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    首页 分子通 按分子结构分类 有机化合物 有机杂环化合物 吡啶并嘧啶类

    吡啶并嘧啶类

    中文名称 英文名称 CAS号 化学式 结构式图片
    —— 7-(2-hydroxyethyl)-6-imino-N-(2-methylpropyl)-2-oxo-1,7,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),4,9,11,13-pentaene-5-carboxamide —— C18H21N5O3
    7-(2-hydroxyethyl)-6-imino-N-(2-methylpropyl)-2-oxo-1,7,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),4,9,11,13-pentaene-5-carboxamide
    —— methyl 2-imino-10-methyl-5-oxo-1-(pyridin-4-ylmethyl)-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxylate —— C20H17N5O3
    methyl 2-imino-10-methyl-5-oxo-1-(pyridin-4-ylmethyl)-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxylate
    —— N-[2-(1H-indol-3-yl)ethyl]-2-oxo-4-thia-1,8-diazatricyclo[7.4.0.03,7]trideca-3(7),5,8,10,12-pentaene-10-carboxamide —— C21H16N4O2S
    N-[2-(1H-indol-3-yl)ethyl]-2-oxo-4-thia-1,8-diazatricyclo[7.4.0.03,7]trideca-3(7),5,8,10,12-pentaene-10-carboxamide
    —— N-(7-benzyl-5-cyano-2-oxo-1,7,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),4,9,11,13-pentaen-6-ylidene)-4-chlorobenzamide —— C26H16ClN5O2
    N-(7-benzyl-5-cyano-2-oxo-1,7,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),4,9,11,13-pentaen-6-ylidene)-4-chlorobenzamide
    —— 2-(3-Methoxyphenyl)-6-octanoyl-3,5,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-one —— C22H29N3O3
    2-(3-Methoxyphenyl)-6-octanoyl-3,5,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-one
    —— Ethyl 6-(2,4-dichlorobenzoyl)imino-2-oxo-7-propan-2-yl-1,7,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),4,9,11,13-pentaene-5-carboxylate —— C24H20Cl2N4O4
    Ethyl 6-(2,4-dichlorobenzoyl)imino-2-oxo-7-propan-2-yl-1,7,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),4,9,11,13-pentaene-5-carboxylate
    —— 2-[(2-Fluorophenyl)methylsulfanyl]-5-thiophen-2-yl-3,5,7,8,9,10-hexahydropyrimido[4,5-b]quinoline-4,6-dione —— C22H18FN3O2S2
    2-[(2-Fluorophenyl)methylsulfanyl]-5-thiophen-2-yl-3,5,7,8,9,10-hexahydropyrimido[4,5-b]quinoline-4,6-dione
    —— (5Z)-5-[[2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-(2-methoxyethyl)-2-sulfanylidene-1,3-thiazolidin-4-one —— C22H26N4O3S2
    (5Z)-5-[[2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-(2-methoxyethyl)-2-sulfanylidene-1,3-thiazolidin-4-one
    —— (5Z)-5-[[2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-(2-methoxyethyl)-2-sulfanylidene-1,3-thiazolidin-4-one —— C22H26N4O3S2
    (5Z)-5-[[2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-(2-methoxyethyl)-2-sulfanylidene-1,3-thiazolidin-4-one
    —— 1-(2-hydroxyethyl)-2-imino-N-(3-methoxypropyl)-10-methyl-5-oxo-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide —— C19H23N5O4
    1-(2-hydroxyethyl)-2-imino-N-(3-methoxypropyl)-10-methyl-5-oxo-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide
    —— (Z)-N-benzyl-2-cyano-3-(9-methyl-4-oxo-2-piperidin-1-ylpyrido[1,2-a]pyrimidin-3-yl)prop-2-enamide —— C25H25N5O2
    (Z)-N-benzyl-2-cyano-3-(9-methyl-4-oxo-2-piperidin-1-ylpyrido[1,2-a]pyrimidin-3-yl)prop-2-enamide
    —— (5E)-3-[[(2S)-oxolan-2-yl]methyl]-5-[(4-oxo-2-pyrrolidin-1-ylpyrido[1,2-a]pyrimidin-3-yl)methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one —— C21H22N4O3S2
    (5E)-3-[[(2S)-oxolan-2-yl]methyl]-5-[(4-oxo-2-pyrrolidin-1-ylpyrido[1,2-a]pyrimidin-3-yl)methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— (5E)-3-[(2S)-2-ethylhexyl]-5-[(4-oxo-2-pyrrolidin-1-ylpyrido[1,2-a]pyrimidin-3-yl)methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one —— C24H30N4O2S2
    (5E)-3-[(2S)-2-ethylhexyl]-5-[(4-oxo-2-pyrrolidin-1-ylpyrido[1,2-a]pyrimidin-3-yl)methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— 2-[(5E)-5-[[2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-7-methyl-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidin-3-yl]acetic acid —— C22H24N4O4S2
    2-[(5E)-5-[[2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-7-methyl-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidin-3-yl]acetic acid
    —— (5E)-3-[(2R)-2-ethylhexyl]-5-[(4-oxo-2-pyrrolidin-1-ylpyrido[1,2-a]pyrimidin-3-yl)methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one —— C24H30N4O2S2
    (5E)-3-[(2R)-2-ethylhexyl]-5-[(4-oxo-2-pyrrolidin-1-ylpyrido[1,2-a]pyrimidin-3-yl)methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— 2-[(5E)-5-[[2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-7-methyl-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidin-3-yl]acetic acid —— C22H24N4O4S2
    2-[(5E)-5-[[2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-7-methyl-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-4-oxo-2-sulfanylidene-1,3-thiazolidin-3-yl]acetic acid
    —— 2-Methyl-6-(2,4,6-trimethylphenyl)sulfonyl-3,5,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-one —— C17H21N3O3S
    2-Methyl-6-(2,4,6-trimethylphenyl)sulfonyl-3,5,7,8-tetrahydropyrido[4,3-d]pyrimidin-4-one
    —— 2-[(7-Bromo-4-oxopyrido[1,2-a]pyrimidin-2-yl)methylsulfanyl]-1-butylbenzimidazole-5-sulfonamide —— C20H20BrN5O3S2
    2-[(7-Bromo-4-oxopyrido[1,2-a]pyrimidin-2-yl)methylsulfanyl]-1-butylbenzimidazole-5-sulfonamide
    —— (5E)-3-[(2R)-2-ethylhexyl]-5-[[2-(furan-2-ylmethylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one —— C25H28N4O3S2
    (5E)-3-[(2R)-2-ethylhexyl]-5-[[2-(furan-2-ylmethylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— (5E)-3-[(2S)-2-ethylhexyl]-5-[[2-(furan-2-ylmethylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one —— C25H28N4O3S2
    (5E)-3-[(2S)-2-ethylhexyl]-5-[[2-(furan-2-ylmethylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— Methyl 2-cyano-3-(2-morpholin-4-yl-4-oxopyrido[1,2-a]pyrimidin-3-yl)prop-2-enoate —— C17H16N4O4
    Methyl 2-cyano-3-(2-morpholin-4-yl-4-oxopyrido[1,2-a]pyrimidin-3-yl)prop-2-enoate
    —— 5-(2H-1,3-Benzodioxol-5-YL)-2-{[(2-chlorophenyl)methyl]sulfanyl}-8,8-dimethyl-3H,4H,5H,6H,7H,8H,9H,10H-pyrimido[4,5-B]quinoline-4,6-dione —— C27H24ClN3O4S
    5-(2H-1,3-Benzodioxol-5-YL)-2-{[(2-chlorophenyl)methyl]sulfanyl}-8,8-dimethyl-3H,4H,5H,6H,7H,8H,9H,10H-pyrimido[4,5-B]quinoline-4,6-dione
    —— 3-Butan-2-yl-5-[[2-(3,5-dimethylpiperidin-1-yl)-9-methyl-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one —— C24H30N4O2S2
    3-Butan-2-yl-5-[[2-(3,5-dimethylpiperidin-1-yl)-9-methyl-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— (5E)-3-[(3S)-1,1-dioxothiolan-3-yl]-5-[[2-(2-methoxyethylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one —— C19H20N4O5S3
    (5E)-3-[(3S)-1,1-dioxothiolan-3-yl]-5-[[2-(2-methoxyethylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— ethyl 6-(4-ethoxybenzoyl)imino-2-oxo-7-[[(2S)-oxolan-2-yl]methyl]-1,7,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),4,9,11,13-pentaene-5-carboxylate —— C28H28N4O6
    ethyl 6-(4-ethoxybenzoyl)imino-2-oxo-7-[[(2S)-oxolan-2-yl]methyl]-1,7,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),4,9,11,13-pentaene-5-carboxylate
    —— 3-[(4-Methylphenyl)methyl]-5-[[4-oxo-2-(prop-2-enylamino)pyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one —— C23H20N4O2S2
    3-[(4-Methylphenyl)methyl]-5-[[4-oxo-2-(prop-2-enylamino)pyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— (5E)-3-[(2S)-butan-2-yl]-5-[[2-[(4-methoxyphenyl)methylamino]-7-methyl-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one —— C25H26N4O3S2
    (5E)-3-[(2S)-butan-2-yl]-5-[[2-[(4-methoxyphenyl)methylamino]-7-methyl-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— 5-[[2-(3-Imidazol-1-ylpropylamino)-9-methyl-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-propan-2-yl-2-sulfanylidene-1,3-thiazolidin-4-one —— C22H24N6O2S2
    5-[[2-(3-Imidazol-1-ylpropylamino)-9-methyl-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-propan-2-yl-2-sulfanylidene-1,3-thiazolidin-4-one
    —— (5E)-3-[(2S)-butan-2-yl]-5-[[9-methyl-4-oxo-2-[[(2S)-oxolan-2-yl]methylamino]pyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one —— C22H26N4O3S2
    (5E)-3-[(2S)-butan-2-yl]-5-[[9-methyl-4-oxo-2-[[(2S)-oxolan-2-yl]methylamino]pyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— (5E)-5-[[9-methyl-4-oxo-2-[[(2S)-oxolan-2-yl]methylamino]pyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-[[(2S)-oxolan-2-yl]methyl]-2-sulfanylidene-1,3-thiazolidin-4-one —— C23H26N4O4S2
    (5E)-5-[[9-methyl-4-oxo-2-[[(2S)-oxolan-2-yl]methylamino]pyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-[[(2S)-oxolan-2-yl]methyl]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— (5E)-5-[[2-(3-methoxypropylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-(2-phenylethyl)-2-sulfanylidene-1,3-thiazolidin-4-one —— C24H24N4O3S2
    (5E)-5-[[2-(3-methoxypropylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-(2-phenylethyl)-2-sulfanylidene-1,3-thiazolidin-4-one
    —— (5E)-5-[[2-(2-methoxyethylamino)-9-methyl-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-methyl-2-sulfanylidene-1,3-thiazolidin-4-one —— C17H18N4O3S2
    (5E)-5-[[2-(2-methoxyethylamino)-9-methyl-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-methyl-2-sulfanylidene-1,3-thiazolidin-4-one
    —— (5E)-3-(3-methoxypropyl)-5-[(9-methyl-4-oxo-2-pyrrolidin-1-ylpyrido[1,2-a]pyrimidin-3-yl)methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one —— C21H24N4O3S2
    (5E)-3-(3-methoxypropyl)-5-[(9-methyl-4-oxo-2-pyrrolidin-1-ylpyrido[1,2-a]pyrimidin-3-yl)methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— (5E)-5-[[4-oxo-2-(3-propan-2-yloxypropylamino)pyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-propyl-2-sulfanylidene-1,3-thiazolidin-4-one —— C21H26N4O3S2
    (5E)-5-[[4-oxo-2-(3-propan-2-yloxypropylamino)pyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-propyl-2-sulfanylidene-1,3-thiazolidin-4-one
    —— (5E)-5-[[2-(benzylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-[(1R)-1-phenylethyl]-2-sulfanylidene-1,3-thiazolidin-4-one —— C27H22N4O2S2
    (5E)-5-[[2-(benzylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-3-[(1R)-1-phenylethyl]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— 2-(1,3-Benzothiazol-2-yl)-3-[2-(dibenzylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]prop-2-enenitrile —— C32H23N5OS
    2-(1,3-Benzothiazol-2-yl)-3-[2-(dibenzylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]prop-2-enenitrile
    —— 3-oxo-1-phenyl-1-(trifluoromethyl)-1H,2H,3H-pyrido[1,2-c]pyrimidine-4-carbonitrile —— C16H10F3N3O
    3-oxo-1-phenyl-1-(trifluoromethyl)-1H,2H,3H-pyrido[1,2-c]pyrimidine-4-carbonitrile
    —— Methyl 2-(benzylsulfanyl)-5-(4-fluorophenyl)-7-methyl-4-oxo-3,4,5,8-tetrahydropyrido[2,3-d]pyrimidine-6-carboxylate —— C23H20FN3O3S
    Methyl 2-(benzylsulfanyl)-5-(4-fluorophenyl)-7-methyl-4-oxo-3,4,5,8-tetrahydropyrido[2,3-d]pyrimidine-6-carboxylate
    —— N-benzyl-2-imino-1-[2-(4-methoxyphenyl)ethyl]-5-oxo-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide —— C28H25N5O3
    N-benzyl-2-imino-1-[2-(4-methoxyphenyl)ethyl]-5-oxo-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide
    —— (5E)-3-(2-methoxyethyl)-5-[[2-(2-morpholin-4-ylethylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one —— C21H25N5O4S2
    (5E)-3-(2-methoxyethyl)-5-[[2-(2-morpholin-4-ylethylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— N-(1-cyano-9,10-dimethoxy-2,3,6,7-tetrahydrobenzo[a]quinolizin-4-ylidene)-2,4-dioxo-1H-pyrimidine-6-carboxamide —— C21H19N5O5
    N-(1-cyano-9,10-dimethoxy-2,3,6,7-tetrahydrobenzo[a]quinolizin-4-ylidene)-2,4-dioxo-1H-pyrimidine-6-carboxamide
    —— 1-cyclohexyl-2-imino-N-(4-methoxybenzyl)-5-oxo-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide —— C26H27N5O3
    1-cyclohexyl-2-imino-N-(4-methoxybenzyl)-5-oxo-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide
    —— 6-Imino-11-methyl-5-(4-methylpiperazine-1-carbonyl)-7-(1-phenylethyl)-1,7,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),4,9,11,13-pentaen-2-one —— C26H28N6O2
    6-Imino-11-methyl-5-(4-methylpiperazine-1-carbonyl)-7-(1-phenylethyl)-1,7,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),4,9,11,13-pentaen-2-one
    —— 1-(4-fluorobenzyl)-2-imino-N-[2-(4-methoxyphenyl)ethyl]-10-methyl-5-oxo-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide —— C29H26FN5O3
    1-(4-fluorobenzyl)-2-imino-N-[2-(4-methoxyphenyl)ethyl]-10-methyl-5-oxo-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide
    —— 3-Heptyl-5-[[7-methyl-2-(2-methylpropylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one —— C24H32N4O2S2
    3-Heptyl-5-[[7-methyl-2-(2-methylpropylamino)-4-oxopyrido[1,2-a]pyrimidin-3-yl]methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— N-[2-(3,4-dimethoxyphenyl)ethyl]-1-(3-ethoxypropyl)-2-imino-5-oxo-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide —— C27H31N5O5
    N-[2-(3,4-dimethoxyphenyl)ethyl]-1-(3-ethoxypropyl)-2-imino-5-oxo-1,5-dihydro-2H-dipyrido[1,2-a:2',3'-d]pyrimidine-3-carboxamide
    —— Ethyl 6-(3-chlorobenzoyl)imino-7-(2-methoxyethyl)-11-methyl-2-oxo-1,7,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),4,9,11,13-pentaene-5-carboxylate —— C25H23ClN4O5
    Ethyl 6-(3-chlorobenzoyl)imino-7-(2-methoxyethyl)-11-methyl-2-oxo-1,7,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),4,9,11,13-pentaene-5-carboxylate
    —— 3-(2-Methoxyethyl)-5-[(4-oxo-2-piperidin-1-ylpyrido[1,2-a]pyrimidin-3-yl)methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one —— C20H22N4O3S2
    3-(2-Methoxyethyl)-5-[(4-oxo-2-piperidin-1-ylpyrido[1,2-a]pyrimidin-3-yl)methylidene]-2-sulfanylidene-1,3-thiazolidin-4-one
    —— 7-(3-hydroxypropyl)-6-imino-11-methyl-2-oxo-N-prop-2-enyl-1,7,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),4,9,11,13-pentaene-5-carboxamide —— C19H21N5O3
    7-(3-hydroxypropyl)-6-imino-11-methyl-2-oxo-N-prop-2-enyl-1,7,9-triazatricyclo[8.4.0.03,8]tetradeca-3(8),4,9,11,13-pentaene-5-carboxamide
    —— methyl 2-ethylsulfanyl-5-(4-methoxyphenyl)-7-methyl-4-oxo-5,8-dihydro-3H-pyrido[2,3-d]pyrimidine-6-carboxylate —— C19H21N3O4S
    methyl 2-ethylsulfanyl-5-(4-methoxyphenyl)-7-methyl-4-oxo-5,8-dihydro-3H-pyrido[2,3-d]pyrimidine-6-carboxylate