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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

    吡咯

    相关化合物

    中文名称 英文名称 CAS号 化学式 结构式图片
    —— (6Z)-2-cyclohexyl-6-{[1-(2,3-dichlorophenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-5-imino-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C24H23Cl2N5OS
    (6Z)-2-cyclohexyl-6-{[1-(2,3-dichlorophenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-5-imino-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— 2-chloro-5-[3-[(Z)-(2,4-dioxo-1,3-thiazolidin-5-ylidene)methyl]-2,5-dimethylpyrrol-1-yl]benzoic acid —— C17H13ClN2O4S
    2-chloro-5-[3-[(Z)-(2,4-dioxo-1,3-thiazolidin-5-ylidene)methyl]-2,5-dimethylpyrrol-1-yl]benzoic acid
    —— (E)-6-((1-(4-(sec-butyl)phenyl)-2,5-dimethyl-1H-pyrrol-3-yl)methylene)-2-ethyl-5-imino-5H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7(6H)-one —— C24H27N5OS
    (E)-6-((1-(4-(sec-butyl)phenyl)-2,5-dimethyl-1H-pyrrol-3-yl)methylene)-2-ethyl-5-imino-5H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7(6H)-one
    —— (Z)-1-(2-chloro-1-phenylindol-3-yl)-2-diazonioethenolate —— C16H10ClN3O
    (Z)-1-(2-chloro-1-phenylindol-3-yl)-2-diazonioethenolate
    —— 1-(4-fluorophenyl)-2,5-dimethyl-N-[(Z)-(1-methyl-2-oxoindol-3-ylidene)amino]pyrrole-3-carboxamide —— C22H19FN4O2
    1-(4-fluorophenyl)-2,5-dimethyl-N-[(Z)-(1-methyl-2-oxoindol-3-ylidene)amino]pyrrole-3-carboxamide
    —— (2Z,5Z)-5-{[1-(2-ethylphenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-3-methyl-2-(methylimino)-1,3-thiazolidin-4-one —— C20H23N3OS
    (2Z,5Z)-5-{[1-(2-ethylphenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-3-methyl-2-(methylimino)-1,3-thiazolidin-4-one
    —— N-[(Z)-[1-(2,5-dichlorophenyl)-2,5-dimethylpyrrol-3-yl]methylideneamino]-4-(4-fluorophenyl)-1,3-thiazol-2-amine —— C22H17Cl2FN4S
    N-[(Z)-[1-(2,5-dichlorophenyl)-2,5-dimethylpyrrol-3-yl]methylideneamino]-4-(4-fluorophenyl)-1,3-thiazol-2-amine
    —— (6Z)-2-benzyl-6-{[1-(3-chloro-4-methylphenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-5-imino-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C26H22ClN5OS
    (6Z)-2-benzyl-6-{[1-(3-chloro-4-methylphenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-5-imino-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— 3-(2-{(1E)-2-cyano-3-[(2-ethylphenyl)amino]-3-oxoprop-1-en-1-yl}-1H-pyrrol-1-yl)benzoic acid —— C23H19N3O3
    3-(2-{(1E)-2-cyano-3-[(2-ethylphenyl)amino]-3-oxoprop-1-en-1-yl}-1H-pyrrol-1-yl)benzoic acid
    —— ethyl 2-[[(E)-3-[1-(3-chloro-4-fluorophenyl)-2,5-dimethylpyrrol-3-yl]-2-cyanoprop-2-enoyl]amino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate —— C27H25ClFN3O3S
    ethyl 2-[[(E)-3-[1-(3-chloro-4-fluorophenyl)-2,5-dimethylpyrrol-3-yl]-2-cyanoprop-2-enoyl]amino]-4,5,6,7-tetrahydro-1-benzothiophene-3-carboxylate
    —— (6E)-6-{[1-(2-ethylphenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-2-heptyl-5-imino-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C27H33N5OS
    (6E)-6-{[1-(2-ethylphenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-2-heptyl-5-imino-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6Z)-6-[[1-(3-chloro-2-methylphenyl)-2,5-dimethylpyrrol-3-yl]methylidene]-5-imino-2-(thiophen-2-ylmethyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C24H20ClN5OS2
    (6Z)-6-[[1-(3-chloro-2-methylphenyl)-2,5-dimethylpyrrol-3-yl]methylidene]-5-imino-2-(thiophen-2-ylmethyl)-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— N-[(Z)-[1-(3,4-dimethylphenyl)-2,5-dimethylpyrrol-3-yl]methylideneamino]-4-(2,5-diphenylpyrrol-1-yl)benzamide —— C38H34N4O
    N-[(Z)-[1-(3,4-dimethylphenyl)-2,5-dimethylpyrrol-3-yl]methylideneamino]-4-(2,5-diphenylpyrrol-1-yl)benzamide
    —— 4-(2,5-diphenylpyrrol-1-yl)-N-[(Z)-[3-methoxy-4-[(4-nitrophenyl)methoxy]phenyl]methylideneamino]benzamide —— C38H30N4O5
    4-(2,5-diphenylpyrrol-1-yl)-N-[(Z)-[3-methoxy-4-[(4-nitrophenyl)methoxy]phenyl]methylideneamino]benzamide
    —— methyl 4-[3-[(Z)-[[4-(2,5-diphenylpyrrol-1-yl)benzoyl]hydrazinylidene]methyl]-2,5-dimethylpyrrol-1-yl]benzoate —— C38H32N4O3
    methyl 4-[3-[(Z)-[[4-(2,5-diphenylpyrrol-1-yl)benzoyl]hydrazinylidene]methyl]-2,5-dimethylpyrrol-1-yl]benzoate
    —— N-[(Z)-[5-(4-chlorophenyl)furan-2-yl]methylideneamino]-4-(2,5-diphenylpyrrol-1-yl)benzamide —— C34H24ClN3O2
    N-[(Z)-[5-(4-chlorophenyl)furan-2-yl]methylideneamino]-4-(2,5-diphenylpyrrol-1-yl)benzamide
    —— (6Z)-2-(1-adamantyl)-6-[(2,5-dimethyl-1-phenylpyrrol-3-yl)methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C28H29N5OS
    (6Z)-2-(1-adamantyl)-6-[(2,5-dimethyl-1-phenylpyrrol-3-yl)methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6Z)-6-{[2,5-dimethyl-1-(3-methylphenyl)-1H-pyrrol-3-yl]methylidene}-5-imino-2-(phenoxymethyl)-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C26H23N5O2S
    (6Z)-6-{[2,5-dimethyl-1-(3-methylphenyl)-1H-pyrrol-3-yl]methylidene}-5-imino-2-(phenoxymethyl)-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6Z)-6-{[1-(2,5-dichlorophenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-5-imino-2-methyl-5,6-dihydro-7H-[1,3]thiazolo[3,2-a]pyrimidin-7-one —— C20H16Cl2N4OS
    (6Z)-6-{[1-(2,5-dichlorophenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-5-imino-2-methyl-5,6-dihydro-7H-[1,3]thiazolo[3,2-a]pyrimidin-7-one
    —— (2Z)-2-(4-fluorophenyl)-3-[1-(4-methoxyphenyl)-1H-pyrrol-2-yl]prop-2-enenitrile —— C20H15FN2O
    (2Z)-2-(4-fluorophenyl)-3-[1-(4-methoxyphenyl)-1H-pyrrol-2-yl]prop-2-enenitrile
    —— ethyl 3-(3-{(Z)-[3-(2-chloro-6-fluorobenzyl)-2,4-dioxo-1,3-thiazolidin-5-ylidene]methyl}-2,5-dimethyl-1H-pyrrol-1-yl)benzoate —— C26H22ClFN2O4S
    ethyl 3-(3-{(Z)-[3-(2-chloro-6-fluorobenzyl)-2,4-dioxo-1,3-thiazolidin-5-ylidene]methyl}-2,5-dimethyl-1H-pyrrol-1-yl)benzoate
    —— (6Z)-6-{[2,5-dimethyl-1-(2-methylphenyl)-1H-pyrrol-3-yl]methylidene}-2-(furan-2-yl)-5-imino-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C23H19N5O2S
    (6Z)-6-{[2,5-dimethyl-1-(2-methylphenyl)-1H-pyrrol-3-yl]methylidene}-2-(furan-2-yl)-5-imino-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— ethyl (2E,5S)-2-[[1-(3,4-dichlorophenyl)-2,5-dimethylpyrrol-3-yl]methylidene]-7-methyl-3-oxo-5-phenyl-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate —— C29H25Cl2N3O3S
    ethyl (2E,5S)-2-[[1-(3,4-dichlorophenyl)-2,5-dimethylpyrrol-3-yl]methylidene]-7-methyl-3-oxo-5-phenyl-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate
    —— ethyl (2E,5R)-2-[[1-(3,4-dichlorophenyl)-2,5-dimethylpyrrol-3-yl]methylidene]-7-methyl-3-oxo-5-phenyl-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate —— C29H25Cl2N3O3S
    ethyl (2E,5R)-2-[[1-(3,4-dichlorophenyl)-2,5-dimethylpyrrol-3-yl]methylidene]-7-methyl-3-oxo-5-phenyl-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate
    —— N-[(Z)-[1-(4-ethylphenyl)-2,5-dimethylpyrrol-3-yl]methylideneamino]-5-nitropyridin-2-amine —— C20H21N5O2
    N-[(Z)-[1-(4-ethylphenyl)-2,5-dimethylpyrrol-3-yl]methylideneamino]-5-nitropyridin-2-amine
    —— ethyl (2E,5R)-2-[[2,5-dimethyl-1-(4-methylphenyl)pyrrol-3-yl]methylidene]-5-(4-methoxyphenyl)-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate —— C31H31N3O4S
    ethyl (2E,5R)-2-[[2,5-dimethyl-1-(4-methylphenyl)pyrrol-3-yl]methylidene]-5-(4-methoxyphenyl)-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate
    —— ethyl (2E,5S)-2-[[2,5-dimethyl-1-(4-methylphenyl)pyrrol-3-yl]methylidene]-5-(4-methoxyphenyl)-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate —— C31H31N3O4S
    ethyl (2E,5S)-2-[[2,5-dimethyl-1-(4-methylphenyl)pyrrol-3-yl]methylidene]-5-(4-methoxyphenyl)-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate
    —— ethyl (2E,5R)-5-(2,5-dimethoxyphenyl)-2-[[1-(4-ethoxycarbonylphenyl)-2,5-dimethylpyrrol-3-yl]methylidene]-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate —— C34H35N3O7S
    ethyl (2E,5R)-5-(2,5-dimethoxyphenyl)-2-[[1-(4-ethoxycarbonylphenyl)-2,5-dimethylpyrrol-3-yl]methylidene]-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate
    —— ethyl (2E,5S)-5-(2,5-dimethoxyphenyl)-2-[[1-(4-ethoxycarbonylphenyl)-2,5-dimethylpyrrol-3-yl]methylidene]-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate —— C34H35N3O7S
    ethyl (2E,5S)-5-(2,5-dimethoxyphenyl)-2-[[1-(4-ethoxycarbonylphenyl)-2,5-dimethylpyrrol-3-yl]methylidene]-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate
    —— ethyl (2E,5S)-2-[[2,5-dimethyl-1-(4-nitrophenyl)pyrrol-3-yl]methylidene]-5-(4-methoxyphenyl)-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate —— C30H28N4O6S
    ethyl (2E,5S)-2-[[2,5-dimethyl-1-(4-nitrophenyl)pyrrol-3-yl]methylidene]-5-(4-methoxyphenyl)-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate
    —— ethyl (2E,5R)-2-[[2,5-dimethyl-1-(4-nitrophenyl)pyrrol-3-yl]methylidene]-5-(4-methoxyphenyl)-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate —— C30H28N4O6S
    ethyl (2E,5R)-2-[[2,5-dimethyl-1-(4-nitrophenyl)pyrrol-3-yl]methylidene]-5-(4-methoxyphenyl)-7-methyl-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate
    —— (6Z)-2-cyclohexyl-6-{[1-(2,4-dichlorophenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-5-imino-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C24H23Cl2N5OS
    (6Z)-2-cyclohexyl-6-{[1-(2,4-dichlorophenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-5-imino-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6Z)-6-{[1-(5-chloro-2-methoxyphenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-5-imino-2-(propan-2-yl)-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C22H22ClN5O2S
    (6Z)-6-{[1-(5-chloro-2-methoxyphenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-5-imino-2-(propan-2-yl)-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— 4-[5-hydroxy-4-[(E)-3-hydroxyoct-1-enyl]-1-phenyl-5,6-dihydro-4H-cyclopenta[b]pyrrol-2-yl]butanoic acid —— C25H33NO4
    4-[5-hydroxy-4-[(E)-3-hydroxyoct-1-enyl]-1-phenyl-5,6-dihydro-4H-cyclopenta[b]pyrrol-2-yl]butanoic acid
    —— N-[(Z)-[1-(2-methylphenyl)pyrrol-2-yl]methylideneamino]-3-(trifluoromethyl)benzamide —— C20H16F3N3O
    N-[(Z)-[1-(2-methylphenyl)pyrrol-2-yl]methylideneamino]-3-(trifluoromethyl)benzamide
    —— N-[(Z)-[1-[4-(1-adamantyl)phenyl]-2,5-dimethylpyrrol-3-yl]methylideneamino]-1-benzofuran-2-carboxamide —— C32H33N3O2
    N-[(Z)-[1-[4-(1-adamantyl)phenyl]-2,5-dimethylpyrrol-3-yl]methylideneamino]-1-benzofuran-2-carboxamide
    —— N-[(Z)-[2,5-dimethyl-1-(2-methyl-4-nitrophenyl)pyrrol-3-yl]methylideneamino]-5-nitropyridin-2-amine —— C19H18N6O4
    N-[(Z)-[2,5-dimethyl-1-(2-methyl-4-nitrophenyl)pyrrol-3-yl]methylideneamino]-5-nitropyridin-2-amine
    —— (6Z)-2-(2-cyclohexylethyl)-6-[[2,5-dimethyl-1-(2-methylphenyl)pyrrol-3-yl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C27H31N5OS
    (6Z)-2-(2-cyclohexylethyl)-6-[[2,5-dimethyl-1-(2-methylphenyl)pyrrol-3-yl]methylidene]-5-imino-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (6E)-6-{[1-(2,4-dichlorophenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-5-imino-2-pentyl-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C23H23Cl2N5OS
    (6E)-6-{[1-(2,4-dichlorophenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-5-imino-2-pentyl-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— ethyl (2Z,5S)-2-[[2,5-dimethyl-1-(4-nitrophenyl)pyrrol-3-yl]methylidene]-7-methyl-5-(4-methylphenyl)-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate —— C30H28N4O5S
    ethyl (2Z,5S)-2-[[2,5-dimethyl-1-(4-nitrophenyl)pyrrol-3-yl]methylidene]-7-methyl-5-(4-methylphenyl)-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate
    —— 4-[3-[(Z)-[[2-(3-bromophenoxy)acetyl]hydrazinylidene]methyl]-2,5-dimethylpyrrol-1-yl]-3-methylbenzoic acid —— C23H22BrN3O4
    4-[3-[(Z)-[[2-(3-bromophenoxy)acetyl]hydrazinylidene]methyl]-2,5-dimethylpyrrol-1-yl]-3-methylbenzoic acid
    —— ethyl (2Z,5R)-2-[[2,5-dimethyl-1-(4-nitrophenyl)pyrrol-3-yl]methylidene]-7-methyl-5-(4-methylphenyl)-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate —— C30H28N4O5S
    ethyl (2Z,5R)-2-[[2,5-dimethyl-1-(4-nitrophenyl)pyrrol-3-yl]methylidene]-7-methyl-5-(4-methylphenyl)-3-oxo-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate
    —— (2E)-2-cyano-N-(naphthalen-2-yl)-3-[1-(4-nitrophenyl)-2,5-diphenyl-1H-pyrrol-3-yl]prop-2-enamide —— C36H24N4O3
    (2E)-2-cyano-N-(naphthalen-2-yl)-3-[1-(4-nitrophenyl)-2,5-diphenyl-1H-pyrrol-3-yl]prop-2-enamide
    —— (E)-6-((1-(2,3-dimethylphenyl)-2,5-dimethyl-1H-pyrrol-3-yl)methylene)-5-imino-2-((o-tolyloxy)methyl)-5H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7(6H)-one —— C28H27N5O2S
    (E)-6-((1-(2,3-dimethylphenyl)-2,5-dimethyl-1H-pyrrol-3-yl)methylene)-5-imino-2-((o-tolyloxy)methyl)-5H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7(6H)-one
    —— (6Z)-2-cyclohexyl-5-imino-6-{[1-(2-methoxyphenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C25H27N5O2S
    (6Z)-2-cyclohexyl-5-imino-6-{[1-(2-methoxyphenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-5,6-dihydro-7H-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one
    —— (E)-2-tert-butylsulfonyl-3-[4-(2,5-dimethylpyrrol-1-yl)phenyl]prop-2-enenitrile —— C19H22N2O2S
    (E)-2-tert-butylsulfonyl-3-[4-(2,5-dimethylpyrrol-1-yl)phenyl]prop-2-enenitrile
    —— (4E)-4-{[1-(4-fluorophenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-1-phenylpyrazolidine-3,5-dione —— C22H18FN3O2
    (4E)-4-{[1-(4-fluorophenyl)-2,5-dimethyl-1H-pyrrol-3-yl]methylidene}-1-phenylpyrazolidine-3,5-dione
    —— N'-[(Z)-(1,2-dimethyl-1H-indol-3-yl)methylidene]-2-(1H-pyrrol-1-yl)benzohydrazide —— C22H20N4O
    N'-[(Z)-(1,2-dimethyl-1H-indol-3-yl)methylidene]-2-(1H-pyrrol-1-yl)benzohydrazide
    —— N-[(Z)-(2-bromo-5-methoxy-4-phenylmethoxyphenyl)methylideneamino]-2-pyrrol-1-ylbenzamide —— C26H22BrN3O3
    N-[(Z)-(2-bromo-5-methoxy-4-phenylmethoxyphenyl)methylideneamino]-2-pyrrol-1-ylbenzamide
    —— (6E)-2-ethyl-5-imino-6-[[1-(2-methoxy-4-nitrophenyl)-2,5-dimethylpyrrol-3-yl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one —— C21H20N6O4S
    (6E)-2-ethyl-5-imino-6-[[1-(2-methoxy-4-nitrophenyl)-2,5-dimethylpyrrol-3-yl]methylidene]-[1,3,4]thiadiazolo[3,2-a]pyrimidin-7-one