1-(3,4-dimethoxybenzyl)-6,7-dimethoxyisoquinoline 61-25-6 InChI=1/C20H21NO4/c1-22-17-6-5-13(10-18(17)23-2)9-16-15-12-20(25-4)19(24-3)11-14(15)7-8-21-16/h5-8,10-12H,9H2,1-4H isoquinoline, 1-[(3,4-dimethoxyphenyl)methyl]-6,7-dimethoxy-