1,2,3,4-Tetrahydro-6,7-dimethoxy-2-methylisoquinoline 16620-96-5 5-21-04-00479 (Beilstein Handbook Reference) BRN 0011592 ISOQUINOLINE, 1,2,3,4-TETRAHYDRO-6,7-DIMETHOXY-2-METHYL- N-Methylheliamine O-Methylcorypalline