl-2-[[(2S)-1-(1,1-dioxo-1,2-thiazolidin-2-yl)-3,3-dimethylbutan-2-yl]carbamoylamino]acetyl]-N-[1-(ethylamino)-1,2-dioxoheptan-3-yl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide?

(1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-(1,1-dioxothiazinan-2-yl)ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-N-[1-cyclobutyl-3,4-dioxo-4-(prop-2-enylamino)butan-2-yl]-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(6-methyl-1,1-dioxo-1,2,6-thiadiazinan-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-3-[(2S)-2-cyclohexyl-2-[[(2S)-1-(1,1-dioxo-1,2-thiazolidin-2-yl)-3,3-dimethylbutan-2-yl]carbamoylamino]acetyl]-N-[1-(ethylamino)-1,2-dioxoheptan-3-yl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide has a molecular weight of 2137.88 g/mol, XLogP of 6.47, 39 rotatable bonds, 12 hydrogen bond donors, and 21 hydrogen bond acceptors.

Where does this data come from?

All data for (1R,2S,5S)-N-(4-amino-1-cyclopropyl-3,4-dioxobutan-2-yl)-3-[(2S)-2-[[(1S)-1-cyclohexyl-2-(1,1-dioxothiazinan-2-yl)ethyl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-N-[1-cyclobutyl-3,4-dioxo-4-(prop-2-enylamino)butan-2-yl]-3-[(2S)-2-[[(2S)-3,3-dimethyl-1-(6-methyl-1,1-dioxo-1,2,6-thiadiazinan-2-yl)butan-2-yl]carbamoylamino]-3,3-dimethylbutanoyl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide;(1R,2S,5S)-3-[(2S)-2-cyclohexyl-2-[[(2S)-1-(1,1-dioxo-1,2-thiazolidin-2-yl)-3,3-dimethylbutan-2-yl]carbamoylamino]acetyl]-N-[1-(ethylamino)-1,2-dioxoheptan-3-yl]-6,6-dimethyl-3-azabicyclo[3.1.0]hexane-2-carboxamide is sourced from PubChem (CID 159907969), the world's largest open chemistry database maintained by the National Library of Medicine (NIH).