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中文名称 英文名称 CAS号 化学式 结构式图片
—— 8,9,9-trimethyl-5,6,7,8-tetrahydro-5,8-methano-chromen-2-one 681465-08-7 C13H16O2
8,9,9-trimethyl-5,6,7,8-tetrahydro-5,8-methano-chromen-2-one
—— 8-amino-1,3-dimethyl-7-(3-methylbutyl)-2,3,6,7-tetrahydro-1H-purine-2,6-dione —— C12H19N5O2
8-amino-1,3-dimethyl-7-(3-methylbutyl)-2,3,6,7-tetrahydro-1H-purine-2,6-dione
—— 8-[5-(3,5-dimethoxyphenyl)-4,5-dihydro-1H-pyrazol-3-yl]-9-hydroxy-7-methyl-2,3-dihydrocyclopenta[c]chromen-4(1H)-one —— C24H24N2O5
8-[5-(3,5-dimethoxyphenyl)-4,5-dihydro-1H-pyrazol-3-yl]-9-hydroxy-7-methyl-2,3-dihydrocyclopenta[c]chromen-4(1H)-one
—— [8-Hydroxy-1-methyl-7-(1-methyl-5,8,12-trioxo-14-oxapentacyclo[11.6.1.02,11.04,9.016,20]icosa-2(11),3,6,9,13(20),15-hexaen-7-yl)-12-oxo-14-oxapentacyclo[11.6.1.02,11.04,9.016,20]icosa-2(11),3,5,7,9,13(20),15-heptaen-5-yl] hydrogen sulfate —— C40H28O11S
[8-Hydroxy-1-methyl-7-(1-methyl-5,8,12-trioxo-14-oxapentacyclo[11.6.1.02,11.04,9.016,20]icosa-2(11),3,6,9,13(20),15-hexaen-7-yl)-12-oxo-14-oxapentacyclo[11.6.1.02,11.04,9.016,20]icosa-2(11),3,5,7,9,13(20),15-heptaen-5-yl] hydrogen sulfate
—— 8-ethyl-1,1,7-trimethyl-9-oxo-3,4,10,10a-tetrahydro-2H-phenanthrene-4a-carbaldehyde —— C20H26O2
8-ethyl-1,1,7-trimethyl-9-oxo-3,4,10,10a-tetrahydro-2H-phenanthrene-4a-carbaldehyde
—— [8-Hydroxy-8a-(hydroxymethyl)-4,4,6a,6b,11,11,14b-heptamethyl-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicen-3-yl] hexadecanoate —— C46H80O4
[8-Hydroxy-8a-(hydroxymethyl)-4,4,6a,6b,11,11,14b-heptamethyl-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicen-3-yl] hexadecanoate
—— 8-[4-[3-[2-(3-Aminophenyl)cyclopentyl]-3-methyloxiran-2-yl]-4-hydroxybutan-2-yl]-18-hydroxy-1-(3-hydroxyphenyl)-13,18,23,25-tetramethyl-16-azahexacyclo[21.3.1.05,9.05,13.012,25.015,24]heptacos-8-ene-7,27-dione —— C54H74N2O6
8-[4-[3-[2-(3-Aminophenyl)cyclopentyl]-3-methyloxiran-2-yl]-4-hydroxybutan-2-yl]-18-hydroxy-1-(3-hydroxyphenyl)-13,18,23,25-tetramethyl-16-azahexacyclo[21.3.1.05,9.05,13.012,25.015,24]heptacos-8-ene-7,27-dione
—— 8'-[6-[3-(2-aminoethyl)cyclopent-2-en-1-yl]hexyl]-4'-(hydroxymethyl)-9'-(4-hydroxyphenyl)spiro[2,4,4a,9a-tetrahydro-1H-anthracene-3,2'-bicyclo[9.3.1]pentadeca-1(14),5,11(15),12-tetraene]-3'-carboxylic acid —— C49H61NO4
8'-[6-[3-(2-aminoethyl)cyclopent-2-en-1-yl]hexyl]-4'-(hydroxymethyl)-9'-(4-hydroxyphenyl)spiro[2,4,4a,9a-tetrahydro-1H-anthracene-3,2'-bicyclo[9.3.1]pentadeca-1(14),5,11(15),12-tetraene]-3'-carboxylic acid
—— 8-(2,3-Dihydro-1,4-benzodioxin-6-yl)-2-(pyridin-3-ylmethylidene)-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C24H18N2O5
8-(2,3-Dihydro-1,4-benzodioxin-6-yl)-2-(pyridin-3-ylmethylidene)-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (8-Ethoxy-11-ethyl-4,6,16-trimethoxy-11-azahexacyclo[7.7.2.12,5.01,10.03,8.013,17]nonadecan-13-yl)methyl 2-aminobenzoate —— C33H48N2O6
(8-Ethoxy-11-ethyl-4,6,16-trimethoxy-11-azahexacyclo[7.7.2.12,5.01,10.03,8.013,17]nonadecan-13-yl)methyl 2-aminobenzoate
—— 8-Diethylaminomethyl-6-ethyl-7-hydroxy-2-methyl-3-(1-methyl-1H-benzoimidazol-2-yl)-chromen-4-one —— C25H29N3O3
8-Diethylaminomethyl-6-ethyl-7-hydroxy-2-methyl-3-(1-methyl-1H-benzoimidazol-2-yl)-chromen-4-one
—— 8,11-Dihydroxy-2,6,9-trimethyltricyclo[5.4.0.02,9]undecane-6-carboxylic acid —— C15H24O4
8,11-Dihydroxy-2,6,9-trimethyltricyclo[5.4.0.02,9]undecane-6-carboxylic acid
—— 8-(4-Hydroxy-1-methoxybutan-2-yl)-7-(hydroxymethyl)-46-(1-hydroxypropan-2-ylidene)-1-methyl-19-[3-(1-phenylcyclohexyl)phenyl]-2,10,14,44-tetraoxadecacyclo[24.16.6.123,27.03,12.06,11.013,43.017,22.030,42.031,40.034,39]nonatetraconta-3(12),4,6(11),7,20,23(49),24,26,32,34,36,38-dodecaene-9,15,45-trione —— C73H78O11
8-(4-Hydroxy-1-methoxybutan-2-yl)-7-(hydroxymethyl)-46-(1-hydroxypropan-2-ylidene)-1-methyl-19-[3-(1-phenylcyclohexyl)phenyl]-2,10,14,44-tetraoxadecacyclo[24.16.6.123,27.03,12.06,11.013,43.017,22.030,42.031,40.034,39]nonatetraconta-3(12),4,6(11),7,20,23(49),24,26,32,34,36,38-dodecaene-9,15,45-trione
—— (8-Hydroxy-5,13-dimethyl-9,18-dimethylidene-17-oxo-4,16-dioxatricyclo[13.3.0.03,5]octadecan-14-yl) acetate —— C22H32O6
(8-Hydroxy-5,13-dimethyl-9,18-dimethylidene-17-oxo-4,16-dioxatricyclo[13.3.0.03,5]octadecan-14-yl) acetate
—— 8-Hydroxy-2-methyl-8-(4-methylidene-5-oxooxolan-3-yl)octa-2,6-dienal —— C14H18O4
8-Hydroxy-2-methyl-8-(4-methylidene-5-oxooxolan-3-yl)octa-2,6-dienal
—— (8-Methyl-2-oxopyrano[2,3-f]chromen-8-yl)methyl 3-methylbutanoate —— C19H20O5
(8-Methyl-2-oxopyrano[2,3-f]chromen-8-yl)methyl 3-methylbutanoate
—— 8a-[4-[3,4-Dihydroxy-4-(hydroxymethyl)oxolan-2-yl]oxy-3-[3,4-dihydroxy-6-methyl-5-(3,4,5-trihydroxyoxan-2-yl)oxyoxan-2-yl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-2-yl]oxycarbonyl-2-hydroxy-4,6a,6b,11,11,14b-hexamethyl-3-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicene-4-carboxylic acid —— C58H92O28
8a-[4-[3,4-Dihydroxy-4-(hydroxymethyl)oxolan-2-yl]oxy-3-[3,4-dihydroxy-6-methyl-5-(3,4,5-trihydroxyoxan-2-yl)oxyoxan-2-yl]oxy-5-hydroxy-6-(hydroxymethyl)oxan-2-yl]oxycarbonyl-2-hydroxy-4,6a,6b,11,11,14b-hexamethyl-3-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicene-4-carboxylic acid
—— [8-Acetyloxy-1-[(4-benzoylpiperazin-1-yl)methyl]-9-hydroxy-5,8a-dimethyl-2-oxo-1,3a,4,5,5a,6,7,8,9,9a-decahydroazuleno[6,5-b]furan-6-yl] acetate —— C30H40N2O8
[8-Acetyloxy-1-[(4-benzoylpiperazin-1-yl)methyl]-9-hydroxy-5,8a-dimethyl-2-oxo-1,3a,4,5,5a,6,7,8,9,9a-decahydroazuleno[6,5-b]furan-6-yl] acetate
—— 8-Ethyl-13,15,19-trimethoxy-5-oxa-8-azaheptacyclo[8.7.2.114,17.01,9.04,6.06,18.011,16]icosane-2,10,11-triol —— C23H35NO7
8-Ethyl-13,15,19-trimethoxy-5-oxa-8-azaheptacyclo[8.7.2.114,17.01,9.04,6.06,18.011,16]icosane-2,10,11-triol
—— (8-Hydroxy-6,10-dimethyl-3-methylidene-2-oxo-3a,4,5,8,9,11a-hexahydrocyclodeca[b]furan-4-yl) 2-methylpropanoate —— C19H26O5
(8-Hydroxy-6,10-dimethyl-3-methylidene-2-oxo-3a,4,5,8,9,11a-hexahydrocyclodeca[b]furan-4-yl) 2-methylpropanoate
—— [8,14,17-Trihydroxy-17-(1-hydroxyethyl)-3-[5-[5-[5-[3-hydroxy-4-methoxy-6-methyl-5-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-4-methoxy-6-methyloxan-2-yl]oxy-4-methoxy-6-methyloxan-2-yl]oxy-4-methoxy-6-methyloxan-2-yl]oxy-10,13-dimethyl-1,2,3,4,7,9,11,12,15,16-decahydrocyclopenta[a]phenanthren-12-yl] acetate —— C57H94O25
[8,14,17-Trihydroxy-17-(1-hydroxyethyl)-3-[5-[5-[5-[3-hydroxy-4-methoxy-6-methyl-5-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-4-methoxy-6-methyloxan-2-yl]oxy-4-methoxy-6-methyloxan-2-yl]oxy-4-methoxy-6-methyloxan-2-yl]oxy-10,13-dimethyl-1,2,3,4,7,9,11,12,15,16-decahydrocyclopenta[a]phenanthren-12-yl] acetate
—— 8-acetyl-10-(4-isopropoxy-3-methoxyphenyl)-2-isopropyl-6,7,8,10-tetrahydropyrrolo[3',4':6,7]azepino[4,3,2-cd]indol-9(2H)-one —— C28H31N3O4
8-acetyl-10-(4-isopropoxy-3-methoxyphenyl)-2-isopropyl-6,7,8,10-tetrahydropyrrolo[3',4':6,7]azepino[4,3,2-cd]indol-9(2H)-one
—— 8-hydroxy-5-isopropyl-8-methyl-non-6-en-2-one 55023-59-1 C13H24O2
8-hydroxy-5-isopropyl-8-methyl-non-6-en-2-one
—— 8-[2-(2,3-Dihydroxy-3-methylbutanoyl)oxy-3-methylpentanoyl]oxy-8-(2-methyloxiran-2-yl)octa-2,4,6-trienoic acid —— C22H32O9
8-[2-(2,3-Dihydroxy-3-methylbutanoyl)oxy-3-methylpentanoyl]oxy-8-(2-methyloxiran-2-yl)octa-2,4,6-trienoic acid
—— 8-[3-(Dimethylamino)prop-2-enoyl]-5,7-dihydroxy-1-(4-methoxyphenyl)-3,4a,6-trimethyl-[1]benzofuro[3,2-f]indazol-4-one —— C28H27N3O6
8-[3-(Dimethylamino)prop-2-enoyl]-5,7-dihydroxy-1-(4-methoxyphenyl)-3,4a,6-trimethyl-[1]benzofuro[3,2-f]indazol-4-one
—— 8-(2H-1,3-Benzodioxol-5-yl)-1-methyl-2,6-diazabicyclo[2.2.2]octane-3,5-dione —— C14H14N2O4
8-(2H-1,3-Benzodioxol-5-yl)-1-methyl-2,6-diazabicyclo[2.2.2]octane-3,5-dione
—— 8-(3,3-Dimethyloxiran-2-yl)-8-hydroxy-4,6,12,17,17-pentamethyl-9-oxahexacyclo[11.9.0.01,21.04,12.05,10.016,21]docosan-18-one —— C30H46O4
8-(3,3-Dimethyloxiran-2-yl)-8-hydroxy-4,6,12,17,17-pentamethyl-9-oxahexacyclo[11.9.0.01,21.04,12.05,10.016,21]docosan-18-one
—— 8-(2,5,5,8a-Tetramethyl-1,4,4a,6,7,8-hexahydronaphthalen-1-yl)-6-methyloct-5-en-2-one —— C23H38O
8-(2,5,5,8a-Tetramethyl-1,4,4a,6,7,8-hexahydronaphthalen-1-yl)-6-methyloct-5-en-2-one
—— 8-ethoxy-1,3-dimethyl-6-(4-propoxyphenyl)-4H-cyclohepta[c]furan-4-one —— C22H24O4
8-ethoxy-1,3-dimethyl-6-(4-propoxyphenyl)-4H-cyclohepta[c]furan-4-one
—— 8a-[4,5-Dihydroxy-3-[3-hydroxy-6-methyl-4,5-bis[(3,4,5-trihydroxyoxan-2-yl)oxy]oxan-2-yl]oxyoxan-2-yl]oxycarbonyl-3-[3-[4,5-dihydroxy-6-(hydroxymethyl)-3-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-2-hydroxy-4,6a,6b,11,11,14b-hexamethyl-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicene-4-carboxylic acid —— C69H110O37
8a-[4,5-Dihydroxy-3-[3-hydroxy-6-methyl-4,5-bis[(3,4,5-trihydroxyoxan-2-yl)oxy]oxan-2-yl]oxyoxan-2-yl]oxycarbonyl-3-[3-[4,5-dihydroxy-6-(hydroxymethyl)-3-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-4,5-dihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-2-hydroxy-4,6a,6b,11,11,14b-hexamethyl-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicene-4-carboxylic acid
—— 8-[(dimethylamino)methyl]-7-hydroxy-3-(4-methoxyphenyl)-4H-chromen-4-one —— C19H19NO4
8-[(dimethylamino)methyl]-7-hydroxy-3-(4-methoxyphenyl)-4H-chromen-4-one
—— 8-Hydroxy-11-(hydroxymethyl)-11-methyl-5-methylidene-16-oxapentacyclo[7.5.2.24,7.01,10.02,7]octadecan-15-one —— C20H28O4
8-Hydroxy-11-(hydroxymethyl)-11-methyl-5-methylidene-16-oxapentacyclo[7.5.2.24,7.01,10.02,7]octadecan-15-one
—— 8-(2-Carboxyethyl)-15-[3-(diaminomethylideneamino)propyl]-18-(6-methoxy-3,5-dimethyl-7-phenylhepta-1,3-dienyl)-1,5,12,19-tetramethyl-2-methylidene-3,6,9,13,16,20,25-heptaoxo-1,4,7,10,14,17,21-heptazacyclopentacosane-11,22-dicarboxylic acid —— C48H70N10O14
8-(2-Carboxyethyl)-15-[3-(diaminomethylideneamino)propyl]-18-(6-methoxy-3,5-dimethyl-7-phenylhepta-1,3-dienyl)-1,5,12,19-tetramethyl-2-methylidene-3,6,9,13,16,20,25-heptaoxo-1,4,7,10,14,17,21-heptazacyclopentacosane-11,22-dicarboxylic acid
—— 8-carboxy-N,3,18-trihydroxy-14-[[2-[2-[[3-hydroxy-2-[methyl(12-methyltetradecanoyl)amino]propanoyl]amino]propanoylamino]acetyl]-methylamino]-11-methyl-10,13-dioxo-9,12-diazatricyclo[13.3.1.12,6]icosa-1(18),2,4,6(20),15(19),16-hexaen-4-amine oxide —— C45H67N7O13
8-carboxy-N,3,18-trihydroxy-14-[[2-[2-[[3-hydroxy-2-[methyl(12-methyltetradecanoyl)amino]propanoyl]amino]propanoylamino]acetyl]-methylamino]-11-methyl-10,13-dioxo-9,12-diazatricyclo[13.3.1.12,6]icosa-1(18),2,4,6(20),15(19),16-hexaen-4-amine oxide
—— 8-(3,5-Dihydroxyphenyl)-5-hydroxy-2-methyl-2-(4-methylpent-3-enyl)-7,8-dihydropyrano[3,2-g]chromen-6-one —— C25H26O6
8-(3,5-Dihydroxyphenyl)-5-hydroxy-2-methyl-2-(4-methylpent-3-enyl)-7,8-dihydropyrano[3,2-g]chromen-6-one
—— 8-(2,5,5,8a-Tetramethyl-1,4,4a,6,7,8-hexahydronaphthalen-1-yl)-6-methyloct-5-en-2-ol —— C23H40O
8-(2,5,5,8a-Tetramethyl-1,4,4a,6,7,8-hexahydronaphthalen-1-yl)-6-methyloct-5-en-2-ol
—— (8-Acetyl-1-ethyl-7-formyl-1,4a,6a,10b-tetramethyl-2,3,4,4b,5,6,7,10,10a,11,12,12a-dodecahydrochrysen-6-yl) 3-propanoyloxybutanoate —— C34H52O6
(8-Acetyl-1-ethyl-7-formyl-1,4a,6a,10b-tetramethyl-2,3,4,4b,5,6,7,10,10a,11,12,12a-dodecahydrochrysen-6-yl) 3-propanoyloxybutanoate
—— 8-oxo-N-[1-(tricyclo[3.3.1.1~3,7~]dec-1-yl)ethyl]-1,5,6,8-tetrahydro-2H-1,5-methanopyrido[1,2-a][1,5]diazocine-3(4H)-carbothioamide —— C24H33N3OS
8-oxo-N-[1-(tricyclo[3.3.1.1~3,7~]dec-1-yl)ethyl]-1,5,6,8-tetrahydro-2H-1,5-methanopyrido[1,2-a][1,5]diazocine-3(4H)-carbothioamide
—— 8,13-Dimethyl-3-methylidene-5,12-dioxatetracyclo[7.5.0.02,6.011,13]tetradecane-2,6,14-triol —— C15H22O5
8,13-Dimethyl-3-methylidene-5,12-dioxatetracyclo[7.5.0.02,6.011,13]tetradecane-2,6,14-triol
—— (8,10,12-Triacetyloxy-9-benzoyloxy-2,6-dihydroxy-3,7,13-trimethyl-9-prop-1-en-2-yl-14-oxatetracyclo[11.1.1.01,5.06,11]pentadecan-15-yl) benzoate —— C40H46O13
(8,10,12-Triacetyloxy-9-benzoyloxy-2,6-dihydroxy-3,7,13-trimethyl-9-prop-1-en-2-yl-14-oxatetracyclo[11.1.1.01,5.06,11]pentadecan-15-yl) benzoate
—— 8a-methyl-5-methylidene-3-[[methyl(2,3,4,5,6-pentahydroxyhexyl)amino]methyl]-3a,4,4a,6,7,8,9,9a-octahydro-3H-benzo[f][1]benzofuran-2-one —— C22H37NO7
8a-methyl-5-methylidene-3-[[methyl(2,3,4,5,6-pentahydroxyhexyl)amino]methyl]-3a,4,4a,6,7,8,9,9a-octahydro-3H-benzo[f][1]benzofuran-2-one
—— 8-[[4-(3-Chlorophenyl)piperazin-1-yl]methyl]-7-hydroxy-3-(4-methoxyphenyl)-2-methylchromen-4-one —— C28H27ClN2O4
8-[[4-(3-Chlorophenyl)piperazin-1-yl]methyl]-7-hydroxy-3-(4-methoxyphenyl)-2-methylchromen-4-one
—— 8-Hydroxy-4-(hydroxymethyl)-2-methoxy-6a,6b,11,11,14b-pentamethyl-3-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicene-4,8a-dicarboxylic acid —— C37H58O13
8-Hydroxy-4-(hydroxymethyl)-2-methoxy-6a,6b,11,11,14b-pentamethyl-3-[3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy-1,2,3,4a,5,6,7,8,9,10,12,12a,14,14a-tetradecahydropicene-4,8a-dicarboxylic acid
—— 8-methoxy-3-(4-methoxyphenethyl)-5-methyl-3H-pyrimido[5,4-b]indol-4(5H)-one —— C21H21N3O3
8-methoxy-3-(4-methoxyphenethyl)-5-methyl-3H-pyrimido[5,4-b]indol-4(5H)-one
—— 8-chloro-7-[(3,4,5-trimethoxybenzyl)oxy]-2,3-dihydrocyclopenta[c]chromen-4(1H)-one —— C22H21ClO6
8-chloro-7-[(3,4,5-trimethoxybenzyl)oxy]-2,3-dihydrocyclopenta[c]chromen-4(1H)-one
—— 8-Acetyl-5,7-dihydroxy-1,3,4a,6-tetramethyl-[1]benzofuro[3,2-f]indazol-4-one 71368-49-5 C19H18N2O5
8-Acetyl-5,7-dihydroxy-1,3,4a,6-tetramethyl-[1]benzofuro[3,2-f]indazol-4-one
—— 8-(3-Methoxyphenyl)-4-methyl-2-(oxetan-3-yl)-1,3,3a,10a-tetrahydropyrrolo[3,4-b][1,4]benzoxazepin-5-one —— C22H24N2O4
8-(3-Methoxyphenyl)-4-methyl-2-(oxetan-3-yl)-1,3,3a,10a-tetrahydropyrrolo[3,4-b][1,4]benzoxazepin-5-one
—— 8a-Ethenyl-4-hydroxy-3,5-dimethylideneoctahydro-2h-furo[3,2-g]isochromene-2,6(3h)-dione 59598-30-0 C15H16O5
8a-Ethenyl-4-hydroxy-3,5-dimethylideneoctahydro-2h-furo[3,2-g]isochromene-2,6(3h)-dione
—— (8-Methyl-6-oxo-1,2,3a,4,5,6-hexahydro-3H-3,10b-diazaacephenanthrylen-3-yl)acetonitrile —— C17H17N3O
(8-Methyl-6-oxo-1,2,3a,4,5,6-hexahydro-3H-3,10b-diazaacephenanthrylen-3-yl)acetonitrile
—— 8,10,10-trimethyl-10a-[2-(4-methylsulfanylphenyl)ethenyl]-3,4-dihydro-1H-pyrimido[1,2-a]indol-2-one —— C23H26N2OS
8,10,10-trimethyl-10a-[2-(4-methylsulfanylphenyl)ethenyl]-3,4-dihydro-1H-pyrimido[1,2-a]indol-2-one