Carbon + Hydrogen Compounds (C + H)
Browse all compounds containing Carbon + Hydrogen 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: 6,961,964
Showing 6,734,801 - 6,734,850 of 6,961,964
Page 134697 of 139,240
| CID | Formula | IUPAC Name | Traditional Name | Mol. Weight |
|---|---|---|---|---|
| 6771240 | C31H29N5O2S | 2-[[5-(4-tert-butylphenyl)-4-phenyl-1,2,4-triazol-3-yl]sulfanyl]-N'-[(2-oxo-1-naphthylidene)methyl]acetohydrazide | 2-[[5-(4-tert-butylphenyl)-4-phenyl-1,2,4-triazol-3-yl]sulfanyl]-N'-[(2-oxo-1-naphthylidene)methyl]acetohydrazide | 535.7 |
| 6771241 | C31H29N5O2S | 2-[[5-(4-tert-butylphenyl)-4-phenyl-1,2,4-triazol-3-yl]sulfanyl]-N'-[(2-oxo-1-naphthylidene)methyl]acetohydrazide | 2-[[5-(4-tert-butylphenyl)-4-phenyl-1,2,4-triazol-3-yl]sulfanyl]-N'-[(2-oxo-1-naphthylidene)methyl]acetohydrazide | 535.7 |
| 6771242 | C13H12N2O3 | 2-methyl-N'-[(6-oxocyclohexa-2,4-dien-1-ylidene)methyl]furan-3-carbohydrazide | 2-methyl-N'-[(6-oxocyclohexa-2,4-dien-1-ylidene)methyl]furan-3-carbohydrazide | 244.25 |
| 6771243 | C16H12Br2N4OS | 2,4-dibromo-6-[[[3-(p-tolyl)-5-thioxo-1H-1,2,4-triazol-4-yl]amino]methylene]cyclohexa-2,4-dien-1-one | 2,4-dibromo-6-[[[3-(p-tolyl)-5-thioxo-1H-1,2,4-triazol-4-yl]amino]methylene]cyclohexa-2,4-dien-1-one | 468.2 |
| 6771244 | C16H12Br2N4OS | 2,4-dibromo-6-[[[3-(p-tolyl)-5-thioxo-1H-1,2,4-triazol-4-yl]amino]methylene]cyclohexa-2,4-dien-1-one | 2,4-dibromo-6-[[[3-(p-tolyl)-5-thioxo-1H-1,2,4-triazol-4-yl]amino]methylene]cyclohexa-2,4-dien-1-one | 468.2 |
| 6771245 | C6H11N6S+ | 1-amino-3-[(3-methylimidazol-3-ium-4-ylidene)methylamino]thiourea | 1-amino-3-[(3-methylimidazol-3-ium-4-ylidene)methylamino]thiourea | 199.26 |
| 6771246 | C6H11N6S+ | 1-amino-3-[(3-methylimidazol-3-ium-4-ylidene)methylamino]thiourea | 1-amino-3-[(3-methylimidazol-3-ium-4-ylidene)methylamino]thiourea | 199.26 |
| 6771247 | C19H22Br2N3O+ | 2,4-dibromo-6-[[[4-(p-tolylmethyl)piperazin-4-ium-1-yl]amino]methylene]cyclohexa-2,4-dien-1-one | 2,4-dibromo-6-[[[4-(p-tolylmethyl)piperazin-4-ium-1-yl]amino]methylene]cyclohexa-2,4-dien-1-one | 468.2 |
| 6771248 | C19H21Br2N3O | 2,4-dibromo-6-[[[4-(p-tolylmethyl)piperazin-1-yl]amino]methylene]cyclohexa-2,4-dien-1-one | 2,4-dibromo-6-[[[4-(p-tolylmethyl)piperazin-1-yl]amino]methylene]cyclohexa-2,4-dien-1-one | 467.2 |
| 6771249 | C18H11FN6O2 | 4-[10-(4-fluorophenyl)-3,5,6,8,10,11-hexazatricyclo[7.3.0.02,6]dodeca-1(9),2,7,11-tetraen-4-ylidene]-3-hydroxy-cyclohexa-2,5-dien-1-one | 4-[10-(4-fluorophenyl)-3,5,6,8,10,11-hexazatricyclo[7.3.0.02,6]dodeca-1(9),2,7,11-tetraen-4-ylidene]-3-hydroxy-cyclohexa-2,5-dien-1-one | 362.3 |
| 6771250 | C17H16N4O3 | 2-(3-methyl-5-oxo-1,2-dihydropyrazol-4-yl)-N'-[(2-oxo-1-naphthylidene)methyl]acetohydrazide | 2-(3-methyl-5-oxo-1,2-dihydropyrazol-4-yl)-N'-[(2-oxo-1-naphthylidene)methyl]acetohydrazide | 324.33 |
| 6771251 | C25H31N5O3S | 2-[[5-(4-tert-butylphenyl)-4-ethyl-1,2,4-triazol-3-yl]sulfanyl]-N'-[(5-ethoxy-6-oxo-cyclohexa-2,4-dien-1-ylidene)methyl]acetohydrazide | 2-[[5-(4-tert-butylphenyl)-4-ethyl-1,2,4-triazol-3-yl]sulfanyl]-N'-[(5-ethoxy-6-oxo-cyclohexa-2,4-dien-1-ylidene)methyl]acetohydrazide | 481.6 |
| 6771252 | C25H31N5O3S | 2-[[5-(4-tert-butylphenyl)-4-ethyl-1,2,4-triazol-3-yl]sulfanyl]-N'-[(5-ethoxy-6-oxo-cyclohexa-2,4-dien-1-ylidene)methyl]acetohydrazide | 2-[[5-(4-tert-butylphenyl)-4-ethyl-1,2,4-triazol-3-yl]sulfanyl]-N'-[(5-ethoxy-6-oxo-cyclohexa-2,4-dien-1-ylidene)methyl]acetohydrazide | 481.6 |
| 6771253 | C22H16ClF3N4O3S | methyl (2Z)-2-[1-(1,3-benzothiazol-2-yl)-4-[1-[2-chloro-5-(trifluoromethyl)anilino]ethylidene]-5-oxo-pyrazolidin-3-ylidene]acetate | methyl (2Z)-2-[1-(1,3-benzothiazol-2-yl)-4-[1-[2-chloro-5-(trifluoromethyl)anilino]ethylidene]-5-oxo-pyrazolidin-3-ylidene]acetate | 508.9 |
| 6771254 | C13H13ClN4O3 | N'-[(3-chloro-5-methoxy-6-oxo-cyclohexa-2,4-dien-1-ylidene)methyl]-5-methyl-1H-pyrazole-3-carbohydrazide | N'-[(3-chloro-5-methoxy-6-oxo-cyclohexa-2,4-dien-1-ylidene)methyl]-5-methyl-1H-pyrazole-3-carbohydrazide | 308.72 |
| 6771255 | C14H9Br2N5OS | 2,4-dibromo-6-[[[3-(3-pyridyl)-5-thioxo-1H-1,2,4-triazol-4-yl]amino]methylene]cyclohexa-2,4-dien-1-one | 2,4-dibromo-6-[[[3-(3-pyridyl)-5-thioxo-1H-1,2,4-triazol-4-yl]amino]methylene]cyclohexa-2,4-dien-1-one | 455.1 |
| 6771256 | C26H25N5O3S | N'-[(3-ethoxy-4-oxo-cyclohexa-2,5-dien-1-ylidene)methyl]-2-[[5-phenyl-4-(p-tolyl)-1,2,4-triazol-3-yl]sulfanyl]acetohydrazide | N'-[(3-ethoxy-4-oxo-cyclohexa-2,5-dien-1-ylidene)methyl]-2-[[5-phenyl-4-(p-tolyl)-1,2,4-triazol-3-yl]sulfanyl]acetohydrazide | 487.6 |
| 6771257 | C26H25N5O3S | N'-[(3-ethoxy-4-oxo-cyclohexa-2,5-dien-1-ylidene)methyl]-2-[[5-phenyl-4-(p-tolyl)-1,2,4-triazol-3-yl]sulfanyl]acetohydrazide | N'-[(3-ethoxy-4-oxo-cyclohexa-2,5-dien-1-ylidene)methyl]-2-[[5-phenyl-4-(p-tolyl)-1,2,4-triazol-3-yl]sulfanyl]acetohydrazide | 487.6 |
| 6771258 | C19H23ClN3O2+ | 4-[[[4-[(4-chlorophenyl)methyl]piperazin-4-ium-1-yl]amino]methylene]-2-methoxy-cyclohexa-2,5-dien-1-one | 4-[[[4-[(4-chlorophenyl)methyl]piperazin-4-ium-1-yl]amino]methylene]-2-methoxy-cyclohexa-2,5-dien-1-one | 360.9 |
| 6771259 | C19H22ClN3O2 | 4-[[[4-[(4-chlorophenyl)methyl]piperazin-1-yl]amino]methylene]-2-methoxy-cyclohexa-2,5-dien-1-one | 4-[[[4-[(4-chlorophenyl)methyl]piperazin-1-yl]amino]methylene]-2-methoxy-cyclohexa-2,5-dien-1-one | 359.8 |
| 6771260 | C26H22ClN3O4 | (4R)-3-(3-chloro-4-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-5-(2-hydroxyethyl)-4-(3-phenoxyphenyl)-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | (4R)-3-(3-chloro-4-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-5-(2-hydroxyethyl)-4-(3-phenoxyphenyl)-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | 475.9 |
| 6771261 | C17H19N5O2S | 5-(4,5-dimethyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-N-(5-isopropyl-1,3,4-thiadiazol-2-yl)-1,2-dihydropyrazole-3-carboxamide | 5-(4,5-dimethyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-N-(5-isopropyl-1,3,4-thiadiazol-2-yl)-1,2-dihydropyrazole-3-carboxamide | 357.4 |
| 6771262 | C20H19N3O4 | N-(1,3-benzodioxol-5-ylmethyl)-5-(3,5-dimethyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-1,2-dihydropyrazole-3-carboxamide | N-(1,3-benzodioxol-5-ylmethyl)-5-(3,5-dimethyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-1,2-dihydropyrazole-3-carboxamide | 365.4 |
| 6771263 | C20H21N3O | 6-[4-[(3S)-3-methyl-1-piperidyl]-1H-quinazolin-2-ylidene]cyclohexa-2,4-dien-1-one | 6-[4-[(3S)-3-methyl-1-piperidyl]-1H-quinazolin-2-ylidene]cyclohexa-2,4-dien-1-one | 319.4 |
| 6771264 | C15H12N4O3S2 | N-[(3-methoxy-6-oxo-cyclohexa-2,4-dien-1-ylidene)carbamothioyl]-1,3-dihydro-2,1,3-benzothiadiazole-5-carboxamide | N-[(3-methoxy-6-oxo-cyclohexa-2,4-dien-1-ylidene)carbamothioyl]-1,3-dihydro-2,1,3-benzothiadiazole-5-carboxamide | 360.4 |
| 6771265 | C21H18Cl3N3O3 | (4R)-3-(3-chloro-4-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-4-(3,4-dichlorophenyl)-5-(3-hydroxypropyl)-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | (4R)-3-(3-chloro-4-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-4-(3,4-dichlorophenyl)-5-(3-hydroxypropyl)-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | 466.7 |
| 6771266 | C10H10ClN6O2+ | [amino-(4-amino-1,2,5-oxadiazol-3-yl)methylene]-[(3-chloro-6-oxo-cyclohexa-2,4-dien-1-ylidene)methylamino]ammonium | [amino-(4-amino-1,2,5-oxadiazol-3-yl)methylene]-[(3-chloro-6-oxo-cyclohexa-2,4-dien-1-ylidene)methylamino]ammonium | 281.68 |
| 6771267 | C10H9ClN6O2 | 4-amino-N'-[(3-chloro-6-oxo-cyclohexa-2,4-dien-1-ylidene)methylamino]-1,2,5-oxadiazole-3-carboxamidine | 4-amino-N'-[(3-chloro-6-oxo-cyclohexa-2,4-dien-1-ylidene)methylamino]-1,2,5-oxadiazole-3-carboxamidine | 280.67 |
| 6771268 | C17H17N4O2+ | 5-(3-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-N-(pyridin-1-ium-4-ylmethyl)-1,2-dihydropyrazole-3-carboxamide | 5-(3-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-N-(pyridin-1-ium-4-ylmethyl)-1,2-dihydropyrazole-3-carboxamide | 309.34 |
| 6771269 | C17H16N4O2 | 5-(3-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-N-(4-pyridylmethyl)-1,2-dihydropyrazole-3-carboxamide | 5-(3-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-N-(4-pyridylmethyl)-1,2-dihydropyrazole-3-carboxamide | 308.33 |
| 6771270 | C15H15N5O2S | 5-(4,5-dimethyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-N-(5-methyl-1,3,4-thiadiazol-2-yl)-1,2-dihydropyrazole-3-carboxamide | 5-(4,5-dimethyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-N-(5-methyl-1,3,4-thiadiazol-2-yl)-1,2-dihydropyrazole-3-carboxamide | 329.4 |
| 6771271 | C20H17BrClN3O3 | (4R)-4-(3-bromophenyl)-3-(3-chloro-4-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-5-(2-hydroxyethyl)-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | (4R)-4-(3-bromophenyl)-3-(3-chloro-4-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-5-(2-hydroxyethyl)-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | 462.7 |
| 6771272 | C21H20ClN3O3 | (4R)-4-(3-chlorophenyl)-5-(3-methoxypropyl)-3-(6-oxocyclohexa-2,4-dien-1-ylidene)-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | (4R)-4-(3-chlorophenyl)-5-(3-methoxypropyl)-3-(6-oxocyclohexa-2,4-dien-1-ylidene)-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | 397.9 |
| 6771273 | C23H18ClN3O2 | 6-(2-amino-5-phenyl-1H-pyrimidin-6-ylidene)-3-[(2-chlorophenyl)methoxy]cyclohexa-2,4-dien-1-one | 6-(2-amino-5-phenyl-1H-pyrimidin-6-ylidene)-3-[(2-chlorophenyl)methoxy]cyclohexa-2,4-dien-1-one | 403.9 |
| 6771274 | C14H24O3 | 4-allyl-5-hydroxy-2-methoxy-2,6,6-trimethyl-hept-4-en-3-one | 4-allyl-5-hydroxy-2-methoxy-2,6,6-trimethyl-hept-4-en-3-one | 240.34 |
| 6771275 | C14H13N5O2S | 5-(3-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-N-(5-methyl-1,3,4-thiadiazol-2-yl)-1,2-dihydropyrazole-3-carboxamide | 5-(3-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-N-(5-methyl-1,3,4-thiadiazol-2-yl)-1,2-dihydropyrazole-3-carboxamide | 315.35 |
| 6771276 | C22H22ClN3O5 | (4R)-3-(3-chloro-4-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-4-(4-hydroxy-3-methoxy-phenyl)-5-(3-hydroxypropyl)-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | (4R)-3-(3-chloro-4-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-4-(4-hydroxy-3-methoxy-phenyl)-5-(3-hydroxypropyl)-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | 443.9 |
| 6771277 | C30H31N3O5 | (4S)-3-(3,5-dimethyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-4-(3-ethoxy-4-hydroxy-phenyl)-5-[2-(4-methoxyphenyl)ethyl]-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | (4S)-3-(3,5-dimethyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-4-(3-ethoxy-4-hydroxy-phenyl)-5-[2-(4-methoxyphenyl)ethyl]-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | 513.6 |
| 6771278 | C18H17N3O2 | 3,5-dimethyl-N'-[(6-oxocyclohexa-2,4-dien-1-ylidene)methyl]-1H-indole-2-carbohydrazide | 3,5-dimethyl-N'-[(6-oxocyclohexa-2,4-dien-1-ylidene)methyl]-1H-indole-2-carbohydrazide | 307.3 |
| 6771279 | C25H22ClN3O3 | 6-[2-amino-5-(2-methoxyphenyl)-6-methyl-1H-pyrimidin-4-ylidene]-3-[(2-chlorophenyl)methoxy]cyclohexa-2,4-dien-1-one | 6-[2-amino-5-(2-methoxyphenyl)-6-methyl-1H-pyrimidin-4-ylidene]-3-[(2-chlorophenyl)methoxy]cyclohexa-2,4-dien-1-one | 447.9 |
| 6771280 | C21H17ClN5O2+ | 6-amino-1-(4-chlorophenyl)-4-(5-methoxy-6-oxo-cyclohexa-2,4-dien-1-ylidene)-3-methyl-2,7-dihydropyrazolo[3,4-b]pyridin-1-ium-5-carbonitrile | 6-amino-1-(4-chlorophenyl)-4-(5-methoxy-6-oxo-cyclohexa-2,4-dien-1-ylidene)-3-methyl-2,7-dihydropyrazolo[3,4-b]pyridin-1-ium-5-carbonitrile | 406.8 |
| 6771281 | C13H15N3O3 | (3S)-2-oxo-N'-[(6-oxocyclohexa-2,4-dien-1-ylidene)methyl]piperidine-3-carbohydrazide | (3S)-2-oxo-N'-[(6-oxocyclohexa-2,4-dien-1-ylidene)methyl]piperidine-3-carbohydrazide | 261.28 |
| 6771282 | C25H19BrF3N3O3 | 6-[2-amino-5-(2-methoxyphenyl)-6-(trifluoromethyl)-1H-pyrimidin-4-ylidene]-3-[(4-bromophenyl)methoxy]cyclohexa-2,4-dien-1-one | 6-[2-amino-5-(2-methoxyphenyl)-6-(trifluoromethyl)-1H-pyrimidin-4-ylidene]-3-[(4-bromophenyl)methoxy]cyclohexa-2,4-dien-1-one | 546.3 |
| 6771283 | C21H20N7O2S3+ | 5-amino-6-[[2-isopropyl-6-(4-methoxyphenyl)imidazo[2,1-b][1,3,4]thiadiazol-4-ium-5-ylidene]methyl]-2-methylsulfanyl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one | 5-amino-6-[[2-isopropyl-6-(4-methoxyphenyl)imidazo[2,1-b][1,3,4]thiadiazol-4-ium-5-ylidene]methyl]-2-methylsulfanyl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one | 498.6 |
| 6771284 | C21H20N7O2S3+ | 5-amino-6-[[2-isopropyl-6-(4-methoxyphenyl)imidazo[2,1-b][1,3,4]thiadiazol-4-ium-5-ylidene]methyl]-2-methylsulfanyl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one | 5-amino-6-[[2-isopropyl-6-(4-methoxyphenyl)imidazo[2,1-b][1,3,4]thiadiazol-4-ium-5-ylidene]methyl]-2-methylsulfanyl-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one | 498.6 |
| 6771285 | C20H18ClN3O3 | (4R)-3-(3-chloro-4-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-5-(2-hydroxyethyl)-4-phenyl-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | (4R)-3-(3-chloro-4-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-5-(2-hydroxyethyl)-4-phenyl-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | 383.8 |
| 6771286 | C27H26ClN4O4+ | (4S)-3-(3-chloro-4-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-4-(4-ethoxy-3-methoxy-phenyl)-5-(pyridin-1-ium-3-ylmethyl)-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | (4S)-3-(3-chloro-4-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-4-(4-ethoxy-3-methoxy-phenyl)-5-(pyridin-1-ium-3-ylmethyl)-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | 506.0 |
| 6771287 | C27H25ClN4O4 | (4S)-3-(3-chloro-4-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-4-(4-ethoxy-3-methoxy-phenyl)-5-(3-pyridylmethyl)-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | (4S)-3-(3-chloro-4-methyl-6-oxo-cyclohexa-2,4-dien-1-ylidene)-4-(4-ethoxy-3-methoxy-phenyl)-5-(3-pyridylmethyl)-2,4-dihydro-1H-pyrrolo[3,4-c]pyrazol-6-one | 505.0 |
| 6771288 | C17H10BrN3O2S | 4-amino-3-[(3-bromo-4-oxo-cyclohexa-2,5-dien-1-ylidene)methyl]pyrimido[2,1-b][1,3]benzothiazol-2-one | 4-amino-3-[(3-bromo-4-oxo-cyclohexa-2,5-dien-1-ylidene)methyl]pyrimido[2,1-b][1,3]benzothiazol-2-one | 400.3 |
| 6771289 | C17H10BrN3O2S | 4-amino-3-[(3-bromo-4-oxo-cyclohexa-2,5-dien-1-ylidene)methyl]pyrimido[2,1-b][1,3]benzothiazol-2-one | 4-amino-3-[(3-bromo-4-oxo-cyclohexa-2,5-dien-1-ylidene)methyl]pyrimido[2,1-b][1,3]benzothiazol-2-one | 400.3 |
Related Element Combinations
Explore other compound combinations that include similar elements. Discover more chemistry by browsing related searches.
H
O
H + O
C
H
C + H
N
H
N + H
C
H
O
C + H + O
C
N
C + N
Na
Cl
Na + Cl
Fe
O
Fe + O
Ca
O
Ca + O
P
O
P + O
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.