Synonyms: 6,7-Isoquinolinediol,1-(3,4-dihydroxybenzyl)-1,2,3,4-tetrahydro-, hydrochloride (8CI);6,7-Isoquinolinediol, 1-[(3,4-dihydroxyphenyl)methyl]-1,2,3,4-tetrahydro-,hydrochloride (9CI); Norlaudanosoline, hydrochloride (7CI);1,2,3,4-Tetrahydropapaveroline hydrochloride; DL-Tetrahydropapaverolinehydrochloride; Tetrahydropapaveroline hydrochloride