120021-27-4 3-(2-Vinyl-4,5-dimethoxyphenyl)-2-methyl-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline Isoquinoline, 1,2,3,4-tetrahydro-6,7-dimethoxy-3-(2-ethenyl-4,5-dimethoxyphenyl)-2-methyl-, hydrochloride, (+-)-