125055-78-9 4H-Pyrido(1,2-a)pyrimidine-3-carboxamide, N-cyclopentyl-6-methyl-4-oxo-, monohydrochloride N-Cyclopentyl-6-methyl-4-oxo-4H-pyrido(1,2-a)pyrimidine-3-carboxamide monohydrochloride