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

吡咯烷类

中文名称 英文名称 CAS号 化学式 结构式图片
—— (4S)-1-(4-bromophenyl)-4-[1-[2-(3,4-dihydro-2H-quinolin-1-yl)-2-oxoethyl]benzimidazol-2-yl]pyrrolidin-2-one —— C28H25BrN4O2
(4S)-1-(4-bromophenyl)-4-[1-[2-(3,4-dihydro-2H-quinolin-1-yl)-2-oxoethyl]benzimidazol-2-yl]pyrrolidin-2-one
—— (3aR,6aS)-5-(4-bromophenyl)-3-[2-[(3R)-3-(4-nitrophenyl)-5-phenyl-3,4-dihydropyrazol-2-yl]-2-oxoethyl]-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione —— C27H20BrN7O5
(3aR,6aS)-5-(4-bromophenyl)-3-[2-[(3R)-3-(4-nitrophenyl)-5-phenyl-3,4-dihydropyrazol-2-yl]-2-oxoethyl]-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione
—— (1R,8R,9S)-11-(4-bromophenyl)-8-[4-(2-morpholin-4-yl-2-oxoethoxy)phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C26H22BrN3O6S2
(1R,8R,9S)-11-(4-bromophenyl)-8-[4-(2-morpholin-4-yl-2-oxoethoxy)phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (4S)-1-(4-bromophenyl)-4-[1-[4-(5-methyl-2-propan-2-ylphenoxy)butyl]benzimidazol-2-yl]pyrrolidin-2-one —— C31H34BrN3O2
(4S)-1-(4-bromophenyl)-4-[1-[4-(5-methyl-2-propan-2-ylphenoxy)butyl]benzimidazol-2-yl]pyrrolidin-2-one
—— (3aR,6aS)-5-(4-bromophenyl)-3-[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione —— C19H13BrN6O3
(3aR,6aS)-5-(4-bromophenyl)-3-[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione
—— (3R,3aS,6aS)-5-(4-bromophenyl)-3-(4-chloro-2-oxo-3-phenyl-1,3-thiazol-5-yl)-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione —— C26H17BrClN3O4S
(3R,3aS,6aS)-5-(4-bromophenyl)-3-(4-chloro-2-oxo-3-phenyl-1,3-thiazol-5-yl)-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione
—— N-benzyl-2-[2-[(3S)-1-(4-bromophenyl)-5-oxopyrrolidin-3-yl]benzimidazol-1-yl]-N-propan-2-ylacetamide —— C29H29BrN4O2
N-benzyl-2-[2-[(3S)-1-(4-bromophenyl)-5-oxopyrrolidin-3-yl]benzimidazol-1-yl]-N-propan-2-ylacetamide
—— (3R)-1-(4-bromophenyl)-3-[(1R,5R)-1,3,3-trimethyl-6-azabicyclo[3.2.1]octan-6-yl]pyrrolidine-2,5-dione —— C20H25BrN2O2
(3R)-1-(4-bromophenyl)-3-[(1R,5R)-1,3,3-trimethyl-6-azabicyclo[3.2.1]octan-6-yl]pyrrolidine-2,5-dione
—— (3aR,6aS)-5-(4-bromophenyl)-3-[[3-(3,4-dimethylphenyl)-1,2,4-oxadiazol-5-yl]methyl]-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione —— C21H17BrN6O3
(3aR,6aS)-5-(4-bromophenyl)-3-[[3-(3,4-dimethylphenyl)-1,2,4-oxadiazol-5-yl]methyl]-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione
—— (3aR,6aS)-5-(4-bromophenyl)-3-[[3-(2-methylphenyl)-1,2,4-oxadiazol-5-yl]methyl]-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione —— C20H15BrN6O3
(3aR,6aS)-5-(4-bromophenyl)-3-[[3-(2-methylphenyl)-1,2,4-oxadiazol-5-yl]methyl]-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione
—— (1R,2S,9S,10R,11R,12R,16S)-14-(4-bromophenyl)-9-phenyl-3,7-dithia-5,14-diazapentacyclo[9.5.1.02,10.04,8.012,16]heptadec-4(8)-ene-6,13,15-trione —— C25H19BrN2O3S2
(1R,2S,9S,10R,11R,12R,16S)-14-(4-bromophenyl)-9-phenyl-3,7-dithia-5,14-diazapentacyclo[9.5.1.02,10.04,8.012,16]heptadec-4(8)-ene-6,13,15-trione
—— (1R,8R,9S)-11-(4-bromophenyl)-8-[3-(2-morpholin-4-yl-2-oxoethoxy)phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C26H22BrN3O6S2
(1R,8R,9S)-11-(4-bromophenyl)-8-[3-(2-morpholin-4-yl-2-oxoethoxy)phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (1R,2S,9R,10R,11R,12R,16S)-14-(4-bromophenyl)-9-thiophen-2-yl-3,7-dithia-5,14-diazapentacyclo[9.5.1.02,10.04,8.012,16]heptadec-4(8)-ene-6,13,15-trione —— C23H17BrN2O3S3
(1R,2S,9R,10R,11R,12R,16S)-14-(4-bromophenyl)-9-thiophen-2-yl-3,7-dithia-5,14-diazapentacyclo[9.5.1.02,10.04,8.012,16]heptadec-4(8)-ene-6,13,15-trione
—— (1R,8R,9S)-11-(4-bromophenyl)-8-(2-methylphenyl)-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C21H15BrN2O3S2
(1R,8R,9S)-11-(4-bromophenyl)-8-(2-methylphenyl)-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (3R,3aS,6aS)-3-(2-methoxyphenyl)-5-(4-nitrophenyl)-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione —— C24H19N3O6
(3R,3aS,6aS)-3-(2-methoxyphenyl)-5-(4-nitrophenyl)-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione
—— (3R)-3-(1,3-benzothiazol-2-ylsulfanyl)-1-(4-bromophenyl)pyrrolidine-2,5-dione —— C17H11BrN2O2S2
(3R)-3-(1,3-benzothiazol-2-ylsulfanyl)-1-(4-bromophenyl)pyrrolidine-2,5-dione
—— (1R,8R,9S)-11-(4-bromophenyl)-8-[4-[(3-methylphenyl)methoxy]phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C28H21BrN2O4S2
(1R,8R,9S)-11-(4-bromophenyl)-8-[4-[(3-methylphenyl)methoxy]phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (3S,3aS,6aS)-3-(2-methoxyphenyl)-5-(4-nitrophenyl)-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione —— C24H19N3O6
(3S,3aS,6aS)-3-(2-methoxyphenyl)-5-(4-nitrophenyl)-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione
—— benzyl (3aS,6aR)-5-(4-bromophenyl)-4,6-dioxo-3a,6a-dihydro-1H-pyrrolo[3,4-c]pyrazole-3-carboxylate —— C19H14BrN3O4
benzyl (3aS,6aR)-5-(4-bromophenyl)-4,6-dioxo-3a,6a-dihydro-1H-pyrrolo[3,4-c]pyrazole-3-carboxylate
—— (1R,8R,9S)-11-(4-bromophenyl)-8-[2-(2-oxo-2-piperidin-1-ylethoxy)phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C27H24BrN3O5S2
(1R,8R,9S)-11-(4-bromophenyl)-8-[2-(2-oxo-2-piperidin-1-ylethoxy)phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— [4-[(3R,3aR,6aR)-5-(4-bromophenyl)-4,6-dioxo-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazol-3-yl]phenyl] benzenesulfonate —— C29H21BrN2O6S
[4-[(3R,3aR,6aR)-5-(4-bromophenyl)-4,6-dioxo-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazol-3-yl]phenyl] benzenesulfonate
—— (3aS,6aR)-3-[[3-(1,3-benzodioxol-5-yl)-1,2,4-oxadiazol-5-yl]methyl]-5-(4-bromophenyl)-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione —— C20H13BrN6O5
(3aS,6aR)-3-[[3-(1,3-benzodioxol-5-yl)-1,2,4-oxadiazol-5-yl]methyl]-5-(4-bromophenyl)-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione
—— (3aS,6aS)-5-(4-bromophenyl)-3-[[3-(2-methylphenyl)-1,2,4-oxadiazol-5-yl]methyl]-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione —— C20H15BrN6O3
(3aS,6aS)-5-(4-bromophenyl)-3-[[3-(2-methylphenyl)-1,2,4-oxadiazol-5-yl]methyl]-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione
—— N'-[(3R)-1-(4-bromophenyl)-2,5-dioxopyrrolidin-3-yl]-4-pyrrol-1-ylbenzohydrazide —— C21H17BrN4O3
N'-[(3R)-1-(4-bromophenyl)-2,5-dioxopyrrolidin-3-yl]-4-pyrrol-1-ylbenzohydrazide
—— (1R,8R,9S)-11-(4-bromophenyl)-4-(2-oxo-2-piperidin-1-ylethyl)-8-thiophen-2-yl-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C25H22BrN3O4S3
(1R,8R,9S)-11-(4-bromophenyl)-4-(2-oxo-2-piperidin-1-ylethyl)-8-thiophen-2-yl-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (1R,8R,9S)-8-(3-bromophenyl)-11-(4-bromophenyl)-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C20H12Br2N2O3S2
(1R,8R,9S)-8-(3-bromophenyl)-11-(4-bromophenyl)-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (1R,8R,9S)-11-(4-bromophenyl)-4-(2-morpholin-4-yl-2-oxoethyl)-8-phenyl-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C26H22BrN3O5S2
(1R,8R,9S)-11-(4-bromophenyl)-4-(2-morpholin-4-yl-2-oxoethyl)-8-phenyl-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (1R,8R,9S)-11-(4-bromophenyl)-8-pyridin-3-yl-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C19H12BrN3O3S2
(1R,8R,9S)-11-(4-bromophenyl)-8-pyridin-3-yl-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— [4-[(3S,3aR,6aR)-5-(4-bromophenyl)-4,6-dioxo-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazol-3-yl]phenyl] benzenesulfonate —— C29H21BrN2O6S
[4-[(3S,3aR,6aR)-5-(4-bromophenyl)-4,6-dioxo-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazol-3-yl]phenyl] benzenesulfonate
—— (1R,8R,9S)-11-(4-bromophenyl)-8-(2-hydroxyphenyl)-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C20H13BrN2O4S2
(1R,8R,9S)-11-(4-bromophenyl)-8-(2-hydroxyphenyl)-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (3aR,6aR)-5-(4-bromophenyl)-3-[[3-(3-methylphenyl)-1,2,4-oxadiazol-5-yl]methyl]-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione —— C20H15BrN6O3
(3aR,6aR)-5-(4-bromophenyl)-3-[[3-(3-methylphenyl)-1,2,4-oxadiazol-5-yl]methyl]-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione
—— (3S,3aS,6aS)-5-(3-chloro-2-methylphenyl)-3-(4-methylphenyl)-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione —— C25H21ClN2O3
(3S,3aS,6aS)-5-(3-chloro-2-methylphenyl)-3-(4-methylphenyl)-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione
—— (1R,8R,9S)-11-(4-bromophenyl)-8-[4-[(3-chlorophenyl)methoxy]phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C27H18BrClN2O4S2
(1R,8R,9S)-11-(4-bromophenyl)-8-[4-[(3-chlorophenyl)methoxy]phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (3aR,6aR)-5-(4-bromophenyl)-3-[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione —— C19H13BrN6O3
(3aR,6aR)-5-(4-bromophenyl)-3-[(3-phenyl-1,2,4-oxadiazol-5-yl)methyl]-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione
—— (1R,8R,9S)-11-(4-bromophenyl)-8-[2-[(2-methylphenyl)methoxy]phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C28H21BrN2O4S2
(1R,8R,9S)-11-(4-bromophenyl)-8-[2-[(2-methylphenyl)methoxy]phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (1R,8R,9S)-11-(4-bromophenyl)-8-(furan-2-yl)-4-(2-oxo-2-piperidin-1-ylethyl)-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C25H22BrN3O5S2
(1R,8R,9S)-11-(4-bromophenyl)-8-(furan-2-yl)-4-(2-oxo-2-piperidin-1-ylethyl)-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (1R,8R,9S)-11-(4-bromophenyl)-8-(4-tert-butylphenyl)-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C24H21BrN2O3S2
(1R,8R,9S)-11-(4-bromophenyl)-8-(4-tert-butylphenyl)-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (1R,8R,9S)-11-(4-bromophenyl)-8-(2-phenylmethoxyphenyl)-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C27H19BrN2O4S2
(1R,8R,9S)-11-(4-bromophenyl)-8-(2-phenylmethoxyphenyl)-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (1R,2R,9R,10R,11R,12R,16S)-14-(4-bromophenyl)-9-pyridin-3-yl-3,7-dithia-5,14-diazapentacyclo[9.5.1.02,10.04,8.012,16]heptadec-4(8)-ene-6,13,15-trione —— C24H18BrN3O3S2
(1R,2R,9R,10R,11R,12R,16S)-14-(4-bromophenyl)-9-pyridin-3-yl-3,7-dithia-5,14-diazapentacyclo[9.5.1.02,10.04,8.012,16]heptadec-4(8)-ene-6,13,15-trione
—— (3aS,6aS)-5-(4-bromophenyl)-3-(4-nitrophenyl)-3a,6a-dihydropyrrolo[3,4-d][1,2]oxazole-4,6-dione —— C17H10BrN3O5
(3aS,6aS)-5-(4-bromophenyl)-3-(4-nitrophenyl)-3a,6a-dihydropyrrolo[3,4-d][1,2]oxazole-4,6-dione
—— (3S)-1-(4-bromophenyl)-3-(2-methylanilino)pyrrolidine-2,5-dione —— C17H15BrN2O2
(3S)-1-(4-bromophenyl)-3-(2-methylanilino)pyrrolidine-2,5-dione
—— (1R,8R,9S)-11-(4-bromophenyl)-8-[3-(2-oxo-2-piperidin-1-ylethoxy)phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C27H24BrN3O5S2
(1R,8R,9S)-11-(4-bromophenyl)-8-[3-(2-oxo-2-piperidin-1-ylethoxy)phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (1R,8R,9S)-11-(4-bromophenyl)-8-[2-[(3-methylphenyl)methoxy]phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C28H21BrN2O4S2
(1R,8R,9S)-11-(4-bromophenyl)-8-[2-[(3-methylphenyl)methoxy]phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— 2-[(3aR,6aR)-5-(4-bromophenyl)-4,6-dioxo-3a,6a-dihydropyrrolo[3,4-d]triazol-3-yl]-N-methyl-N-phenylacetamide —— C19H16BrN5O3
2-[(3aR,6aR)-5-(4-bromophenyl)-4,6-dioxo-3a,6a-dihydropyrrolo[3,4-d]triazol-3-yl]-N-methyl-N-phenylacetamide
—— (1R,8R,9S)-11-(4-bromophenyl)-8-[4-(2-oxo-2-piperidin-1-ylethoxy)phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C27H24BrN3O5S2
(1R,8R,9S)-11-(4-bromophenyl)-8-[4-(2-oxo-2-piperidin-1-ylethoxy)phenyl]-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (3S,3aS,6aS)-5-(4-bromophenyl)-3-(3,5-ditert-butyl-4-hydroxyphenyl)-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione —— C31H33BrN2O4
(3S,3aS,6aS)-5-(4-bromophenyl)-3-(3,5-ditert-butyl-4-hydroxyphenyl)-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione
—— (3aR,6aS)-3-[[3-(1,3-benzodioxol-5-yl)-1,2,4-oxadiazol-5-yl]methyl]-5-(4-bromophenyl)-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione —— C20H13BrN6O5
(3aR,6aS)-3-[[3-(1,3-benzodioxol-5-yl)-1,2,4-oxadiazol-5-yl]methyl]-5-(4-bromophenyl)-3a,6a-dihydropyrrolo[3,4-d]triazole-4,6-dione
—— 2-[(3aR,6aS)-5-(4-bromophenyl)-4,6-dioxo-3a,6a-dihydropyrrolo[3,4-d]triazol-3-yl]-N-methyl-N-phenylacetamide —— C19H16BrN5O3
2-[(3aR,6aS)-5-(4-bromophenyl)-4,6-dioxo-3a,6a-dihydropyrrolo[3,4-d]triazol-3-yl]-N-methyl-N-phenylacetamide
—— (1R,8R,9S)-11-(4-bromophenyl)-8-(2,3-dichlorophenyl)-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione —— C20H11BrCl2N2O3S2
(1R,8R,9S)-11-(4-bromophenyl)-8-(2,3-dichlorophenyl)-2,6-dithia-4,11-diazatricyclo[7.3.0.03,7]dodec-3(7)-ene-5,10,12-trione
—— (3R,3aR,6aS)-5-(3-chloro-2-methylphenyl)-3-(2-chlorophenyl)-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione —— C24H18Cl2N2O3
(3R,3aR,6aS)-5-(3-chloro-2-methylphenyl)-3-(2-chlorophenyl)-2-phenyl-3a,6a-dihydro-3H-pyrrolo[3,4-d][1,2]oxazole-4,6-dione