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

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

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

6-(2,6-dichlorophenyl)-8-(hydroxymethyl)-2-[(2'-methyl-2',3'-dihydro-1'H-spiro[cyclopropane-1,4'-isoquinolin]-7'-yl)amino]pyrido[4,3-d]pyrimidin-5(6H)-one

tert-butyl 6-(6-(2,6-dichlorophenyl)-8-(1H-imidazol-2-yl)-5-oxo-5,6-dihydropyrido[4,3-d]pyrimidin-2-ylamino)-3,4-dihydroisoquinoline-2(1H)-carboxylate