12-(4-chlorophenyl)-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;12-[4-[(4,4-difluoropiperidin-1-yl)methyl]phenyl]-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-(6-methoxy-3-pyridinyl)-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-pyridin-3-yl-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-[4-[[4-(trifluoromethyl)piperidin-1-yl]methyl]phenyl]-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile

C132H133ClF5N29O6 — CID 158009848

About 12-(4-chlorophenyl)-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;12-[4-[(4,4-difluoropiperidin-1-yl)methyl]phenyl]-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-(6-methoxy-3-pyridinyl)-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-pyridin-3-yl-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-[4-[[4-(trifluoromethyl)piperidin-1-yl]methyl]phenyl]-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile

12-(4-chlorophenyl)-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;12-[4-[(4,4-difluoropiperidin-1-yl)methyl]phenyl]-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-(6-methoxy-3-pyridinyl)-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-pyridin-3-yl-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-[4-[[4-(trifluoromethyl)piperidin-1-yl]methyl]phenyl]-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile (PubChem CID 158009848) has the molecular formula C132H133ClF5N29O6 and a molecular weight of 2352.16 g/mol. Its IUPAC name is 12-(4-chlorophenyl)-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;12-[4-[(4,4-difluoropiperidin-1-yl)methyl]phenyl]-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-(6-methoxy-3-pyridinyl)-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-pyridin-3-yl-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-[4-[[4-(trifluoromethyl)piperidin-1-yl]methyl]phenyl]-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile.

Molecular Properties

• Compound Name: 12-(4-chlorophenyl)-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;12-[4-[(4,4-difluoropiperidin-1-yl)methyl]phenyl]-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-(6-methoxy-3-pyridinyl)-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-pyridin-3-yl-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-[4-[[4-(trifluoromethyl)piperidin-1-yl]methyl]phenyl]-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile
• PubChem CID: 158009848
• Molecular Formula: C132H133ClF5N29O6
• Molecular Weight: 2352.16 g/mol
• Exact Mass: 2350.06
• IUPAC Name: 12-(4-chlorophenyl)-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;12-[4-[(4,4-difluoropiperidin-1-yl)methyl]phenyl]-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-(6-methoxy-3-pyridinyl)-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-pyridin-3-yl-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-[4-[[4-(trifluoromethyl)piperidin-1-yl]methyl]phenyl]-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile
• SMILES: CCN1CCC(Oc2c(C#N)ncc3[nH]c4ncc(-c5ccc(CN6CCC(C(F)(F)F)CC6)cc5)cc4c23)CC1.CCN1CCC(Oc2c(C#N)ncc3[nH]c4ncc(-c5ccc(CN6CCC(F)(F)CC6)cc5)cc4c23)CC1.CCN1CCC(Oc2c(C#N)ncc3[nH]c4ncc(-c5ccc(Cl)cc5)cc4c23)CC1.CCN1CCC(Oc2c(C#N)ncc3[nH]c4ncc(-c5ccc(OC)nc5)cc4c23)CC1.CCN1CCC(Oc2c(C#N)ncc3[nH]c4ncc(-c5cccnc5)cc4c23)CC1
• InChI: InChI=1S/C31H33F3N6O.C30H32F2N6O.C24H22ClN5O.C24H24N6O2.C23H22N6O/c1-2-39-13-9-24(10-14-39)41-29-26(16-35)36-18-27-28(29)25-15-22(17-37-30(25)38-27)21-5-3-20(4-6-21)19-40-11-7-23(8-12-40)31(32,33)34;1-2-37-11-7-23(8-12-37)39-28-25(16-33)34-18-26-27(28)24-15-22(17-35-29(24)36-26)21-5-3-20(4-6-21)19-38-13-9-30(31,32)10-14-38;1-2-30-9-7-18(8-10-30)31-23-20(12-26)27-14-21-22(23)19-11-16(13-28-24(19)29-21)15-3-5-17(25)6-4-15;1-3-30-8-6-17(7-9-30)32-23-19(11-25)26-14-20-22(23)18-10-16(13-28-24(18)29-20)15-4-5-21(31-2)27-12-15;1-2-29-8-5-17(6-9-29)30-22-19(11-24)26-14-20-21(22)18-10-16(13-27-23(18)28-20)15-4-3-7-25-12-15/h3-6,15,17-18,23-24H,2,7-14,19H2,1H3,(H,37,38);3-6,15,17-18,23H,2,7-14,19H2,1H3,(H,35,36);3-6,11,13-14,18H,2,7-10H2,1H3,(H,28,29);4-5,10,12-14,17H,3,6-9H2,1-2H3,(H,28,29);3-4,7,10,12-14,17H,2,5-6,8-9H2,1H3,(H,27,28)
• InChIKey: FETBFQXLISCGMT-UHFFFAOYSA-N
• XLogP: 25.02
• TPSA: 430.64 Ų
• H-Bond Donors: 5
• H-Bond Acceptors: 30
• Rotatable Bonds: 25
• Heavy Atoms: 173
• Complexity: —

Lipinski Rule of Five

3 violations

Rule	Value
MW ≤ 500	2352.16
LogP ≤ 5	25.02
H-Bond Donors ≤ 5	5
H-Bond Acceptors ≤ 10	30

Frequently Asked Questions

What is the IUPAC name of 12-(4-chlorophenyl)-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;12-[4-[(4,4-difluoropiperidin-1-yl)methyl]phenyl]-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-(6-methoxy-3-pyridinyl)-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-pyridin-3-yl-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-[4-[[4-(trifluoromethyl)piperidin-1-yl]methyl]phenyl]-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile?

The IUPAC name of 12-(4-chlorophenyl)-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;12-[4-[(4,4-difluoropiperidin-1-yl)methyl]phenyl]-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-(6-methoxy-3-pyridinyl)-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-pyridin-3-yl-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-[4-[[4-(trifluoromethyl)piperidin-1-yl]methyl]phenyl]-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile (CID 158009848) is 12-(4-chlorophenyl)-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;12-[4-[(4,4-difluoropiperidin-1-yl)methyl]phenyl]-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-(6-methoxy-3-pyridinyl)-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-pyridin-3-yl-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-[4-[[4-(trifluoromethyl)piperidin-1-yl]methyl]phenyl]-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile.

What is the SMILES notation for 12-(4-chlorophenyl)-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;12-[4-[(4,4-difluoropiperidin-1-yl)methyl]phenyl]-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-(6-methoxy-3-pyridinyl)-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-pyridin-3-yl-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-[4-[[4-(trifluoromethyl)piperidin-1-yl]methyl]phenyl]-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile?

The canonical SMILES for 12-(4-chlorophenyl)-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;12-[4-[(4,4-difluoropiperidin-1-yl)methyl]phenyl]-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-(6-methoxy-3-pyridinyl)-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-pyridin-3-yl-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-[4-[[4-(trifluoromethyl)piperidin-1-yl]methyl]phenyl]-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile is CCN1CCC(Oc2c(C#N)ncc3[nH]c4ncc(-c5ccc(CN6CCC(C(F)(F)F)CC6)cc5)cc4c23)CC1.CCN1CCC(Oc2c(C#N)ncc3[nH]c4ncc(-c5ccc(CN6CCC(F)(F)CC6)cc5)cc4c23)CC1.CCN1CCC(Oc2c(C#N)ncc3[nH]c4ncc(-c5ccc(Cl)cc5)cc4c23)CC1.CCN1CCC(Oc2c(C#N)ncc3[nH]c4ncc(-c5ccc(OC)nc5)cc4c23)CC1.CCN1CCC(Oc2c(C#N)ncc3[nH]c4ncc(-c5cccnc5)cc4c23)CC1.

What is the InChIKey of 12-(4-chlorophenyl)-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;12-[4-[(4,4-difluoropiperidin-1-yl)methyl]phenyl]-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-(6-methoxy-3-pyridinyl)-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-pyridin-3-yl-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-[4-[[4-(trifluoromethyl)piperidin-1-yl]methyl]phenyl]-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile?

The InChIKey is FETBFQXLISCGMT-UHFFFAOYSA-N. The full InChI is InChI=1S/C31H33F3N6O.C30H32F2N6O.C24H22ClN5O.C24H24N6O2.C23H22N6O/c1-2-39-13-9-24(10-14-39)41-29-26(16-35)36-18-27-28(29)25-15-22(17-37-30(25)38-27)21-5-3-20(4-6-21)19-40-11-7-23(8-12-40)31(32,33)34;1-2-37-11-7-23(8-12-37)39-28-25(16-33)34-18-26-27(28)24-15-22(17-35-29(24)36-26)21-5-3-20(4-6-21)19-38-13-9-30(31,32)10-14-38;1-2-30-9-7-18(8-10-30)31-23-20(12-26)27-14-21-22(23)19-11-16(13-28-24(19)29-21)15-3-5-17(25)6-4-15;1-3-30-8-6-17(7-9-30)32-23-19(11-25)26-14-20-22(23)18-10-16(13-28-24(18)29-20)15-4-5-21(31-2)27-12-15;1-2-29-8-5-17(6-9-29)30-22-19(11-24)26-14-20-21(22)18-10-16(13-27-23(18)28-20)15-4-3-7-25-12-15/h3-6,15,17-18,23-24H,2,7-14,19H2,1H3,(H,37,38);3-6,15,17-18,23H,2,7-14,19H2,1H3,(H,35,36);3-6,11,13-14,18H,2,7-10H2,1H3,(H,28,29);4-5,10,12-14,17H,3,6-9H2,1-2H3,(H,28,29);3-4,7,10,12-14,17H,2,5-6,8-9H2,1H3,(H,27,28).

What are the key properties of 12-(4-chlorophenyl)-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;12-[4-[(4,4-difluoropiperidin-1-yl)methyl]phenyl]-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-(6-methoxy-3-pyridinyl)-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-pyridin-3-yl-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-[4-[[4-(trifluoromethyl)piperidin-1-yl]methyl]phenyl]-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile?

12-(4-chlorophenyl)-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;12-[4-[(4,4-difluoropiperidin-1-yl)methyl]phenyl]-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-(6-methoxy-3-pyridinyl)-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-pyridin-3-yl-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-[4-[[4-(trifluoromethyl)piperidin-1-yl]methyl]phenyl]-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile has a molecular weight of 2352.16 g/mol, XLogP of 25.02, 25 rotatable bonds, 5 hydrogen bond donors, and 30 hydrogen bond acceptors.

Where does this data come from?

All data for 12-(4-chlorophenyl)-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;12-[4-[(4,4-difluoropiperidin-1-yl)methyl]phenyl]-3-(1-ethylpiperidin-4-yl)oxy-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-(6-methoxy-3-pyridinyl)-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-pyridin-3-yl-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile;3-(1-ethylpiperidin-4-yl)oxy-12-[4-[[4-(trifluoromethyl)piperidin-1-yl]methyl]phenyl]-5,8,10-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6,10,12-hexaene-4-carbonitrile is sourced from PubChem (CID 158009848), the world's largest open chemistry database maintained by the National Library of Medicine (NIH).