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![2-[(2-ketotetrahydrofuran-3-yl)thio]-3H-thieno[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/247036.gif)
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![2-[2-(triazol-2-yl)ethyl]-3H-thieno[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/291923.gif)
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![3-(1,1-diketothiolan-3-yl)thieno[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/570886.gif)
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![5-[(4-ketothieno[2,3-d]pyrimidin-3-yl)methyl]oxazolidin-2-one](http://zinc12.docking.org/img/rings/527116.gif)
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![6-(thiazolidine-3-carbonyl)-3H-thieno[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/316684.gif)
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![2-(3-thenylthio)-3H-thieno[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/614468.gif)
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![2-(4-pyrimidylmethyl)-3H-thieno[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/510478.gif)
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![2-(piperazinomethyl)-3H-thieno[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/67640.gif)
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![3-(2-furfurylideneamino)thieno[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/222244.gif)
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![6-(pyrrolidine-1-carbonyl)-3H-thieno[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/127780.gif)
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![N-(cyclopropylmethyl)-4-keto-3H-thieno[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/546308.gif)
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![2-(3-pyridylmethyl)-3H-thieno[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/510608.gif)
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![2-(phenylthio)-3H-thieno[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/79446.gif)
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