21271-24-9 3-Phenyl-2-(2-(1-pyrrolidinyl)ethoxy)-4H-pyrazino(1,2-a)pyrimidin-4-one monohydrobromide 4H-Pyrazino(1,2-a)pyrimidin-4-one, 3-phenyl-2-(2-(1-pyrrolidinyl)ethoxy)-, monohydrobromide