1-(3',4'-Dihydroxybenzyl)-1,2,3,4-tetrahydroisoquinoline hydrochloride 4-(1,2,3,4-Tetrahydroisoquinolin-1-ylmethyl)pyrocatechol hydrochloride 57464-66-1 Pyrocatechol, 4-(1,2,3,4-tetrahydroisoquinolin-1-ylmethyl)-, hydrochloride