5-[5-cyano-6-(cyclohexylamino)-3-pyridinyl]-N-(2-hydroxy-2-methylpropyl)-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;5-[6-(1-cyclobutylethylamino)-4-methyl-3-pyridinyl]-4-[(2S)-4,4-difluoro-2-methylpyrrolidine-1-carbonyl]-N-(2-hydroxy-2-methylpropyl)-1,3-thiazole-2-carboxamide;N-[(1S,2S)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-[(1R,2R)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-(2-hydroxy-2-methylpropyl)-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide

C119H160F2N26O15S5 — CID 159067535

About 5-[5-cyano-6-(cyclohexylamino)-3-pyridinyl]-N-(2-hydroxy-2-methylpropyl)-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;5-[6-(1-cyclobutylethylamino)-4-methyl-3-pyridinyl]-4-[(2S)-4,4-difluoro-2-methylpyrrolidine-1-carbonyl]-N-(2-hydroxy-2-methylpropyl)-1,3-thiazole-2-carboxamide;N-[(1S,2S)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-[(1R,2R)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-(2-hydroxy-2-methylpropyl)-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide

5-[5-cyano-6-(cyclohexylamino)-3-pyridinyl]-N-(2-hydroxy-2-methylpropyl)-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;5-[6-(1-cyclobutylethylamino)-4-methyl-3-pyridinyl]-4-[(2S)-4,4-difluoro-2-methylpyrrolidine-1-carbonyl]-N-(2-hydroxy-2-methylpropyl)-1,3-thiazole-2-carboxamide;N-[(1S,2S)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-[(1R,2R)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-(2-hydroxy-2-methylpropyl)-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide (PubChem CID 159067535) has the molecular formula C119H160F2N26O15S5 and a molecular weight of 2393.09 g/mol. Its IUPAC name is 5-[5-cyano-6-(cyclohexylamino)-3-pyridinyl]-N-(2-hydroxy-2-methylpropyl)-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;5-[6-(1-cyclobutylethylamino)-4-methyl-3-pyridinyl]-4-[(2S)-4,4-difluoro-2-methylpyrrolidine-1-carbonyl]-N-(2-hydroxy-2-methylpropyl)-1,3-thiazole-2-carboxamide;N-[(1S,2S)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-[(1R,2R)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-(2-hydroxy-2-methylpropyl)-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide.

Molecular Properties

• Compound Name: 5-[5-cyano-6-(cyclohexylamino)-3-pyridinyl]-N-(2-hydroxy-2-methylpropyl)-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;5-[6-(1-cyclobutylethylamino)-4-methyl-3-pyridinyl]-4-[(2S)-4,4-difluoro-2-methylpyrrolidine-1-carbonyl]-N-(2-hydroxy-2-methylpropyl)-1,3-thiazole-2-carboxamide;N-[(1S,2S)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-[(1R,2R)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-(2-hydroxy-2-methylpropyl)-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide
• PubChem CID: 159067535
• Molecular Formula: C119H160F2N26O15S5
• Molecular Weight: 2393.09 g/mol
• Exact Mass: 2391.11
• IUPAC Name: 5-[5-cyano-6-(cyclohexylamino)-3-pyridinyl]-N-(2-hydroxy-2-methylpropyl)-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;5-[6-(1-cyclobutylethylamino)-4-methyl-3-pyridinyl]-4-[(2S)-4,4-difluoro-2-methylpyrrolidine-1-carbonyl]-N-(2-hydroxy-2-methylpropyl)-1,3-thiazole-2-carboxamide;N-[(1S,2S)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-[(1R,2R)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-(2-hydroxy-2-methylpropyl)-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide
• SMILES: C[C@H]1CCCN1C(=O)c1nc(C(=O)NCC(C)(C)O)sc1-c1cnc(NC2CCCCC2)c(C#N)c1.Cc1cc(NC(C)C)ncc1-c1sc(C(=O)NCC(C)(C)O)nc1C(=O)N1CCC[C@@H]1C.Cc1cc(NC(C)C)ncc1-c1sc(C(=O)N[C@@H]2C[C@H]2O)nc1C(=O)N1CCC[C@@H]1C.Cc1cc(NC(C)C)ncc1-c1sc(C(=O)N[C@H]2C[C@@H]2O)nc1C(=O)N1CCC[C@@H]1C.Cc1cc(NC(C)C2CCC2)ncc1-c1sc(C(=O)NCC(C)(C)O)nc1C(=O)N1CC(F)(F)C[C@@H]1C
• InChI: InChI=1S/C26H35F2N5O3S.C26H34N6O3S.C23H33N5O3S.2C22H29N5O3S/c1-14-9-19(31-16(3)17-7-6-8-17)29-11-18(14)21-20(24(35)33-13-26(27,28)10-15(33)2)32-23(37-21)22(34)30-12-25(4,5)36;1-16-8-7-11-32(16)25(34)20-21(36-24(31-20)23(33)29-15-26(2,3)35)18-12-17(13-27)22(28-14-18)30-19-9-5-4-6-10-19;1-13(2)26-17-10-14(3)16(11-24-17)19-18(22(30)28-9-7-8-15(28)4)27-21(32-19)20(29)25-12-23(5,6)31;2*1-11(2)24-17-8-12(3)14(10-23-17)19-18(22(30)27-7-5-6-13(27)4)26-21(31-19)20(29)25-15-9-16(15)28/h9,11,15-17,36H,6-8,10,12-13H2,1-5H3,(H,29,31)(H,30,34);12,14,16,19,35H,4-11,15H2,1-3H3,(H,28,30)(H,29,33);10-11,13,15,31H,7-9,12H2,1-6H3,(H,24,26)(H,25,29);2*8,10-11,13,15-16,28H,5-7,9H2,1-4H3,(H,23,24)(H,25,29)/t15-,16?;16-;15-;13-,15+,16+;13-,15-,16-/m00000/s1
• InChIKey: JZGBLIUUQDBZDP-FLWMBNFESA-N
• XLogP: 17.53
• TPSA: 561.04 Ų
• H-Bond Donors: 15
• H-Bond Acceptors: 36
• Rotatable Bonds: 34
• Heavy Atoms: 167
• Complexity: —

Lipinski Rule of Five

4 violations

Rule	Value
MW ≤ 500	2393.09
LogP ≤ 5	17.53
H-Bond Donors ≤ 5	15
H-Bond Acceptors ≤ 10	36

Frequently Asked Questions

What is the IUPAC name of 5-[5-cyano-6-(cyclohexylamino)-3-pyridinyl]-N-(2-hydroxy-2-methylpropyl)-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;5-[6-(1-cyclobutylethylamino)-4-methyl-3-pyridinyl]-4-[(2S)-4,4-difluoro-2-methylpyrrolidine-1-carbonyl]-N-(2-hydroxy-2-methylpropyl)-1,3-thiazole-2-carboxamide;N-[(1S,2S)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-[(1R,2R)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-(2-hydroxy-2-methylpropyl)-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide?

The IUPAC name of 5-[5-cyano-6-(cyclohexylamino)-3-pyridinyl]-N-(2-hydroxy-2-methylpropyl)-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;5-[6-(1-cyclobutylethylamino)-4-methyl-3-pyridinyl]-4-[(2S)-4,4-difluoro-2-methylpyrrolidine-1-carbonyl]-N-(2-hydroxy-2-methylpropyl)-1,3-thiazole-2-carboxamide;N-[(1S,2S)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-[(1R,2R)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-(2-hydroxy-2-methylpropyl)-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide (CID 159067535) is 5-[5-cyano-6-(cyclohexylamino)-3-pyridinyl]-N-(2-hydroxy-2-methylpropyl)-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;5-[6-(1-cyclobutylethylamino)-4-methyl-3-pyridinyl]-4-[(2S)-4,4-difluoro-2-methylpyrrolidine-1-carbonyl]-N-(2-hydroxy-2-methylpropyl)-1,3-thiazole-2-carboxamide;N-[(1S,2S)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-[(1R,2R)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-(2-hydroxy-2-methylpropyl)-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide.

What is the SMILES notation for 5-[5-cyano-6-(cyclohexylamino)-3-pyridinyl]-N-(2-hydroxy-2-methylpropyl)-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;5-[6-(1-cyclobutylethylamino)-4-methyl-3-pyridinyl]-4-[(2S)-4,4-difluoro-2-methylpyrrolidine-1-carbonyl]-N-(2-hydroxy-2-methylpropyl)-1,3-thiazole-2-carboxamide;N-[(1S,2S)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-[(1R,2R)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-(2-hydroxy-2-methylpropyl)-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide?

The canonical SMILES for 5-[5-cyano-6-(cyclohexylamino)-3-pyridinyl]-N-(2-hydroxy-2-methylpropyl)-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;5-[6-(1-cyclobutylethylamino)-4-methyl-3-pyridinyl]-4-[(2S)-4,4-difluoro-2-methylpyrrolidine-1-carbonyl]-N-(2-hydroxy-2-methylpropyl)-1,3-thiazole-2-carboxamide;N-[(1S,2S)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-[(1R,2R)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-(2-hydroxy-2-methylpropyl)-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide is C[C@H]1CCCN1C(=O)c1nc(C(=O)NCC(C)(C)O)sc1-c1cnc(NC2CCCCC2)c(C#N)c1.Cc1cc(NC(C)C)ncc1-c1sc(C(=O)NCC(C)(C)O)nc1C(=O)N1CCC[C@@H]1C.Cc1cc(NC(C)C)ncc1-c1sc(C(=O)N[C@@H]2C[C@H]2O)nc1C(=O)N1CCC[C@@H]1C.Cc1cc(NC(C)C)ncc1-c1sc(C(=O)N[C@H]2C[C@@H]2O)nc1C(=O)N1CCC[C@@H]1C.Cc1cc(NC(C)C2CCC2)ncc1-c1sc(C(=O)NCC(C)(C)O)nc1C(=O)N1CC(F)(F)C[C@@H]1C.

What is the InChIKey of 5-[5-cyano-6-(cyclohexylamino)-3-pyridinyl]-N-(2-hydroxy-2-methylpropyl)-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;5-[6-(1-cyclobutylethylamino)-4-methyl-3-pyridinyl]-4-[(2S)-4,4-difluoro-2-methylpyrrolidine-1-carbonyl]-N-(2-hydroxy-2-methylpropyl)-1,3-thiazole-2-carboxamide;N-[(1S,2S)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-[(1R,2R)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-(2-hydroxy-2-methylpropyl)-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide?

The InChIKey is JZGBLIUUQDBZDP-FLWMBNFESA-N. The full InChI is InChI=1S/C26H35F2N5O3S.C26H34N6O3S.C23H33N5O3S.2C22H29N5O3S/c1-14-9-19(31-16(3)17-7-6-8-17)29-11-18(14)21-20(24(35)33-13-26(27,28)10-15(33)2)32-23(37-21)22(34)30-12-25(4,5)36;1-16-8-7-11-32(16)25(34)20-21(36-24(31-20)23(33)29-15-26(2,3)35)18-12-17(13-27)22(28-14-18)30-19-9-5-4-6-10-19;1-13(2)26-17-10-14(3)16(11-24-17)19-18(22(30)28-9-7-8-15(28)4)27-21(32-19)20(29)25-12-23(5,6)31;2*1-11(2)24-17-8-12(3)14(10-23-17)19-18(22(30)27-7-5-6-13(27)4)26-21(31-19)20(29)25-15-9-16(15)28/h9,11,15-17,36H,6-8,10,12-13H2,1-5H3,(H,29,31)(H,30,34);12,14,16,19,35H,4-11,15H2,1-3H3,(H,28,30)(H,29,33);10-11,13,15,31H,7-9,12H2,1-6H3,(H,24,26)(H,25,29);2*8,10-11,13,15-16,28H,5-7,9H2,1-4H3,(H,23,24)(H,25,29)/t15-,16?;16-;15-;13-,15+,16+;13-,15-,16-/m00000/s1.

What are the key properties of 5-[5-cyano-6-(cyclohexylamino)-3-pyridinyl]-N-(2-hydroxy-2-methylpropyl)-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;5-[6-(1-cyclobutylethylamino)-4-methyl-3-pyridinyl]-4-[(2S)-4,4-difluoro-2-methylpyrrolidine-1-carbonyl]-N-(2-hydroxy-2-methylpropyl)-1,3-thiazole-2-carboxamide;N-[(1S,2S)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-[(1R,2R)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-(2-hydroxy-2-methylpropyl)-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide?

5-[5-cyano-6-(cyclohexylamino)-3-pyridinyl]-N-(2-hydroxy-2-methylpropyl)-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;5-[6-(1-cyclobutylethylamino)-4-methyl-3-pyridinyl]-4-[(2S)-4,4-difluoro-2-methylpyrrolidine-1-carbonyl]-N-(2-hydroxy-2-methylpropyl)-1,3-thiazole-2-carboxamide;N-[(1S,2S)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-[(1R,2R)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-(2-hydroxy-2-methylpropyl)-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide has a molecular weight of 2393.09 g/mol, XLogP of 17.53, 34 rotatable bonds, 15 hydrogen bond donors, and 36 hydrogen bond acceptors.

Where does this data come from?

All data for 5-[5-cyano-6-(cyclohexylamino)-3-pyridinyl]-N-(2-hydroxy-2-methylpropyl)-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;5-[6-(1-cyclobutylethylamino)-4-methyl-3-pyridinyl]-4-[(2S)-4,4-difluoro-2-methylpyrrolidine-1-carbonyl]-N-(2-hydroxy-2-methylpropyl)-1,3-thiazole-2-carboxamide;N-[(1S,2S)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-[(1R,2R)-2-hydroxycyclopropyl]-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide;N-(2-hydroxy-2-methylpropyl)-5-[4-methyl-6-(propan-2-ylamino)-3-pyridinyl]-4-[(2S)-2-methylpyrrolidine-1-carbonyl]-1,3-thiazole-2-carboxamide is sourced from PubChem (CID 159067535), the world's largest open chemistry database maintained by the National Library of Medicine (NIH).