1-tert-butyl-3-[2-{[4-(diethylamino)butyl]amino}-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl]urea
1-tert-butyl-3-[2-{[4-(diethylamino)butyl]amino}-6-(3,5-dimethoxyphenyl)pyrido[2,3-d]pyrimidin-7-yl]urea