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

橙酮类黄酮

中文名称 英文名称 CAS号 化学式 结构式图片
—— (7Z)-7-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-9-methyl-3-(3-phenylpropyl)-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C29H26BrNO5
(7Z)-7-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-9-methyl-3-(3-phenylpropyl)-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (7Z)-7-[(2-bromophenyl)methylidene]-3-[2-(3,4-dimethoxyphenyl)ethyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C28H26BrNO5
(7Z)-7-[(2-bromophenyl)methylidene]-3-[2-(3,4-dimethoxyphenyl)ethyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (2E)-8-[2-(3,4-dimethoxyphenyl)ethyl]-4-methyl-2-[(3,4,5-trimethoxyphenyl)methylidene]-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C31H33NO8
(2E)-8-[2-(3,4-dimethoxyphenyl)ethyl]-4-methyl-2-[(3,4,5-trimethoxyphenyl)methylidene]-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2Z)-8-[(2,4-dichlorophenyl)methyl]-2-[(2,4-dichlorophenyl)methylidene]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C25H17Cl4NO3
(2Z)-8-[(2,4-dichlorophenyl)methyl]-2-[(2,4-dichlorophenyl)methylidene]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2E)-7-[[4-(4-fluorophenyl)piperazin-1-yl]methyl]-6-hydroxy-4-methyl-2-[(3,4,5-trimethoxyphenyl)methylidene]-1-benzofuran-3-one —— C30H31FN2O6
(2E)-7-[[4-(4-fluorophenyl)piperazin-1-yl]methyl]-6-hydroxy-4-methyl-2-[(3,4,5-trimethoxyphenyl)methylidene]-1-benzofuran-3-one
—— (2Z)-2-[(3-bromophenyl)methylidene]-8-[(2,4-dichlorophenyl)methyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C25H18BrCl2NO3
(2Z)-2-[(3-bromophenyl)methylidene]-8-[(2,4-dichlorophenyl)methyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (7Z)-7-[(3-bromophenyl)methylidene]-3-[(3,4-dichlorophenyl)methyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C25H18BrCl2NO3
(7Z)-7-[(3-bromophenyl)methylidene]-3-[(3,4-dichlorophenyl)methyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (2E)-2-[(6-chloro-4H-1,3-benzodioxin-8-yl)methylidene]-8-[2-(2,4-dichlorophenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C28H22Cl3NO5
(2E)-2-[(6-chloro-4H-1,3-benzodioxin-8-yl)methylidene]-8-[2-(2,4-dichlorophenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2Z)-2-[(5-bromo-2-methoxyphenyl)methylidene]-4-methyl-8-(3-morpholin-4-ylpropyl)-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C26H29BrN2O5
(2Z)-2-[(5-bromo-2-methoxyphenyl)methylidene]-4-methyl-8-(3-morpholin-4-ylpropyl)-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (7Z)-7-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-3-[(2-chlorophenyl)methyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C27H21BrClNO5
(7Z)-7-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-3-[(2-chlorophenyl)methyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (7Z)-7-[(4-bromophenyl)methylidene]-3-[2-(3,4-dimethoxyphenyl)ethyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C28H26BrNO5
(7Z)-7-[(4-bromophenyl)methylidene]-3-[2-(3,4-dimethoxyphenyl)ethyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (2Z)-2-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-8-[(2-chlorophenyl)methyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C27H21BrClNO5
(2Z)-2-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-8-[(2-chlorophenyl)methyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2Z)-2-[(5-bromo-2-methoxyphenyl)methylidene]-8-[(2-chlorophenyl)methyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C26H21BrClNO4
(2Z)-2-[(5-bromo-2-methoxyphenyl)methylidene]-8-[(2-chlorophenyl)methyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2E)-8-[2-(2,4-dichlorophenyl)ethyl]-4-methyl-2-[(2,3,4-trimethoxyphenyl)methylidene]-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C29H27Cl2NO6
(2E)-8-[2-(2,4-dichlorophenyl)ethyl]-4-methyl-2-[(2,3,4-trimethoxyphenyl)methylidene]-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2E)-8-[2-(2,4-dichlorophenyl)ethyl]-2-[(2,5-dimethoxyphenyl)methylidene]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C28H25Cl2NO5
(2E)-8-[2-(2,4-dichlorophenyl)ethyl]-2-[(2,5-dimethoxyphenyl)methylidene]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (7Z)-3-[2-(2,4-dichlorophenyl)ethyl]-7-[[4-(diethylamino)phenyl]methylidene]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C30H30Cl2N2O3
(7Z)-3-[2-(2,4-dichlorophenyl)ethyl]-7-[[4-(diethylamino)phenyl]methylidene]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— ethyl 1-[[(2E)-2-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-6-hydroxy-4-methyl-3-oxo-1-benzofuran-7-yl]methyl]piperidine-4-carboxylate —— C27H28BrNO7
ethyl 1-[[(2E)-2-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-6-hydroxy-4-methyl-3-oxo-1-benzofuran-7-yl]methyl]piperidine-4-carboxylate
—— (2Z)-8-[(2,4-dichlorophenyl)methyl]-4-methyl-2-[(2,3,4-trimethoxyphenyl)methylidene]-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C28H25Cl2NO6
(2Z)-8-[(2,4-dichlorophenyl)methyl]-4-methyl-2-[(2,3,4-trimethoxyphenyl)methylidene]-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (7Z)-7-[(5-bromo-2-methoxyphenyl)methylidene]-3-[(2,4-dichlorophenyl)methyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C26H20BrCl2NO4
(7Z)-7-[(5-bromo-2-methoxyphenyl)methylidene]-3-[(2,4-dichlorophenyl)methyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (2E)-2-[(6-chloro-4H-1,3-benzodioxin-8-yl)methylidene]-8-[2-(4-chlorophenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C28H23Cl2NO5
(2E)-2-[(6-chloro-4H-1,3-benzodioxin-8-yl)methylidene]-8-[2-(4-chlorophenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2Z)-2-[(4-bromophenyl)methylidene]-8-[(3,4-dichlorophenyl)methyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C25H18BrCl2NO3
(2Z)-2-[(4-bromophenyl)methylidene]-8-[(3,4-dichlorophenyl)methyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (7Z)-3-[(2,4-dichlorophenyl)methyl]-9-methyl-7-[(2,3,4-trimethoxyphenyl)methylidene]-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C28H25Cl2NO6
(7Z)-3-[(2,4-dichlorophenyl)methyl]-9-methyl-7-[(2,3,4-trimethoxyphenyl)methylidene]-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (7Z)-7-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-9-methyl-3-(thiophen-2-ylmethyl)-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C25H20BrNO5S
(7Z)-7-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-9-methyl-3-(thiophen-2-ylmethyl)-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (2E)-8-[2-(3,4-dimethoxyphenyl)ethyl]-4-methyl-2-[(4-phenylphenyl)methylidene]-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C34H31NO5
(2E)-8-[2-(3,4-dimethoxyphenyl)ethyl]-4-methyl-2-[(4-phenylphenyl)methylidene]-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2Z)-8-[(3,4-dimethoxyphenyl)methyl]-4-methyl-2-[(3,4,5-trimethoxyphenyl)methylidene]-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C30H31NO8
(2Z)-8-[(3,4-dimethoxyphenyl)methyl]-4-methyl-2-[(3,4,5-trimethoxyphenyl)methylidene]-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (7Z)-7-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-9-methyl-3-[(1S)-1-phenylethyl]-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C28H24BrNO5
(7Z)-7-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-9-methyl-3-[(1S)-1-phenylethyl]-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (7Z)-3-[2-(2,4-dichlorophenyl)ethyl]-9-methyl-7-[(2,3,4-trimethoxyphenyl)methylidene]-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C29H27Cl2NO6
(7Z)-3-[2-(2,4-dichlorophenyl)ethyl]-9-methyl-7-[(2,3,4-trimethoxyphenyl)methylidene]-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (7Z)-7-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-3-[2-(2,4-dichlorophenyl)ethyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C28H22BrCl2NO5
(7Z)-7-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-3-[2-(2,4-dichlorophenyl)ethyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (2Z)-2-[(4-bromophenyl)methylidene]-8-[(2,4-dichlorophenyl)methyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C25H18BrCl2NO3
(2Z)-2-[(4-bromophenyl)methylidene]-8-[(2,4-dichlorophenyl)methyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2E)-2-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-8-[2-(4-fluorophenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C28H23BrFNO5
(2E)-2-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-8-[2-(4-fluorophenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (7Z)-3-[(3,4-dichlorophenyl)methyl]-9-methyl-7-[(4-phenylphenyl)methylidene]-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C31H23Cl2NO3
(7Z)-3-[(3,4-dichlorophenyl)methyl]-9-methyl-7-[(4-phenylphenyl)methylidene]-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (7Z)-7-[(6-chloro-4H-1,3-benzodioxin-8-yl)methylidene]-3-[(3,4-dichlorophenyl)methyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C27H20Cl3NO5
(7Z)-7-[(6-chloro-4H-1,3-benzodioxin-8-yl)methylidene]-3-[(3,4-dichlorophenyl)methyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (2Z)-2-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-4-methyl-8-(2-morpholin-4-ylethyl)-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C26H27BrN2O6
(2Z)-2-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-4-methyl-8-(2-morpholin-4-ylethyl)-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2E)-2-[(5-bromo-2-methoxyphenyl)methylidene]-8-[2-(3,4-dimethoxyphenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C29H28BrNO6
(2E)-2-[(5-bromo-2-methoxyphenyl)methylidene]-8-[2-(3,4-dimethoxyphenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (7Z)-3-[2-(3,4-dimethoxyphenyl)ethyl]-9-methyl-7-[(3,4,5-trimethoxyphenyl)methylidene]-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C31H33NO8
(7Z)-3-[2-(3,4-dimethoxyphenyl)ethyl]-9-methyl-7-[(3,4,5-trimethoxyphenyl)methylidene]-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (7Z)-7-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-3-[(3S)-1,1-dioxothiolan-3-yl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C24H22BrNO7S
(7Z)-7-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-3-[(3S)-1,1-dioxothiolan-3-yl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (2Z)-2-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-8-[(3R)-1,1-dioxothiolan-3-yl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C24H22BrNO7S
(2Z)-2-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-8-[(3R)-1,1-dioxothiolan-3-yl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2E)-2-[(3,4-dichlorophenyl)methylidene]-8-[2-(3,4-dimethoxyphenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C28H25Cl2NO5
(2E)-2-[(3,4-dichlorophenyl)methylidene]-8-[2-(3,4-dimethoxyphenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2Z)-8-[(3,4-dichlorophenyl)methyl]-4-methyl-2-[(4-phenylphenyl)methylidene]-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C31H23Cl2NO3
(2Z)-8-[(3,4-dichlorophenyl)methyl]-4-methyl-2-[(4-phenylphenyl)methylidene]-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2E)-2-[(5-bromo-2-methoxyphenyl)methylidene]-8-[2-(4-methoxyphenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C28H26BrNO5
(2E)-2-[(5-bromo-2-methoxyphenyl)methylidene]-8-[2-(4-methoxyphenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2Z)-2-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-6-hydroxy-4-methyl-7-[(4-pyridin-2-ylpiperazin-1-yl)methyl]-1-benzofuran-3-one —— C28H26BrN3O5
(2Z)-2-[(6-bromo-4H-1,3-benzodioxin-8-yl)methylidene]-6-hydroxy-4-methyl-7-[(4-pyridin-2-ylpiperazin-1-yl)methyl]-1-benzofuran-3-one
—— (2E)-2-[(2,6-dichlorophenyl)methylidene]-8-[2-(3,4-dimethoxyphenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C28H25Cl2NO5
(2E)-2-[(2,6-dichlorophenyl)methylidene]-8-[2-(3,4-dimethoxyphenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2Z)-8-[(3,4-dichlorophenyl)methyl]-2-[(3,4-dichlorophenyl)methylidene]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C25H17Cl4NO3
(2Z)-8-[(3,4-dichlorophenyl)methyl]-2-[(3,4-dichlorophenyl)methylidene]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2Z)-8-[(2,4-dichlorophenyl)methyl]-4-methyl-2-[(4-phenylphenyl)methylidene]-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C31H23Cl2NO3
(2Z)-8-[(2,4-dichlorophenyl)methyl]-4-methyl-2-[(4-phenylphenyl)methylidene]-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— (2Z)-2-[(5-bromo-2-methoxyphenyl)methylidene]-7-[[4-(4-fluorophenyl)piperazin-1-yl]methyl]-6-hydroxy-4-methyl-1-benzofuran-3-one —— C28H26BrFN2O4
(2Z)-2-[(5-bromo-2-methoxyphenyl)methylidene]-7-[[4-(4-fluorophenyl)piperazin-1-yl]methyl]-6-hydroxy-4-methyl-1-benzofuran-3-one
—— (7Z)-7-[(3-bromophenyl)methylidene]-3-[2-(3,4-dimethoxyphenyl)ethyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one —— C28H26BrNO5
(7Z)-7-[(3-bromophenyl)methylidene]-3-[2-(3,4-dimethoxyphenyl)ethyl]-9-methyl-2,4-dihydrofuro[3,2-g][1,3]benzoxazin-6-one
—— (2Z)-2-[(5-bromo-2-methoxyphenyl)methylidene]-6-hydroxy-4-methyl-7-[(4-pyridin-2-ylpiperazin-1-yl)methyl]-1-benzofuran-3-one —— C27H26BrN3O4
(2Z)-2-[(5-bromo-2-methoxyphenyl)methylidene]-6-hydroxy-4-methyl-7-[(4-pyridin-2-ylpiperazin-1-yl)methyl]-1-benzofuran-3-one
—— (2E)-2-[(5-bromo-2-methoxyphenyl)methylidene]-8-[2-(2,4-dichlorophenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C27H22BrCl2NO4
(2E)-2-[(5-bromo-2-methoxyphenyl)methylidene]-8-[2-(2,4-dichlorophenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one
—— ethyl 1-[[(2E)-2-[(5-bromo-2-methoxyphenyl)methylidene]-6-hydroxy-4-methyl-3-oxo-1-benzofuran-7-yl]methyl]piperidine-4-carboxylate —— C26H28BrNO6
ethyl 1-[[(2E)-2-[(5-bromo-2-methoxyphenyl)methylidene]-6-hydroxy-4-methyl-3-oxo-1-benzofuran-7-yl]methyl]piperidine-4-carboxylate
—— (2E)-2-[(2,4-dichlorophenyl)methylidene]-8-[2-(3,4-dimethoxyphenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one —— C28H25Cl2NO5
(2E)-2-[(2,4-dichlorophenyl)methylidene]-8-[2-(3,4-dimethoxyphenyl)ethyl]-4-methyl-7,9-dihydrofuro[2,3-f][1,3]benzoxazin-3-one