![4-keto-N-(2-phenoxyethyl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/290207.gif)
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![4-keto-N-(3-piperidinopropyl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/617139.gif)
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![N-(2-anilinoethyl)-4-keto-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/53059.gif)
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![N-benzyl-2-[(4-keto-3H-pyrido[2,3-d]pyrimidin-2-yl)thio]acetamide](http://zinc12.docking.org/img/rings/234231.gif)
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![N-[2-(cyclohexylamino)ethyl]-4-keto-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/247247.gif)
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![4-keto-N-(3-phenylpropyl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/327226.gif)
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![1-[(4-keto-3H-pyrido[2,3-d]pyrimidine-6-carbonyl)amino]-3-phenyl-thiourea](http://zinc12.docking.org/img/rings/471143.gif)
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![4-keto-N'-(2-phenylacetyl)-3H-pyrido[2,3-d]pyrimidine-6-carbohydrazide](http://zinc12.docking.org/img/rings/360179.gif)
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![N-(2-anilino-2-keto-ethyl)-4-keto-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/324367.gif)
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![4-keto-N-(3-phenoxypropyl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/159027.gif)
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![4-keto-N-(4-piperidinobutyl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/356126.gif)
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![2-(4-ketopyrido[2,3-d]pyrimidin-3-yl)-N-(3-phenylpropyl)acetamide](http://zinc12.docking.org/img/rings/182686.gif)
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![N-(3-benzoxypropyl)-4-keto-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/325539.gif)
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![4-keto-N-(5-phenylpentyl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/596371.gif)
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![4-keto-N'-(3-phenoxypropanoyl)-3H-pyrido[2,3-d]pyrimidine-6-carbohydrazide](http://zinc12.docking.org/img/rings/218925.gif)
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![6-(indoline-1-carbonyl)-3H-pyrido[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/48533.gif)
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![3-[(2-ketochromen-4-yl)methyl]pyrido[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/189604.gif)
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![6-(3,4,4a,5,6,7,8,8a-octahydro-2H-quinoline-1-carbonyl)-3H-pyrido[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/66143.gif)
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![6-(3,4-dihydro-2H-quinoline-1-carbonyl)-3H-pyrido[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/346098.gif)
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![3-[3-(1,3-benzodioxol-5-yloxy)propyl]pyrido[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/614732.gif)
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![4-keto-N-(5-quinolyl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/38904.gif)
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![4-keto-N-(8-quinolyl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/337529.gif)
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![6-(1,2,3,5-tetrahydro-1,4-benzodiazepine-4-carbonyl)-3H-pyrido[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/161391.gif)
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![N-(benzofuran-2-ylmethyl)-4-keto-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/429316.gif)
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![3-[3-(3,4-dihydro-1H-isoquinolin-2-yl)propyl]pyrido[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/382984.gif)
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![4-keto-N-(tetralin-1-ylmethyl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/414370.gif)
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![3-[3-(1-naphthoxy)propyl]pyrido[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/190949.gif)
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![N-[2-(4H-1,3-benzodioxin-8-yl)ethyl]-4-keto-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/33221.gif)
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![3-[[5-(2-thienyl)oxazol-2-yl]methyl]pyrido[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/520113.gif)
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![N-[(2-cyclopropylthiazol-4-yl)methyl]-4-keto-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/438287.gif)
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![N-[2-(cyclopropylmethyl)pyrazol-3-yl]-4-keto-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/318428.gif)
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![3-[(5-phenyl-1,2,4-oxadiazol-3-yl)methyl]pyrido[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/176365.gif)
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![N-cyclopropyl-4-keto-N-(3-thenyl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/514428.gif)
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![2-anilino-5-(2-furyl)-3H-pyrido[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/582755.gif)
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![4-keto-N-(1-phenylcyclopropyl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/457777.gif)
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![4-keto-N-(2-phenylcyclopropyl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/87339.gif)
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![N-cyclohexyl-N-cyclopropyl-4-keto-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/285847.gif)
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![2-(1,2,4-oxadiazol-3-ylmethylthio)-3-(tetrahydrofurfuryl)pyrido[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/480838.gif)
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![3-(tetrahydrofurfuryl)-2-(thiazol-4-ylmethylthio)pyrido[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/601533.gif)
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![3-[(3-benzyl-1,2,4-oxadiazol-5-yl)methyl]pyrido[2,3-d]pyrimidin-4-one](http://zinc12.docking.org/img/rings/520111.gif)
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![N-benzyl-N-cyclopropyl-4-keto-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/244522.gif)
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![4-keto-N-[2-(2-pyrimidyl)pyrazol-3-yl]-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/317992.gif)
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![4-keto-N-[3-(tetrazol-1-yl)phenyl]-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/64750.gif)
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![4-keto-N-[[3-(2-thienyl)-1H-1,2,4-triazol-5-yl]methyl]-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/291480.gif)
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![N-[2-(4-cyclopropyl-5-thioxo-1H-1,2,4-triazol-3-yl)ethyl]-4-keto-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/474628.gif)
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![N-[[5-(2-furyl)-1,2,4-oxadiazol-3-yl]methyl]-4-keto-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/338829.gif)
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![4-keto-N-(6-pyrazol-1-yl-3-pyridyl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/39731.gif)
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![4-keto-N-(2-phenylpyrazol-3-yl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/320091.gif)
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![4-keto-N-(2-pyrazol-1-ylphenyl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/66112.gif)
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![4-keto-N-(3-oxazol-2-ylphenyl)-3H-pyrido[2,3-d]pyrimidine-6-carboxamide](http://zinc12.docking.org/img/rings/369145.gif)
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