2,6-Dimethyl-3-n-propyl-4-oxo-4H-pyrido(1,2-a)pyrimidine hydrochloride 2,6-Dimethyl-3-propyl-4H-pyrido(1,2-a)pyrimidin-4-one monohydrochloride 4H-Pyrido(1,2-a)pyrimidin-4-one, 2,6-dimethyl-3-propyl-, monohydrochloride 70429-39-9