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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 氮杂螺癸烷衍生物

    氮杂螺癸烷衍生物

    中文名称 英文名称 CAS号 化学式 结构式图片
    —— 1-[(3R)-5-(2,4-dimethoxyphenyl)-3-(2,5-dimethoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C28H35N3O7
    1-[(3R)-5-(2,4-dimethoxyphenyl)-3-(2,5-dimethoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3R)-3-(4-fluorophenyl)-5-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]ethanone —— C25H28FN3O3
    2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3R)-3-(4-fluorophenyl)-5-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]ethanone
    —— 1-[(3R)-5-(2,4-dimethylphenyl)-3-(2-fluorophenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C26H30FN3O3
    1-[(3R)-5-(2,4-dimethylphenyl)-3-(2-fluorophenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3R)-3-(4-chlorophenyl)-5-(3-methylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C25H28ClN3O3
    1-[(3R)-3-(4-chlorophenyl)-5-(3-methylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-3-(3-fluorophenyl)-5-(2-methoxyphenyl)-3,4-dihydropyrazol-2-yl]ethanone —— C25H28FN3O4
    2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-3-(3-fluorophenyl)-5-(2-methoxyphenyl)-3,4-dihydropyrazol-2-yl]ethanone
    —— 1-[(3R)-3-(2,5-dimethylphenyl)-5-(2-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C27H33N3O4
    1-[(3R)-3-(2,5-dimethylphenyl)-5-(2-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-3-(4-fluorophenyl)-5-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]ethanone —— C25H28FN3O3
    2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-3-(4-fluorophenyl)-5-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]ethanone
    —— 1-[(3R)-5-(2,5-dimethylphenyl)-3-(2-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C27H33N3O4
    1-[(3R)-5-(2,5-dimethylphenyl)-3-(2-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3S)-5-(2,4-dimethoxyphenyl)-3-(2-methylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C27H33N3O5
    1-[(3S)-5-(2,4-dimethoxyphenyl)-3-(2-methylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3R)-3-(3-fluorophenyl)-5-(2-methoxyphenyl)-3,4-dihydropyrazol-2-yl]ethanone —— C25H28FN3O4
    2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3R)-3-(3-fluorophenyl)-5-(2-methoxyphenyl)-3,4-dihydropyrazol-2-yl]ethanone
    —— 1-[(3S)-3-(2,5-dimethylphenyl)-5-phenyl-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C26H31N3O3
    1-[(3S)-3-(2,5-dimethylphenyl)-5-phenyl-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3R)-5-(3,4-dimethylphenyl)-3-(4-ethoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C28H35N3O4
    1-[(3R)-5-(3,4-dimethylphenyl)-3-(4-ethoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3S)-3-(2,4-dimethoxyphenyl)-5-(2,4-dimethylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C28H35N3O5
    1-[(3S)-3-(2,4-dimethoxyphenyl)-5-(2,4-dimethylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-3-(2-methoxyphenyl)-5-(3-methylphenyl)-3,4-dihydropyrazol-2-yl]ethanone —— C26H31N3O4
    2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-3-(2-methoxyphenyl)-5-(3-methylphenyl)-3,4-dihydropyrazol-2-yl]ethanone
    —— 1-[(3S)-3-(2,5-dimethylphenyl)-5-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C27H33N3O3
    1-[(3S)-3-(2,5-dimethylphenyl)-5-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3R)-5-(2,4-dimethylphenyl)-3-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C27H33N3O4
    1-[(3R)-5-(2,4-dimethylphenyl)-3-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3R)-5-(2,5-dimethylphenyl)-3-(3-fluorophenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C26H30FN3O3
    1-[(3R)-5-(2,5-dimethylphenyl)-3-(3-fluorophenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3S)-5-(2,4-dimethylphenyl)-3-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C27H33N3O4
    1-[(3S)-5-(2,4-dimethylphenyl)-3-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3R)-5-(2-methoxyphenyl)-3-phenyl-3,4-dihydropyrazol-2-yl]ethanone —— C25H29N3O4
    2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3R)-5-(2-methoxyphenyl)-3-phenyl-3,4-dihydropyrazol-2-yl]ethanone
    —— 2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-5-(3-methylphenyl)-3-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]ethanone —— C26H31N3O3
    2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-5-(3-methylphenyl)-3-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]ethanone
    —— 2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-3-(3-fluorophenyl)-5-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]ethanone —— C25H28FN3O4
    2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-3-(3-fluorophenyl)-5-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]ethanone
    —— 1-[(3S)-5-(2,4-dimethoxyphenyl)-3-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C27H33N3O6
    1-[(3S)-5-(2,4-dimethoxyphenyl)-3-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3S)-5-(2,4-dimethylphenyl)-3-(2-methylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C27H33N3O3
    1-[(3S)-5-(2,4-dimethylphenyl)-3-(2-methylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3R)-3-(2-chlorophenyl)-5-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C25H28ClN3O3
    1-[(3R)-3-(2-chlorophenyl)-5-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3R)-5-(3,4-dimethylphenyl)-3-(2-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C27H33N3O4
    1-[(3R)-5-(3,4-dimethylphenyl)-3-(2-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3R)-3-(4-fluorophenyl)-5-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]ethanone —— C25H28FN3O4
    2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3R)-3-(4-fluorophenyl)-5-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]ethanone
    —— 1-[(3S)-3-(2-chlorophenyl)-5-(2,4-dimethylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C26H30ClN3O3
    1-[(3S)-3-(2-chlorophenyl)-5-(2,4-dimethylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3S)-3-(2,4-dimethoxyphenyl)-5-(3,4-dimethylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C28H35N3O5
    1-[(3S)-3-(2,4-dimethoxyphenyl)-5-(3,4-dimethylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3S)-3-(4-chlorophenyl)-5-(2-fluorophenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C24H25ClFN3O3
    1-[(3S)-3-(4-chlorophenyl)-5-(2-fluorophenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3S)-5-(3,4-dimethylphenyl)-3-(2-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C27H33N3O4
    1-[(3S)-5-(3,4-dimethylphenyl)-3-(2-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-3-(4-ethoxyphenyl)-5-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]ethanone —— C27H33N3O4
    2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-3-(4-ethoxyphenyl)-5-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]ethanone
    —— 1-[(3R)-5-(2,4-dimethoxyphenyl)-3-phenyl-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C26H31N3O5
    1-[(3R)-5-(2,4-dimethoxyphenyl)-3-phenyl-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-3-(4-ethoxyphenyl)-5-(4-fluorophenyl)-3,4-dihydropyrazol-2-yl]ethanone —— C26H30FN3O4
    2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-3-(4-ethoxyphenyl)-5-(4-fluorophenyl)-3,4-dihydropyrazol-2-yl]ethanone
    —— 1-[(3S)-3-(2,4-dimethoxyphenyl)-5-phenyl-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C26H31N3O5
    1-[(3S)-3-(2,4-dimethoxyphenyl)-5-phenyl-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3R)-3-(2,4-dimethoxyphenyl)-5-(3,4-dimethylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C28H35N3O5
    1-[(3R)-3-(2,4-dimethoxyphenyl)-5-(3,4-dimethylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3S)-3-(4-chlorophenyl)-5-(3-methylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C25H28ClN3O3
    1-[(3S)-3-(4-chlorophenyl)-5-(3-methylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3R)-3-(2,5-dimethylphenyl)-5-phenyl-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C26H31N3O3
    1-[(3R)-3-(2,5-dimethylphenyl)-5-phenyl-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3R)-5-(4-fluorophenyl)-3-(1-methylpyrrol-2-yl)-3,4-dihydropyrazol-2-yl]ethanone —— C23H27FN4O3
    2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3R)-5-(4-fluorophenyl)-3-(1-methylpyrrol-2-yl)-3,4-dihydropyrazol-2-yl]ethanone
    —— 1-[(3S)-3-(2,4-dimethoxyphenyl)-5-(2,5-dimethylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C28H35N3O5
    1-[(3S)-3-(2,4-dimethoxyphenyl)-5-(2,5-dimethylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-5-(4-methylphenyl)-3-phenyl-3,4-dihydropyrazol-2-yl]ethanone —— C25H29N3O3
    2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-5-(4-methylphenyl)-3-phenyl-3,4-dihydropyrazol-2-yl]ethanone
    —— 1-[(3R)-5-(2,5-dimethylphenyl)-3-phenyl-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C26H31N3O3
    1-[(3R)-5-(2,5-dimethylphenyl)-3-phenyl-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3R)-5-(2,4-dimethylphenyl)-3-(3-fluorophenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C26H30FN3O3
    1-[(3R)-5-(2,4-dimethylphenyl)-3-(3-fluorophenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3S)-3-(4-chlorophenyl)-5-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C25H28ClN3O4
    1-[(3S)-3-(4-chlorophenyl)-5-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3R)-3-(2,5-dimethylphenyl)-5-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C27H33N3O3
    1-[(3R)-3-(2,5-dimethylphenyl)-5-(4-methylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3S)-3-(2,5-dimethylphenyl)-5-(4-fluorophenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C26H30FN3O3
    1-[(3S)-3-(2,5-dimethylphenyl)-5-(4-fluorophenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-3-(4-fluorophenyl)-5-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]ethanone —— C25H28FN3O4
    2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)-1-[(3S)-3-(4-fluorophenyl)-5-(4-methoxyphenyl)-3,4-dihydropyrazol-2-yl]ethanone
    —— 1-[(3R)-3-(2,4-dimethoxyphenyl)-5-(4-fluorophenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C26H30FN3O5
    1-[(3R)-3-(2,4-dimethoxyphenyl)-5-(4-fluorophenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3S)-3-(2,5-dimethoxyphenyl)-5-(2-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C27H33N3O6
    1-[(3S)-3-(2,5-dimethoxyphenyl)-5-(2-methoxyphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3R)-3-(2-chlorophenyl)-5-(2,4-dimethylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C26H30ClN3O3
    1-[(3R)-3-(2-chlorophenyl)-5-(2,4-dimethylphenyl)-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone
    —— 1-[(3R)-3-(2,4-dimethoxyphenyl)-5-phenyl-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone —— C26H31N3O5
    1-[(3R)-3-(2,4-dimethoxyphenyl)-5-phenyl-3,4-dihydropyrazol-2-yl]-2-(1,4-dioxa-8-azaspiro[4.5]decan-8-yl)ethanone