10-Methoxy-2,3,5,6-tetrahydroimidazolo(2',1':3,4)pyrazino(1,2-a)indole hydrochloride 127556-85-8 2,3,5,6-Tetrahydro-10-methoxyimidazo(2',1':3,4)pyrazino(1,2-a)indole monohydrochloride Imidazo(2',1':3,4)pyrazino(1,2-a)indole, 2,3,5,6-tetrahydro-10-methoxy-, monohydrochloride