CAS RN: 73771-04-7
CAS Name: propanoic acid [2-[(8S,9S,10R,11S,13S,14S,17R)-17-ethoxycarbonyloxy-11-hydroxy-10,13-dimethyl-3-oxo-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-17-yl]-2-oxoethyl] ester
OPENEYE Name: [2-[(8S,9S,10R,11S,13S,14S,17R)-17-ethoxycarbonyloxy-11-hydroxy-10,13-dimethyl-3-oxo-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-17-yl]-2-oxo-ethyl] propanoate
IUPAC Name: [2-[(8S,9S,10R,11S,13S,14S,17R)-17-ethoxycarbonyloxy-11-hydroxy-10,13-dimethyl-3-oxo-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-17-yl]-2-oxoethyl] propanoate
SYSTEMATIC NAME: [2-[(8S,9S,10R,11S,13S,14S,17R)-17-ethoxycarbonyloxy-10,13-dimethyl-11-oxidanyl-3-oxidanylidene-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthren-17-yl]-2-oxidanylidene-ethyl] propanoate
MOLECULAR FORMULA: C27H36O8
MOLECULAR WEIGHT: 488.56994
SMILES: CCC(=O)OCC(=O)[C@]1(CC[C@@H]2[C@@]1(C[C@@H]([C@H]3[C@H]2CCC4=CC(=O)C=C[C@]34C)O)C)OC(=O)OCC
Structure:
CAS RN: 84226-12-0
CAS Name: 5-chloro-3-ethyl-N-[(1-ethyl-2-pyrrolidinyl)methyl]-2-hydroxy-6-methoxybenzamide
OPENEYE Name: 5-chloro-3-ethyl-N-[(1-ethylpyrrolidin-2-yl)methyl]-2-hydroxy-6-methoxy-benzamide
IUPAC Name: 5-chloro-3-ethyl-N-[(1-ethylpyrrolidin-2-yl)methyl]-2-hydroxy-6-methoxybenzamide
SYSTEMATIC NAME: 3-chloranyl-5-ethyl-N-[(1-ethylpyrrolidin-2-yl)methyl]-2-methoxy-6-oxidanyl-benzamide
MOLECULAR FORMULA: C17H25ClN2O3
MOLECULAR WEIGHT: 340.845
SMILES: CCC1=CC(=C(C(=C1O)C(=O)NCC2CCCN2CC)OC)Cl
Structure:
CAS RN: 564-25-0
CAS Name: (2Z,4S,4aR,5S,5aR,6R)-2-[amino(hydroxy)methylidene]-4-(dimethylamino)-5,10,11,12a-tetrahydroxy-6-methyl-4a,5,5a,6-tetrahydro-4H-tetracene-1,3,12-trione
OPENEYE Name: (2Z,4S,4aR,5S,5aR,6R)-2-[amino(hydroxy)methylene]-4-(dimethylamino)-5,10,11,12a-tetrahydroxy-6-methyl-4a,5,5a,6-tetrahydro-4H-tetracene-1,3,12-trione
IUPAC Name: (2Z,4S,4aR,5S,5aR,6R)-2-[amino(hydroxy)methylidene]-4-(dimethylamino)-5,10,11,12a-tetrahydroxy-6-methyl-4a,5,5a,6-tetrahydro-4H-tetracene-1,3,12-trione
SYSTEMATIC NAME: (2Z,4S,4aR,5S,5aR,6R)-2-[azanyl(oxidanyl)methylidene]-4-(dimethylamino)-6-methyl-5,10,11,12a-tetrakis(oxidanyl)-4a,5,5a,6-tetrahydro-4H-tetracene-1,3,12-trione
MOLECULAR FORMULA: C22H24N2O8
MOLECULAR WEIGHT: 444.43456
SMILES: C[C@@H]1[C@H]2[C@@H]([C@H]3[C@@H](C(=O)/C(=C(\N)/O)/C(=O)C3(C(=O)C2=C(C4=C1C=CC=C4O)O)O)N(C)C)O
Structure:
CAS RN: 5008-52-6
CAS Name:
OPENEYE Name:
IUPAC Name:
SYSTEMATIC NAME:
MOLECULAR FORMULA: C22H33NO3
MOLECULAR WEIGHT: 359.50232
SMILES: CCN1C[C@@]2(CC[C@@H](C34[C@H]1C(CC23)[C@]56C4C[C@@H](C(C5)C(=C)[C@H]6O)O)O)C
Structure:
CAS RN: 509-15-9
CAS Name:
OPENEYE Name:
IUPAC Name:
SYSTEMATIC NAME:
MOLECULAR FORMULA: C20H22N2O2
MOLECULAR WEIGHT: 322.40088
SMILES: CN1C[C@@]2([C@@H]3C1C4C2CC([C@@]35C6=CC=CC=C6NC5=O)OC4)C=C
Structure:
CAS RN: 10597-89-4
CAS Name: (2R)-2-[[(2S,4S,5S)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)-4-oxanyl]oxy]propanoic acid
OPENEYE Name: (2R)-2-[(2S,4S,5S)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)tetrahydropyran-4-yl]oxypropanoic acid
IUPAC Name: (2R)-2-[(2S,4S,5S)-3-acetamido-2,5-dihydroxy-6-(hydroxymethyl)oxan-4-yl]oxypropanoic acid
SYSTEMATIC NAME: (2R)-2-[(3S,4S,6S)-5-acetamido-2-(hydroxymethyl)-3,6-bis(oxidanyl)oxan-4-yl]oxypropanoic acid
MOLECULAR FORMULA: C11H19NO8
MOLECULAR WEIGHT: 293.27046
SMILES: C[C@H](C(=O)O)O[C@@H]1[C@@H](C(O[C@@H](C1NC(=O)C)O)CO)O
Structure:
CAS RN: 31112-62-6
CAS Name: 3-acetamido-5-[acetyl(methyl)amino]-2,4,6-triiodo-N-[(2R,4S,5S)-2,4,5-trihydroxy-6-(hydroxymethyl)-3-oxanyl]benzamide
OPENEYE Name: 3-acetamido-5-[acetyl(methyl)amino]-2,4,6-triiodo-N-[(2R,4S,5S)-2,4,5-trihydroxy-6-(hydroxymethyl)tetrahydropyran-3-yl]benzamide
IUPAC Name: 3-acetamido-5-[acetyl(methyl)amino]-2,4,6-triiodo-N-[(2R,4S,5S)-2,4,5-trihydroxy-6-(hydroxymethyl)oxan-3-yl]benzamide
SYSTEMATIC NAME: 3-acetamido-5-[ethanoyl(methyl)amino]-N-[(2R,4S,5S)-6-(hydroxymethyl)-2,4,5-tris(oxidanyl)oxan-3-yl]-2,4,6-tris(iodanyl)benzamide
MOLECULAR FORMULA: C18H22I3N3O8
MOLECULAR WEIGHT: 789.09599
SMILES: CC(=O)NC1=C(C(=C(C(=C1I)C(=O)NC2[C@@H]([C@@H](C(O[C@H]2O)CO)O)O)I)N(C)C(=O)C)I
Structure:
CAS RN: 26155-31-7
CAS Name: 2,3-dihydroxybutanedioic acid; 1-methyl-2-[2-(3-methyl-2-thiophenyl)ethenyl]-5,6-dihydro-4H-pyrimidine
OPENEYE Name: 2,3-dihydroxybutanedioic acid; 1-methyl-2-[2-(3-methyl-2-thienyl)vinyl]-5,6-dihydro-4H-pyrimidine
IUPAC Name: 2,3-dihydroxybutanedioic acid; 1-methyl-2-[2-(3-methylthiophen-2-yl)ethenyl]-5,6-dihydro-4H-pyrimidine
SYSTEMATIC NAME: 2,3-bis(oxidanyl)butanedioic acid; 1-methyl-2-[2-(3-methylthiophen-2-yl)ethenyl]-5,6-dihydro-4H-pyrimidine
MOLECULAR FORMULA: C16H22N2O6S
MOLECULAR WEIGHT: 370.42068
SMILES: CC1=C(SC=C1)C=CC2=NCCCN2C.C(C(C(=O)O)O)(C(=O)O)O
Structure:
CAS RN: 36137-88-9
CAS Name: (5E)-5-(dimethylaminohydrazinylidene)-4-imidazolecarboxylic acid ethyl ester
OPENEYE Name: ethyl (5E)-5-(dimethylaminohydrazono)imidazole-4-carboxylate
IUPAC Name: ethyl (5E)-5-(dimethylaminohydrazinylidene)imidazole-4-carboxylate
SYSTEMATIC NAME: ethyl (5E)-5-(dimethylaminohydrazinylidene)imidazole-4-carboxylate
MOLECULAR FORMULA: C8H13N5O2
MOLECULAR WEIGHT: 211.22112
SMILES: CCOC(=O)C\1=NC=N/C1=N/NN(C)C
Structure:
CAS RN: 28199-56-6
CAS Name: 1-hydroxy-6-methylpurine
OPENEYE Name: 1-hydroxy-6-methyl-purine
IUPAC Name: 1-hydroxy-6-methylpurine
SYSTEMATIC NAME: 6-methyl-1-oxidanyl-purine
MOLECULAR FORMULA: C6H6N4O
MOLECULAR WEIGHT: 150.13804
SMILES: CC1=C2C(=NC=N2)N=CN1O
Structure:
CAS RN: 19903-73-2
CAS Name:
OPENEYE Name:
IUPAC Name:
SYSTEMATIC NAME:
MOLECULAR FORMULA: C15H26O
MOLECULAR WEIGHT: 222.36634
SMILES: C[C@@H]1CC[C@@H]2[C@]13CC[C@]([C@H](C3)C2(C)C)(C)O
Structure:
CAS RN: 532-31-0
CAS Name: benzoic acid; silver
OPENEYE Name: benzoic acid; silver
IUPAC Name: benzoic acid; silver
SYSTEMATIC NAME: benzoic acid; silver
MOLECULAR FORMULA: C7H6AgO2
MOLECULAR WEIGHT: 229.98954
SMILES: C1=CC=C(C=C1)C(=O)O.[Ag]
Structure:
CAS RN: 6870-67-3
CAS Name:
OPENEYE Name:
IUPAC Name:
SYSTEMATIC NAME:
MOLECULAR FORMULA: C18H25NO6
MOLECULAR WEIGHT: 351.3942
SMILES: C[C@@H]1C[C@]2([C@H](O2)C)C(=O)O[C@@H]3CCN4[C@@H]3C(=CC4)COC(=O)[C@]1(C)O
Structure:
CAS RN: 91973-99-8
CAS Name: 2-hydroxyimino-3-(4-quinolinyl)propanoic acid
OPENEYE Name: 2-hydroxyimino-3-(4-quinolyl)propanoic acid
IUPAC Name: 2-hydroxyimino-3-quinolin-4-ylpropanoic acid
SYSTEMATIC NAME: 2-hydroxyimino-3-quinolin-4-yl-propanoic acid
MOLECULAR FORMULA: C12H10N2O3
MOLECULAR WEIGHT: 230.2194
SMILES: C1=CC=C2C(=C1)C(=CC=N2)CC(=NO)C(=O)O
Structure:
CAS RN: 220913-32-6
CAS Name:
OPENEYE Name:
IUPAC Name:
SYSTEMATIC NAME:
MOLECULAR FORMULA: C26H30N2O5Si
MOLECULAR WEIGHT: 478.6123
SMILES: CC[C@@]1(C2=C(COC1=O)C(=O)N3CC4=C(C5=C(C=CC(=C5)O)N=C4C3=C2)[Si](C)(C)C(C)(C)C)O
Structure:
CAS RN: 54934-75-7
CAS Name:
OPENEYE Name:
IUPAC Name:
SYSTEMATIC NAME:
MOLECULAR FORMULA: C17H21NO4
MOLECULAR WEIGHT: 303.35294
SMILES: CN1CC[C@]23[C@@H]4C(CC[C@]2([C@H]1CC5=C3C(=C(C=C5)O)O4)O)O
Structure:
CAS RN: 138560-04-0
CAS Name: (4R)-4-[(1S)-3,3-diethoxy-1-hydroxypropyl]-1,3-oxathiolane-2-thione
OPENEYE Name: (4R)-4-[(1S)-3,3-diethoxy-1-hydroxy-propyl]-1,3-oxathiolane-2-thione
IUPAC Name: (4R)-4-[(1S)-3,3-diethoxy-1-hydroxypropyl]-1,3-oxathiolane-2-thione
SYSTEMATIC NAME: (4R)-4-[(1S)-3,3-diethoxy-1-oxidanyl-propyl]-1,3-oxathiolane-2-thione
MOLECULAR FORMULA: C10H18O4S2
MOLECULAR WEIGHT: 266.37752
SMILES: CCOC(C[C@@H]([C@H]1COC(=S)S1)O)OCC
Structure:
CAS RN: 96617-23-1
CAS Name: 2-[[(1S,2S)-2-hydroxy-2-(1-phenylethenyl)cyclobutyl]-(phenylmethyl)amino]acetonitrile
OPENEYE Name: 2-[benzyl-[(1S,2S)-2-hydroxy-2-(1-phenylvinyl)cyclobutyl]amino]acetonitrile
IUPAC Name: 2-[benzyl-[(1S,2S)-2-hydroxy-2-(1-phenylethenyl)cyclobutyl]amino]acetonitrile
SYSTEMATIC NAME: 2-[[(1S,2S)-2-oxidanyl-2-(1-phenylethenyl)cyclobutyl]-(phenylmethyl)amino]ethanenitrile
MOLECULAR FORMULA: C21H22N2O
MOLECULAR WEIGHT: 318.41218
SMILES: C=C(C1=CC=CC=C1)[C@]2(CC[C@@H]2N(CC#N)CC3=CC=CC=C3)O
Structure:
CAS RN: 112088-56-9
CAS Name:
OPENEYE Name:
IUPAC Name:
SYSTEMATIC NAME:
MOLECULAR FORMULA: C54H74N2O10
MOLECULAR WEIGHT: 911.17276
SMILES: CC1[C@@H]2CC=C3[C@@]2(CO[C@@]14C(CC(O4)(C)C)O)C(=O)CC5[C@@H]3CCC6[C@]5(CC7=C(C6)N=C8C[C@@]9(C(CC[C@H]1C9C[C@@H]([C@@]2(C1=C[C@@H]1[C@]2(C([C@]2(O1)[C@H](C[C@](O2)(C)CO)O)C)O)C)O)CC8=N7)C)C
Structure:
CAS RN: 77327-05-0
CAS Name: N-[1-[[(12R,13S)-13-[(2R)-butan-2-yl]-12-hydroxy-20-[(4-methoxyphenyl)methyl]-6,17,21-trimethyl-3-(2-methylpropyl)-2,5,7,10,15,19,22-heptaoxo-8-propan-2-yl-9,18-dioxa-1,4,14,21-tetrazabicyclo[21.3.0]hexacosan-16-yl]amino]-4-methyl-1-oxopentan-2-yl]-1-(2-h
OPENEYE Name: N-[1-[[(12R,13S)-12-hydroxy-3-isobutyl-8-isopropyl-20-[(4-methoxyphenyl)methyl]-6,17,21-trimethyl-13-[(1R)-1-methylpropyl]-2,5,7,10,15,19,22-heptaoxo-9,18-dioxa-1,4,14,21-tetrazabicyclo[21.3.0]hexacosan-16-yl]carbamoyl]-3-methyl-butyl]-1-(2-hydroxypropano
IUPAC Name: N-[1-[[(12R,13S)-13-[(2R)-butan-2-yl]-12-hydroxy-20-[(4-methoxyphenyl)methyl]-6,17,21-trimethyl-3-(2-methylpropyl)-2,5,7,10,15,19,22-heptaoxo-8-propan-2-yl-9,18-dioxa-1,4,14,21-tetrazabicyclo[21.3.0]hexacosan-16-yl]amino]-4-methyl-1-oxopentan-2-yl]-1-(2-h
SYSTEMATIC NAME: N-[1-[[(12R,13S)-13-[(2R)-butan-2-yl]-20-[(4-methoxyphenyl)methyl]-6,17,21-trimethyl-3-(2-methylpropyl)-12-oxidanyl-2,5,7,10,15,19,22-heptakis(oxidanylidene)-8-propan-2-yl-9,18-dioxa-1,4,14,21-tetrazabicyclo[21.3.0]hexacosan-16-yl]amino]-4-methyl-1-oxidan
MOLECULAR FORMULA: C57H89N7O15
MOLECULAR WEIGHT: 1112.35446
SMILES: CC[C@@H](C)[C@H]1[C@@H](CC(=O)OC(C(=O)C(C(=O)NC(C(=O)N2CCCC2C(=O)N(C(C(=O)OC(C(C(=O)N1)NC(=O)C(CC(C)C)N(C)C(=O)C3CCCN3C(=O)C(C)O)C)CC4=CC=C(C=C4)OC)C)CC(C)C)C)C(C)C)O
Structure:
CAS RN: 77121-90-5
CAS Name: (7S,9S)-7-[(4-amino-5-methoxy-6-methyl-2-oxanyl)oxy]-6,9,11-trihydroxy-9-(2-hydroxy-1-oxoethyl)-4-methoxy-8,10-dihydro-7H-tetracene-5,12-dione
OPENEYE Name: (7S,9S)-7-(4-amino-5-methoxy-6-methyl-tetrahydropyran-2-yl)oxy-6,9,11-trihydroxy-9-(2-hydroxyacetyl)-4-methoxy-8,10-dihydro-7H-tetracene-5,12-dione
IUPAC Name: (7S,9S)-7-(4-amino-5-methoxy-6-methyloxan-2-yl)oxy-6,9,11-trihydroxy-9-(2-hydroxyacetyl)-4-methoxy-8,10-dihydro-7H-tetracene-5,12-dione
SYSTEMATIC NAME: (7S,9S)-7-(4-azanyl-5-methoxy-6-methyl-oxan-2-yl)oxy-4-methoxy-6,9,11-tris(oxidanyl)-9-(2-oxidanylethanoyl)-8,10-dihydro-7H-tetracene-5,12-dione
MOLECULAR FORMULA: C28H31NO11
MOLECULAR WEIGHT: 557.54584
SMILES: CC1C(C(CC(O1)O[C@H]2C[C@@](CC3=C(C4=C(C(=C23)O)C(=O)C5=C(C4=O)C=CC=C5OC)O)(C(=O)CO)O)N)OC
Structure:
CAS RN: 5456-47-3
CAS Name: 2-hydroxyimino-3-(4-nitrophenyl)propanoic acid
OPENEYE Name: 2-hydroxyimino-3-(4-nitrophenyl)propanoic acid
IUPAC Name: 2-hydroxyimino-3-(4-nitrophenyl)propanoic acid
SYSTEMATIC NAME: 2-hydroxyimino-3-(4-nitrophenyl)propanoic acid
MOLECULAR FORMULA: C9H8N2O5
MOLECULAR WEIGHT: 224.17022
SMILES: C1=CC(=CC=C1CC(=NO)C(=O)O)[N+](=O)[O-]
Structure:
CAS RN: 2299-26-5
CAS Name:
OPENEYE Name:
IUPAC Name:
SYSTEMATIC NAME:
MOLECULAR FORMULA: C21H26N2O3
MOLECULAR WEIGHT: 354.44274
SMILES: CC[C@H]1CN([C@H]2CC3=C(C(=O)C[C@H]1C2C(=O)OC)NC4=CC=CC=C34)C
Structure:
CAS RN: 32515-28-9
CAS Name: 4-(diethylamino)-1,1-diethyl-5-oxo-1,2,4-triazol-1-ium-3-olate
OPENEYE Name: 4-(diethylamino)-1,1-diethyl-5-oxo-1,2,4-triazol-1-ium-3-olate
IUPAC Name: 4-(diethylamino)-1,1-diethyl-5-oxo-1,2,4-triazol-1-ium-3-olate
SYSTEMATIC NAME: 4-(diethylamino)-1,1-diethyl-5-oxidanylidene-1,2,4-triazol-1-ium-3-olate
MOLECULAR FORMULA: C10H20N4O2
MOLECULAR WEIGHT: 228.2914
SMILES: CCN(CC)N1C(=N[N+](C1=O)(CC)CC)[O-]
Structure:
CAS RN: 27117-02-8
CAS Name: (4E)-4-(dimethylaminohydrazinylidene)-3-methyl-5-(trifluoromethyl)pyrazole
OPENEYE Name: (4E)-4-(dimethylaminohydrazono)-3-methyl-5-(trifluoromethyl)pyrazole
IUPAC Name: (4E)-4-(dimethylaminohydrazinylidene)-3-methyl-5-(trifluoromethyl)pyrazole
SYSTEMATIC NAME: (4E)-4-(dimethylaminohydrazinylidene)-3-methyl-5-(trifluoromethyl)pyrazole
MOLECULAR FORMULA: C7H10F3N5
MOLECULAR WEIGHT: 221.18301
SMILES: CC\1=NN=C(/C1=N/NN(C)C)C(F)(F)F
Structure:
CAS RN: 125-65-5
CAS Name:
OPENEYE Name:
IUPAC Name:
SYSTEMATIC NAME:
MOLECULAR FORMULA: C22H34O5
MOLECULAR WEIGHT: 378.50236
SMILES: C[C@@H]1CC[C@@]23CCC(=O)[C@H]2[C@]1([C@@H](C[C@@]([C@H]([C@@H]3C)O)(C)C=C)OC(=O)CO)C
Structure:
CAS RN: 171095-12-8
CAS Name: (2S)-2-acetamido-3-(4-bromophenyl)propanoic acid
OPENEYE Name: (2S)-2-acetamido-3-(4-bromophenyl)propanoic acid
IUPAC Name: (2S)-2-acetamido-3-(4-bromophenyl)propanoic acid
SYSTEMATIC NAME: (2S)-2-acetamido-3-(4-bromophenyl)propanoic acid
MOLECULAR FORMULA: C11H12BrNO3
MOLECULAR WEIGHT: 286.12188
SMILES: CC(=O)N[C@@H](CC1=CC=C(C=C1)Br)C(=O)O
Structure:
CAS RN: 897-06-3
CAS Name: (10R,13S)-10,13-dimethyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-dione
OPENEYE Name: (10R,13S)-10,13-dimethyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-dione
IUPAC Name: (10R,13S)-10,13-dimethyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-dione
SYSTEMATIC NAME: (10R,13S)-10,13-dimethyl-7,8,9,11,12,14,15,16-octahydro-6H-cyclopenta[a]phenanthrene-3,17-dione
MOLECULAR FORMULA: C19H24O2
MOLECULAR WEIGHT: 284.39266
SMILES: C[C@]12CCC3C(C1CCC2=O)CCC4=CC(=O)C=C[C@]34C
Structure:
CAS RN: 57993-25-6
CAS Name: (2S)-3-(4-hydroxyphenyl)-2-(1-oxooctadecylamino)propanoic acid
OPENEYE Name: (2S)-3-(4-hydroxyphenyl)-2-(octadecanoylamino)propanoic acid
IUPAC Name: (2S)-3-(4-hydroxyphenyl)-2-(octadecanoylamino)propanoic acid
SYSTEMATIC NAME: (2S)-3-(4-hydroxyphenyl)-2-(octadecanoylamino)propanoic acid
MOLECULAR FORMULA: C27H45NO4
MOLECULAR WEIGHT: 447.6505
SMILES: CCCCCCCCCCCCCCCCCC(=O)N[C@@H](CC1=CC=C(C=C1)O)C(=O)O
Structure:
CAS RN: 355121-52-7
CAS Name: 4-bromo-3,5-bis(prop-2-enoxy)benzaldehyde
OPENEYE Name: 3,5-diallyloxy-4-bromo-benzaldehyde
IUPAC Name: 4-bromo-3,5-bis(prop-2-enoxy)benzaldehyde
SYSTEMATIC NAME: 4-bromanyl-3,5-bis(prop-2-enoxy)benzaldehyde
MOLECULAR FORMULA: C13H13BrO3
MOLECULAR WEIGHT: 297.14452
SMILES: C=CCOC1=CC(=CC(=C1Br)OCC=C)C=O
Structure:
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