CompoundLookup Search compounds by elements

Sulfur + Oxygen Compounds (S + O)

Browse all compounds containing Sulfur + Oxygen by molecular formula, IUPAC name, or traditional name. Explore molecular weights and compound details.

We're currently updating our database. We've sourced 10 million compounds so far, with the full 170 million coming shortly.
Total Compounds: 2,691,271
Showing 2,572,901 - 2,572,950 of 2,691,271
Page 51459 of 53,826
CID Formula IUPAC Name Traditional Name Mol. Weight
6591831 C20H21N3O4S (1R,9S,13R)-10-(4-ethoxyphenyl)-9,13-dimethyl-4-nitro-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-11-thione (1R,9S,13R)-10-(4-ethoxyphenyl)-9,13-dimethyl-4-nitro-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-11-thione 399.5
6591832 C21H23N3O3S2 4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[2-(p-tolyl)ethyl]benzamide 4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[2-(p-tolyl)ethyl]benzamide 429.6
6591833 C18H23N3O3S2 4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-cyclohexyl-benzamide 4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-cyclohexyl-benzamide 393.5
6591834 C21H21N3O3S2 [4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-(3,4-dihydro-1H-isoquinolin-2-yl)methanone [4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-(3,4-dihydro-1H-isoquinolin-2-yl)methanone 427.5
6591835 C20H25N3O3S2 4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[2-(cyclohexen-1-yl)ethyl]benzamide 4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[2-(cyclohexen-1-yl)ethyl]benzamide 419.6
6591836 C19H18ClN3O3S2 4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[(2-chlorophenyl)methyl]benzamide 4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[(2-chlorophenyl)methyl]benzamide 436.0
6591837 C22H24N4O3S2 [4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-(4-phenylpiperazin-1-yl)methanone [4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-(4-phenylpiperazin-1-yl)methanone 456.6
6591838 C22H25N3O5S2 4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[2-(3,4-dimethoxyphenyl)ethyl]benzamide 4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[2-(3,4-dimethoxyphenyl)ethyl]benzamide 475.6
6591839 C20H20ClN3O3S2 4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[2-(4-chlorophenyl)ethyl]benzamide 4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[2-(4-chlorophenyl)ethyl]benzamide 450.0
6591848 C20H19BrN2O3S ethyl (1S,9R,13S)-4-bromo-9-methyl-10-phenyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate ethyl (1S,9R,13S)-4-bromo-9-methyl-10-phenyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate 447.3
6591849 C21H22N2O4S ethyl (1S,9R,13S)-5-methoxy-9-methyl-10-phenyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate ethyl (1S,9R,13S)-5-methoxy-9-methyl-10-phenyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate 398.5
6591850 C20H19ClN2O3S ethyl (1S,9R,13S)-10-(3-chlorophenyl)-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2,4,6-triene-13-carboxylate ethyl (1S,9R,13S)-10-(3-chlorophenyl)-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2,4,6-triene-13-carboxylate 402.9
6591851 C20H18Cl2N2O3S ethyl (1S,9R,13S)-4-chloro-10-(3-chlorophenyl)-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate ethyl (1S,9R,13S)-4-chloro-10-(3-chlorophenyl)-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate 437.3
6591852 C21H21ClN2O4S ethyl (1S,9R,13S)-10-(3-chlorophenyl)-6-methoxy-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate ethyl (1S,9R,13S)-10-(3-chlorophenyl)-6-methoxy-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate 432.9
6591853 C21H21BrN2O4S ethyl (1S,9R,13S)-10-(4-bromophenyl)-6-methoxy-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate ethyl (1S,9R,13S)-10-(4-bromophenyl)-6-methoxy-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate 477.4
6591854 C21H21ClN2O3S ethyl (1S,9R,13S)-4-chloro-9-methyl-10-(o-tolyl)-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate ethyl (1S,9R,13S)-4-chloro-9-methyl-10-(o-tolyl)-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate 416.9
6591855 C21H21ClN2O3S ethyl (1S,9R,13S)-4-chloro-9-methyl-10-(m-tolyl)-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate ethyl (1S,9R,13S)-4-chloro-9-methyl-10-(m-tolyl)-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate 416.9
6591856 C21H22N2O3S ethyl (1S,9R,13S)-9-methyl-10-(p-tolyl)-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2,4,6-triene-13-carboxylate ethyl (1S,9R,13S)-9-methyl-10-(p-tolyl)-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2,4,6-triene-13-carboxylate 382.5
6591857 C20H18BrFN2O3S ethyl (1S,9R,13S)-4-bromo-10-(4-fluorophenyl)-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate ethyl (1S,9R,13S)-4-bromo-10-(4-fluorophenyl)-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate 465.3
6591858 C17H22N2O4S ethyl (1R,9S,13R)-10-ethyl-6-methoxy-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate ethyl (1R,9S,13R)-10-ethyl-6-methoxy-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate 350.4
6591859 C18H23BrN2O4S ethyl (1S,9R,13S)-4-bromo-10-(3-methoxypropyl)-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate ethyl (1S,9R,13S)-4-bromo-10-(3-methoxypropyl)-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate 443.4
6591860 C25H30N2O6S ethyl (1S,9R,13S)-10-[2-(3,4-dimethoxyphenyl)ethyl]-6-methoxy-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate ethyl (1S,9R,13S)-10-[2-(3,4-dimethoxyphenyl)ethyl]-6-methoxy-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxylate 486.6
6591861 C21H23N3O3S (1S,9R,13S)-N-(2,4-dimethylphenyl)-6-methoxy-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxamide (1S,9R,13S)-N-(2,4-dimethylphenyl)-6-methoxy-9-methyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxamide 397.5
6591862 C28H29N3O3S (1R,9S,13R)-N-(2,4-dimethylphenyl)-6-methoxy-9-methyl-10-(p-tolyl)-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxamide (1R,9S,13R)-N-(2,4-dimethylphenyl)-6-methoxy-9-methyl-10-(p-tolyl)-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2(7),3,5-triene-13-carboxamide 487.6
6591863 C18H25N3O3S (1S,9S,13R)-10-(3-methoxypropyl)-N,N,9-trimethyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2,4,6-triene-13-carboxamide (1S,9S,13R)-10-(3-methoxypropyl)-N,N,9-trimethyl-11-thioxo-8-oxa-10,12-diazatricyclo[7.3.1.02,7]trideca-2,4,6-triene-13-carboxamide 363.5
6591864 C19H16BrClN2OS (1S,9R,10R)-6-bromo-14-(3-chlorophenyl)-2-oxa-14,16-diazatetracyclo[7.4.3.01,10.03,8]hexadeca-3(8),4,6-triene-15-thione (1S,9R,10R)-6-bromo-14-(3-chlorophenyl)-2-oxa-14,16-diazatetracyclo[7.4.3.01,10.03,8]hexadeca-3(8),4,6-triene-15-thione 435.8
6591865 C11H10Cl2N2O2S2 (3aS,6aR)-N-(3,4-dichlorophenyl)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-amine (3aS,6aR)-N-(3,4-dichlorophenyl)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-amine 337.2
6591866 C19H19N3O3S2 4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-benzyl-benzamide 4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-benzyl-benzamide 401.5
6591867 C21H22N2O6S ethyl (4Z,5S,6R)-4-(benzenesulfonylmethylene)-6-(2-methoxyphenyl)-2-oxo-hexahydropyrimidine-5-carboxylate ethyl (4Z,5S,6R)-4-(benzenesulfonylmethylene)-6-(2-methoxyphenyl)-2-oxo-hexahydropyrimidine-5-carboxylate 430.5
6591868 C21H21ClN2O6S ethyl (4Z,5S,6R)-4-[(4-chlorophenyl)sulfonylmethylene]-6-(2-methoxyphenyl)-2-oxo-hexahydropyrimidine-5-carboxylate ethyl (4Z,5S,6R)-4-[(4-chlorophenyl)sulfonylmethylene]-6-(2-methoxyphenyl)-2-oxo-hexahydropyrimidine-5-carboxylate 464.9
6591869 C22H24N2O6S ethyl (4R,5S,6Z)-4-(2-methoxyphenyl)-2-oxo-6-(p-tolylsulfonylmethylene)hexahydropyrimidine-5-carboxylate ethyl (4R,5S,6Z)-4-(2-methoxyphenyl)-2-oxo-6-(p-tolylsulfonylmethylene)hexahydropyrimidine-5-carboxylate 444.5
6591870 C23H26N2O6S ethyl (4R)-6-[(3,4-dimethylphenyl)sulfonylmethyl]-4-(2-methoxyphenyl)-2-oxo-3,4-dihydro-1H-pyrimidine-5-carboxylate ethyl (4R)-6-[(3,4-dimethylphenyl)sulfonylmethyl]-4-(2-methoxyphenyl)-2-oxo-3,4-dihydro-1H-pyrimidine-5-carboxylate 458.5
6591871 C23H26N2O6S ethyl (4Z,5S,6R)-4-[(3,4-dimethylphenyl)sulfonylmethylene]-6-(2-methoxyphenyl)-2-oxo-hexahydropyrimidine-5-carboxylate ethyl (4Z,5S,6R)-4-[(3,4-dimethylphenyl)sulfonylmethylene]-6-(2-methoxyphenyl)-2-oxo-hexahydropyrimidine-5-carboxylate 458.5
6591872 C20H27N3O3S2 2-[4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-N-cyclohexyl-N-methyl-acetamide 2-[4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-N-cyclohexyl-N-methyl-acetamide 421.6
6591873 C17H18Cl3N3OS N-[(1R)-2,2,2-trichloro-1-(1-naphthylcarbamothioylamino)ethyl]butanamide N-[(1R)-2,2,2-trichloro-1-(1-naphthylcarbamothioylamino)ethyl]butanamide 418.8
6591874 C24H18ClNO4S3 [4-[(Z)-[4-oxo-3-[[(2R)-tetrahydrofuran-2-yl]methyl]-2-thioxo-thiazolidin-5-ylidene]methyl]phenyl] 3-chlorobenzothiophene-2-carboxylate [4-[(Z)-[4-oxo-3-[[(2R)-tetrahydrofuran-2-yl]methyl]-2-thioxo-thiazolidin-5-ylidene]methyl]phenyl] 3-chlorobenzothiophene-2-carboxylate 516.1
6591876 C20H19N3O5S2 3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-(1,3-benzodioxol-5-ylmethyl)benzamide 3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-(1,3-benzodioxol-5-ylmethyl)benzamide 445.5
6591877 C19H18ClN3O3S2 3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[(4-chlorophenyl)methyl]benzamide 3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[(4-chlorophenyl)methyl]benzamide 436.0
6591878 C20H21N3O4S2 3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[(4-methoxyphenyl)methyl]benzamide 3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[(4-methoxyphenyl)methyl]benzamide 431.5
6591879 C20H20ClN3O3S2 3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[2-(4-chlorophenyl)ethyl]benzamide 3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-[2-(4-chlorophenyl)ethyl]benzamide 450.0
6591880 C19H27N3O5S2 3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-(3,3-diethoxypropyl)benzamide 3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-N-(3,3-diethoxypropyl)benzamide 441.6
6591881 C22H23FN4O3S2 [3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-[4-(4-fluorophenyl)piperazin-1-yl]methanone [3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-[4-(4-fluorophenyl)piperazin-1-yl]methanone 474.6
6591882 C17H20N2O3S (5Z)-2-[(2S,6S)-2,6-dimethylmorpholin-4-yl]-5-[(4-methoxyphenyl)methylene]thiazol-4-one (5Z)-2-[(2S,6S)-2,6-dimethylmorpholin-4-yl]-5-[(4-methoxyphenyl)methylene]thiazol-4-one 332.4
6591883 C21H24N5O3S2+ [3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-(4-pyridin-1-ium-2-ylpiperazin-1-yl)methanone [3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-(4-pyridin-1-ium-2-ylpiperazin-1-yl)methanone 458.6
6591884 C21H23N5O3S2 [3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-[4-(2-pyridyl)piperazin-1-yl]methanone [3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-[4-(2-pyridyl)piperazin-1-yl]methanone 457.6
6591885 C23H26N4O4S2 [3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-[4-(2-methoxyphenyl)piperazin-1-yl]methanone [3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-[4-(2-methoxyphenyl)piperazin-1-yl]methanone 486.6
6591886 C20H29N4O4S2+ 2-[4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-N-(3-morpholin-4-ium-4-ylpropyl)acetamide 2-[4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-N-(3-morpholin-4-ium-4-ylpropyl)acetamide 453.6
6591887 C20H28N4O4S2 2-[4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-N-(3-morpholinopropyl)acetamide 2-[4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]-N-(3-morpholinopropyl)acetamide 452.6
6591888 C19H24N4O4S2 1-[2-[4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]acetyl]piperidine-4-carboxamide 1-[2-[4-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]phenyl]acetyl]piperidine-4-carboxamide 436.6
6591889 C22H23ClN4O3S2 [3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-4-chloro-phenyl]-(4-phenylpiperazin-1-yl)methanone [3-[[(3aS,6aR)-5,5-dioxo-3a,4,6,6a-tetrahydrothieno[3,4-d]thiazol-2-yl]amino]-4-chloro-phenyl]-(4-phenylpiperazin-1-yl)methanone 491.0

Related Element Combinations

Explore other compound combinations that include similar elements. Discover more chemistry by browsing related searches.

Looking for a specific combination?

Select any elements from the periodic table and discover all known compounds instantly.

NIH

Data Sourced from PubChem

All compound data on CompoundLookup comes from PubChem, the world's largest free chemistry database maintained by the National Institutes of Health (NIH). We've indexed and organized this data to enable element-based searching - a feature not available on any other platform. We're constantly adding more compounds and improving our coverage. Learn more about our mission.