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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 吡咯烷类

    吡咯烷类

    中文名称 英文名称 CAS号 化学式 结构式图片
    —— 3-acetyl-4-ethyl-1-phenyl-1,3,3a,4,9,9a-hexahydro-2H-pyrrolo[2,3-b]quinoxalin-2-one —— C20H21N3O2
    3-acetyl-4-ethyl-1-phenyl-1,3,3a,4,9,9a-hexahydro-2H-pyrrolo[2,3-b]quinoxalin-2-one
    —— 5-(3-Butoxyphenyl)-1-(6-ethoxy-1,3-benzothiazol-2-yl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]pyrrolidine-2,3-dione —— C33H32N2O6S
    5-(3-Butoxyphenyl)-1-(6-ethoxy-1,3-benzothiazol-2-yl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]pyrrolidine-2,3-dione
    —— 5-(3-Ethoxy-4-prop-2-enoxyphenyl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-1-(6-methoxy-1,3-benzothiazol-2-yl)pyrrolidine-2,3-dione —— C33H30N2O7S
    5-(3-Ethoxy-4-prop-2-enoxyphenyl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-1-(6-methoxy-1,3-benzothiazol-2-yl)pyrrolidine-2,3-dione
    —— [2-(4-butoxy-3-methoxyphenyl)-1-[3-(1H-imidazol-3-ium-3-yl)propyl]-4,5-dioxopyrrolidin-3-ylidene]-(2,3-dihydro-1,4-benzodioxin-6-yl)methanolate —— C30H33N3O7
    [2-(4-butoxy-3-methoxyphenyl)-1-[3-(1H-imidazol-3-ium-3-yl)propyl]-4,5-dioxopyrrolidin-3-ylidene]-(2,3-dihydro-1,4-benzodioxin-6-yl)methanolate
    —— (4E)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-[3-(1H-imidazol-3-ium-3-yl)propyl]-5-(3-methoxy-4-phenylmethoxyphenyl)pyrrolidine-2,3-dione —— C33H32N3O7+
    (4E)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-[3-(1H-imidazol-3-ium-3-yl)propyl]-5-(3-methoxy-4-phenylmethoxyphenyl)pyrrolidine-2,3-dione
    —— 4-[(4-Bromophenyl)-hydroxymethylidene]-1-hexadecyl-5-phenylpyrrolidine-2,3-dione —— C33H44BrNO3
    4-[(4-Bromophenyl)-hydroxymethylidene]-1-hexadecyl-5-phenylpyrrolidine-2,3-dione
    —— (4E)-5-(4-butoxy-3-ethoxyphenyl)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-[3-(1H-imidazol-3-ium-3-yl)propyl]pyrrolidine-2,3-dione —— C31H36N3O7+
    (4E)-5-(4-butoxy-3-ethoxyphenyl)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-[3-(1H-imidazol-3-ium-3-yl)propyl]pyrrolidine-2,3-dione
    —— (E)-{2-[4-(benzyloxy)-3-methoxyphenyl]-1-[3-(1H-imidazol-3-ium-1-yl)propyl]-4,5-dioxopyrrolidin-3-ylidene}(2,3-dihydro-1,4-benzodioxin-6-yl)methanolate —— C33H31N3O7
    (E)-{2-[4-(benzyloxy)-3-methoxyphenyl]-1-[3-(1H-imidazol-3-ium-1-yl)propyl]-4,5-dioxopyrrolidin-3-ylidene}(2,3-dihydro-1,4-benzodioxin-6-yl)methanolate
    —— Ethyl 2-[3-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-2-[3-(3-methylbutoxy)phenyl]-4,5-dioxopyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate —— C32H34N2O7S
    Ethyl 2-[3-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-2-[3-(3-methylbutoxy)phenyl]-4,5-dioxopyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate
    —— 1-(5-Benzylsulfanyl-1,3,4-thiadiazol-2-yl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-5-(3-pentoxyphenyl)pyrrolidine-2,3-dione —— C34H33N3O5S2
    1-(5-Benzylsulfanyl-1,3,4-thiadiazol-2-yl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-5-(3-pentoxyphenyl)pyrrolidine-2,3-dione
    —— 4-[Hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-5-[3-(3-methylbutoxy)phenyl]-1-[5-(naphthalen-1-ylmethylsulfanyl)-1,3,4-thiadiazol-2-yl]pyrrolidine-2,3-dione —— C38H35N3O5S2
    4-[Hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-5-[3-(3-methylbutoxy)phenyl]-1-[5-(naphthalen-1-ylmethylsulfanyl)-1,3,4-thiadiazol-2-yl]pyrrolidine-2,3-dione
    —— Methyl 2-[4-[hydroxy-(3-methyl-4-phenylmethoxyphenyl)methylidene]-2,3-dioxo-5-(3,4,5-trimethoxyphenyl)pyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate —— C34H32N2O9S
    Methyl 2-[4-[hydroxy-(3-methyl-4-phenylmethoxyphenyl)methylidene]-2,3-dioxo-5-(3,4,5-trimethoxyphenyl)pyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate
    —— 1-(1,3-Benzodioxol-5-ylmethyl)-1-{1-[4-(hexyloxy)phenyl]-2,5-dioxopyrrolidin-3-yl}-3-phenylthiourea —— C31H33N3O5S
    1-(1,3-Benzodioxol-5-ylmethyl)-1-{1-[4-(hexyloxy)phenyl]-2,5-dioxopyrrolidin-3-yl}-3-phenylthiourea
    —— 4-methyl-N-{5-[(3-phenylpyrrolidin-1-yl)methyl]-1,3-thiazol-2-yl}benzamide —— C22H23N3OS
    4-methyl-N-{5-[(3-phenylpyrrolidin-1-yl)methyl]-1,3-thiazol-2-yl}benzamide
    —— 1-[2-(4-methyl-1,3-thiazol-2-yl)ethyl]-3-[[(3R)-1-phenylpyrrolidin-3-yl]methyl]urea —— C18H24N4OS
    1-[2-(4-methyl-1,3-thiazol-2-yl)ethyl]-3-[[(3R)-1-phenylpyrrolidin-3-yl]methyl]urea
    —— 2-[(3R)-3-(2-fluorophenyl)-2,5-dioxopyrrolidin-1-yl]acetic acid —— C12H10FNO4
    2-[(3R)-3-(2-fluorophenyl)-2,5-dioxopyrrolidin-1-yl]acetic acid
    —— Ethyl 2-[4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-2,3-dioxo-5-(3-phenylmethoxyphenyl)pyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate —— C34H30N2O7S
    Ethyl 2-[4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-2,3-dioxo-5-(3-phenylmethoxyphenyl)pyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate
    —— 5-(3-Butoxyphenyl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-1-[5-[(4-methylphenyl)methylsulfanyl]-1,3,4-thiadiazol-2-yl]pyrrolidine-2,3-dione —— C34H33N3O5S2
    5-(3-Butoxyphenyl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-1-[5-[(4-methylphenyl)methylsulfanyl]-1,3,4-thiadiazol-2-yl]pyrrolidine-2,3-dione
    —— (4E)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-5-(4-hydroxyphenyl)-1-[3-(1H-imidazol-3-ium-3-yl)propyl]pyrrolidine-2,3-dione —— C26H26N3O5+
    (4E)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-5-(4-hydroxyphenyl)-1-[3-(1H-imidazol-3-ium-3-yl)propyl]pyrrolidine-2,3-dione
    —— 1-[5-[(4-Fluorophenyl)methylsulfanyl]-1,3,4-thiadiazol-2-yl]-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-5-(3-pentoxyphenyl)pyrrolidine-2,3-dione —— C34H32FN3O5S2
    1-[5-[(4-Fluorophenyl)methylsulfanyl]-1,3,4-thiadiazol-2-yl]-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-5-(3-pentoxyphenyl)pyrrolidine-2,3-dione
    —— Prop-2-enyl 2-[2-(4-ethoxyphenyl)-3-[hydroxy-(3-methyl-4-phenylmethoxyphenyl)methylidene]-4,5-dioxopyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate —— C35H32N2O7S
    Prop-2-enyl 2-[2-(4-ethoxyphenyl)-3-[hydroxy-(3-methyl-4-phenylmethoxyphenyl)methylidene]-4,5-dioxopyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate
    —— 5-(4-Hydroxy-3-methoxyphenyl)-4-[hydroxy-(4-piperidin-1-ylsulfonylphenyl)methylidene]-1-(2-methoxyethyl)pyrrolidine-2,3-dione —— C26H30N2O8S
    5-(4-Hydroxy-3-methoxyphenyl)-4-[hydroxy-(4-piperidin-1-ylsulfonylphenyl)methylidene]-1-(2-methoxyethyl)pyrrolidine-2,3-dione
    —— (E)-{2-(4-hydroxyphenyl)-1-[3-(1H-imidazol-3-ium-1-yl)propyl]-4,5-dioxopyrrolidin-3-ylidene}(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methanolate —— C26H25N3O5
    (E)-{2-(4-hydroxyphenyl)-1-[3-(1H-imidazol-3-ium-1-yl)propyl]-4,5-dioxopyrrolidin-3-ylidene}(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methanolate
    —— 5-(4-Butoxy-3-methoxyphenyl)-1-(4,6-dimethyl-1,3-benzothiazol-2-yl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]pyrrolidine-2,3-dione —— C34H34N2O6S
    5-(4-Butoxy-3-methoxyphenyl)-1-(4,6-dimethyl-1,3-benzothiazol-2-yl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]pyrrolidine-2,3-dione
    —— 1-[5-[(2-Chlorophenyl)methylsulfanyl]-1,3,4-thiadiazol-2-yl]-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-5-(3-propoxyphenyl)pyrrolidine-2,3-dione —— C32H28ClN3O5S2
    1-[5-[(2-Chlorophenyl)methylsulfanyl]-1,3,4-thiadiazol-2-yl]-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-5-(3-propoxyphenyl)pyrrolidine-2,3-dione
    —— 1-[1-(4-Chlorophenyl)-2,5-dioxopyrrolidin-3-yl]-1-[2-(3,4-dimethoxyphenyl)ethyl]-3-methylthiourea —— C22H24ClN3O4S
    1-[1-(4-Chlorophenyl)-2,5-dioxopyrrolidin-3-yl]-1-[2-(3,4-dimethoxyphenyl)ethyl]-3-methylthiourea
    —— 1-[3-(Diethylamino)propyl]-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-5-(3-ethoxy-4-prop-2-enoxyphenyl)pyrrolidine-2,3-dione —— C31H38N2O7
    1-[3-(Diethylamino)propyl]-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-5-(3-ethoxy-4-prop-2-enoxyphenyl)pyrrolidine-2,3-dione
    —— [1-[3-(Diethylazaniumyl)propyl]-2-(3-ethoxy-4-prop-2-enoxyphenyl)-4,5-dioxopyrrolidin-3-ylidene]-(2,3-dihydro-1,4-benzodioxin-6-yl)methanolate —— C31H38N2O7
    [1-[3-(Diethylazaniumyl)propyl]-2-(3-ethoxy-4-prop-2-enoxyphenyl)-4,5-dioxopyrrolidin-3-ylidene]-(2,3-dihydro-1,4-benzodioxin-6-yl)methanolate
    —— 1-(5-Acetyl-4-methyl-1,3-thiazol-2-yl)-5-(3-ethoxy-4-pentoxyphenyl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]pyrrolidine-2,3-dione —— C33H36N2O7S
    1-(5-Acetyl-4-methyl-1,3-thiazol-2-yl)-5-(3-ethoxy-4-pentoxyphenyl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]pyrrolidine-2,3-dione
    —— 5-(4-Butoxy-3-methoxyphenyl)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-(4,6-dimethyl-1,3-benzothiazol-2-yl)pyrrolidine-2,3-dione —— C33H32N2O7S
    5-(4-Butoxy-3-methoxyphenyl)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-(4,6-dimethyl-1,3-benzothiazol-2-yl)pyrrolidine-2,3-dione
    —— 5-(4-Tert-butylphenyl)-1-(4,6-dimethyl-1,3-benzothiazol-2-yl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]pyrrolidine-2,3-dione —— C33H32N2O4S
    5-(4-Tert-butylphenyl)-1-(4,6-dimethyl-1,3-benzothiazol-2-yl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]pyrrolidine-2,3-dione
    —— 1-(2,2-Dimethoxyethyl)-4-[hydroxy(phenyl)methylidene]-5-(4-methoxyphenyl)pyrrolidine-2,3-dione —— C22H23NO6
    1-(2,2-Dimethoxyethyl)-4-[hydroxy(phenyl)methylidene]-5-(4-methoxyphenyl)pyrrolidine-2,3-dione
    —— 1-(2,2-Dimethoxyethyl)-5-(4-hydroxyphenyl)-4-[hydroxy(phenyl)methylidene]pyrrolidine-2,3-dione —— C21H21NO6
    1-(2,2-Dimethoxyethyl)-5-(4-hydroxyphenyl)-4-[hydroxy(phenyl)methylidene]pyrrolidine-2,3-dione
    —— Methyl 4-[3-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-1-[5-(naphthalen-1-ylmethylsulfanyl)-1,3,4-thiadiazol-2-yl]-4,5-dioxopyrrolidin-2-yl]benzoate —— C35H27N3O6S2
    Methyl 4-[3-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-1-[5-(naphthalen-1-ylmethylsulfanyl)-1,3,4-thiadiazol-2-yl]-4,5-dioxopyrrolidin-2-yl]benzoate
    —— 3-(3,5-Dimethylbenzyl)-4-methyl-1-[4-(trifluoromethoxy)phenyl]pyrrolidine-2,5-dione —— C21H20F3NO3
    3-(3,5-Dimethylbenzyl)-4-methyl-1-[4-(trifluoromethoxy)phenyl]pyrrolidine-2,5-dione
    —— C29H29BrN2O5 —— C29H29BrN2O5
    C29H29BrN2O5
    —— 5-(2,3-Dimethoxyphenyl)-4-[hydroxy-(4-prop-2-enoxyphenyl)methylidene]-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione —— C28H26N2O6
    5-(2,3-Dimethoxyphenyl)-4-[hydroxy-(4-prop-2-enoxyphenyl)methylidene]-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione
    —— [2-(2,3-Dimethoxyphenyl)-4,5-dioxo-1-(pyridin-1-ium-3-ylmethyl)pyrrolidin-3-ylidene]-(4-prop-2-enoxyphenyl)methanolate —— C28H26N2O6
    [2-(2,3-Dimethoxyphenyl)-4,5-dioxo-1-(pyridin-1-ium-3-ylmethyl)pyrrolidin-3-ylidene]-(4-prop-2-enoxyphenyl)methanolate
    —— 5-(3-Ethoxy-4-prop-2-enoxyphenyl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-1-[5-[(4-methylphenyl)methylsulfanyl]-1,3,4-thiadiazol-2-yl]pyrrolidine-2,3-dione —— C35H33N3O6S2
    5-(3-Ethoxy-4-prop-2-enoxyphenyl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-1-[5-[(4-methylphenyl)methylsulfanyl]-1,3,4-thiadiazol-2-yl]pyrrolidine-2,3-dione
    —— (3S)-N-(2-aminoethyl)-1-(furan-2-ylmethyl)-5-oxopyrrolidine-3-carboxamide —— C12H17N3O3
    (3S)-N-(2-aminoethyl)-1-(furan-2-ylmethyl)-5-oxopyrrolidine-3-carboxamide
    —— 4-[5-(2-methylphenyl)-2-(3-nitrophenyl)-4,6-dioxohexahydro-2H-pyrrolo[3,4-d][1,2]oxazol-3-yl]phenyl benzenesulfonate —— C30H23N3O8S
    4-[5-(2-methylphenyl)-2-(3-nitrophenyl)-4,6-dioxohexahydro-2H-pyrrolo[3,4-d][1,2]oxazol-3-yl]phenyl benzenesulfonate
    —— Prop-2-enyl 2-[2-(3-chlorophenyl)-3-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-4,5-dioxopyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate —— C28H23ClN2O6S
    Prop-2-enyl 2-[2-(3-chlorophenyl)-3-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-4,5-dioxopyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate
    —— 1-[5-[(2-Chlorophenyl)methylsulfanyl]-1,3,4-thiadiazol-2-yl]-5-(3-ethoxy-4-propoxyphenyl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]pyrrolidine-2,3-dione —— C34H32ClN3O6S2
    1-[5-[(2-Chlorophenyl)methylsulfanyl]-1,3,4-thiadiazol-2-yl]-5-(3-ethoxy-4-propoxyphenyl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]pyrrolidine-2,3-dione
    —— (3R)-N-(2-aminoethyl)-1-(furan-2-ylmethyl)-5-oxopyrrolidine-3-carboxamide —— C12H17N3O3
    (3R)-N-(2-aminoethyl)-1-(furan-2-ylmethyl)-5-oxopyrrolidine-3-carboxamide
    —— 3-(4-butoxy-3-ethoxyphenyl)-5-(4-butoxyphenyl)-2-phenyldihydro-2H-pyrrolo[3,4-d][1,2]oxazole-4,6(3H,5H)-dione —— C33H38N2O6
    3-(4-butoxy-3-ethoxyphenyl)-5-(4-butoxyphenyl)-2-phenyldihydro-2H-pyrrolo[3,4-d][1,2]oxazole-4,6(3H,5H)-dione
    —— 2-[(3R)-3-(4-fluorophenyl)-2,5-dioxopyrrolidin-1-yl]acetic acid —— C12H10FNO4
    2-[(3R)-3-(4-fluorophenyl)-2,5-dioxopyrrolidin-1-yl]acetic acid
    —— 4-[2,3-Dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-(6-ethoxy-1,3-benzothiazol-2-yl)-5-(4-propoxyphenyl)pyrrolidine-2,3-dione —— C31H28N2O7S
    4-[2,3-Dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-(6-ethoxy-1,3-benzothiazol-2-yl)-5-(4-propoxyphenyl)pyrrolidine-2,3-dione
    —— 1-(6-Ethoxy-1,3-benzothiazol-2-yl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-5-[3-methoxy-4-(3-methylbutoxy)phenyl]pyrrolidine-2,3-dione —— C35H36N2O7S
    1-(6-Ethoxy-1,3-benzothiazol-2-yl)-4-[hydroxy-(2-methyl-2,3-dihydro-1-benzofuran-5-yl)methylidene]-5-[3-methoxy-4-(3-methylbutoxy)phenyl]pyrrolidine-2,3-dione
    —— Benzyl 1-oxo-2-[3-(trifluoromethyl)phenyl]-1,2,3,6,7,7a-hexahydro-3a,6-epoxyisoindole-7-carboxylate —— C23H18F3NO4
    Benzyl 1-oxo-2-[3-(trifluoromethyl)phenyl]-1,2,3,6,7,7a-hexahydro-3a,6-epoxyisoindole-7-carboxylate
    —— Ethyl 2-[2-(4-hydroxy-3-methoxyphenyl)-3-[hydroxy-(3-methyl-4-phenylmethoxyphenyl)methylidene]-4,5-dioxopyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate —— C33H30N2O8S
    Ethyl 2-[2-(4-hydroxy-3-methoxyphenyl)-3-[hydroxy-(3-methyl-4-phenylmethoxyphenyl)methylidene]-4,5-dioxopyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate