Synonyms: 2,9-Dimethyl-3-ethyl-4-oxo-4H-pyrido(1,2-a)pyrimidine hydrochloride;2,9-Dimethyl-3-ethyl-4H-pyrido(1,2-a)pyrimidin-4-one monohydrochloride;4H-Pyrido(1,2-a)pyrimidin-4-one, 2,9-dimethyl-3-ethyl-, monohydrochloride;AC1MI32M;CHEMBL554870;LS-134177;3-ethyl-2,9-dimethylpyrido[1,2-a]pyrimidin-4-one hydrochloride;80310-21-0