![2-[[4-(piperidinomethyl)-2-thienyl]methyl]-3,4,6,7,8,9a-hexahydro-1H-pyrazino[1,2-a]pyrazin-9-one](http://zinc12.docking.org/img/rings/400764.gif)
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![2-(1-benzyl-4-piperidyl)-3,4,6,7,8,9a-hexahydro-1H-pyrazino[1,2-a]pyrazin-9-one](http://zinc12.docking.org/img/rings/420034.gif)
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![2-[2-(2-pyridyl)pyrimidine-5-carbonyl]-3,4,6,7,8,9a-hexahydro-1H-pyrazino[1,2-a]pyrazin-9-one](http://zinc12.docking.org/img/rings/420395.gif)
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![2-(4-piperazinobenzoyl)-3,4,6,7,8,9a-hexahydro-1H-pyrazino[1,2-a]pyrazin-9-one](http://zinc12.docking.org/img/rings/407759.gif)
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![8-[4-(2-ketopyrrolidino)benzoyl]-3,4,6,7,9,9a-hexahydro-2H-pyrazino[1,2-a]pyrazin-1-one](http://zinc12.docking.org/img/rings/419215.gif)
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![2-[(1-besylpyrrol-2-yl)methyl]-3,4,6,7,8,9a-hexahydro-1H-pyrazino[1,2-a]pyrazin-9-one](http://zinc12.docking.org/img/rings/408061.gif)
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![8-[3-(3-phenyl-1,2,4-oxadiazol-5-yl)propanoyl]-3,4,6,7,9,9a-hexahydro-2H-pyrazino[1,2-a]pyrazin-1-one](http://zinc12.docking.org/img/rings/405849.gif)
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![2-[3-(2-pyridylmethoxy)benzyl]-3,4,6,7,8,9a-hexahydro-1H-pyrazino[1,2-a]pyrazin-9-one](http://zinc12.docking.org/img/rings/398515.gif)
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![2-(3-benzoxybenzyl)-3,4,6,7,8,9a-hexahydro-1H-pyrazino[1,2-a]pyrazin-9-one](http://zinc12.docking.org/img/rings/406386.gif)
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![N-[3-(9-keto-3,4,6,7,8,9a-hexahydro-1H-pyrazino[1,2-a]pyrazine-2-carbonyl)phenyl]-2-furamide](http://zinc12.docking.org/img/rings/416172.gif)
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![2-(BLAHcarbonyl)-3,4,6,7,8,9a-hexahydro-1H-pyrazino[1,2-a]pyrazin-9-one](http://zinc12.docking.org/img/rings/405966.gif)
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![2-(6,7,8,9-tetrahydro-5H-carbazole-2-carbonyl)-3,4,6,7,8,9a-hexahydro-1H-pyrazino[1,2-a]pyrazin-9-one](http://zinc12.docking.org/img/rings/611813.gif)
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