The chemical PD-166866 has a designated molecular formula of C20H24N6O3 and a molecular weight of 396.451 g/mol. Synonyms may include: UNII-NA856793UT, 1-(2-Amino-6-(3,5-dimethoxyphenyl)-pyrido(2,3-d)pyrimidin-7-yl)-3-tert-butyl urea, Urea, N-(2-amino-6-(3,5-dimethoxyphenyl)pyrido(2,3-d)pyrimidin-7-yl)-N'-(1,1-dimethylethyl)- (ChemID). PD-166866 has been assigned a MeSH pharmacological action of: Protein Kinase Inhibitor.