1,2,3,4-Tetrahydro-6,7-isoquinolinediol 34827-33-3 40704-74-3 42887-47-8 5-21-04-00477 (Beilstein Handbook Reference) 6,7-Dihydroxytetrahydroisoquinoline 6,7-ISOQUINOLINEDIOL, 1,2,3,4-TETRAHYDRO- 6,7-Isoquinolinediol, tetrahydro- BRN 0139174 Norsalsolinol