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

中文名称 英文名称 CAS号 化学式 结构式图片
—— pentasodium;(3Z)-5-amino-3-[[5-[(4-amino-6-chloro-1,3,5-triazin-2-yl)amino]-2-sulfonatophenyl]hydrazinylidene]-6-[(2,5-disulfonatophenyl)diazenyl]-4-oxonaphthalene-2,7-disulfonate —— C25H14ClN10Na5O16S5
pentasodium;(3Z)-5-amino-3-[[5-[(4-amino-6-chloro-1,3,5-triazin-2-yl)amino]-2-sulfonatophenyl]hydrazinylidene]-6-[(2,5-disulfonatophenyl)diazenyl]-4-oxonaphthalene-2,7-disulfonate
—— disodium;(3E)-7-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-3-[(4-methoxy-2-sulfonatophenyl)hydrazinylidene]-4-oxonaphthalene-2-sulfonate —— C20H12Cl2N6Na2O8S2
disodium;(3E)-7-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-3-[(4-methoxy-2-sulfonatophenyl)hydrazinylidene]-4-oxonaphthalene-2-sulfonate
—— (4Z)-4-[(4-chloro-2-methoxyphenyl)hydrazinylidene]-3-oxo-N-(2-oxo-1,3-dihydrobenzimidazol-5-yl)naphthalene-2-carboxamide —— C25H18ClN5O4
(4Z)-4-[(4-chloro-2-methoxyphenyl)hydrazinylidene]-3-oxo-N-(2-oxo-1,3-dihydrobenzimidazol-5-yl)naphthalene-2-carboxamide
—— lithium;(6Z)-4-hydroxy-6-[[4-[hydroxy-[(E)-[(4E)-4-[(E)-(8-hydroxy-1-oxo-3,6-disulfonaphthalen-2-ylidene)hydrazinylidene]-3-methoxycyclohexa-2,5-dien-1-ylidene]amino]amino]-2-methoxyphenyl]hydrazinylidene]-5-oxo-7-sulfonaphthalene-2-sulfonate —— C34H25LiN6O19S4
lithium;(6Z)-4-hydroxy-6-[[4-[hydroxy-[(E)-[(4E)-4-[(E)-(8-hydroxy-1-oxo-3,6-disulfonaphthalen-2-ylidene)hydrazinylidene]-3-methoxycyclohexa-2,5-dien-1-ylidene]amino]amino]-2-methoxyphenyl]hydrazinylidene]-5-oxo-7-sulfonaphthalene-2-sulfonate
—— (3E)-7-amino-4-oxo-3-[[4-(2-sulfooxyethoxy)phenyl]hydrazinylidene]naphthalene-2-sulfonic acid —— C18H17N3O9S2
(3E)-7-amino-4-oxo-3-[[4-(2-sulfooxyethoxy)phenyl]hydrazinylidene]naphthalene-2-sulfonic acid
—— (4Z)-N-(4-chloro-2-methoxyphenyl)-4-[(2-methoxy-5-nitrophenyl)hydrazinylidene]-3-oxonaphthalene-2-carboxamide —— C25H19ClN4O6
(4Z)-N-(4-chloro-2-methoxyphenyl)-4-[(2-methoxy-5-nitrophenyl)hydrazinylidene]-3-oxonaphthalene-2-carboxamide
—— (4Z)-4-[(2-methoxy-5-nitrophenyl)hydrazinylidene]-N-(2-methoxyphenyl)-3-oxonaphthalene-2-carboxamide —— C25H20N4O6
(4Z)-4-[(2-methoxy-5-nitrophenyl)hydrazinylidene]-N-(2-methoxyphenyl)-3-oxonaphthalene-2-carboxamide
—— (3E)-3-[(2-hydroxy-3-nitro-5-sulfophenyl)hydrazinylidene]-4-oxo-5-[(2Z)-2-(2-oxonaphthalen-1-ylidene)hydrazinyl]naphthalene-2,7-disulfonic acid —— C26H17N5O14S3
(3E)-3-[(2-hydroxy-3-nitro-5-sulfophenyl)hydrazinylidene]-4-oxo-5-[(2Z)-2-(2-oxonaphthalen-1-ylidene)hydrazinyl]naphthalene-2,7-disulfonic acid
—— 3-[(2E)-2-[3-[(2-methoxyphenyl)carbamoyl]-2-oxonaphthalen-1-ylidene]hydrazinyl]benzenesulfonic acid —— C24H19N3O6S
3-[(2E)-2-[3-[(2-methoxyphenyl)carbamoyl]-2-oxonaphthalen-1-ylidene]hydrazinyl]benzenesulfonic acid
—— (4Z)-4-[(5-carbamoyl-2-methoxyphenyl)hydrazinylidene]-N-(5-chloro-2,4-dimethoxyphenyl)-3-oxonaphthalene-2-carboxamide —— C27H23ClN4O6
(4Z)-4-[(5-carbamoyl-2-methoxyphenyl)hydrazinylidene]-N-(5-chloro-2,4-dimethoxyphenyl)-3-oxonaphthalene-2-carboxamide
—— (4Z)-N,N-bis(2-hydroxyethyl)-4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)hydrazinylidene]-3-oxonaphthalene-1-sulfonamide —— C24H25N5O6S
(4Z)-N,N-bis(2-hydroxyethyl)-4-[(3-methyl-5-oxo-1-phenyl-4H-pyrazol-4-yl)hydrazinylidene]-3-oxonaphthalene-1-sulfonamide
—— barium(2+);2-[(2Z)-2-(1-oxonaphthalen-2-ylidene)hydrazinyl]naphthalene-1-sulfonate —— C40H26BaN4O8S2
barium(2+);2-[(2Z)-2-(1-oxonaphthalen-2-ylidene)hydrazinyl]naphthalene-1-sulfonate
—— tetrasodium;(3E)-5-amino-3-[[5-[[4-(3-chloroanilino)-6-fluoro-1,3,5-triazin-2-yl]amino]-2-sulfonatophenyl]hydrazinylidene]-4-oxo-6-[(4-sulfonatophenyl)diazenyl]naphthalene-2,7-disulfonate —— C31H18ClFN10Na4O13S4
tetrasodium;(3E)-5-amino-3-[[5-[[4-(3-chloroanilino)-6-fluoro-1,3,5-triazin-2-yl]amino]-2-sulfonatophenyl]hydrazinylidene]-4-oxo-6-[(4-sulfonatophenyl)diazenyl]naphthalene-2,7-disulfonate
—— trisodium;(3E)-7-[[4-chloro-6-(3-sulfonatoanilino)-1,3,5-triazin-2-yl]amino]-3-[(4-methoxy-2-sulfonatophenyl)hydrazinylidene]-4-oxonaphthalene-2-sulfonate —— C26H17ClN7Na3O11S3
trisodium;(3E)-7-[[4-chloro-6-(3-sulfonatoanilino)-1,3,5-triazin-2-yl]amino]-3-[(4-methoxy-2-sulfonatophenyl)hydrazinylidene]-4-oxonaphthalene-2-sulfonate
—— (4E)-4-[(5-chloro-4-methyl-2-sulfophenyl)hydrazinylidene]-3-oxonaphthalene-2,7-disulfonic acid —— C17H13ClN2O10S3
(4E)-4-[(5-chloro-4-methyl-2-sulfophenyl)hydrazinylidene]-3-oxonaphthalene-2,7-disulfonic acid
—— (3Z)-5-hydroxy-3-[[4-[hydroxy-[(E)-[(4E)-4-[(E)-(8-hydroxy-1-oxo-3,6-disulfonaphthalen-2-ylidene)hydrazinylidene]-3-methoxycyclohexa-2,5-dien-1-ylidene]amino]amino]-2-methoxyphenyl]hydrazinylidene]-4-oxonaphthalene-2,7-disulfonic acid —— C34H26N6O19S4
(3Z)-5-hydroxy-3-[[4-[hydroxy-[(E)-[(4E)-4-[(E)-(8-hydroxy-1-oxo-3,6-disulfonaphthalen-2-ylidene)hydrazinylidene]-3-methoxycyclohexa-2,5-dien-1-ylidene]amino]amino]-2-methoxyphenyl]hydrazinylidene]-4-oxonaphthalene-2,7-disulfonic acid
—— dialuminum;(3E)-5-amino-4-oxo-3-(phenylhydrazinylidene)naphthalene-2,7-disulfonate —— C48H33Al2N9O21S6
dialuminum;(3E)-5-amino-4-oxo-3-(phenylhydrazinylidene)naphthalene-2,7-disulfonate
—— trisodium;(5E)-5-[[4-[[4-[(4-aminophenyl)diazenyl]-6-sulfonatonaphthalen-1-yl]diazenyl]-6-sulfonatonaphthalen-1-yl]hydrazinylidene]-6-oxonaphthalene-2-sulfonate —— C36H22N7Na3O10S3
trisodium;(5E)-5-[[4-[[4-[(4-aminophenyl)diazenyl]-6-sulfonatonaphthalen-1-yl]diazenyl]-6-sulfonatonaphthalen-1-yl]hydrazinylidene]-6-oxonaphthalene-2-sulfonate
—— sodium;(6E)-6-[(3-chloro-2-hydroxy-5-nitrophenyl)hydrazinylidene]-5-oxonaphthalene-1-sulfonate —— C16H9ClN3NaO7S
sodium;(6E)-6-[(3-chloro-2-hydroxy-5-nitrophenyl)hydrazinylidene]-5-oxonaphthalene-1-sulfonate
—— (4Z)-4-[(4-chloro-2-methylphenyl)hydrazinylidene]-N-(2-methylphenyl)-3-oxonaphthalene-2-carboxamide —— C25H20ClN3O2
(4Z)-4-[(4-chloro-2-methylphenyl)hydrazinylidene]-N-(2-methylphenyl)-3-oxonaphthalene-2-carboxamide
—— calcium;(4E)-4-[(3-chloro-2-ethyl-5-sulfonatophenyl)hydrazinylidene]-3-oxonaphthalene-2-carboxylate —— C19H13CaClN2O6S
calcium;(4E)-4-[(3-chloro-2-ethyl-5-sulfonatophenyl)hydrazinylidene]-3-oxonaphthalene-2-carboxylate
—— 4-[(2E)-2-[3-[(2Z)-2-(2,4-dinitro-6-oxocyclohexa-2,4-dien-1-ylidene)hydrazinyl]-4-hydroxy-6-oxocyclohexa-2,4-dien-1-ylidene]hydrazinyl]-5-hydroxynaphthalene-2,7-disulfonic acid —— C22H14N6O14S2
4-[(2E)-2-[3-[(2Z)-2-(2,4-dinitro-6-oxocyclohexa-2,4-dien-1-ylidene)hydrazinyl]-4-hydroxy-6-oxocyclohexa-2,4-dien-1-ylidene]hydrazinyl]-5-hydroxynaphthalene-2,7-disulfonic acid
—— sodium;(3E)-3-[(4-acetamidophenyl)hydrazinylidene]-7-amino-4-oxonaphthalene-2-sulfonate —— C18H15N4NaO5S
sodium;(3E)-3-[(4-acetamidophenyl)hydrazinylidene]-7-amino-4-oxonaphthalene-2-sulfonate
—— 7-[[(6E)-6-[(2-methoxyphenyl)hydrazinylidene]-5-oxo-7-sulfonaphthalen-2-yl]carbamoylamino]-4-oxo-3-[(6-sulfonaphthalen-2-yl)hydrazinylidene]naphthalene-2-sulfonic acid —— C38H28N6O13S3
7-[[(6E)-6-[(2-methoxyphenyl)hydrazinylidene]-5-oxo-7-sulfonaphthalen-2-yl]carbamoylamino]-4-oxo-3-[(6-sulfonaphthalen-2-yl)hydrazinylidene]naphthalene-2-sulfonic acid
—— 7-[[4-(2-hydroxyethylamino)-6-[[(6E)-6-[(2-hydroxy-5-sulfophenyl)hydrazinylidene]-5-oxo-7-sulfonaphthalen-2-yl]amino]-1,3,5-triazin-2-yl]amino]-3-[(4-methoxy-2-sulfophenyl)hydrazinylidene]-4-oxonaphthalene-2-sulfonic acid —— C38H32N10O17S4
7-[[4-(2-hydroxyethylamino)-6-[[(6E)-6-[(2-hydroxy-5-sulfophenyl)hydrazinylidene]-5-oxo-7-sulfonaphthalen-2-yl]amino]-1,3,5-triazin-2-yl]amino]-3-[(4-methoxy-2-sulfophenyl)hydrazinylidene]-4-oxonaphthalene-2-sulfonic acid
—— barium(2+);3-chloro-4-ethyl-5-[(2E)-2-(2-oxonaphthalen-1-ylidene)hydrazinyl]benzenesulfonate —— C36H28BaCl2N4O8S2
barium(2+);3-chloro-4-ethyl-5-[(2E)-2-(2-oxonaphthalen-1-ylidene)hydrazinyl]benzenesulfonate
—— copper;(4E)-3-oxo-4-(phenylhydrazinylidene)naphthalene-2-carboxylic acid —— C17H12CuN2O3
copper;(4E)-3-oxo-4-(phenylhydrazinylidene)naphthalene-2-carboxylic acid
—— (3E)-5-[[4-[bis[2-(2-chloroethylsulfonyl)ethyl]amino]-6-chloro-1,3,5-triazin-2-yl]amino]-4-oxo-3-[(4-sulfophenyl)hydrazinylidene]naphthalene-2,7-disulfonic acid —— C27H28Cl3N7O14S5
(3E)-5-[[4-[bis[2-(2-chloroethylsulfonyl)ethyl]amino]-6-chloro-1,3,5-triazin-2-yl]amino]-4-oxo-3-[(4-sulfophenyl)hydrazinylidene]naphthalene-2,7-disulfonic acid
—— (4Z)-N-(2,5-dimethoxyphenyl)-4-[(2-ethylphenyl)hydrazinylidene]-3-oxonaphthalene-2-carboxamide —— C27H25N3O4
(4Z)-N-(2,5-dimethoxyphenyl)-4-[(2-ethylphenyl)hydrazinylidene]-3-oxonaphthalene-2-carboxamide
—— 3-[[4-[4-[(2Z)-2-[4-hydroxy-6-oxo-3-[2-[(7E)-8-oxo-7-[(E)-(6-oxocyclohexa-2,4-dien-1-ylidene)hydrazinylidene]-3,6-disulfonaphthalen-1-yl]hydrazinyl]cyclohexa-2,4-dien-1-ylidene]hydrazinyl]anilino]-3-sulfophenyl]hydrazinylidene]-6-oxocyclohexa-1,4-diene-1-carboxylic acid —— C41H29N9O16S3
3-[[4-[4-[(2Z)-2-[4-hydroxy-6-oxo-3-[2-[(7E)-8-oxo-7-[(E)-(6-oxocyclohexa-2,4-dien-1-ylidene)hydrazinylidene]-3,6-disulfonaphthalen-1-yl]hydrazinyl]cyclohexa-2,4-dien-1-ylidene]hydrazinyl]anilino]-3-sulfophenyl]hydrazinylidene]-6-oxocyclohexa-1,4-diene-1-carboxylic acid
—— (4Z)-N-(5-chloro-2-methoxyphenyl)-4-[(2-methoxy-5-nitrophenyl)hydrazinylidene]-3-oxonaphthalene-2-carboxamide —— C25H19ClN4O6
(4Z)-N-(5-chloro-2-methoxyphenyl)-4-[(2-methoxy-5-nitrophenyl)hydrazinylidene]-3-oxonaphthalene-2-carboxamide
—— trisodium;(6E)-4-amino-3-[[4-[(4-anilino-5-sulfonatonaphthalen-1-yl)diazenyl]phenyl]diazenyl]-5-oxo-6-(phenylhydrazinylidene)naphthalene-2,7-disulfonate —— C38H25N8Na3O10S3
trisodium;(6E)-4-amino-3-[[4-[(4-anilino-5-sulfonatonaphthalen-1-yl)diazenyl]phenyl]diazenyl]-5-oxo-6-(phenylhydrazinylidene)naphthalene-2,7-disulfonate
—— (3E)-3-[(4-acetamidophenyl)hydrazinylidene]-6-amino-4-oxonaphthalene-2-sulfonic acid —— C18H16N4O5S
(3E)-3-[(4-acetamidophenyl)hydrazinylidene]-6-amino-4-oxonaphthalene-2-sulfonic acid
—— disodium;4-[(2E)-2-[3-[(2Z)-2-(2,4-dinitro-6-oxocyclohexa-2,4-dien-1-ylidene)hydrazinyl]-4-hydroxy-6-oxocyclohexa-2,4-dien-1-ylidene]hydrazinyl]-5-hydroxynaphthalene-2,7-disulfonate —— C22H12N6Na2O14S2
disodium;4-[(2E)-2-[3-[(2Z)-2-(2,4-dinitro-6-oxocyclohexa-2,4-dien-1-ylidene)hydrazinyl]-4-hydroxy-6-oxocyclohexa-2,4-dien-1-ylidene]hydrazinyl]-5-hydroxynaphthalene-2,7-disulfonate
—— (3E)-7-acetamido-4-oxo-3-[[1-sulfo-6-(2-sulfooxyethylsulfonyl)naphthalen-2-yl]hydrazinylidene]naphthalene-2-sulfonic acid —— C24H21N3O14S4
(3E)-7-acetamido-4-oxo-3-[[1-sulfo-6-(2-sulfooxyethylsulfonyl)naphthalen-2-yl]hydrazinylidene]naphthalene-2-sulfonic acid
—— (2R)-1-(1,3-benzodioxol-5-ylmethoxy)-3-[methyl(naphthalen-2-yl)amino]propan-2-ol —— C22H23NO4
(2R)-1-(1,3-benzodioxol-5-ylmethoxy)-3-[methyl(naphthalen-2-yl)amino]propan-2-ol
—— trisodium;(5E)-5-[[4-[[4-[[4-(2-amino-2-oxoethyl)phenyl]diazenyl]-6-sulfonatonaphthalen-1-yl]diazenyl]-6-sulfonatonaphthalen-1-yl]hydrazinylidene]-6-oxonaphthalene-2-sulfonate —— C38H24N7Na3O11S3
trisodium;(5E)-5-[[4-[[4-[[4-(2-amino-2-oxoethyl)phenyl]diazenyl]-6-sulfonatonaphthalen-1-yl]diazenyl]-6-sulfonatonaphthalen-1-yl]hydrazinylidene]-6-oxonaphthalene-2-sulfonate
—— (4E)-N-(4-methoxyphenyl)-4-[(4-methoxyphenyl)hydrazinylidene]-3-oxonaphthalene-2-carboxamide —— C25H21N3O4
(4E)-N-(4-methoxyphenyl)-4-[(4-methoxyphenyl)hydrazinylidene]-3-oxonaphthalene-2-carboxamide
—— barium(2+);3-[(2Z)-2-(1-oxonaphthalen-2-ylidene)hydrazinyl]naphthalene-1,5-disulfonate —— C20H12BaN2O7S2
barium(2+);3-[(2Z)-2-(1-oxonaphthalen-2-ylidene)hydrazinyl]naphthalene-1,5-disulfonate
—— disodium;(3E)-5-acetamido-4-oxo-3-[(3-phosphonophenyl)hydrazinylidene]naphthalene-2,7-disulfonate —— C18H14N3Na2O11PS2
disodium;(3E)-5-acetamido-4-oxo-3-[(3-phosphonophenyl)hydrazinylidene]naphthalene-2,7-disulfonate
—— (5E)-5-[[4-[[4-[(4-aminophenyl)diazenyl]-6-sulfonaphthalen-1-yl]diazenyl]-6-sulfonaphthalen-1-yl]hydrazinylidene]-6-oxonaphthalene-2-sulfonic acid —— C36H25N7O10S3
(5E)-5-[[4-[[4-[(4-aminophenyl)diazenyl]-6-sulfonaphthalen-1-yl]diazenyl]-6-sulfonaphthalen-1-yl]hydrazinylidene]-6-oxonaphthalene-2-sulfonic acid
—— (4Z)-4-[(4-chloro-2-methylphenyl)hydrazinylidene]-N-(4-dodecylphenyl)-3-oxonaphthalene-2-carboxamide —— C36H42ClN3O2
(4Z)-4-[(4-chloro-2-methylphenyl)hydrazinylidene]-N-(4-dodecylphenyl)-3-oxonaphthalene-2-carboxamide
—— (3E)-7-[[4-chloro-6-(4-sulfoanilino)-1,3,5-triazin-2-yl]methylamino]-3-[(4-methoxy-2-sulfophenyl)hydrazinylidene]-4-oxonaphthalene-2-sulfonic acid —— C27H22ClN7O11S3
(3E)-7-[[4-chloro-6-(4-sulfoanilino)-1,3,5-triazin-2-yl]methylamino]-3-[(4-methoxy-2-sulfophenyl)hydrazinylidene]-4-oxonaphthalene-2-sulfonic acid
—— pentasodium;(3Z)-5-amino-3-[[5-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-2-sulfonatophenyl]hydrazinylidene]-6-[(2,5-disulfonatophenyl)diazenyl]-4-oxonaphthalene-2,7-disulfonate —— C25H12Cl2N9Na5O16S5
pentasodium;(3Z)-5-amino-3-[[5-[(4,6-dichloro-1,3,5-triazin-2-yl)amino]-2-sulfonatophenyl]hydrazinylidene]-6-[(2,5-disulfonatophenyl)diazenyl]-4-oxonaphthalene-2,7-disulfonate
—— (3E)-6-amino-3-[[4-[4-[(2Z)-2-(7-amino-1-oxo-3-sulfonaphthalen-2-ylidene)hydrazinyl]-2-sulfoanilino]phenyl]hydrazinylidene]-4-oxonaphthalene-2-sulfonic acid —— C32H25N7O11S3
(3E)-6-amino-3-[[4-[4-[(2Z)-2-(7-amino-1-oxo-3-sulfonaphthalen-2-ylidene)hydrazinyl]-2-sulfoanilino]phenyl]hydrazinylidene]-4-oxonaphthalene-2-sulfonic acid
—— (4E)-3-oxo-4-[(1-sulfonaphthalen-2-yl)hydrazinylidene]naphthalene-2,7-disulfonic acid —— C20H14N2O10S3
(4E)-3-oxo-4-[(1-sulfonaphthalen-2-yl)hydrazinylidene]naphthalene-2,7-disulfonic acid
—— (3E)-3-[[5-(2,3-dibromopropanoylamino)-2-sulfophenyl]hydrazinylidene]-7-[2,3-dibromopropanoyl(methyl)amino]-4-oxonaphthalene-2-sulfonic acid —— C23H20Br4N4O9S2
(3E)-3-[[5-(2,3-dibromopropanoylamino)-2-sulfophenyl]hydrazinylidene]-7-[2,3-dibromopropanoyl(methyl)amino]-4-oxonaphthalene-2-sulfonic acid
—— tetrasodium;(3E)-3-[(6,8-disulfonatonaphthalen-2-yl)hydrazinylidene]-5-hydroxy-4-oxonaphthalene-2,7-disulfonate —— C20H10N2Na4O14S4
tetrasodium;(3E)-3-[(6,8-disulfonatonaphthalen-2-yl)hydrazinylidene]-5-hydroxy-4-oxonaphthalene-2,7-disulfonate
—— (6E)-4-amino-3-[[5-[[4-chloro-6-(3-sulfoanilino)-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]diazenyl]-6-[[5-[[4-chloro-6-(3-sulfoanilino)-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]hydrazinylidene]-5-oxonaphthalene-2,7-disulfonic acid —— C40H29Cl2N15O19S6
(6E)-4-amino-3-[[5-[[4-chloro-6-(3-sulfoanilino)-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]diazenyl]-6-[[5-[[4-chloro-6-(3-sulfoanilino)-1,3,5-triazin-2-yl]amino]-2-sulfophenyl]hydrazinylidene]-5-oxonaphthalene-2,7-disulfonic acid
—— (4Z)-4-[(4-chloro-2-methylphenyl)hydrazinylidene]-N-(2-ethoxyphenyl)-3-oxonaphthalene-2-carboxamide —— C26H22ClN3O3
(4Z)-4-[(4-chloro-2-methylphenyl)hydrazinylidene]-N-(2-ethoxyphenyl)-3-oxonaphthalene-2-carboxamide