![6,6-diketo-1-phenyl-3,4,4a,5,7,7a-hexahydrothieno[3,4-b]pyrazin-2-one](http://zinc12.docking.org/img/rings/64808.gif)
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![4-cyclopentyl-6,6-diketo-1-phenyl-4a,5,7,7a-tetrahydro-3H-thieno[3,4-b]pyrazin-2-one](http://zinc12.docking.org/img/rings/64817.gif)
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![4-(2-furfuryl)-6,6-diketo-1-phenyl-4a,5,7,7a-tetrahydro-3H-thieno[3,4-b]pyrazin-2-one](http://zinc12.docking.org/img/rings/64830.gif)
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![4-cyclohexyl-6,6-diketo-1-phenyl-4a,5,7,7a-tetrahydro-3H-thieno[3,4-b]pyrazin-2-one](http://zinc12.docking.org/img/rings/64771.gif)
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![6,6-diketo-1-phenyl-4-(3-pyridylmethyl)-4a,5,7,7a-tetrahydro-3H-thieno[3,4-b]pyrazin-2-one](http://zinc12.docking.org/img/rings/173133.gif)
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![6,6-diketo-1-phenyl-4-[2-(2-thienyl)ethyl]-4a,5,7,7a-tetrahydro-3H-thieno[3,4-b]pyrazin-2-one](http://zinc12.docking.org/img/rings/64849.gif)
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![4-benzyl-6,6-diketo-1-phenyl-4a,5,7,7a-tetrahydro-3H-thieno[3,4-b]pyrazin-2-one](http://zinc12.docking.org/img/rings/64792.gif)
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![4-cycloheptyl-6,6-diketo-1-phenyl-4a,5,7,7a-tetrahydro-3H-thieno[3,4-b]pyrazin-2-one](http://zinc12.docking.org/img/rings/64807.gif)
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![4-(2-cyclohexen-1-ylethyl)-6,6-diketo-1-phenyl-4a,5,7,7a-tetrahydro-3H-thieno[3,4-b]pyrazin-2-one](http://zinc12.docking.org/img/rings/64826.gif)
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![6,6-diketo-4-phenethyl-1-phenyl-4a,5,7,7a-tetrahydro-3H-thieno[3,4-b]pyrazin-2-one](http://zinc12.docking.org/img/rings/64775.gif)
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![6,6-diketo-4-(2-phenoxyethyl)-1-phenyl-4a,5,7,7a-tetrahydro-3H-thieno[3,4-b]pyrazin-2-one](http://zinc12.docking.org/img/rings/64804.gif)
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![6,6-diketo-1-phenyl-4-(3-phenylpropyl)-4a,5,7,7a-tetrahydro-3H-thieno[3,4-b]pyrazin-2-one](http://zinc12.docking.org/img/rings/64797.gif)
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![6,6-diketo-1-phenyl-4-piperonyl-4a,5,7,7a-tetrahydro-3H-thieno[3,4-b]pyrazin-2-one](http://zinc12.docking.org/img/rings/64847.gif)
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