1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-(3-methylimidazol-4-yl)methyl]piperidin-1-yl]ethanone;1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-phenylmethyl]piperidin-1-yl]ethanone;[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-(3-methylimidazol-4-yl)-(1-methylsulfonylpiperidin-4-yl)methanol;[4-chloro-3-[(4,4-difluorocyclohexyl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;[4-chloro-3-[(1,1-dioxothian-4-yl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;(4-chlorophenyl)-[2,4-dichloro-3-(piperidin-1-ylmethyl)quinolin-6-yl]-(3-methylimidazol-4-yl)methanol

C169H196Cl8F2N24O17S2 — CID 158561547

About 1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-(3-methylimidazol-4-yl)methyl]piperidin-1-yl]ethanone;1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-phenylmethyl]piperidin-1-yl]ethanone;[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-(3-methylimidazol-4-yl)-(1-methylsulfonylpiperidin-4-yl)methanol;[4-chloro-3-[(4,4-difluorocyclohexyl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;[4-chloro-3-[(1,1-dioxothian-4-yl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;(4-chlorophenyl)-[2,4-dichloro-3-(piperidin-1-ylmethyl)quinolin-6-yl]-(3-methylimidazol-4-yl)methanol

1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-(3-methylimidazol-4-yl)methyl]piperidin-1-yl]ethanone;1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-phenylmethyl]piperidin-1-yl]ethanone;[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-(3-methylimidazol-4-yl)-(1-methylsulfonylpiperidin-4-yl)methanol;[4-chloro-3-[(4,4-difluorocyclohexyl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;[4-chloro-3-[(1,1-dioxothian-4-yl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;(4-chlorophenyl)-[2,4-dichloro-3-(piperidin-1-ylmethyl)quinolin-6-yl]-(3-methylimidazol-4-yl)methanol (PubChem CID 158561547) has the molecular formula C169H196Cl8F2N24O17S2 and a molecular weight of 3221.33 g/mol. Its IUPAC name is 1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-(3-methylimidazol-4-yl)methyl]piperidin-1-yl]ethanone;1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-phenylmethyl]piperidin-1-yl]ethanone;[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-(3-methylimidazol-4-yl)-(1-methylsulfonylpiperidin-4-yl)methanol;[4-chloro-3-[(4,4-difluorocyclohexyl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;[4-chloro-3-[(1,1-dioxothian-4-yl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;(4-chlorophenyl)-[2,4-dichloro-3-(piperidin-1-ylmethyl)quinolin-6-yl]-(3-methylimidazol-4-yl)methanol.

Molecular Properties

• Compound Name: 1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-(3-methylimidazol-4-yl)methyl]piperidin-1-yl]ethanone;1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-phenylmethyl]piperidin-1-yl]ethanone;[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-(3-methylimidazol-4-yl)-(1-methylsulfonylpiperidin-4-yl)methanol;[4-chloro-3-[(4,4-difluorocyclohexyl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;[4-chloro-3-[(1,1-dioxothian-4-yl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;(4-chlorophenyl)-[2,4-dichloro-3-(piperidin-1-ylmethyl)quinolin-6-yl]-(3-methylimidazol-4-yl)methanol
• PubChem CID: 158561547
• Molecular Formula: C169H196Cl8F2N24O17S2
• Molecular Weight: 3221.33 g/mol
• Exact Mass: 3215.21
• IUPAC Name: 1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-(3-methylimidazol-4-yl)methyl]piperidin-1-yl]ethanone;1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-phenylmethyl]piperidin-1-yl]ethanone;[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-(3-methylimidazol-4-yl)-(1-methylsulfonylpiperidin-4-yl)methanol;[4-chloro-3-[(4,4-difluorocyclohexyl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;[4-chloro-3-[(1,1-dioxothian-4-yl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;(4-chlorophenyl)-[2,4-dichloro-3-(piperidin-1-ylmethyl)quinolin-6-yl]-(3-methylimidazol-4-yl)methanol
• SMILES: COc1nc2ccc(C(O)(c3ccc(C)nc3C)c3cnnn3C)cc2c(Cl)c1CC1CCC(F)(F)CC1.COc1nc2ccc(C(O)(c3ccc(C)nc3C)c3cnnn3C)cc2c(Cl)c1CC1CCS(=O)(=O)CC1.COc1nc2ccc(C(O)(c3ccccc3)C3CCN(C(C)=O)CC3)cc2c(Cl)c1CC1CCCCC1.COc1nc2ccc(C(O)(c3cncn3C)C3CCN(C(C)=O)CC3)cc2c(Cl)c1CC1CCCCC1.COc1nc2ccc(C(O)(c3cncn3C)C3CCN(S(C)(=O)=O)CC3)cc2c(Cl)c1CC1CCCCC1.Cn1cncc1C(O)(c1ccc(Cl)cc1)c1ccc2nc(Cl)c(CN3CCCCC3)c(Cl)c2c1
• InChI: InChI=1S/C31H37ClN2O3.C29H37ClN4O3.C28H30ClF2N5O2.C28H37ClN4O4S.C27H30ClN5O4S.C26H25Cl3N4O/c1-21(35)34-17-15-24(16-18-34)31(36,23-11-7-4-8-12-23)25-13-14-28-26(20-25)29(32)27(30(33-28)37-2)19-22-9-5-3-6-10-22;1-19(35)34-13-11-21(12-14-34)29(36,26-17-31-18-33(26)2)22-9-10-25-23(16-22)27(30)24(28(32-25)37-3)15-20-7-5-4-6-8-20;1-16-5-7-22(17(2)33-16)28(37,24-15-32-35-36(24)3)19-6-8-23-20(14-19)25(29)21(26(34-23)38-4)13-18-9-11-27(30,31)12-10-18;1-32-18-30-17-25(32)28(34,20-11-13-33(14-12-20)38(3,35)36)21-9-10-24-22(16-21)26(29)23(27(31-24)37-2)15-19-7-5-4-6-8-19;1-16-5-7-22(17(2)30-16)27(34,24-15-29-32-33(24)3)19-6-8-23-20(14-19)25(28)21(26(31-23)37-4)13-18-9-11-38(35,36)12-10-18;1-32-16-30-14-23(32)26(34,17-5-8-19(27)9-6-17)18-7-10-22-20(13-18)24(28)21(25(29)31-22)15-33-11-3-2-4-12-33/h4,7-8,11-14,20,22,24,36H,3,5-6,9-10,15-19H2,1-2H3;9-10,16-18,20-21,36H,4-8,11-15H2,1-3H3;5-8,14-15,18,37H,9-13H2,1-4H3;9-10,16-20,34H,4-8,11-15H2,1-3H3;5-8,14-15,18,34H,9-13H2,1-4H3;5-10,13-14,16,34H,2-4,11-12,15H2,1H3
• InChIKey: HQYHAQGJGXGMBO-UHFFFAOYSA-N
• XLogP: 32.00
• TPSA: 500.91 Ų
• H-Bond Donors: 6
• H-Bond Acceptors: 38
• Rotatable Bonds: 36
• Heavy Atoms: 222
• Complexity: —

Lipinski Rule of Five

4 violations

Rule	Value
MW ≤ 500	3221.33
LogP ≤ 5	32.00
H-Bond Donors ≤ 5	6
H-Bond Acceptors ≤ 10	38

Computed Properties (RDKit)

• Structural Alerts: {'alert_name': '2-halo_pyridine', 'substructure': 'N/A'}

Frequently Asked Questions

What is the IUPAC name of 1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-(3-methylimidazol-4-yl)methyl]piperidin-1-yl]ethanone;1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-phenylmethyl]piperidin-1-yl]ethanone;[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-(3-methylimidazol-4-yl)-(1-methylsulfonylpiperidin-4-yl)methanol;[4-chloro-3-[(4,4-difluorocyclohexyl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;[4-chloro-3-[(1,1-dioxothian-4-yl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;(4-chlorophenyl)-[2,4-dichloro-3-(piperidin-1-ylmethyl)quinolin-6-yl]-(3-methylimidazol-4-yl)methanol?

The IUPAC name of 1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-(3-methylimidazol-4-yl)methyl]piperidin-1-yl]ethanone;1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-phenylmethyl]piperidin-1-yl]ethanone;[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-(3-methylimidazol-4-yl)-(1-methylsulfonylpiperidin-4-yl)methanol;[4-chloro-3-[(4,4-difluorocyclohexyl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;[4-chloro-3-[(1,1-dioxothian-4-yl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;(4-chlorophenyl)-[2,4-dichloro-3-(piperidin-1-ylmethyl)quinolin-6-yl]-(3-methylimidazol-4-yl)methanol (CID 158561547) is 1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-(3-methylimidazol-4-yl)methyl]piperidin-1-yl]ethanone;1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-phenylmethyl]piperidin-1-yl]ethanone;[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-(3-methylimidazol-4-yl)-(1-methylsulfonylpiperidin-4-yl)methanol;[4-chloro-3-[(4,4-difluorocyclohexyl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;[4-chloro-3-[(1,1-dioxothian-4-yl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;(4-chlorophenyl)-[2,4-dichloro-3-(piperidin-1-ylmethyl)quinolin-6-yl]-(3-methylimidazol-4-yl)methanol.

What is the SMILES notation for 1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-(3-methylimidazol-4-yl)methyl]piperidin-1-yl]ethanone;1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-phenylmethyl]piperidin-1-yl]ethanone;[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-(3-methylimidazol-4-yl)-(1-methylsulfonylpiperidin-4-yl)methanol;[4-chloro-3-[(4,4-difluorocyclohexyl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;[4-chloro-3-[(1,1-dioxothian-4-yl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;(4-chlorophenyl)-[2,4-dichloro-3-(piperidin-1-ylmethyl)quinolin-6-yl]-(3-methylimidazol-4-yl)methanol?

The canonical SMILES for 1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-(3-methylimidazol-4-yl)methyl]piperidin-1-yl]ethanone;1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-phenylmethyl]piperidin-1-yl]ethanone;[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-(3-methylimidazol-4-yl)-(1-methylsulfonylpiperidin-4-yl)methanol;[4-chloro-3-[(4,4-difluorocyclohexyl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;[4-chloro-3-[(1,1-dioxothian-4-yl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;(4-chlorophenyl)-[2,4-dichloro-3-(piperidin-1-ylmethyl)quinolin-6-yl]-(3-methylimidazol-4-yl)methanol is COc1nc2ccc(C(O)(c3ccc(C)nc3C)c3cnnn3C)cc2c(Cl)c1CC1CCC(F)(F)CC1.COc1nc2ccc(C(O)(c3ccc(C)nc3C)c3cnnn3C)cc2c(Cl)c1CC1CCS(=O)(=O)CC1.COc1nc2ccc(C(O)(c3ccccc3)C3CCN(C(C)=O)CC3)cc2c(Cl)c1CC1CCCCC1.COc1nc2ccc(C(O)(c3cncn3C)C3CCN(C(C)=O)CC3)cc2c(Cl)c1CC1CCCCC1.COc1nc2ccc(C(O)(c3cncn3C)C3CCN(S(C)(=O)=O)CC3)cc2c(Cl)c1CC1CCCCC1.Cn1cncc1C(O)(c1ccc(Cl)cc1)c1ccc2nc(Cl)c(CN3CCCCC3)c(Cl)c2c1.

What is the InChIKey of 1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-(3-methylimidazol-4-yl)methyl]piperidin-1-yl]ethanone;1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-phenylmethyl]piperidin-1-yl]ethanone;[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-(3-methylimidazol-4-yl)-(1-methylsulfonylpiperidin-4-yl)methanol;[4-chloro-3-[(4,4-difluorocyclohexyl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;[4-chloro-3-[(1,1-dioxothian-4-yl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;(4-chlorophenyl)-[2,4-dichloro-3-(piperidin-1-ylmethyl)quinolin-6-yl]-(3-methylimidazol-4-yl)methanol?

The InChIKey is HQYHAQGJGXGMBO-UHFFFAOYSA-N. The full InChI is InChI=1S/C31H37ClN2O3.C29H37ClN4O3.C28H30ClF2N5O2.C28H37ClN4O4S.C27H30ClN5O4S.C26H25Cl3N4O/c1-21(35)34-17-15-24(16-18-34)31(36,23-11-7-4-8-12-23)25-13-14-28-26(20-25)29(32)27(30(33-28)37-2)19-22-9-5-3-6-10-22;1-19(35)34-13-11-21(12-14-34)29(36,26-17-31-18-33(26)2)22-9-10-25-23(16-22)27(30)24(28(32-25)37-3)15-20-7-5-4-6-8-20;1-16-5-7-22(17(2)33-16)28(37,24-15-32-35-36(24)3)19-6-8-23-20(14-19)25(29)21(26(34-23)38-4)13-18-9-11-27(30,31)12-10-18;1-32-18-30-17-25(32)28(34,20-11-13-33(14-12-20)38(3,35)36)21-9-10-24-22(16-21)26(29)23(27(31-24)37-2)15-19-7-5-4-6-8-19;1-16-5-7-22(17(2)30-16)27(34,24-15-29-32-33(24)3)19-6-8-23-20(14-19)25(28)21(26(31-23)37-4)13-18-9-11-38(35,36)12-10-18;1-32-16-30-14-23(32)26(34,17-5-8-19(27)9-6-17)18-7-10-22-20(13-18)24(28)21(25(29)31-22)15-33-11-3-2-4-12-33/h4,7-8,11-14,20,22,24,36H,3,5-6,9-10,15-19H2,1-2H3;9-10,16-18,20-21,36H,4-8,11-15H2,1-3H3;5-8,14-15,18,37H,9-13H2,1-4H3;9-10,16-20,34H,4-8,11-15H2,1-3H3;5-8,14-15,18,34H,9-13H2,1-4H3;5-10,13-14,16,34H,2-4,11-12,15H2,1H3.

What are the key properties of 1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-(3-methylimidazol-4-yl)methyl]piperidin-1-yl]ethanone;1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-phenylmethyl]piperidin-1-yl]ethanone;[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-(3-methylimidazol-4-yl)-(1-methylsulfonylpiperidin-4-yl)methanol;[4-chloro-3-[(4,4-difluorocyclohexyl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;[4-chloro-3-[(1,1-dioxothian-4-yl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;(4-chlorophenyl)-[2,4-dichloro-3-(piperidin-1-ylmethyl)quinolin-6-yl]-(3-methylimidazol-4-yl)methanol?

1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-(3-methylimidazol-4-yl)methyl]piperidin-1-yl]ethanone;1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-phenylmethyl]piperidin-1-yl]ethanone;[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-(3-methylimidazol-4-yl)-(1-methylsulfonylpiperidin-4-yl)methanol;[4-chloro-3-[(4,4-difluorocyclohexyl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;[4-chloro-3-[(1,1-dioxothian-4-yl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;(4-chlorophenyl)-[2,4-dichloro-3-(piperidin-1-ylmethyl)quinolin-6-yl]-(3-methylimidazol-4-yl)methanol has a molecular weight of 3221.33 g/mol, XLogP of 32.00, 36 rotatable bonds, 6 hydrogen bond donors, and 38 hydrogen bond acceptors.

Where does this data come from?

All data for 1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-(3-methylimidazol-4-yl)methyl]piperidin-1-yl]ethanone;1-[4-[[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-hydroxy-phenylmethyl]piperidin-1-yl]ethanone;[4-chloro-3-(cyclohexylmethyl)-2-methoxyquinolin-6-yl]-(3-methylimidazol-4-yl)-(1-methylsulfonylpiperidin-4-yl)methanol;[4-chloro-3-[(4,4-difluorocyclohexyl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;[4-chloro-3-[(1,1-dioxothian-4-yl)methyl]-2-methoxyquinolin-6-yl]-(2,6-dimethyl-3-pyridinyl)-(3-methyltriazol-4-yl)methanol;(4-chlorophenyl)-[2,4-dichloro-3-(piperidin-1-ylmethyl)quinolin-6-yl]-(3-methylimidazol-4-yl)methanol is sourced from PubChem (CID 158561547), the world's largest open chemistry database maintained by the National Library of Medicine (NIH).