6-(2,6-dichlorophenyl)-8-(1-hydroxyethyl)-2-{[4-(4-methylpiperazin-1-yl)phenyl]amino}pyrido[4,3-d]pyrimidin-5(6H)-one

6-(2,6-dichlorophenyl)-2-(methylthio)-5-oxo-5,6-dihydropyrido[4,3-d]pyrimidine-8-carbaldehyde

6-(2,6-dichlorophenyl)-2-(methylthio)-8-((phenylamino)methyl)pyrido[4,3-d]pyrimidin-5(6H)-one

6-(2,6-dichlorophenyl)-2-{[4-(4-methylpiperazin-1-yl)phenyl]amino}-8-{[(2,2,2-trifluoroethyl)amino]methyl}pyrido[4,3-d]pyrimidin-5(6H)-one

6-(2,6-dichlorophenyl)-2-(methylthio)-8-((2,2,2-trifluoroethylamino)methyl)pyrido[4,3-d]pyrimidin-5(6H)-one