6-Bromo-8-ethyl-2-[[4-(4-methylpiperazin-1-yl)phenyl]amino]-8H-pyrido[2,3-d]pyrimidin-7-one

6-Bromo-8-ethyl-2-[[4-(4-methylpiperazin-1-yl)phenyl]amino]-8H-pyrido[2,3-d]pyrimidin-7-one