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
历史搜索
    热门化合物HOT
    • 喹啉
    • 水杨醛
    • 二溴甲烷
    • 谷胱甘肽
    • L-乳酸
    • 苯巴比妥
    • 辣椒碱
    • 非那明
    • 百草枯
    • 联苯烯
    首页 分子通 按分子结构分类 有机化合物 有机杂环化合物 苯并恶嗪类

    苯并恶嗪类

    中文名称 英文名称 CAS号 化学式 结构式图片
    —— (1'R,2R,4'R,5'S)-5'-[(3S)-3-(hydroxymethyl)piperidine-1-carbonyl]spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C22H28N2O4
    (1'R,2R,4'R,5'S)-5'-[(3S)-3-(hydroxymethyl)piperidine-1-carbonyl]spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one
    —— (1'R,2S,4'R,5'S)-5'-[(3S)-3-hydroxypiperidine-1-carbonyl]-7-methoxyspiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C22H28N2O5
    (1'R,2S,4'R,5'S)-5'-[(3S)-3-hydroxypiperidine-1-carbonyl]-7-methoxyspiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one
    —— (1'R,2R,2'S,4'R)-N-cyclopropyl-7-methoxy-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C20H24N2O4
    (1'R,2R,2'S,4'R)-N-cyclopropyl-7-methoxy-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— 2-[4-(3-oxo-4H-1,4-benzoxazine-6-carbonyl)piperidin-1-yl]-N,N-di(propan-2-yl)acetamide —— C22H31N3O4
    2-[4-(3-oxo-4H-1,4-benzoxazine-6-carbonyl)piperidin-1-yl]-N,N-di(propan-2-yl)acetamide
    —— (1'R,2R,4'R,5'S)-5'-[(3S)-3-hydroxypiperidine-1-carbonyl]-7-methoxyspiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C22H28N2O5
    (1'R,2R,4'R,5'S)-5'-[(3S)-3-hydroxypiperidine-1-carbonyl]-7-methoxyspiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one
    —— (1'R,2S,4'R,5'S)-7-methoxy-5'-(piperidine-1-carbonyl)spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C22H28N2O4
    (1'R,2S,4'R,5'S)-7-methoxy-5'-(piperidine-1-carbonyl)spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one
    —— (1'R,2S,2'S,4'R)-N-cyclopropyl-7-methoxy-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C20H24N2O4
    (1'R,2S,2'S,4'R)-N-cyclopropyl-7-methoxy-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,2'S,4'R)-1'-methyl-4-oxo-N-(pyridin-3-ylmethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C23H25N3O3
    (1'R,2S,2'S,4'R)-1'-methyl-4-oxo-N-(pyridin-3-ylmethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2R,2'S,4'R)-N-[3-(furan-2-carbonylamino)propyl]-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C24H27N3O5
    (1'R,2R,2'S,4'R)-N-[3-(furan-2-carbonylamino)propyl]-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'S,2S,2'S,4'S)-1'-methyl-4-oxo-N-(pyridin-2-ylmethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C23H25N3O3
    (1'S,2S,2'S,4'S)-1'-methyl-4-oxo-N-(pyridin-2-ylmethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,2'S,4'R)-N-[(3-fluorophenyl)methyl]-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C23H23FN2O3
    (1'R,2S,2'S,4'R)-N-[(3-fluorophenyl)methyl]-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,4'R,5'R)-5'-(4-acetylpiperazine-1-carbonyl)-7-methoxyspiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C23H29N3O5
    (1'R,2S,4'R,5'R)-5'-(4-acetylpiperazine-1-carbonyl)-7-methoxyspiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one
    —— (1'R,2S,2'S,4'R)-7-methoxy-4-oxo-N-(2-piperidin-1-ylethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C24H33N3O4
    (1'R,2S,2'S,4'R)-7-methoxy-4-oxo-N-(2-piperidin-1-ylethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,2'R,4'R)-7-methoxy-N-(2-methoxyethyl)-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C20H26N2O5
    (1'R,2S,2'R,4'R)-7-methoxy-N-(2-methoxyethyl)-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,2'S,4'R)-7-methoxy-4-oxo-N-(2-pyridin-4-ylethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C24H27N3O4
    (1'R,2S,2'S,4'R)-7-methoxy-4-oxo-N-(2-pyridin-4-ylethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,2'S,4'R)-N-cyclopentyl-7-methoxy-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C22H28N2O4
    (1'R,2S,2'S,4'R)-N-cyclopentyl-7-methoxy-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,4'R,5'S)-7-methoxy-5'-(morpholine-4-carbonyl)spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C21H26N2O5
    (1'R,2S,4'R,5'S)-7-methoxy-5'-(morpholine-4-carbonyl)spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one
    —— (1'R,2S,4'R,5'S)-7-methoxy-5'-(4-methylpiperazine-1-carbonyl)spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C22H29N3O4
    (1'R,2S,4'R,5'S)-7-methoxy-5'-(4-methylpiperazine-1-carbonyl)spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one
    —— (1'R,2S,4'R,5'S)-5'-[(2R)-2-(hydroxymethyl)piperidine-1-carbonyl]-7-methoxyspiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C23H30N2O5
    (1'R,2S,4'R,5'S)-5'-[(2R)-2-(hydroxymethyl)piperidine-1-carbonyl]-7-methoxyspiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one
    —— (1'R,2S,2'R,4'R)-N-[2-(3,5-dimethylpyrazol-1-yl)ethyl]-7-methoxy-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C24H30N4O4
    (1'R,2S,2'R,4'R)-N-[2-(3,5-dimethylpyrazol-1-yl)ethyl]-7-methoxy-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,2'S,4'R)-7-methoxy-N-methyl-4-oxo-N-(2-pyridin-2-ylethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C25H29N3O4
    (1'R,2S,2'S,4'R)-7-methoxy-N-methyl-4-oxo-N-(2-pyridin-2-ylethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'S,2S,2'S,4'S)-1'-methyl-4-oxo-N-(2-pyridin-4-ylethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C24H27N3O3
    (1'S,2S,2'S,4'S)-1'-methyl-4-oxo-N-(2-pyridin-4-ylethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— 6-[1-[(1R,3S)-3-methoxycyclohexanecarbonyl]piperidine-4-carbonyl]-4H-1,4-benzoxazin-3-one —— C22H28N2O5
    6-[1-[(1R,3S)-3-methoxycyclohexanecarbonyl]piperidine-4-carbonyl]-4H-1,4-benzoxazin-3-one
    —— (1'R,2S,2'S,4'R)-7-methoxy-4-oxo-N-(pyridin-2-ylmethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C23H25N3O4
    (1'R,2S,2'S,4'R)-7-methoxy-4-oxo-N-(pyridin-2-ylmethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,2'R,4'R)-N-[2-(4-ethylpiperazin-1-yl)ethyl]-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C24H34N4O3
    (1'R,2S,2'R,4'R)-N-[2-(4-ethylpiperazin-1-yl)ethyl]-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,2'S,4'R)-7-methoxy-4-oxo-N-(pyridin-3-ylmethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C23H25N3O4
    (1'R,2S,2'S,4'R)-7-methoxy-4-oxo-N-(pyridin-3-ylmethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2R,4'R,5'S)-5'-[(4aS,8aS)-4-oxo-2,3,4a,5,6,7,8,8a-octahydroquinoline-1-carbonyl]spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C25H30N2O4
    (1'R,2R,4'R,5'S)-5'-[(4aS,8aS)-4-oxo-2,3,4a,5,6,7,8,8a-octahydroquinoline-1-carbonyl]spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one
    —— (1'S,2S,2'S,4'S)-1'-methyl-4-oxo-N-(2-pyrrolidin-1-ylethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C23H31N3O3
    (1'S,2S,2'S,4'S)-1'-methyl-4-oxo-N-(2-pyrrolidin-1-ylethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,4'R,5'R)-5'-[4-(2-methoxyethyl)piperazine-1-carbonyl]spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C23H31N3O4
    (1'R,2S,4'R,5'R)-5'-[4-(2-methoxyethyl)piperazine-1-carbonyl]spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one
    —— (1'R,2S,2'S,4'R)-N-(5-methyl-1,3-thiazol-2-yl)-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C20H21N3O3S
    (1'R,2S,2'S,4'R)-N-(5-methyl-1,3-thiazol-2-yl)-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,4'R,5'S)-5'-(4-piperidin-1-ylpiperidine-1-carbonyl)spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C26H35N3O3
    (1'R,2S,4'R,5'S)-5'-(4-piperidin-1-ylpiperidine-1-carbonyl)spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one
    —— (1'R,2S,2'R,4'R)-7-methoxy-N-methyl-4-oxo-N-(2-pyridin-2-ylethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C25H29N3O4
    (1'R,2S,2'R,4'R)-7-methoxy-N-methyl-4-oxo-N-(2-pyridin-2-ylethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'S,2S,2'S,4'S)-1'-methyl-N-(3-morpholin-4-ylpropyl)-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C24H33N3O4
    (1'S,2S,2'S,4'S)-1'-methyl-N-(3-morpholin-4-ylpropyl)-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2R,4'R,5'S)-7-methoxy-5'-(piperidine-1-carbonyl)spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C22H28N2O4
    (1'R,2R,4'R,5'S)-7-methoxy-5'-(piperidine-1-carbonyl)spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one
    —— (1'R,2S,4'R,5'R)-5'-(4-acetyl-1,4-diazepane-1-carbonyl)spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C23H29N3O4
    (1'R,2S,4'R,5'R)-5'-(4-acetyl-1,4-diazepane-1-carbonyl)spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one
    —— (1'R,2S,2'S,4'R)-N-(3-methoxypropyl)-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C20H26N2O4
    (1'R,2S,2'S,4'R)-N-(3-methoxypropyl)-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2R,2'S,4'R)-N-[(3S,4R)-4-hydroxythiolan-3-yl]-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C20H24N2O4S
    (1'R,2R,2'S,4'R)-N-[(3S,4R)-4-hydroxythiolan-3-yl]-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,4'R,5'S)-5'-[(3S)-3-(hydroxymethyl)piperidine-1-carbonyl]-7-methoxyspiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C23H30N2O5
    (1'R,2S,4'R,5'S)-5'-[(3S)-3-(hydroxymethyl)piperidine-1-carbonyl]-7-methoxyspiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one
    —— (1'R,2S,2'S,4'R)-N-[2-(4-ethylpiperazin-1-yl)ethyl]-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C24H34N4O3
    (1'R,2S,2'S,4'R)-N-[2-(4-ethylpiperazin-1-yl)ethyl]-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,2'S,4'R)-N-[2-(3,5-dimethylpyrazol-1-yl)ethyl]-7-methoxy-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C24H30N4O4
    (1'R,2S,2'S,4'R)-N-[2-(3,5-dimethylpyrazol-1-yl)ethyl]-7-methoxy-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,2'S,4'R)-N-[(3S)-1-azabicyclo[2.2.2]octan-3-yl]-7-methoxy-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C24H31N3O4
    (1'R,2S,2'S,4'R)-N-[(3S)-1-azabicyclo[2.2.2]octan-3-yl]-7-methoxy-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,2'R,4'R)-N-[3-(diethylamino)propyl]-7-methoxy-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C24H35N3O4
    (1'R,2S,2'R,4'R)-N-[3-(diethylamino)propyl]-7-methoxy-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,2'S,4'R)-1'-methyl-4-oxo-N-(2-pyridin-4-ylethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C24H27N3O3
    (1'R,2S,2'S,4'R)-1'-methyl-4-oxo-N-(2-pyridin-4-ylethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,4'R,5'S)-5'-[(4aS,8aS)-4-oxo-2,3,4a,5,6,7,8,8a-octahydroquinoline-1-carbonyl]spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C25H30N2O4
    (1'R,2S,4'R,5'S)-5'-[(4aS,8aS)-4-oxo-2,3,4a,5,6,7,8,8a-octahydroquinoline-1-carbonyl]spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one
    —— (1'R,2S,2'R,4'R)-N-[(3,4-dimethoxyphenyl)methyl]-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C25H28N2O5
    (1'R,2S,2'R,4'R)-N-[(3,4-dimethoxyphenyl)methyl]-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,2'R,4'R)-7-methoxy-4-oxo-N-propan-2-ylspiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C20H26N2O4
    (1'R,2S,2'R,4'R)-7-methoxy-4-oxo-N-propan-2-ylspiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,2'R,4'R)-7-methoxy-N-[2-(5-methylpyrazol-1-yl)ethyl]-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C23H28N4O4
    (1'R,2S,2'R,4'R)-7-methoxy-N-[2-(5-methylpyrazol-1-yl)ethyl]-4-oxospiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,2'S,4'R)-4-oxo-N-(pyridin-2-ylmethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C22H23N3O3
    (1'R,2S,2'S,4'R)-4-oxo-N-(pyridin-2-ylmethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2R,2'S,4'R)-4-oxo-N-(pyridin-2-ylmethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide —— C22H23N3O3
    (1'R,2R,2'S,4'R)-4-oxo-N-(pyridin-2-ylmethyl)spiro[3H-1,3-benzoxazine-2,5'-bicyclo[2.2.2]octane]-2'-carboxamide
    —— (1'R,2S,4'R,5'R)-7-methoxy-5'-(4-methylpiperidine-1-carbonyl)spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one —— C23H30N2O4
    (1'R,2S,4'R,5'R)-7-methoxy-5'-(4-methylpiperidine-1-carbonyl)spiro[3H-1,3-benzoxazine-2,2'-bicyclo[2.2.2]octane]-4-one