8-cyclopentyl-2-(4-(4-methylpiperazin-1-yl)phenylamino)-7-oxo-7,8-dihydropyrido(2,3-d)pyrimidine-6-carbonitrile
8-cyclopentyl-2-(4-(4-methylpiperazin-1-yl)phenylamino)-7-oxo-7,8-dihydropyrido(2,3-d)pyrimidine-6-carbonitrile