1H-Cyclopent(f)isoquinoline, 2,3,4,7,8,9-hexahydro-3-(3,4-dimethoxybenzyl)-5,6-dimethoxy-, hydrochloride 57612-21-2 7,8-Dimethoxy-N-(3,4-dimethoxybenzyl)-1,2,3,4-tetrahydro-cyclopentano(f)isoquinoline HCl