![1-cyclopropylpyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/186650.gif)
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![7-cyclopropyl-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/12022.gif)
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![7-(1,2,4-oxadiazol-5-yl)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/412212.gif)
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![5-pyrrolidino-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/95461.gif)
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![3-(1,2,4-oxadiazol-5-ylmethyl)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/597872.gif)
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![5-morpholino-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/95480.gif)
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![N-cyclopropyl-2,4-diketo-1H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/513159.gif)
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![N-cyclopropyl-2,4-diketo-1H-pyrido[2,3-d]pyrimidine-7-carboxamide](http://zinc12.docking.org/img/rings/513160.gif)
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![1-(2-furfuryl)pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/574717.gif)
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![5-(cyclopentylamino)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/125618.gif)
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![5-piperidino-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/95464.gif)
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![5-phenyl-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/248697.gif)
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![7-phenyl-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/145638.gif)
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![1-cyclopropyl-3-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)urea](http://zinc12.docking.org/img/rings/212936.gif)
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![6-(thiazolidine-3-carbonyl)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/313857.gif)
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![2,4-diketo-1H-pyrido[2,3-d]pyrimidine-7-carboxylic Acid Cyclopropylmethyl Ester](http://zinc12.docking.org/img/rings/337359.gif)
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![5-(2-furfurylamino)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/95544.gif)
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![5-(2-pyridylamino)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/95597.gif)
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![5-(2-thenylamino)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/95547.gif)
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![5-(4-piperidylamino)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/125638.gif)
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![5-(4-pyridylamino)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/95711.gif)
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![5-(tetrahydrofurfurylamino)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/125620.gif)
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![N-(cyclopropylmethyl)-2,4-diketo-1H-pyrido[2,3-d]pyrimidine-5-carboxamide](http://zinc12.docking.org/img/rings/436129.gif)
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![N-(cyclopropylmethyl)-2,4-diketo-1H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/17474.gif)
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![3-(2-pyridylmethyl)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/469703.gif)
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![5-(azepan-1-yl)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/95458.gif)
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![5-anilino-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/95559.gif)
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![1-benzylpyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/574943.gif)
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![3-benzyl-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/391744.gif)
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![2,4-diketo-N-(1,3,4-thiadiazol-2-yl)-1H-pyrido[2,3-d]pyrimidine-7-carboxamide](http://zinc12.docking.org/img/rings/562640.gif)
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![2,4-diketo-N-(1H-pyrazol-3-yl)-1H-pyrido[2,3-d]pyrimidine-7-carboxamide](http://zinc12.docking.org/img/rings/507715.gif)
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![2,4-diketo-N-(1H-pyrazol-4-yl)-1H-pyrido[2,3-d]pyrimidine-5-carboxamide](http://zinc12.docking.org/img/rings/323856.gif)
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![2,4-diketo-N-(1H-pyrazol-4-yl)-1H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/323865.gif)
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![2,4-diketo-N-(1H-pyrazol-5-yl)-1H-pyrido[2,3-d]pyrimidine-7-carboxamide](http://zinc12.docking.org/img/rings/365096.gif)
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![2,4-diketo-N-thiazol-2-yl-1H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/593562.gif)
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![5-(1,3-dioxolan-2-ylmethoxyamino)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/7806.gif)
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![N-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)thiazole-5-carboxamide](http://zinc12.docking.org/img/rings/607651.gif)
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![N-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-5-yl)-2-furamide](http://zinc12.docking.org/img/rings/111383.gif)
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![N-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-5-yl)thiophene-2-carboxamide](http://zinc12.docking.org/img/rings/111386.gif)
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![N-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)pyrrolidine-1-carboxamide](http://zinc12.docking.org/img/rings/212971.gif)
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![N-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)thiophene-2-carboxamide](http://zinc12.docking.org/img/rings/306636.gif)
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![2,4-diketo-1H-pyrido[2,3-d]pyrimidine-6-carboxylic Acid Cyclopentyl Ester](http://zinc12.docking.org/img/rings/384088.gif)
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![2,4-diketo-1H-pyrido[2,3-d]pyrimidine-7-carboxylic Acid Cyclopentyl Ester](http://zinc12.docking.org/img/rings/386270.gif)
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![3-(2-morpholinoethyl)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/107662.gif)
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![3-cyclopropyl-N-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)propionamide](http://zinc12.docking.org/img/rings/614996.gif)
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![5-(2-pyridylmethylamino)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/95539.gif)
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![5-(3-pyridylmethylamino)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/95536.gif)
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![5-(4-pyridylmethylamino)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/95602.gif)
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![5-(piperidine-1-carbonyl)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/89617.gif)
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![6-(piperidine-1-carbonyl)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/89661.gif)
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