Synonyms: Isoquinoline,1-[(3,4-dimethoxyphenyl)methyl]-3,4-dihydro-6,7-dimethoxy-, hydrochloride(9CI); Isoquinoline, 3,4-dihydro-6,7-dimethoxy-1-veratryl-, hydrochloride(7CI,8CI); 1-(3,4-Dimethoxybenzyl)-6,7-dimethoxy-3,4-dihydroisoquinolinehydrochloride; 3,4-Dihydropapaverine hydrochloride; Dihydropapaverine hydrochloride