2-Methyl-3-n-propyl-4-oxo-4H-pyrido(1,2-a)pyrimidine hydrochloride 2-Methyl-3-propyl-4H-pyrido(1,2-a)pyrimidin-4-one monohydrochloride 4H-Pyrido(1,2-a)pyrimidin-4-one, 2-methyl-3-propyl-, monohydrochloride 70381-34-9