17481-62-8 2-Chloro-4-oxo-4H-pyrido(1,2-a)pyrimidine-3-carboxaldehyde 4H-Pyrido(1,2-a)pyrimidine-3-carboxaldehyde, 2-chloro-4-oxo- 5-24-08-00133 (Beilstein Handbook Reference) BRN 0881296 NSC 106678