摩熵化学
数据库官网
小程序
打开微信扫一扫
首页 分子通 化学资讯 化学百科 反应查询 关于我们
请输入关键词
历史搜索
    热门化合物HOT
    • 喹啉
    • 水杨醛
    • 二溴甲烷
    • 谷胱甘肽
    • L-乳酸
    • 苯巴比妥
    • 辣椒碱
    • 非那明
    • 百草枯
    • 联苯烯
    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
    —— (4Z,5R)-4-[(4-ethoxyphenyl)-hydroxymethylidene]-1-(6-ethyl-1,3-benzothiazol-2-yl)-5-(2-methoxyphenyl)pyrrolidine-2,3-dione —— C29H26N2O5S
    (4Z,5R)-4-[(4-ethoxyphenyl)-hydroxymethylidene]-1-(6-ethyl-1,3-benzothiazol-2-yl)-5-(2-methoxyphenyl)pyrrolidine-2,3-dione
    —— 4-[(4Z,5S)-4-[(4-chlorophenyl)-hydroxymethylidene]-2,3-dioxo-5-phenylpyrrolidin-1-yl]benzenesulfonamide —— C23H17ClN2O5S
    4-[(4Z,5S)-4-[(4-chlorophenyl)-hydroxymethylidene]-2,3-dioxo-5-phenylpyrrolidin-1-yl]benzenesulfonamide
    —— (4Z,5R)-4-[hydroxy-(4-propoxyphenyl)methylidene]-5-[3-methoxy-4-(3-methylbutoxy)phenyl]-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione —— C30H34N2O7
    (4Z,5R)-4-[hydroxy-(4-propoxyphenyl)methylidene]-5-[3-methoxy-4-(3-methylbutoxy)phenyl]-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione
    —— (4Z,5S)-5-(2,5-dimethoxyphenyl)-1-[2-(dimethylamino)ethyl]-4-[hydroxy-(3-methoxyphenyl)methylidene]pyrrolidine-2,3-dione —— C24H28N2O6
    (4Z,5S)-5-(2,5-dimethoxyphenyl)-1-[2-(dimethylamino)ethyl]-4-[hydroxy-(3-methoxyphenyl)methylidene]pyrrolidine-2,3-dione
    —— (1S,3R,3aS,6aS)-5-(3-chlorophenyl)-1-ethyl-1'-(naphthalen-1-ylmethyl)spiro[1,2,3a,6a-tetrahydropyrrolo[3,4-c]pyrrole-3,3'-indole]-2',4,6-trione —— C32H26ClN3O3
    (1S,3R,3aS,6aS)-5-(3-chlorophenyl)-1-ethyl-1'-(naphthalen-1-ylmethyl)spiro[1,2,3a,6a-tetrahydropyrrolo[3,4-c]pyrrole-3,3'-indole]-2',4,6-trione
    —— (4Z,5S)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-(6-methoxy-1,3-benzothiazol-2-yl)-5-(3-methoxy-4-pentoxyphenyl)pyrrolidine-2,3-dione —— C33H32N2O8S
    (4Z,5S)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-(6-methoxy-1,3-benzothiazol-2-yl)-5-(3-methoxy-4-pentoxyphenyl)pyrrolidine-2,3-dione
    —— (4Z,5R)-4-[(4-chlorophenyl)-hydroxymethylidene]-5-(2,4-dimethoxyphenyl)-1-(furan-2-ylmethyl)pyrrolidine-2,3-dione —— C24H20ClNO6
    (4Z,5R)-4-[(4-chlorophenyl)-hydroxymethylidene]-5-(2,4-dimethoxyphenyl)-1-(furan-2-ylmethyl)pyrrolidine-2,3-dione
    —— (4Z,5S)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-(furan-2-ylmethyl)-5-(4-methoxyphenyl)pyrrolidine-2,3-dione —— C25H21NO7
    (4Z,5S)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-(furan-2-ylmethyl)-5-(4-methoxyphenyl)pyrrolidine-2,3-dione
    —— (4Z,5S)-4-[hydroxy-(3-methoxyphenyl)methylidene]-5-(4-methoxyphenyl)-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione —— C23H20N2O6
    (4Z,5S)-4-[hydroxy-(3-methoxyphenyl)methylidene]-5-(4-methoxyphenyl)-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione
    —— (4Z,5S)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-[2-(dimethylamino)ethyl]-5-(3-methoxy-4-propoxyphenyl)pyrrolidine-2,3-dione —— C27H32N2O7
    (4Z,5S)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-[2-(dimethylamino)ethyl]-5-(3-methoxy-4-propoxyphenyl)pyrrolidine-2,3-dione
    —— (4E,5R)-4-[(4-butoxy-2-methylphenyl)-hydroxymethylidene]-1-[3-(dimethylamino)propyl]-5-phenylpyrrolidine-2,3-dione —— C27H34N2O4
    (4E,5R)-4-[(4-butoxy-2-methylphenyl)-hydroxymethylidene]-1-[3-(dimethylamino)propyl]-5-phenylpyrrolidine-2,3-dione
    —— (4Z,5R)-4-[hydroxy-(4-propoxyphenyl)methylidene]-5-(3-methoxyphenyl)-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione —— C25H24N2O6
    (4Z,5R)-4-[hydroxy-(4-propoxyphenyl)methylidene]-5-(3-methoxyphenyl)-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione
    —— (4Z,5S)-4-[(4-chlorophenyl)-hydroxymethylidene]-5-(2,4-dimethoxyphenyl)-1-(furan-2-ylmethyl)pyrrolidine-2,3-dione —— C24H20ClNO6
    (4Z,5S)-4-[(4-chlorophenyl)-hydroxymethylidene]-5-(2,4-dimethoxyphenyl)-1-(furan-2-ylmethyl)pyrrolidine-2,3-dione
    —— (4E,5R)-4-[(4-butoxy-2-methylphenyl)-hydroxymethylidene]-1-[3-(dimethylamino)propyl]-5-(4-methylphenyl)pyrrolidine-2,3-dione —— C28H36N2O4
    (4E,5R)-4-[(4-butoxy-2-methylphenyl)-hydroxymethylidene]-1-[3-(dimethylamino)propyl]-5-(4-methylphenyl)pyrrolidine-2,3-dione
    —— (4Z,5S)-1-(5-acetyl-4-methyl-1,3-thiazol-2-yl)-5-(3,4-diethoxyphenyl)-4-[hydroxy-[(2S)-2-methyl-2,3-dihydro-1-benzofuran-5-yl]methylidene]pyrrolidine-2,3-dione —— C30H30N2O7S
    (4Z,5S)-1-(5-acetyl-4-methyl-1,3-thiazol-2-yl)-5-(3,4-diethoxyphenyl)-4-[hydroxy-[(2S)-2-methyl-2,3-dihydro-1-benzofuran-5-yl]methylidene]pyrrolidine-2,3-dione
    —— (4Z,5S)-5-[4-(dimethylamino)phenyl]-4-[hydroxy-[4-[(3-methylphenyl)methoxy]phenyl]methylidene]-1-(pyridin-4-ylmethyl)pyrrolidine-2,3-dione —— C33H31N3O4
    (4Z,5S)-5-[4-(dimethylamino)phenyl]-4-[hydroxy-[4-[(3-methylphenyl)methoxy]phenyl]methylidene]-1-(pyridin-4-ylmethyl)pyrrolidine-2,3-dione
    —— (4E,5R)-4-[(4-butoxy-2-methylphenyl)-hydroxymethylidene]-5-(4-hydroxyphenyl)-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione —— C28H28N2O5
    (4E,5R)-4-[(4-butoxy-2-methylphenyl)-hydroxymethylidene]-5-(4-hydroxyphenyl)-1-(pyridin-3-ylmethyl)pyrrolidine-2,3-dione
    —— (4Z,5S)-1-hexadecyl-4-[hydroxy-(4-methoxyphenyl)methylidene]-5-(4-methoxyphenyl)pyrrolidine-2,3-dione —— C35H49NO5
    (4Z,5S)-1-hexadecyl-4-[hydroxy-(4-methoxyphenyl)methylidene]-5-(4-methoxyphenyl)pyrrolidine-2,3-dione
    —— (4Z,5R)-1-[2-(2-hydroxyethoxy)ethyl]-5-(4-hydroxy-3-methoxyphenyl)-4-[hydroxy-(3-nitrophenyl)methylidene]pyrrolidine-2,3-dione —— C22H22N2O9
    (4Z,5R)-1-[2-(2-hydroxyethoxy)ethyl]-5-(4-hydroxy-3-methoxyphenyl)-4-[hydroxy-(3-nitrophenyl)methylidene]pyrrolidine-2,3-dione
    —— (4Z,5R)-5-(2,5-dimethoxyphenyl)-1-[2-(dimethylamino)ethyl]-4-[hydroxy-(3-methoxyphenyl)methylidene]pyrrolidine-2,3-dione —— C24H28N2O6
    (4Z,5R)-5-(2,5-dimethoxyphenyl)-1-[2-(dimethylamino)ethyl]-4-[hydroxy-(3-methoxyphenyl)methylidene]pyrrolidine-2,3-dione
    —— (4Z,5R)-5-(4-chlorophenyl)-1-[2-(2-hydroxyethoxy)ethyl]-4-[hydroxy-(3-nitrophenyl)methylidene]pyrrolidine-2,3-dione —— C21H19ClN2O7
    (4Z,5R)-5-(4-chlorophenyl)-1-[2-(2-hydroxyethoxy)ethyl]-4-[hydroxy-(3-nitrophenyl)methylidene]pyrrolidine-2,3-dione
    —— (4Z,5R)-5-(4-ethoxyphenyl)-1-[2-(2-hydroxyethoxy)ethyl]-4-[hydroxy-(3-nitrophenyl)methylidene]pyrrolidine-2,3-dione —— C23H24N2O8
    (4Z,5R)-5-(4-ethoxyphenyl)-1-[2-(2-hydroxyethoxy)ethyl]-4-[hydroxy-(3-nitrophenyl)methylidene]pyrrolidine-2,3-dione
    —— (4Z,5R)-5-[3-ethoxy-4-(3-methylbutoxy)phenyl]-4-[hydroxy-[(2S)-2-methyl-2,3-dihydro-1-benzofuran-5-yl]methylidene]-1-(pyridin-4-ylmethyl)pyrrolidine-2,3-dione —— C33H36N2O6
    (4Z,5R)-5-[3-ethoxy-4-(3-methylbutoxy)phenyl]-4-[hydroxy-[(2S)-2-methyl-2,3-dihydro-1-benzofuran-5-yl]methylidene]-1-(pyridin-4-ylmethyl)pyrrolidine-2,3-dione
    —— (4Z,5R)-4-[(4-chlorophenyl)-hydroxymethylidene]-1-(furan-2-ylmethyl)-5-(4-hydroxy-3-methoxyphenyl)pyrrolidine-2,3-dione —— C23H18ClNO6
    (4Z,5R)-4-[(4-chlorophenyl)-hydroxymethylidene]-1-(furan-2-ylmethyl)-5-(4-hydroxy-3-methoxyphenyl)pyrrolidine-2,3-dione
    —— (4Z,5S)-5-(3-fluorophenyl)-4-[(4-fluorophenyl)-hydroxymethylidene]-1-(3-morpholin-4-ylpropyl)pyrrolidine-2,3-dione —— C24H24F2N2O4
    (4Z,5S)-5-(3-fluorophenyl)-4-[(4-fluorophenyl)-hydroxymethylidene]-1-(3-morpholin-4-ylpropyl)pyrrolidine-2,3-dione
    —— (4Z,5R)-1-(6-chloro-1,3-benzothiazol-2-yl)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-5-[3-(3-methylbutoxy)phenyl]pyrrolidine-2,3-dione —— C31H27ClN2O6S
    (4Z,5R)-1-(6-chloro-1,3-benzothiazol-2-yl)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-5-[3-(3-methylbutoxy)phenyl]pyrrolidine-2,3-dione
    —— (4Z,5S)-4-[(4-chlorophenyl)-hydroxymethylidene]-1-hexadecyl-5-(4-nitrophenyl)pyrrolidine-2,3-dione —— C33H43ClN2O5
    (4Z,5S)-4-[(4-chlorophenyl)-hydroxymethylidene]-1-hexadecyl-5-(4-nitrophenyl)pyrrolidine-2,3-dione
    —— (4Z,5S)-4-[(4-ethoxyphenyl)-hydroxymethylidene]-1-(6-ethyl-1,3-benzothiazol-2-yl)-5-(2-methoxyphenyl)pyrrolidine-2,3-dione —— C29H26N2O5S
    (4Z,5S)-4-[(4-ethoxyphenyl)-hydroxymethylidene]-1-(6-ethyl-1,3-benzothiazol-2-yl)-5-(2-methoxyphenyl)pyrrolidine-2,3-dione
    —— 4-[(4Z,5R)-4-[(4-chlorophenyl)-hydroxymethylidene]-2,3-dioxo-5-phenylpyrrolidin-1-yl]benzenesulfonamide —— C23H17ClN2O5S
    4-[(4Z,5R)-4-[(4-chlorophenyl)-hydroxymethylidene]-2,3-dioxo-5-phenylpyrrolidin-1-yl]benzenesulfonamide
    —— (4Z,5R)-4-[hydroxy-(3-methoxyphenyl)methylidene]-5-(4-methoxyphenyl)-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione —— C23H20N2O6
    (4Z,5R)-4-[hydroxy-(3-methoxyphenyl)methylidene]-5-(4-methoxyphenyl)-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione
    —— methyl 2-[(2S,3Z)-2-(4-hydroxy-3-methoxyphenyl)-3-[hydroxy-(3-methoxyphenyl)methylidene]-4,5-dioxopyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate —— C25H22N2O8S
    methyl 2-[(2S,3Z)-2-(4-hydroxy-3-methoxyphenyl)-3-[hydroxy-(3-methoxyphenyl)methylidene]-4,5-dioxopyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate
    —— (4Z,5R)-4-[(4-ethoxyphenyl)-hydroxymethylidene]-1-[2-(2-hydroxyethoxy)ethyl]-5-(4-methylphenyl)pyrrolidine-2,3-dione —— C24H27NO6
    (4Z,5R)-4-[(4-ethoxyphenyl)-hydroxymethylidene]-1-[2-(2-hydroxyethoxy)ethyl]-5-(4-methylphenyl)pyrrolidine-2,3-dione
    —— (4Z,5S)-1-[2-(2-hydroxyethoxy)ethyl]-5-(4-hydroxy-3-methoxyphenyl)-4-[hydroxy-(3-nitrophenyl)methylidene]pyrrolidine-2,3-dione —— C22H22N2O9
    (4Z,5S)-1-[2-(2-hydroxyethoxy)ethyl]-5-(4-hydroxy-3-methoxyphenyl)-4-[hydroxy-(3-nitrophenyl)methylidene]pyrrolidine-2,3-dione
    —— (4Z,5R)-4-[(4-ethoxyphenyl)-hydroxymethylidene]-1-[2-(2-hydroxyethoxy)ethyl]-5-(3-methoxyphenyl)pyrrolidine-2,3-dione —— C24H27NO7
    (4Z,5R)-4-[(4-ethoxyphenyl)-hydroxymethylidene]-1-[2-(2-hydroxyethoxy)ethyl]-5-(3-methoxyphenyl)pyrrolidine-2,3-dione
    —— (4Z,5R)-1-(4,6-dimethyl-1,3-benzothiazol-2-yl)-5-(3-ethoxy-4-hydroxyphenyl)-4-[hydroxy-(3-methoxyphenyl)methylidene]pyrrolidine-2,3-dione —— C29H26N2O6S
    (4Z,5R)-1-(4,6-dimethyl-1,3-benzothiazol-2-yl)-5-(3-ethoxy-4-hydroxyphenyl)-4-[hydroxy-(3-methoxyphenyl)methylidene]pyrrolidine-2,3-dione
    —— (4Z,5R)-5-(4-ethoxyphenyl)-1-[2-(2-hydroxyethoxy)ethyl]-4-[hydroxy-(4-nitrophenyl)methylidene]pyrrolidine-2,3-dione —— C23H24N2O8
    (4Z,5R)-5-(4-ethoxyphenyl)-1-[2-(2-hydroxyethoxy)ethyl]-4-[hydroxy-(4-nitrophenyl)methylidene]pyrrolidine-2,3-dione
    —— methyl 2-[(2S,3Z)-2-(4-ethoxy-3-methoxyphenyl)-3-[hydroxy-(4-methoxy-2-methylphenyl)methylidene]-4,5-dioxopyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate —— C28H28N2O8S
    methyl 2-[(2S,3Z)-2-(4-ethoxy-3-methoxyphenyl)-3-[hydroxy-(4-methoxy-2-methylphenyl)methylidene]-4,5-dioxopyrrolidin-1-yl]-4-methyl-1,3-thiazole-5-carboxylate
    —— (4Z,5R)-5-(4-fluorophenyl)-4-[hydroxy-[4-(2-methylpropoxy)phenyl]methylidene]-1-(2-morpholin-4-ylethyl)pyrrolidine-2,3-dione —— C27H31FN2O5
    (4Z,5R)-5-(4-fluorophenyl)-4-[hydroxy-[4-(2-methylpropoxy)phenyl]methylidene]-1-(2-morpholin-4-ylethyl)pyrrolidine-2,3-dione
    —— (4Z,5S)-5-(3-chlorophenyl)-4-[hydroxy-(4-methoxyphenyl)methylidene]-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione —— C22H17ClN2O5
    (4Z,5S)-5-(3-chlorophenyl)-4-[hydroxy-(4-methoxyphenyl)methylidene]-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione
    —— (4Z,5S)-4-[hydroxy-(4-methylphenyl)methylidene]-5-(4-methoxyphenyl)-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione —— C23H20N2O5
    (4Z,5S)-4-[hydroxy-(4-methylphenyl)methylidene]-5-(4-methoxyphenyl)-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione
    —— (4Z,5R)-4-[hydroxy-(4-methylphenyl)methylidene]-5-(4-methoxyphenyl)-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione —— C23H20N2O5
    (4Z,5R)-4-[hydroxy-(4-methylphenyl)methylidene]-5-(4-methoxyphenyl)-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione
    —— (4Z,5R)-5-(4-hydroxy-3-methoxyphenyl)-4-[hydroxy(phenyl)methylidene]-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione —— C22H18N2O6
    (4Z,5R)-5-(4-hydroxy-3-methoxyphenyl)-4-[hydroxy(phenyl)methylidene]-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione
    —— (4Z,5S)-1-(6-bromo-1,3-benzothiazol-2-yl)-5-(4-bromophenyl)-4-[hydroxy(phenyl)methylidene]pyrrolidine-2,3-dione —— C24H14Br2N2O3S
    (4Z,5S)-1-(6-bromo-1,3-benzothiazol-2-yl)-5-(4-bromophenyl)-4-[hydroxy(phenyl)methylidene]pyrrolidine-2,3-dione
    —— (4Z,5R)-1-(6-ethyl-1,3-benzothiazol-2-yl)-5-(2-fluorophenyl)-4-[hydroxy-(4-methylphenyl)methylidene]pyrrolidine-2,3-dione —— C27H21FN2O3S
    (4Z,5R)-1-(6-ethyl-1,3-benzothiazol-2-yl)-5-(2-fluorophenyl)-4-[hydroxy-(4-methylphenyl)methylidene]pyrrolidine-2,3-dione
    —— (4Z,5S)-4-[(4-ethoxyphenyl)-hydroxymethylidene]-1-[2-(2-hydroxyethoxy)ethyl]-5-(4-methylphenyl)pyrrolidine-2,3-dione —— C24H27NO6
    (4Z,5S)-4-[(4-ethoxyphenyl)-hydroxymethylidene]-1-[2-(2-hydroxyethoxy)ethyl]-5-(4-methylphenyl)pyrrolidine-2,3-dione
    —— (4Z,5R)-5-(3,4-dimethoxyphenyl)-1-(6-ethyl-1,3-benzothiazol-2-yl)-4-[hydroxy-(4-methoxyphenyl)methylidene]pyrrolidine-2,3-dione —— C29H26N2O6S
    (4Z,5R)-5-(3,4-dimethoxyphenyl)-1-(6-ethyl-1,3-benzothiazol-2-yl)-4-[hydroxy-(4-methoxyphenyl)methylidene]pyrrolidine-2,3-dione
    —— (4Z,5S)-5-(4-ethoxy-3-methoxyphenyl)-4-[hydroxy-(4-methoxy-3-methylphenyl)methylidene]-1-(6-methoxy-1,3-benzothiazol-2-yl)pyrrolidine-2,3-dione —— C30H28N2O7S
    (4Z,5S)-5-(4-ethoxy-3-methoxyphenyl)-4-[hydroxy-(4-methoxy-3-methylphenyl)methylidene]-1-(6-methoxy-1,3-benzothiazol-2-yl)pyrrolidine-2,3-dione
    —— (4Z,5S)-5-(3,4-dichlorophenyl)-4-[hydroxy-(4-methylphenyl)methylidene]-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione —— C22H16Cl2N2O4
    (4Z,5S)-5-(3,4-dichlorophenyl)-4-[hydroxy-(4-methylphenyl)methylidene]-1-(5-methyl-1,2-oxazol-3-yl)pyrrolidine-2,3-dione
    —— (4Z,5S)-5-(4-tert-butylphenyl)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-(6-ethoxy-1,3-benzothiazol-2-yl)pyrrolidine-2,3-dione —— C32H30N2O6S
    (4Z,5S)-5-(4-tert-butylphenyl)-4-[2,3-dihydro-1,4-benzodioxin-6-yl(hydroxy)methylidene]-1-(6-ethoxy-1,3-benzothiazol-2-yl)pyrrolidine-2,3-dione
    —— (4Z,5S)-4-[(4-ethoxyphenyl)-hydroxymethylidene]-5-(4-ethylphenyl)-1-[2-(2-hydroxyethoxy)ethyl]pyrrolidine-2,3-dione —— C25H29NO6
    (4Z,5S)-4-[(4-ethoxyphenyl)-hydroxymethylidene]-5-(4-ethylphenyl)-1-[2-(2-hydroxyethoxy)ethyl]pyrrolidine-2,3-dione