1 JIN 6-(2,6-dichlorophenyl)-2-[(4-fluoro-3-methylphenyl)amino]-8-methylpyrido[2,3-D]pyrimidin-7(8h)-one 1.000 2 P16 6-(2,6-dichlorophenyl)-2-{[3-(hydroxymethyl)phenyl]amino}-8-methylpyrido[2,3-D]pyrimidin-7(8h)-one 0.933 3 P17 6-(2,6-dichloro-phenyl)-8-methyl-2-(3-methylsulfanyl-phenylamino)-8h-pyrido[2,3-D]pyrimidin-7-one 0.871 4 96M 6-(2,6-dichlorophenyl)-2-({4-[2-(diethylamino)ethoxy]phenyl}amino)-8-methylpyrido[2,3-D]pyrimidin-7(8h)-one 0.730