![2-phenyl-3,4-dihydropyrazino[1,2-a]indol-1-one](http://zinc12.docking.org/img/rings/83863.gif)
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![8-(4-piperidyloxy)-3,4-dihydro-2H-pyrazino[1,2-a]indol-1-one](http://zinc12.docking.org/img/rings/366498.gif)
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![2-[2-(2-thienyl)ethyl]-3,4-dihydropyrazino[1,2-a]indol-1-one](http://zinc12.docking.org/img/rings/83878.gif)
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![2-benzyl-3,4-dihydropyrazino[1,2-a]indol-1-one](http://zinc12.docking.org/img/rings/83883.gif)
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![2-phenethyl-3,4-dihydropyrazino[1,2-a]indol-1-one](http://zinc12.docking.org/img/rings/83862.gif)
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![8-(3-pyrrolidinopropoxy)-3,4-dihydro-2H-pyrazino[1,2-a]indol-1-one](http://zinc12.docking.org/img/rings/369197.gif)
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![N-cyclohexyl-1-keto-3,4-dihydro-2H-pyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/83742.gif)
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![8-(3-piperidinopropoxy)-3,4-dihydro-2H-pyrazino[1,2-a]indol-1-one](http://zinc12.docking.org/img/rings/369839.gif)
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![N-cycloheptyl-1-keto-3,4-dihydro-2H-pyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/83787.gif)
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![N-[2-(2-furfurylamino)-2-keto-ethyl]-1-keto-3,4-dihydro-2H-pyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/92585.gif)
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![1-keto-N-[2-keto-2-(3-pyridylmethylamino)ethyl]-3,4-dihydro-2H-pyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/92579.gif)
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![N-[2-(benzylamino)-2-keto-ethyl]-1-keto-3,4-dihydro-2H-pyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/92589.gif)
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![2-(cyclopropylmethyl)-8-(4-piperidyloxy)-3,4-dihydropyrazino[1,2-a]indol-1-one](http://zinc12.docking.org/img/rings/366496.gif)
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![8-[[1-(cyclopropylmethyl)-4-piperidyl]oxy]-3,4-dihydro-2H-pyrazino[1,2-a]indol-1-one](http://zinc12.docking.org/img/rings/369194.gif)
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![8-(4-piperidyloxy)-2-(2-pyridylmethyl)-3,4-dihydropyrazino[1,2-a]indol-1-one](http://zinc12.docking.org/img/rings/366721.gif)
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![8-(4-piperidyloxy)-2-(3-pyridylmethyl)-3,4-dihydropyrazino[1,2-a]indol-1-one](http://zinc12.docking.org/img/rings/369662.gif)
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![8-(4-piperidyloxy)-2-(4-pyridylmethyl)-3,4-dihydropyrazino[1,2-a]indol-1-one](http://zinc12.docking.org/img/rings/369665.gif)
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![2-benzyl-8-(4-piperidyloxy)-3,4-dihydropyrazino[1,2-a]indol-1-one](http://zinc12.docking.org/img/rings/366483.gif)
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![N-cyclopentyl-1-keto-2-phenyl-3,4-dihydropyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/83763.gif)
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![2-cycloheptyl-N-cyclopentyl-1-keto-3,4-dihydropyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/83771.gif)
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![2-benzyl-N-cyclohexyl-1-keto-3,4-dihydropyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/83728.gif)
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![2-cycloheptyl-N-cyclohexyl-1-keto-3,4-dihydropyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/83740.gif)
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![N-cycloheptyl-1-keto-2-phenyl-3,4-dihydropyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/83795.gif)
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![N-cyclopentyl-1-keto-2-phenethyl-3,4-dihydropyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/83770.gif)
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![N-cyclohexyl-1-keto-2-(3-pyrrolidinopropyl)-3,4-dihydropyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/83744.gif)
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![2-benzyl-N-cycloheptyl-1-keto-3,4-dihydropyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/83782.gif)
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![N,2-dibenzyl-1-keto-3,4-dihydropyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/83856.gif)
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![N-cyclohexyl-1-keto-2-(3-piperazinopropyl)-3,4-dihydropyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/83760.gif)
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![N-benzyl-1-keto-2-phenethyl-3,4-dihydropyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/83853.gif)
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![N-cyclohexyl-1-keto-2-(3-phenylpropyl)-3,4-dihydropyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/83746.gif)
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![N-cycloheptyl-1-keto-2-piperonyl-3,4-dihydropyrazino[1,2-a]indole-3-carboxamide](http://zinc12.docking.org/img/rings/83819.gif)
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