2-(2-Diisopropylaminoethoxy)-3-phenyl-4H-pyrazino(1,2-a)pyrimidin-4-one hydrobromide 21271-23-8 4H-Pyrazino(1,2-a)pyrimidin-4-one, 2-(2-diisopropylaminoethoxy)-3-phenyl-, hydrobromide