1-((3,4-Dihydroxyphenyl)methyl)-1,2,3,4-tetrahydroisoquinoline-6,7-diol hydrochloride 1-Benzyl-3',4',6,7-tetrahydroxy-1,2,3,4-tetrahydroisoquinoline, hydrochloride 3184-36-9 6,7-ISOQUINOLINEDIOL, 1-(3,4-DIHYDROXYBENZYL)-1,2,3,4-TETRAHYDRO-, HYDROCHLORIDE EINECS 221-680-7 THP hydrochloride Tetrahydropapaveroline, hydrochloride