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异吲哚及其衍生物

中文名称 英文名称 CAS号 化学式 结构式图片
—— (1R,2S,6S,7R)-4-[(Z)-[2-[(4-nitrophenyl)methoxy]phenyl]methylideneamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione —— C23H19N3O5
(1R,2S,6S,7R)-4-[(Z)-[2-[(4-nitrophenyl)methoxy]phenyl]methylideneamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
—— (3aR,6E,7aR)-6-[(2,4-dinitrophenyl)hydrazinylidene]-2-(2-oxo-2-pyrrolidin-1-ylethyl)-4,5,7,7a-tetrahydro-3aH-isoindole-1,3-dione —— C20H22N6O7
(3aR,6E,7aR)-6-[(2,4-dinitrophenyl)hydrazinylidene]-2-(2-oxo-2-pyrrolidin-1-ylethyl)-4,5,7,7a-tetrahydro-3aH-isoindole-1,3-dione
—— (1R,2S,6S,7R)-4-[(Z)-[4-[(4-bromophenyl)methoxy]-3-methoxyphenyl]methylideneamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione —— C24H21BrN2O4
(1R,2S,6S,7R)-4-[(Z)-[4-[(4-bromophenyl)methoxy]-3-methoxyphenyl]methylideneamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
—— (1R,2S,6S,7R)-4-[(3-hydroxy-4-oxocyclohexa-2,5-dien-1-ylidene)methylamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione —— C16H14N2O4
(1R,2S,6S,7R)-4-[(3-hydroxy-4-oxocyclohexa-2,5-dien-1-ylidene)methylamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
—— N-[(1S,2S,6S,7S)-3,5-dioxospiro[4-azatricyclo[5.2.1.02,6]dec-8-ene-10,1'-cyclopropane]-4-yl]-2-naphthalen-1-ylacetamide —— C23H20N2O3
N-[(1S,2S,6S,7S)-3,5-dioxospiro[4-azatricyclo[5.2.1.02,6]dec-8-ene-10,1'-cyclopropane]-4-yl]-2-naphthalen-1-ylacetamide
—— (3aS,7aR)-2-[[[(3aR,7aS)-5-chloro-1,3-dioxo-3a,4,7,7a-tetrahydroisoindol-2-yl]methyl-(2-phenylmethoxyethyl)amino]methyl]-5-chloro-3a,4,7,7a-tetrahydroisoindole-1,3-dione —— C27H29Cl2N3O5
(3aS,7aR)-2-[[[(3aR,7aS)-5-chloro-1,3-dioxo-3a,4,7,7a-tetrahydroisoindol-2-yl]methyl-(2-phenylmethoxyethyl)amino]methyl]-5-chloro-3a,4,7,7a-tetrahydroisoindole-1,3-dione
—— (3aS,7aR)-2-[[[(3aR,7aR)-5-chloro-1,3-dioxo-3a,4,7,7a-tetrahydroisoindol-2-yl]methyl-(2-phenylmethoxyethyl)amino]methyl]-5-chloro-3a,4,7,7a-tetrahydroisoindole-1,3-dione —— C27H29Cl2N3O5
(3aS,7aR)-2-[[[(3aR,7aR)-5-chloro-1,3-dioxo-3a,4,7,7a-tetrahydroisoindol-2-yl]methyl-(2-phenylmethoxyethyl)amino]methyl]-5-chloro-3a,4,7,7a-tetrahydroisoindole-1,3-dione
—— (1R,2S,6R,7R)-4-[(3-bromo-4-oxocyclohexa-2,5-dien-1-ylidene)methylamino]-4-azatricyclo[5.2.2.02,6]undec-8-ene-3,5-dione —— C17H15BrN2O3
(1R,2S,6R,7R)-4-[(3-bromo-4-oxocyclohexa-2,5-dien-1-ylidene)methylamino]-4-azatricyclo[5.2.2.02,6]undec-8-ene-3,5-dione
—— (1R,2S,6S,7R)-4-[(Z)-[2-(naphthalen-1-ylmethoxy)phenyl]methylideneamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione —— C27H22N2O3
(1R,2S,6S,7R)-4-[(Z)-[2-(naphthalen-1-ylmethoxy)phenyl]methylideneamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
—— (1R,2S,6R,7R)-4-[(Z)-[4-[(4-bromophenyl)methoxy]-3-methoxyphenyl]methylideneamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione —— C24H21BrN2O4
(1R,2S,6R,7R)-4-[(Z)-[4-[(4-bromophenyl)methoxy]-3-methoxyphenyl]methylideneamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
—— (1R,2S,6S,7R)-4-[(Z)-(2-methoxyphenyl)methylideneamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione —— C17H16N2O3
(1R,2S,6S,7R)-4-[(Z)-(2-methoxyphenyl)methylideneamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
—— (1R,2S,6R,7R)-4-[(Z)-[2-(naphthalen-1-ylmethoxy)phenyl]methylideneamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione —— C27H22N2O3
(1R,2S,6R,7R)-4-[(Z)-[2-(naphthalen-1-ylmethoxy)phenyl]methylideneamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
—— (1R,2S,6S,7R)-4-[(3-bromo-4-oxocyclohexa-2,5-dien-1-ylidene)methylamino]-4-azatricyclo[5.2.2.02,6]undec-8-ene-3,5-dione —— C17H15BrN2O3
(1R,2S,6S,7R)-4-[(3-bromo-4-oxocyclohexa-2,5-dien-1-ylidene)methylamino]-4-azatricyclo[5.2.2.02,6]undec-8-ene-3,5-dione
—— (1R,2S,6S,7R)-4-[(1-methylpiperidin-1-ium-1-yl)methyl]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione —— C16H23N2O2+
(1R,2S,6S,7R)-4-[(1-methylpiperidin-1-ium-1-yl)methyl]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
—— 2-[(1R,2S,6S,7R)-3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl]-N-(5-ethoxy-1,3-benzothiazol-2-yl)acetamide —— C20H19N3O4S
2-[(1R,2S,6S,7R)-3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl]-N-(5-ethoxy-1,3-benzothiazol-2-yl)acetamide
—— (1S,5R,6S,7S)-N,3-bis[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C29H28N4O3
(1S,5R,6S,7S)-N,3-bis[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1R,2S,6S,7R)-4-[(Z)-(2-nitrophenyl)methylideneamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione —— C16H13N3O4
(1R,2S,6S,7R)-4-[(Z)-(2-nitrophenyl)methylideneamino]-4-azatricyclo[5.2.1.02,6]dec-8-ene-3,5-dione
—— (1R,5R,6S,7R)-3-(1,3-benzodioxol-5-yl)-4-oxo-N-propan-2-yl-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C19H20N2O5
(1R,5R,6S,7R)-3-(1,3-benzodioxol-5-yl)-4-oxo-N-propan-2-yl-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1R,5S,6R,7R)-N-(4-methoxyphenyl)-4-oxo-3-(2-phenylethyl)-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C24H24N2O4
(1R,5S,6R,7R)-N-(4-methoxyphenyl)-4-oxo-3-(2-phenylethyl)-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1R,5S,6S,7R)-N-(4-methoxyphenyl)-4-oxo-3-(2-phenylethyl)-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C24H24N2O4
(1R,5S,6S,7R)-N-(4-methoxyphenyl)-4-oxo-3-(2-phenylethyl)-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1R,5S,6R,7R)-3-(1,3-benzodioxol-5-yl)-4-oxo-N-propan-2-yl-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C19H20N2O5
(1R,5S,6R,7R)-3-(1,3-benzodioxol-5-yl)-4-oxo-N-propan-2-yl-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5R,6R,7S)-N,3-bis[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C29H28N4O3
(1S,5R,6R,7S)-N,3-bis[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5R,6S,7S)-3-[2-(1H-indol-3-yl)ethyl]-N-(3-methylbutyl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C24H29N3O3
(1S,5R,6S,7S)-3-[2-(1H-indol-3-yl)ethyl]-N-(3-methylbutyl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5S,6R,7S)-N,3-bis[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C29H28N4O3
(1S,5S,6R,7S)-N,3-bis[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1R,5R,6S,7R)-N-[2-(1H-indol-3-yl)ethyl]-3-(5-methyl-1,2-oxazol-3-yl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C23H22N4O4
(1R,5R,6S,7R)-N-[2-(1H-indol-3-yl)ethyl]-3-(5-methyl-1,2-oxazol-3-yl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5S,6R,7S)-N-cyclohexyl-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C25H29N3O3
(1S,5S,6R,7S)-N-cyclohexyl-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5S,6S,7S)-N,3-bis[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C29H28N4O3
(1S,5S,6S,7S)-N,3-bis[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5R,6R,7S)-3-[2-(1H-indol-3-yl)ethyl]-N-(3-methylbutyl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C24H29N3O3
(1S,5R,6R,7S)-3-[2-(1H-indol-3-yl)ethyl]-N-(3-methylbutyl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5R,6S,7S)-N-cyclopentyl-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C24H27N3O3
(1S,5R,6S,7S)-N-cyclopentyl-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5R,6S,7S)-3-[2-(1H-indol-3-yl)ethyl]-N-(3-morpholin-4-ylpropyl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C26H32N4O4
(1S,5R,6S,7S)-3-[2-(1H-indol-3-yl)ethyl]-N-(3-morpholin-4-ylpropyl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5R,6R,7S)-N-cyclohexyl-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C25H29N3O3
(1S,5R,6R,7S)-N-cyclohexyl-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1R,5R,6R,7R)-3-(1,3-benzodioxol-5-yl)-4-oxo-N-propan-2-yl-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C19H20N2O5
(1R,5R,6R,7R)-3-(1,3-benzodioxol-5-yl)-4-oxo-N-propan-2-yl-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— 2-[(1R,2R,6S,7R)-3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl]-N-(1,3-thiazol-2-yl)acetamide —— C14H13N3O3S
2-[(1R,2R,6S,7R)-3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl]-N-(1,3-thiazol-2-yl)acetamide
—— (1S,2S,3S,6S,9R,10S,11S)-6-(furan-2-yl)-N-[2-(1H-indol-3-yl)ethyl]-3-methyl-4,8-dioxo-14-oxa-7-azatetracyclo[9.2.1.01,9.02,7]tetradec-12-ene-10-carboxamide —— C28H27N3O5
(1S,2S,3S,6S,9R,10S,11S)-6-(furan-2-yl)-N-[2-(1H-indol-3-yl)ethyl]-3-methyl-4,8-dioxo-14-oxa-7-azatetracyclo[9.2.1.01,9.02,7]tetradec-12-ene-10-carboxamide
—— (1S,5S,6S,7S)-3-[2-(1H-indol-3-yl)ethyl]-N-(3-methylbutyl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C24H29N3O3
(1S,5S,6S,7S)-3-[2-(1H-indol-3-yl)ethyl]-N-(3-methylbutyl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5S,6R,7S)-3-[2-(1H-indol-3-yl)ethyl]-N-(3-methylbutyl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C24H29N3O3
(1S,5S,6R,7S)-3-[2-(1H-indol-3-yl)ethyl]-N-(3-methylbutyl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5R,6S,7S)-N-cyclohexyl-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C25H29N3O3
(1S,5R,6S,7S)-N-cyclohexyl-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5S,6S,7S)-3-[2-(1H-indol-3-yl)ethyl]-N-(2-morpholin-4-ylethyl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C25H30N4O4
(1S,5S,6S,7S)-3-[2-(1H-indol-3-yl)ethyl]-N-(2-morpholin-4-ylethyl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5S,6R,7S)-N-cyclopentyl-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C24H27N3O3
(1S,5S,6R,7S)-N-cyclopentyl-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5S,6R,7S)-N-(3-fluorophenyl)-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C25H22FN3O3
(1S,5S,6R,7S)-N-(3-fluorophenyl)-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5S,6S,7S)-N-(3-fluorophenyl)-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C25H22FN3O3
(1S,5S,6S,7S)-N-(3-fluorophenyl)-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5S,6S,7S)-N-cyclohexyl-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C25H29N3O3
(1S,5S,6S,7S)-N-cyclohexyl-3-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,5R,6S,7S)-3-[2-(1H-indol-3-yl)ethyl]-N-(2-morpholin-4-ylethyl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C25H30N4O4
(1S,5R,6S,7S)-3-[2-(1H-indol-3-yl)ethyl]-N-(2-morpholin-4-ylethyl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,2R,3R,6S,9R,10S,11S)-6-(furan-2-yl)-3-methyl-4,8-dioxo-N-(4-propan-2-ylphenyl)-14-oxa-7-azatetracyclo[9.2.1.01,9.02,7]tetradec-12-ene-10-carboxamide —— C27H28N2O5
(1S,2R,3R,6S,9R,10S,11S)-6-(furan-2-yl)-3-methyl-4,8-dioxo-N-(4-propan-2-ylphenyl)-14-oxa-7-azatetracyclo[9.2.1.01,9.02,7]tetradec-12-ene-10-carboxamide
—— 2-[(1R,2R,6S,7R)-3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl]-N-(5-ethoxy-1,3-benzothiazol-2-yl)acetamide —— C20H19N3O4S
2-[(1R,2R,6S,7R)-3,5-dioxo-4-azatricyclo[5.2.1.02,6]dec-8-en-4-yl]-N-(5-ethoxy-1,3-benzothiazol-2-yl)acetamide
—— (1S,2R,3R,6R,9R,10S,11S)-6-(furan-2-yl)-3-methyl-N-(4-methylphenyl)-4,8-dioxo-14-oxa-7-azatetracyclo[9.2.1.01,9.02,7]tetradec-12-ene-10-carboxamide —— C25H24N2O5
(1S,2R,3R,6R,9R,10S,11S)-6-(furan-2-yl)-3-methyl-N-(4-methylphenyl)-4,8-dioxo-14-oxa-7-azatetracyclo[9.2.1.01,9.02,7]tetradec-12-ene-10-carboxamide
—— (1S,5R,6R,7S)-3-(1,3-benzodioxol-5-yl)-N-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C26H23N3O5
(1S,5R,6R,7S)-3-(1,3-benzodioxol-5-yl)-N-[2-(1H-indol-3-yl)ethyl]-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1R,5S,6S,7R)-3-(1,3-benzodioxol-5-yl)-4-oxo-N-propan-2-yl-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C19H20N2O5
(1R,5S,6S,7R)-3-(1,3-benzodioxol-5-yl)-4-oxo-N-propan-2-yl-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide
—— (1S,2S,3S,6S,9R,10S,11S)-6-(furan-2-yl)-N-(3-methoxyphenyl)-3-methyl-4,8-dioxo-14-oxa-7-azatetracyclo[9.2.1.01,9.02,7]tetradec-12-ene-10-carboxamide —— C25H24N2O6
(1S,2S,3S,6S,9R,10S,11S)-6-(furan-2-yl)-N-(3-methoxyphenyl)-3-methyl-4,8-dioxo-14-oxa-7-azatetracyclo[9.2.1.01,9.02,7]tetradec-12-ene-10-carboxamide
—— (1R,5S,6S,7R)-N-[2-(1H-indol-3-yl)ethyl]-3-(5-methyl-1,2-oxazol-3-yl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide —— C23H22N4O4
(1R,5S,6S,7R)-N-[2-(1H-indol-3-yl)ethyl]-3-(5-methyl-1,2-oxazol-3-yl)-4-oxo-10-oxa-3-azatricyclo[5.2.1.01,5]dec-8-ene-6-carboxamide