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    —— (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-5-[4-(2-methylpropyl)phenyl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C25H31N5O2
    (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-5-[4-(2-methylpropyl)phenyl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-5-(3,5-difluorophenyl)-2-[(3R,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H21F2N5O2
    (5R,6S)-5-(3,5-difluorophenyl)-2-[(3R,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-5-(3-phenoxyphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C27H27N5O3
    (5R,6S)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-5-(3-phenoxyphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-5-(3-phenoxyphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C27H27N5O3
    (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-5-(3-phenoxyphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5S,6S)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-5-(2-fluoro-5-nitrophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H21FN6O4
    (5S,6S)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-5-(2-fluoro-5-nitrophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-5-(2-methoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C22H25N5O3
    (5R,6S)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-5-(2-methoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-5-(3,4-dimethoxyphenyl)-2-[(3R,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C23H27N5O4
    (5R,6S)-5-(3,4-dimethoxyphenyl)-2-[(3R,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-5-(2,4-dimethoxyphenyl)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C23H27N5O4
    (5R,6S)-5-(2,4-dimethoxyphenyl)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5S,6R)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-5-(2-ethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C23H27N5O3
    (5S,6R)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-5-(2-ethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6R)-5-[4-(diethylamino)phenyl]-2-[(3R,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C25H32N6O2
    (5R,6R)-5-[4-(diethylamino)phenyl]-2-[(3R,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-5-(3,4-dimethoxyphenyl)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C23H27N5O4
    (5R,6S)-5-(3,4-dimethoxyphenyl)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-5-[4-(2-methylpropyl)phenyl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C25H31N5O2
    (5R,6S)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-5-[4-(2-methylpropyl)phenyl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-5-[4-(dimethylamino)phenyl]-2-[(3S)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C22H26N6O2
    (5R,6S)-5-[4-(dimethylamino)phenyl]-2-[(3S)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3S)-3-methylpiperidin-1-yl]-5-(4-nitrophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C20H20N6O4
    (5R,6S)-2-[(3S)-3-methylpiperidin-1-yl]-5-(4-nitrophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-5-(3-bromophenyl)-2-[(3S)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C20H20BrN5O2
    (5R,6S)-5-(3-bromophenyl)-2-[(3S)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-5-(2-hydroxy-3-methoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C22H25N5O4
    (5R,6S)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-5-(2-hydroxy-3-methoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-5-(2-hydroxy-3-methoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C22H25N5O4
    (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-5-(2-hydroxy-3-methoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-5-(3-bromophenyl)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H22BrN5O2
    (5R,6S)-5-(3-bromophenyl)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5S,6S)-5-[(1R)-cyclohex-3-en-1-yl]-2-[(3R,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H27N5O2
    (5S,6S)-5-[(1R)-cyclohex-3-en-1-yl]-2-[(3R,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3R,5S)-3,5-dimethylpiperidin-1-yl]-5-(4-methylsulfanylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C22H25N5O2S
    (5R,6S)-2-[(3R,5S)-3,5-dimethylpiperidin-1-yl]-5-(4-methylsulfanylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-5-(3-bromophenyl)-2-[(3R,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H22BrN5O2
    (5R,6S)-5-(3-bromophenyl)-2-[(3R,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5S,6S)-5-(2,4-dichlorophenyl)-2-[(3R)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C20H19Cl2N5O2
    (5S,6S)-5-(2,4-dichlorophenyl)-2-[(3R)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-5-(2-prop-2-enoxyphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C24H27N5O3
    (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-5-(2-prop-2-enoxyphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-5-(1H-indol-3-yl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C23H24N6O2
    (5R,6S)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-5-(1H-indol-3-yl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-5-(3-methoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C22H25N5O3
    (5R,6S)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-5-(3-methoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5S,6S)-5-(2-chlorophenyl)-2-[(3R)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C20H20ClN5O2
    (5S,6S)-5-(2-chlorophenyl)-2-[(3R)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-5-(3-bromophenyl)-2-[(3R)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C20H20BrN5O2
    (5R,6S)-5-(3-bromophenyl)-2-[(3R)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3R)-3-methylpiperidin-1-yl]-5-(2-nitrophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C20H20N6O4
    (5R,6S)-2-[(3R)-3-methylpiperidin-1-yl]-5-(2-nitrophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-5-(3,4-dimethoxyphenyl)-2-[(3R)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C22H25N5O4
    (5R,6S)-5-(3,4-dimethoxyphenyl)-2-[(3R)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-5-(4-methylsulfanylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C22H25N5O2S
    (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-5-(4-methylsulfanylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-5-(4-methylsulfanylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C22H25N5O2S
    (5R,6S)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-5-(4-methylsulfanylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-5-(2-hydroxynaphthalen-1-yl)-2-[(3S)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C24H23N5O3
    (5R,6S)-5-(2-hydroxynaphthalen-1-yl)-2-[(3S)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-5-(3-methoxyphenyl)-2-[(3S)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H23N5O3
    (5R,6S)-5-(3-methoxyphenyl)-2-[(3S)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5S,6S)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-5-(2-fluorophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H22FN5O2
    (5S,6S)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-5-(2-fluorophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-5-(4-bromophenyl)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H22BrN5O2
    (5R,6S)-5-(4-bromophenyl)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5S,6S)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-5-(4-ethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C23H27N5O3
    (5S,6S)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-5-(4-ethoxyphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-5-(2-nitrophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H22N6O4
    (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-5-(2-nitrophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-5-(1H-indol-3-yl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C23H24N6O2
    (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-5-(1H-indol-3-yl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5S,6R)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-5-(3-methylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C22H25N5O2
    (5S,6R)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-5-(3-methylphenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5S,6S)-5-(2-chloro-6-fluorophenyl)-2-[(3R,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H21ClFN5O2
    (5S,6S)-5-(2-chloro-6-fluorophenyl)-2-[(3R,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-5-(3,5-difluorophenyl)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H21F2N5O2
    (5R,6S)-5-(3,5-difluorophenyl)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5S,6S)-5-(2-chloro-6-fluorophenyl)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H21ClFN5O2
    (5S,6S)-5-(2-chloro-6-fluorophenyl)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5S,6S)-5-(2-chloro-5-nitrophenyl)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H21ClN6O4
    (5S,6S)-5-(2-chloro-5-nitrophenyl)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5S,6S)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-5-(furan-2-yl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C19H21N5O3
    (5S,6S)-2-[(3S,5R)-3,5-dimethylpiperidin-1-yl]-5-(furan-2-yl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— [5-(Furan-2-yl)-1,2-oxazol-3-yl]methyl 4-(dimethylamino)-3-nitrobenzoate —— C17H15N3O6
    [5-(Furan-2-yl)-1,2-oxazol-3-yl]methyl 4-(dimethylamino)-3-nitrobenzoate
    —— (5R,6R)-5-[4-(diethylamino)phenyl]-2-[(3S)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C24H30N6O2
    (5R,6R)-5-[4-(diethylamino)phenyl]-2-[(3S)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5S,6S)-5-[4-(diethylamino)phenyl]-2-[(3S)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C24H30N6O2
    (5S,6S)-5-[4-(diethylamino)phenyl]-2-[(3S)-3-methylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-5-(4-nitrophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C21H22N6O4
    (5R,6S)-2-[(3R,5R)-3,5-dimethylpiperidin-1-yl]-5-(4-nitrophenyl)-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-5-(2,5-dimethoxyphenyl)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C23H27N5O4
    (5R,6S)-5-(2,5-dimethoxyphenyl)-2-[(3S,5S)-3,5-dimethylpiperidin-1-yl]-4,7-dioxo-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile
    —— (5R,6S)-2-[(3R)-3-methylpiperidin-1-yl]-4,7-dioxo-5-(3,4,5-trimethoxyphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile —— C23H27N5O5
    (5R,6S)-2-[(3R)-3-methylpiperidin-1-yl]-4,7-dioxo-5-(3,4,5-trimethoxyphenyl)-1,5,6,8-tetrahydropyrido[2,3-d]pyrimidine-6-carbonitrile