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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
    —— (4R,5S)-4-(3-methoxyphenyl)-2-(4-methylthiadiazole-5-carbonyl)-2,6-diazaspiro[4.6]undecan-7-one —— C20H24N4O3S
    (4R,5S)-4-(3-methoxyphenyl)-2-(4-methylthiadiazole-5-carbonyl)-2,6-diazaspiro[4.6]undecan-7-one
    —— [(2S)-2-(3,4-dimethoxyphenyl)pyrrolidin-1-yl]-[(3S)-6-methoxy-3,4-dihydro-2H-chromen-3-yl]methanone —— C23H27NO5
    [(2S)-2-(3,4-dimethoxyphenyl)pyrrolidin-1-yl]-[(3S)-6-methoxy-3,4-dihydro-2H-chromen-3-yl]methanone
    —— 2-cyclopentyl-1-[(2R)-2-[5-(4-methyl-1,3-thiazol-5-yl)-1,3,4-oxadiazol-2-yl]pyrrolidin-1-yl]ethanone —— C17H22N4O2S
    2-cyclopentyl-1-[(2R)-2-[5-(4-methyl-1,3-thiazol-5-yl)-1,3,4-oxadiazol-2-yl]pyrrolidin-1-yl]ethanone
    —— 1-[(2R)-2-[5-(4-methyl-1,3-thiazol-5-yl)-1,3,4-oxadiazol-2-yl]pyrrolidin-1-yl]-3-phenylpropan-1-one —— C19H20N4O2S
    1-[(2R)-2-[5-(4-methyl-1,3-thiazol-5-yl)-1,3,4-oxadiazol-2-yl]pyrrolidin-1-yl]-3-phenylpropan-1-one
    —— (4R,5S)-2-[2-(3,4-dimethoxyphenyl)acetyl]-4-(2-fluorophenyl)-2,6-diazaspiro[4.5]decan-7-one —— C24H27FN2O4
    (4R,5S)-2-[2-(3,4-dimethoxyphenyl)acetyl]-4-(2-fluorophenyl)-2,6-diazaspiro[4.5]decan-7-one
    —— [(3R,3aR,7aS)-3-(4-methoxyphenyl)-1-methylsulfonyl-3,3a,4,6,7,7a-hexahydro-2H-pyrrolo[3,2-c]pyridin-5-yl]-(4-methyl-1,3-thiazol-5-yl)methanone —— C20H25N3O4S2
    [(3R,3aR,7aS)-3-(4-methoxyphenyl)-1-methylsulfonyl-3,3a,4,6,7,7a-hexahydro-2H-pyrrolo[3,2-c]pyridin-5-yl]-(4-methyl-1,3-thiazol-5-yl)methanone
    —— (3S,3aR,7aR)-3-(3,4-dimethoxyphenyl)-2,3,3a,4,5,6,7,7a-octahydro-1H-indole —— C16H23NO2
    (3S,3aR,7aR)-3-(3,4-dimethoxyphenyl)-2,3,3a,4,5,6,7,7a-octahydro-1H-indole
    —— (4R,5S)-2-[[4-methoxy-3-(morpholin-4-ylmethyl)phenyl]methyl]-4-phenyl-2,6-diazaspiro[4.5]decan-7-one —— C27H35N3O3
    (4R,5S)-2-[[4-methoxy-3-(morpholin-4-ylmethyl)phenyl]methyl]-4-phenyl-2,6-diazaspiro[4.5]decan-7-one
    —— (4E)-1-[3-(diethylamino)propyl]-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-hydroxyphenyl)pyrrolidine-2,3-dione —— C27H32N4O4
    (4E)-1-[3-(diethylamino)propyl]-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-hydroxyphenyl)pyrrolidine-2,3-dione
    —— (4E)-5-(3-butoxyphenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione —— C30H30N4O4
    (4E)-5-(3-butoxyphenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-hydroxy-3-methoxyphenyl)-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione —— C27H24N4O5
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-hydroxy-3-methoxyphenyl)-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-fluorophenyl)-1-(furan-2-ylmethyl)pyrrolidine-2,3-dione —— C25H20FN3O4
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-fluorophenyl)-1-(furan-2-ylmethyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(3-imidazol-1-ylpropyl)-5-(4-nitrophenyl)pyrrolidine-2,3-dione —— C26H24N6O5
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(3-imidazol-1-ylpropyl)-5-(4-nitrophenyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(3-ethoxy-4-hydroxyphenyl)-1-(2-phenylethyl)pyrrolidine-2,3-dione —— C30H29N3O5
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(3-ethoxy-4-hydroxyphenyl)-1-(2-phenylethyl)pyrrolidine-2,3-dione
    —— (4R,5S)-2-[(3,4-dimethoxyphenyl)methyl]-4-(3-fluorophenyl)-10-oxa-2,6-diazaspiro[4.6]undecan-7-one —— C23H27FN2O4
    (4R,5S)-2-[(3,4-dimethoxyphenyl)methyl]-4-(3-fluorophenyl)-10-oxa-2,6-diazaspiro[4.6]undecan-7-one
    —— (4E)-5-(4-chlorophenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione —— C26H21ClN4O3
    (4E)-5-(4-chlorophenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(3-imidazol-1-ylpropyl)-5-[3-(3-methylbutoxy)phenyl]pyrrolidine-2,3-dione —— C31H35N5O4
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(3-imidazol-1-ylpropyl)-5-[3-(3-methylbutoxy)phenyl]pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(2-phenylethyl)-5-(4-propoxyphenyl)pyrrolidine-2,3-dione —— C31H31N3O4
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(2-phenylethyl)-5-(4-propoxyphenyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(2-morpholin-4-ylethyl)-5-(3-propoxyphenyl)pyrrolidine-2,3-dione —— C29H34N4O5
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(2-morpholin-4-ylethyl)-5-(3-propoxyphenyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(3-imidazol-1-ylpropyl)-5-(3,4,5-trimethoxyphenyl)pyrrolidine-2,3-dione —— C29H31N5O6
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(3-imidazol-1-ylpropyl)-5-(3,4,5-trimethoxyphenyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(3-imidazol-1-ylpropyl)-5-(3-prop-2-enoxyphenyl)pyrrolidine-2,3-dione —— C29H29N5O4
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(3-imidazol-1-ylpropyl)-5-(3-prop-2-enoxyphenyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(2-fluorophenyl)-1-(2-methoxyethyl)pyrrolidine-2,3-dione —— C23H22FN3O4
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(2-fluorophenyl)-1-(2-methoxyethyl)pyrrolidine-2,3-dione
    —— [(3S,3aR,7aR)-3-(3-methoxyphenyl)-2,3,3a,4,5,6,7,7a-octahydropyrrolo[3,2-b]pyridin-1-yl]-(2,4-dimethyl-1,3-thiazol-5-yl)methanone —— C20H25N3O2S
    [(3S,3aR,7aR)-3-(3-methoxyphenyl)-2,3,3a,4,5,6,7,7a-octahydropyrrolo[3,2-b]pyridin-1-yl]-(2,4-dimethyl-1,3-thiazol-5-yl)methanone
    —— (4E)-5-(4-bromophenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(3-imidazol-1-ylpropyl)pyrrolidine-2,3-dione —— C26H24BrN5O3
    (4E)-5-(4-bromophenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(3-imidazol-1-ylpropyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(2-fluorophenyl)-1-(3-imidazol-1-ylpropyl)pyrrolidine-2,3-dione —— C26H24FN5O3
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(2-fluorophenyl)-1-(3-imidazol-1-ylpropyl)pyrrolidine-2,3-dione
    —— (4E)-5-(3-chlorophenyl)-1-[3-(diethylamino)propyl]-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]pyrrolidine-2,3-dione —— C27H31ClN4O3
    (4E)-5-(3-chlorophenyl)-1-[3-(diethylamino)propyl]-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]pyrrolidine-2,3-dione
    —— [(3S,3aS,7aR)-3-(4-fluorophenyl)-5-(4-methyl-1,3-thiazole-5-carbonyl)-3,3a,4,6,7,7a-hexahydro-2H-pyrrolo[3,2-c]pyridin-1-yl]-phenylmethanone —— C25H24FN3O2S
    [(3S,3aS,7aR)-3-(4-fluorophenyl)-5-(4-methyl-1,3-thiazole-5-carbonyl)-3,3a,4,6,7,7a-hexahydro-2H-pyrrolo[3,2-c]pyridin-1-yl]-phenylmethanone
    —— (4E)-5-(3-chlorophenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione —— C26H21ClN4O3
    (4E)-5-(3-chlorophenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione
    —— (4E)-1-[2-(diethylamino)ethyl]-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(3-nitrophenyl)pyrrolidine-2,3-dione —— C26H29N5O5
    (4E)-1-[2-(diethylamino)ethyl]-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(3-nitrophenyl)pyrrolidine-2,3-dione
    —— (4E)-5-(4-butoxy-3-methoxyphenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione —— C31H32N4O5
    (4E)-5-(4-butoxy-3-methoxyphenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-ethylphenyl)-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione —— C28H26N4O3
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-ethylphenyl)-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(furan-2-ylmethyl)-5-(3-propoxyphenyl)pyrrolidine-2,3-dione —— C28H27N3O5
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(furan-2-ylmethyl)-5-(3-propoxyphenyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(pyridin-3-ylmethyl)-5-(3,4,5-trimethoxyphenyl)pyrrolidine-2,3-dione —— C29H28N4O6
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(pyridin-3-ylmethyl)-5-(3,4,5-trimethoxyphenyl)pyrrolidine-2,3-dione
    —— (4E)-1-[2-(diethylamino)ethyl]-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-ethoxy-3-methoxyphenyl)pyrrolidine-2,3-dione —— C29H36N4O5
    (4E)-1-[2-(diethylamino)ethyl]-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-ethoxy-3-methoxyphenyl)pyrrolidine-2,3-dione
    —— (4R,5S)-4-(2,6-difluorophenyl)-2-[(3,4-dimethoxyphenyl)methyl]-10-oxa-2,6-diazaspiro[4.6]undecan-7-one —— C23H26F2N2O4
    (4R,5S)-4-(2,6-difluorophenyl)-2-[(3,4-dimethoxyphenyl)methyl]-10-oxa-2,6-diazaspiro[4.6]undecan-7-one
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(3-ethoxy-4-prop-2-enoxyphenyl)-1-(furan-2-ylmethyl)pyrrolidine-2,3-dione —— C30H29N3O6
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(3-ethoxy-4-prop-2-enoxyphenyl)-1-(furan-2-ylmethyl)pyrrolidine-2,3-dione
    —— methyl 4-[(3E)-3-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-4,5-dioxo-1-(pyridin-3-ylmethyl)pyrrolidin-2-yl]benzoate —— C28H24N4O5
    methyl 4-[(3E)-3-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-4,5-dioxo-1-(pyridin-3-ylmethyl)pyrrolidin-2-yl]benzoate
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(3-imidazol-1-ylpropyl)-5-(4-pentoxyphenyl)pyrrolidine-2,3-dione —— C31H35N5O4
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(3-imidazol-1-ylpropyl)-5-(4-pentoxyphenyl)pyrrolidine-2,3-dione
    —— (4E)-1-[3-(diethylamino)propyl]-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(3-ethoxy-4-hydroxyphenyl)pyrrolidine-2,3-dione —— C29H36N4O5
    (4E)-1-[3-(diethylamino)propyl]-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(3-ethoxy-4-hydroxyphenyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(3-imidazol-1-ylpropyl)-5-(4-propoxyphenyl)pyrrolidine-2,3-dione —— C29H31N5O4
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(3-imidazol-1-ylpropyl)-5-(4-propoxyphenyl)pyrrolidine-2,3-dione
    —— (4E)-5-(4-butoxy-3-ethoxyphenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(furan-2-ylmethyl)pyrrolidine-2,3-dione —— C31H33N3O6
    (4E)-5-(4-butoxy-3-ethoxyphenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(furan-2-ylmethyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-hydroxyphenyl)-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione —— C26H22N4O4
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-hydroxyphenyl)-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione
    —— (3S,3aR,7aS)-3-(3,4-dimethoxyphenyl)-2,3,3a,4,5,6,7,7a-octahydro-1H-indole —— C16H23NO2
    (3S,3aR,7aS)-3-(3,4-dimethoxyphenyl)-2,3,3a,4,5,6,7,7a-octahydro-1H-indole
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(furan-2-ylmethyl)-5-(4-phenylmethoxyphenyl)pyrrolidine-2,3-dione —— C32H27N3O5
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(furan-2-ylmethyl)-5-(4-phenylmethoxyphenyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(3-ethoxy-4-hydroxyphenyl)-1-(6-methyl-1,3-benzothiazol-2-yl)pyrrolidine-2,3-dione —— C30H26N4O5S
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(3-ethoxy-4-hydroxyphenyl)-1-(6-methyl-1,3-benzothiazol-2-yl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(3-propoxyphenyl)-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione —— C29H28N4O4
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(3-propoxyphenyl)-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione
    —— (4E)-1-[2-(diethylamino)ethyl]-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-phenylmethoxyphenyl)pyrrolidine-2,3-dione —— C33H36N4O4
    (4E)-1-[2-(diethylamino)ethyl]-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-phenylmethoxyphenyl)pyrrolidine-2,3-dione
    —— (4E)-5-(3-chlorophenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(furan-2-ylmethyl)pyrrolidine-2,3-dione —— C25H20ClN3O4
    (4E)-5-(3-chlorophenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(furan-2-ylmethyl)pyrrolidine-2,3-dione
    —— (4E)-5-(4-butoxy-3-methoxyphenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(furan-2-ylmethyl)pyrrolidine-2,3-dione —— C30H31N3O6
    (4E)-5-(4-butoxy-3-methoxyphenyl)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-1-(furan-2-ylmethyl)pyrrolidine-2,3-dione
    —— (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-hydroxyphenyl)-1-(2-phenylethyl)pyrrolidine-2,3-dione —— C28H25N3O4
    (4E)-4-[(3,8-dimethylimidazo[1,2-a]pyridin-2-yl)-hydroxymethylidene]-5-(4-hydroxyphenyl)-1-(2-phenylethyl)pyrrolidine-2,3-dione