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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 吡啶并嘧啶类

    吡啶并嘧啶类

    中文名称 英文名称 CAS号 化学式 结构式图片
    —— ethyl (3S)-1-[(5R,6R)-6-cyano-5-(4-ethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C24H27N5O5
    ethyl (3S)-1-[(5R,6R)-6-cyano-5-(4-ethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— (5S,6S)-5-(4-fluorophenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C19H18FN5O2
    (5S,6S)-5-(4-fluorophenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— ethyl (3S)-1-[(5R,6S)-6-cyano-5-(2,3-dimethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C24H27N5O6
    ethyl (3S)-1-[(5R,6S)-6-cyano-5-(2,3-dimethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3S)-1-[(5R,6S)-6-cyano-5-(4-methoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C23H25N5O5
    ethyl (3S)-1-[(5R,6S)-6-cyano-5-(4-methoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3S)-1-[(5R,6R)-6-cyano-5-(2-ethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C24H27N5O5
    ethyl (3S)-1-[(5R,6R)-6-cyano-5-(2-ethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3S)-1-[(5R,6S)-6-cyano-4,7-dioxo-5-(2,4,5-trimethoxyphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C25H29N5O7
    ethyl (3S)-1-[(5R,6S)-6-cyano-4,7-dioxo-5-(2,4,5-trimethoxyphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3S)-1-[(5S,6S)-5-(2-chlorophenyl)-6-cyano-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C22H22ClN5O4
    ethyl (3S)-1-[(5S,6S)-5-(2-chlorophenyl)-6-cyano-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3S)-1-[(5S,6R)-6-cyano-5-(2-ethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C24H27N5O5
    ethyl (3S)-1-[(5S,6R)-6-cyano-5-(2-ethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3R)-1-[(5R,6S)-6-cyano-4,7-dioxo-5-(4-propan-2-ylphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C25H29N5O4
    ethyl (3R)-1-[(5R,6S)-6-cyano-4,7-dioxo-5-(4-propan-2-ylphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3R)-1-[(5R,6S)-6-cyano-4,7-dioxo-5-(3,4,5-trimethoxyphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C25H29N5O7
    ethyl (3R)-1-[(5R,6S)-6-cyano-4,7-dioxo-5-(3,4,5-trimethoxyphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3R)-1-[(5R,6S)-6-cyano-5-(4-methoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C23H25N5O5
    ethyl (3R)-1-[(5R,6S)-6-cyano-5-(4-methoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3R)-1-[(5S,6S)-6-cyano-4,7-dioxo-5-pyridin-2-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C21H22N6O4
    ethyl (3R)-1-[(5S,6S)-6-cyano-4,7-dioxo-5-pyridin-2-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3S)-1-[(5R,6S)-6-cyano-5-(3-ethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C24H27N5O5
    ethyl (3S)-1-[(5R,6S)-6-cyano-5-(3-ethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3R)-1-[(5R,6S)-6-cyano-5-[4-(dimethylamino)phenyl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C24H28N6O4
    ethyl (3R)-1-[(5R,6S)-6-cyano-5-[4-(dimethylamino)phenyl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— (5S,6R)-5-(3-chlorophenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C19H18ClN5O2
    (5S,6R)-5-(3-chlorophenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— ethyl (3R)-1-[(5R,6S)-6-cyano-5-(4-methylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C23H25N5O4
    ethyl (3R)-1-[(5R,6S)-6-cyano-5-(4-methylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3S)-1-[(5R,6S)-6-cyano-5-(3,5-difluorophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C22H21F2N5O4
    ethyl (3S)-1-[(5R,6S)-6-cyano-5-(3,5-difluorophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3S)-1-[(5R,6S)-6-cyano-5-(3,4-dimethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C24H27N5O6
    ethyl (3S)-1-[(5R,6S)-6-cyano-5-(3,4-dimethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— (5R,6S)-5-(4-bromophenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C19H18BrN5O2
    (5R,6S)-5-(4-bromophenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— ethyl (3R)-1-[(5R,6S)-6-cyano-4,7-dioxo-5-(2-prop-2-enoxyphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C25H27N5O5
    ethyl (3R)-1-[(5R,6S)-6-cyano-4,7-dioxo-5-(2-prop-2-enoxyphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3R)-1-[(5R,6S)-6-cyano-5-[4-(2-methylpropyl)phenyl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C26H31N5O4
    ethyl (3R)-1-[(5R,6S)-6-cyano-5-[4-(2-methylpropyl)phenyl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— (5R,6R)-5-(4-methylphenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C20H21N5O2
    (5R,6R)-5-(4-methylphenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5S,6S)-5-(3-ethoxyphenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H23N5O3
    (5S,6S)-5-(3-ethoxyphenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— ethyl (3S)-1-[(5S,6S)-6-cyano-5-(4-ethylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C24H27N5O4
    ethyl (3S)-1-[(5S,6S)-6-cyano-5-(4-ethylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— (5R,6R)-5-(3-bromophenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C19H18BrN5O2
    (5R,6R)-5-(3-bromophenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5S,6R)-5-(4-fluorophenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C19H18FN5O2
    (5S,6R)-5-(4-fluorophenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— ethyl (3S)-1-[(5S,6S)-6-cyano-5-(2-ethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C24H27N5O5
    ethyl (3S)-1-[(5S,6S)-6-cyano-5-(2-ethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— (5S,6S)-5-(3,4-dimethoxyphenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H23N5O4
    (5S,6S)-5-(3,4-dimethoxyphenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— ethyl (3S)-1-[(5R,6S)-6-cyano-5-[4-(diethylamino)phenyl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C26H32N6O4
    ethyl (3S)-1-[(5R,6S)-6-cyano-5-[4-(diethylamino)phenyl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3S)-1-[(5S,6S)-6-cyano-5-(furan-2-yl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C20H21N5O5
    ethyl (3S)-1-[(5S,6S)-6-cyano-5-(furan-2-yl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3R)-1-[(5S,6S)-6-cyano-4,7-dioxo-5-[(E)-2-phenylethenyl]-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C24H25N5O4
    ethyl (3R)-1-[(5S,6S)-6-cyano-4,7-dioxo-5-[(E)-2-phenylethenyl]-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3R)-1-[(5R,6S)-6-cyano-4,7-dioxo-5-pyridin-3-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C21H22N6O4
    ethyl (3R)-1-[(5R,6S)-6-cyano-4,7-dioxo-5-pyridin-3-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3R)-1-[(5S,6S)-6-cyano-5-(furan-2-yl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C20H21N5O5
    ethyl (3R)-1-[(5S,6S)-6-cyano-5-(furan-2-yl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3S)-1-[(5R,6S)-6-cyano-4,7-dioxo-5-(4-propan-2-ylphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C25H29N5O4
    ethyl (3S)-1-[(5R,6S)-6-cyano-4,7-dioxo-5-(4-propan-2-ylphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3S)-1-[(5R,6S)-6-cyano-5-(4-ethylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C24H27N5O4
    ethyl (3S)-1-[(5R,6S)-6-cyano-5-(4-ethylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3S)-1-[(5R,6S)-6-cyano-5-(4-methylsulfanylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C23H25N5O4S
    ethyl (3S)-1-[(5R,6S)-6-cyano-5-(4-methylsulfanylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— (5R,6S)-5-(1H-indol-3-yl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H20N6O2
    (5R,6S)-5-(1H-indol-3-yl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— ethyl (3S)-1-[(5R,6R)-6-cyano-5-(4-ethylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C24H27N5O4
    ethyl (3S)-1-[(5R,6R)-6-cyano-5-(4-ethylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3R)-1-[(5R,6S)-5-(4-chlorophenyl)-6-cyano-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C22H22ClN5O4
    ethyl (3R)-1-[(5R,6S)-5-(4-chlorophenyl)-6-cyano-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3R)-1-[(5R,6S)-5-(4-bromophenyl)-6-cyano-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C22H22BrN5O4
    ethyl (3R)-1-[(5R,6S)-5-(4-bromophenyl)-6-cyano-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3S)-1-[(5S,6R)-6-cyano-5-(4-ethylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C24H27N5O4
    ethyl (3S)-1-[(5S,6R)-6-cyano-5-(4-ethylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3R)-1-[(5R,6S)-6-cyano-5-[4-(3-methylbutoxy)phenyl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C27H33N5O5
    ethyl (3R)-1-[(5R,6S)-6-cyano-5-[4-(3-methylbutoxy)phenyl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— (5S,6S)-5-(1H-indol-3-yl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H20N6O2
    (5S,6S)-5-(1H-indol-3-yl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6R)-5-(3-methylphenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C20H21N5O2
    (5R,6R)-5-(3-methylphenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6R)-5-(4-ethylphenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H23N5O2
    (5R,6R)-5-(4-ethylphenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— ethyl (3R)-1-[(5R,6S)-6-cyano-5-(1H-indol-3-yl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C24H24N6O4
    ethyl (3R)-1-[(5R,6S)-6-cyano-5-(1H-indol-3-yl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3S)-1-[(5R,6S)-6-cyano-5-(2-nitrophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C22H22N6O6
    ethyl (3S)-1-[(5R,6S)-6-cyano-5-(2-nitrophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3R)-1-[(5R,6S)-5-(3-bromophenyl)-6-cyano-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C22H22BrN5O4
    ethyl (3R)-1-[(5R,6S)-5-(3-bromophenyl)-6-cyano-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— ethyl (3S)-1-[(5S,6S)-6-cyano-5-(2-fluorophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate —— C22H22FN5O4
    ethyl (3S)-1-[(5S,6S)-6-cyano-5-(2-fluorophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidin-2-yl]piperidine-3-carboxylate
    —— (5S,6R)-5-(4-chlorophenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C19H18ClN5O2
    (5S,6R)-5-(4-chlorophenyl)-4,7-dioxo-2-piperidin-1-yl-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile