1,10-Trimethylene-pyrazino(1,2-a)indole hydrochloride 15932-32-8 4H-Pyrazino(3,2,1-jk)carbazole, 5,6-dihydro-, monohydrochloride 5,6-Dihydro-4H-pyrazino(3,2,1-jk)carbazole hydrochloride