![N-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-5-yl)-4-keto-chromene-2-carboxamide](http://zinc12.docking.org/img/rings/111393.gif)
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![N-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)-2-keto-3,4-dihydro-1H-quinoline-4-carboxamide](http://zinc12.docking.org/img/rings/187793.gif)
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![1-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)-3-(indan-5-ylmethyl)urea](http://zinc12.docking.org/img/rings/212812.gif)
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![5-[[2-(3,4-dihydro-2H-quinolin-1-yl)-2-keto-ethyl]thio]-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/143615.gif)
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![N-(2-isoindolin-2-ylethyl)-2,4-diketo-1H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/586613.gif)
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![2,4-diketo-N-(1-naphthylmethyl)-1H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/123147.gif)
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![2,4-diketo-N-(2-naphthylmethyl)-1H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/124161.gif)
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![2,4-diketo-N-(tetralin-1-ylmethyl)-1H-pyrido[2,3-d]pyrimidine-7-carboxamide](http://zinc12.docking.org/img/rings/414922.gif)
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![N-(2,4-diketo-1,3-diazaspiro[4.5]decan-3-yl)-2,4-diketo-1H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/123848.gif)
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![1-(2,3-dihydro-1,4-benzodioxin-3-ylmethyl)-3-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)urea](http://zinc12.docking.org/img/rings/212908.gif)
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![1-(2,3-dihydro-1,4-benzodioxin-6-ylmethyl)-3-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)urea](http://zinc12.docking.org/img/rings/212866.gif)
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![1-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)-3-(2-imidazo[1,2-a]pyridin-2-ylethyl)urea](http://zinc12.docking.org/img/rings/212939.gif)
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![1-[2-(1H-benzimidazol-2-yl)ethyl]-3-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)urea](http://zinc12.docking.org/img/rings/212915.gif)
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![2,4-diketo-N'-(4,5,6,7-tetrahydrobenzothiophene-2-carbonyl)-1H-pyrido[2,3-d]pyrimidine-6-carbohydrazide](http://zinc12.docking.org/img/rings/124009.gif)
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![2,4-diketo-N-(3-pyrazolo[1,5-a]pyrimidin-2-ylpropyl)-1H-pyrido[2,3-d]pyrimidine-7-carboxamide](http://zinc12.docking.org/img/rings/504104.gif)
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![N'-(benzofuran-2-carbonyl)-2,4-diketo-1H-pyrido[2,3-d]pyrimidine-6-carbohydrazide](http://zinc12.docking.org/img/rings/124062.gif)
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![1-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)-3-(8-quinolylmethyl)urea](http://zinc12.docking.org/img/rings/162561.gif)
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![1-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)-3-[2-(1H-indol-3-yl)ethyl]urea](http://zinc12.docking.org/img/rings/212896.gif)
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![1-(chroman-3-ylmethyl)-3-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)urea](http://zinc12.docking.org/img/rings/212945.gif)
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![2,4-diketo-N-[(2-keto-3,4-dihydro-1H-quinolin-6-yl)methyl]-1H-pyrido[2,3-d]pyrimidine-7-carboxamide](http://zinc12.docking.org/img/rings/442406.gif)
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![N-[2-(2,3-dihydro-1,4-benzodioxin-6-yl)ethyl]-2,4-diketo-1H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/124081.gif)
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![N-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)-2-(2-naphthoxy)acetamide](http://zinc12.docking.org/img/rings/371268.gif)
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![N-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)-3-(1-naphthyl)acrylamide](http://zinc12.docking.org/img/rings/186877.gif)
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![N'-[2-(1H-indol-3-yl)acetyl]-2,4-diketo-1H-pyrido[2,3-d]pyrimidine-6-carbohydrazide](http://zinc12.docking.org/img/rings/124017.gif)
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![N'-(4,5,6,7,8,9-hexahydrocycloocta[b]thiophene-2-carbonyl)-2,4-diketo-1H-pyrido[2,3-d]pyrimidine-6-carbohydrazide](http://zinc12.docking.org/img/rings/123963.gif)
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![1-cyclopropyl-7-phenyl-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/185954.gif)
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![1-cyclopropyl-N-(cyclopropylmethyl)-2,4-diketo-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/436210.gif)
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![7-cyclopropyl-N-(cyclopropylmethyl)-2,4-diketo-1H-pyrido[2,3-d]pyrimidine-5-carboxamide](http://zinc12.docking.org/img/rings/436409.gif)
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![N-(dicyclopropylmethyl)-2,4-diketo-1H-pyrido[2,3-d]pyrimidine-7-carboxamide](http://zinc12.docking.org/img/rings/371909.gif)
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![N-cyclobutyl-7-cyclopropyl-2,4-diketo-1H-pyrido[2,3-d]pyrimidine-5-carboxamide](http://zinc12.docking.org/img/rings/286438.gif)
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![1-cyclopropyl-2,4-diketo-N-(1H-pyrazol-4-yl)pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/323864.gif)
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![1-cyclopropyl-2,4-diketo-N-thiazol-2-yl-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/593566.gif)
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![7-cyclopropyl-2,4-diketo-N-(1H-pyrazol-3-yl)-1H-pyrido[2,3-d]pyrimidine-5-carboxamide](http://zinc12.docking.org/img/rings/462419.gif)
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![7-cyclopropyl-2,4-diketo-N-(1H-pyrazol-4-yl)-1H-pyrido[2,3-d]pyrimidine-5-carboxamide](http://zinc12.docking.org/img/rings/323855.gif)
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![N-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)-2-(1H-pyrazol-4-yl)cyclopropanecarboxamide](http://zinc12.docking.org/img/rings/295560.gif)
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![1-(dicyclopropylmethyl)-3-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)urea](http://zinc12.docking.org/img/rings/213005.gif)
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![3-cyclopropyl-N-(2,4-diketo-1H-pyrido[2,3-d]pyrimidin-6-yl)thiophene-2-carboxamide](http://zinc12.docking.org/img/rings/495238.gif)
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![7-cyclopropyl-5-(morpholine-4-carbonyl)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/349860.gif)
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![7-cyclopropyl-5-(piperazine-1-carbonyl)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/181436.gif)
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![1-cyclopropyl-6-(piperidine-1-carbonyl)pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/89656.gif)
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![7-cyclopropyl-2,4-diketo-1H-pyrido[2,3-d]pyrimidine-5-carboxylic Acid Cyclopentyl Ester](http://zinc12.docking.org/img/rings/383712.gif)
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![7-cyclopropyl-5-(piperidine-1-carbonyl)-1H-pyrido[2,3-d]pyrimidine-2,4-quinone](http://zinc12.docking.org/img/rings/89611.gif)
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![N-(cyclobutylmethyl)-7-cyclopropyl-2,4-diketo-1H-pyrido[2,3-d]pyrimidine-5-carboxamide](http://zinc12.docking.org/img/rings/149054.gif)
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![N-cyclopentyl-1-cyclopropyl-2,4-diketo-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/205991.gif)
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![1-cyclopropyl-2,4-diketo-N-(1H-pyrazol-4-ylmethyl)pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/346630.gif)
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![1-cyclopropyl-2,4-diketo-N-(thiazol-2-ylmethyl)pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/596102.gif)
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![7-cyclopropyl-2,4-diketo-N-(thiazol-2-ylmethyl)-1H-pyrido[2,3-d]pyrimidine-5-carboxamide](http://zinc12.docking.org/img/rings/596059.gif)
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![7-cyclopropyl-2,4-diketo-N-(thiazol-4-ylmethyl)-1H-pyrido[2,3-d]pyrimidine-5-carboxamide](http://zinc12.docking.org/img/rings/117648.gif)
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![7-cyclopropyl-2,4-diketo-N-(thiazol-5-ylmethyl)-1H-pyrido[2,3-d]pyrimidine-5-carboxamide](http://zinc12.docking.org/img/rings/286979.gif)
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