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    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[2-(furan-2-yl)-1,3-thiazol-4-yl]methanone —— C16H19N3O2S
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[2-(furan-2-yl)-1,3-thiazol-4-yl]methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[5-methyl-1-(3-methylphenyl)triazol-4-yl]methanone —— C19H25N5O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[5-methyl-1-(3-methylphenyl)triazol-4-yl]methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-tert-butyl-5-methylpyrazol-4-yl)methanone —— C17H28N4O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-tert-butyl-5-methylpyrazol-4-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[(3S)-1-pyrimidin-2-ylpiperidin-3-yl]methanone —— C18H27N5O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[(3S)-1-pyrimidin-2-ylpiperidin-3-yl]methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-methoxyisoquinolin-3-yl)methanone —— C19H23N3O2
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-methoxyisoquinolin-3-yl)methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[1-(4-fluorophenyl)pyrazol-3-yl]methanone —— C18H21FN4O
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[1-(4-fluorophenyl)pyrazol-3-yl]methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[2-(5-methylfuran-2-yl)-1,3-thiazol-4-yl]methanone —— C17H21N3O2S
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[2-(5-methylfuran-2-yl)-1,3-thiazol-4-yl]methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[(2R,3R)-2-phenyloxan-3-yl]methanone —— C20H28N2O2
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[(2R,3R)-2-phenyloxan-3-yl]methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[1-(4-methoxyphenyl)pyrazol-3-yl]methanone —— C19H24N4O2
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[1-(4-methoxyphenyl)pyrazol-3-yl]methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(2-tert-butyl-1,3-thiazol-5-yl)methanone —— C16H25N3OS
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(2-tert-butyl-1,3-thiazol-5-yl)methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[1-(4-methoxyphenyl)pyrazol-3-yl]methanone —— C19H24N4O2
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[1-(4-methoxyphenyl)pyrazol-3-yl]methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(6-imidazol-1-ylpyridin-3-yl)methanone —— C17H21N5O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(6-imidazol-1-ylpyridin-3-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[(2S,3S)-2-phenyloxan-3-yl]methanone —— C20H28N2O2
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[(2S,3S)-2-phenyloxan-3-yl]methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(5-methyl-2-thiophen-2-yl-1,3-oxazol-4-yl)methanone —— C17H21N3O2S
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(5-methyl-2-thiophen-2-yl-1,3-oxazol-4-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-tert-butyl-5-methylpyrazol-3-yl)methanone —— C17H28N4O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-tert-butyl-5-methylpyrazol-3-yl)methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[2-(1,2,4-triazol-1-yl)pyridin-4-yl]methanone —— C16H20N6O
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[2-(1,2,4-triazol-1-yl)pyridin-4-yl]methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[3-(tetrazol-1-yl)thiophen-2-yl]methanone —— C14H18N6OS
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[3-(tetrazol-1-yl)thiophen-2-yl]methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(3-phenyl-1,2-oxazol-5-yl)methanone —— C18H21N3O2
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(3-phenyl-1,2-oxazol-5-yl)methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(4-bromothiophen-2-yl)methanone —— C13H17BrN2OS
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(4-bromothiophen-2-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(2-pyrazol-1-ylpyridin-3-yl)methanone —— C17H21N5O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(2-pyrazol-1-ylpyridin-3-yl)methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(5,7-dimethoxy-1H-indol-2-yl)methanone —— C19H25N3O3
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(5,7-dimethoxy-1H-indol-2-yl)methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(4-bromo-5-methyl-1H-pyrazol-3-yl)methanone —— C13H19BrN4O
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(4-bromo-5-methyl-1H-pyrazol-3-yl)methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(5-methyl-1-phenyltriazol-4-yl)methanone —— C18H23N5O
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(5-methyl-1-phenyltriazol-4-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-methoxyisoquinolin-3-yl)methanone —— C19H23N3O2
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-methoxyisoquinolin-3-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[5-methyl-1-(4-methylphenyl)triazol-4-yl]methanone —— C19H25N5O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[5-methyl-1-(4-methylphenyl)triazol-4-yl]methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[2-(furan-2-yl)-5-methyl-1,3-thiazol-4-yl]methanone —— C17H21N3O2S
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[2-(furan-2-yl)-5-methyl-1,3-thiazol-4-yl]methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-pyrimidin-2-ylpiperidin-4-yl)methanone —— C18H27N5O
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-pyrimidin-2-ylpiperidin-4-yl)methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(2-pyrimidin-2-yl-1,3-thiazol-4-yl)methanone —— C16H19N5OS
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(2-pyrimidin-2-yl-1,3-thiazol-4-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(2-pyrimidin-2-yl-1,3-thiazol-4-yl)methanone —— C16H19N5OS
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(2-pyrimidin-2-yl-1,3-thiazol-4-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-benzyl-5-methylpyrazol-4-yl)methanone —— C20H26N4O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-benzyl-5-methylpyrazol-4-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(4-fluoro-1H-indol-2-yl)methanone —— C17H20FN3O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(4-fluoro-1H-indol-2-yl)methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(4,5-dichloro-1-methylpyrrol-2-yl)methanone —— C14H19Cl2N3O
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(4,5-dichloro-1-methylpyrrol-2-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(4,5-dichloro-1-methylpyrrol-2-yl)methanone —— C14H19Cl2N3O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(4,5-dichloro-1-methylpyrrol-2-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(5-chloro-2-pyrrolidin-1-ylpyrimidin-4-yl)methanone —— C17H24ClN5O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(5-chloro-2-pyrrolidin-1-ylpyrimidin-4-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-tert-butyl-3,5-dimethylpyrazol-4-yl)methanone —— C18H30N4O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-tert-butyl-3,5-dimethylpyrazol-4-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[(3R)-2,3-dihydro-1,4-benzodioxin-3-yl]methanone —— C17H22N2O3
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[(3R)-2,3-dihydro-1,4-benzodioxin-3-yl]methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(4-bromo-5-methyl-1H-pyrazol-3-yl)methanone —— C13H19BrN4O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(4-bromo-5-methyl-1H-pyrazol-3-yl)methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[4-(4-fluorophenyl)oxan-4-yl]methanone —— C20H27FN2O2
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[4-(4-fluorophenyl)oxan-4-yl]methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[(3R)-1-pyrimidin-2-ylpiperidin-3-yl]methanone —— C18H27N5O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[(3R)-1-pyrimidin-2-ylpiperidin-3-yl]methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(5-methyl-2-thiophen-2-yl-1,3-oxazol-4-yl)methanone —— C17H21N3O2S
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(5-methyl-2-thiophen-2-yl-1,3-oxazol-4-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-methyl-3-pyridin-3-ylpyrazol-4-yl)methanone —— C18H23N5O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(1-methyl-3-pyridin-3-ylpyrazol-4-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[4-(2-methylphenyl)oxan-4-yl]methanone —— C21H30N2O2
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[4-(2-methylphenyl)oxan-4-yl]methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[(3S)-2,3-dihydro-1,4-benzodioxin-3-yl]methanone —— C17H22N2O3
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[(3S)-2,3-dihydro-1,4-benzodioxin-3-yl]methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(2-morpholin-4-ylpyridin-3-yl)methanone —— C18H26N4O2
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(2-morpholin-4-ylpyridin-3-yl)methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(5-chloro-2-pyrrolidin-1-ylpyrimidin-4-yl)methanone —— C17H24ClN5O
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(5-chloro-2-pyrrolidin-1-ylpyrimidin-4-yl)methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(2-tert-butyl-1,3-thiazol-5-yl)methanone —— C16H25N3OS
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(2-tert-butyl-1,3-thiazol-5-yl)methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[2-(5-methylfuran-2-yl)-1,3-thiazol-4-yl]methanone —— C17H21N3O2S
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[2-(5-methylfuran-2-yl)-1,3-thiazol-4-yl]methanone
    —— [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[2-(1,2,4-triazol-1-yl)pyridin-4-yl]methanone —— C16H20N6O
    [(9aR)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[2-(1,2,4-triazol-1-yl)pyridin-4-yl]methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(5-chloro-2-propan-2-ylpyrimidin-4-yl)methanone —— C16H23ClN4O
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-(5-chloro-2-propan-2-ylpyrimidin-4-yl)methanone
    —— [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[1-(thiophen-2-ylmethyl)pyrrol-2-yl]methanone —— C18H23N3OS
    [(9aS)-1,3,4,6,7,8,9,9a-octahydropyrido[1,2-a]pyrazin-2-yl]-[1-(thiophen-2-ylmethyl)pyrrol-2-yl]methanone