![6-[(cyclopentylamino)methyl]-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/25098.gif)
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![6-(2-thiazol-2-ylethylamino)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/247754.gif)
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![6-(2-thiazol-4-ylethylamino)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/248518.gif)
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![6-(4-pyrimidylmethylamino)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/246874.gif)
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![6-(5-keto-1,4-diazepan-1-yl)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/168698.gif)
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![6-[(thiazol-5-ylmethylamino)methyl]-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/25436.gif)
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![6-[2-(1H-imidazol-2-yl)ethylamino]-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/248562.gif)
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![6-[2-(1H-pyrazol-4-yl)ethylamino]-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/168806.gif)
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![2-(4-keto-1H-pyrazolo[3,4-d]pyrimidin-5-yl)acetic Acid Cyclopropylmethyl Ester](http://zinc12.docking.org/img/rings/277462.gif)
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![5-[2-keto-2-(1H-pyrrol-2-yl)ethyl]-1H-pyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/238178.gif)
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![5-[2-keto-2-(1H-pyrrol-3-yl)ethyl]-1H-pyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/238541.gif)
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![5-[2-keto-2-(2-thienyl)ethyl]-1H-pyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/616004.gif)
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![6-(1,4-diazepan-1-ylmethyl)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/25034.gif)
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![6-(1,4-oxazepan-4-ylmethyl)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/431497.gif)
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![6-(2-pyridylmethylamino)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/168470.gif)
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![6-(3-pyridylmethylamino)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/168761.gif)
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![6-(4-piperidylmethylamino)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/247845.gif)
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![6-(4-pyridylmethylamino)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/168729.gif)
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![6-[(2-furfurylamino)methyl]-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/25092.gif)
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![6-[(2-thenylamino)methyl]-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/24978.gif)
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![6-[(3-furfurylamino)methyl]-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/389418.gif)
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![6-[2-(2-furyl)ethylamino]-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/168629.gif)
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![6-[2-(2-thienyl)ethylamino]-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/168617.gif)
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![6-[2-(3-thienyl)ethylamino]-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/246167.gif)
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![6-[2-(tetrahydrofuryl)ethylamino]-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/168731.gif)
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![N-(cyclopropylmethyl)-2-(4-keto-1H-pyrazolo[3,4-d]pyrimidin-5-yl)acetamide](http://zinc12.docking.org/img/rings/546303.gif)
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![5-[2-(2-piperidyl)ethyl]-1H-pyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/561639.gif)
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![5-[2-(cyclopentylamino)ethyl]-1H-pyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/75063.gif)
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![5-[4-(cyclopropylamino)butyl]-1H-pyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/74947.gif)
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![6-(2-cyclopentylethylamino)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/168758.gif)
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![6-(anilinomethyl)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/25183.gif)
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![6-(benzylamino)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/168466.gif)
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![6-(cyclohex-3-en-1-ylmethylamino)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/247302.gif)
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![6-(cyclohexylmethylamino)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/168482.gif)
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![5-phenethyl-1H-pyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/150066.gif)
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![2-(4-keto-1H-pyrazolo[3,4-d]pyrimidin-5-yl)-N-(1H-pyrazol-5-yl)acetamide](http://zinc12.docking.org/img/rings/246933.gif)
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![6-[(4-keto-1H-pyrazolo[3,4-d]pyrimidin-5-yl)methyl]uracil](http://zinc12.docking.org/img/rings/41412.gif)
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![6-[3-(1,2,4-triazol-1-yl)propylamino]-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/168833.gif)
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![2-(4-keto-1H-pyrazolo[3,4-d]pyrimidin-5-yl)-N-(2-thienyl)acetamide](http://zinc12.docking.org/img/rings/200300.gif)
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![2-(4-keto-1H-pyrazolo[3,4-d]pyrimidin-5-yl)acetic Acid Oxetan-3-ylmethyl Ester](http://zinc12.docking.org/img/rings/277693.gif)
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![5-(2-keto-2-piperazino-ethyl)-1H-pyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/478812.gif)
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![6-(2-morpholinoethylamino)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/168495.gif)
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![6-(2-piperazinoethylamino)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/246221.gif)
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![6-(3-pyrazol-1-ylpropylamino)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/246533.gif)
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![6-(3-thiazol-2-ylpropylamino)-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/248529.gif)
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![6-[2-(2-ketopyrrolidino)ethylamino]-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/246854.gif)
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![6-[3-(1H-pyrazol-4-yl)propylamino]-1,5-dihydropyrazolo[3,4-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/248556.gif)
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