A member of the class of ureas that is 1-tert-butylurea in which one of the hydrogens attached to N(3) is substituted by a pyrido[2,3-d]pyrimidin-7-yl group, which is itself substituted at positions 2 and 6 by a 4-(diethylamino)butyl]amino group and a 3,5-dimethoxyphenyl group, respectively. It is a FGF/VEGF receptor tyrosine kinase inhibitor.