1,10-Trimethylene-2-ethyl-8-methyl-1,2,3,4-tetrahydropyrazino(1,2-a)indole hydrochloride 1H-Pyrazino(3,2,1-jk)carbazole, 2,3,3a,4,5,6-hexahydro-3-ethyl-8-methyl-, hydrochloride 28735-06-0