![3-(4-pyridylmethyl)-2,4,4a,6-tetrahydro-1H-pyrazino[1,2-a]quinoxalin-5-one](http://zinc12.docking.org/img/rings/197579.gif)
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![3-[2-(2-piperidyl)ethyl]-2,4,4a,6-tetrahydro-1H-pyrazino[1,2-a]quinoxalin-5-one](http://zinc12.docking.org/img/rings/197582.gif)
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![3-[2-(2-pyridyl)ethyl]-2,4,4a,6-tetrahydro-1H-pyrazino[1,2-a]quinoxalin-5-one](http://zinc12.docking.org/img/rings/197584.gif)
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![3-[2-(4-piperidyl)ethyl]-2,4,4a,6-tetrahydro-1H-pyrazino[1,2-a]quinoxalin-5-one](http://zinc12.docking.org/img/rings/197585.gif)
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![3-[2-(4-pyridyl)ethyl]-2,4,4a,6-tetrahydro-1H-pyrazino[1,2-a]quinoxalin-5-one](http://zinc12.docking.org/img/rings/197583.gif)
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![3-[3-(4-pyridyl)propyl]-2,4,4a,6-tetrahydro-1H-pyrazino[1,2-a]quinoxalin-5-one](http://zinc12.docking.org/img/rings/197587.gif)
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![3-[4-(4-pyridyl)butyl]-2,4,4a,6-tetrahydro-1H-pyrazino[1,2-a]quinoxalin-5-one](http://zinc12.docking.org/img/rings/197580.gif)
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![3-[5-(2-pyridyl)pentyl]-2,4,4a,6-tetrahydro-1H-pyrazino[1,2-a]quinoxalin-5-one](http://zinc12.docking.org/img/rings/197586.gif)
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![3-[5-(4-pyridyl)pentyl]-2,4,4a,6-tetrahydro-1H-pyrazino[1,2-a]quinoxalin-5-one](http://zinc12.docking.org/img/rings/197581.gif)
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