1H-Cyclopent(f)isoquinoline, 2,3,4,7,8,9-hexahydro-5,6-dimethoxy-3-(2-methylbutyl)-, hydrobromide 57612-12-1 7,8-Dimethoxy-N-(2-methylbutyl)-1,2,3,4-tetrahydro-cyclopentano(f)isoquinoline hydrobromide