1-Phenyl-6,7-dimethoxy-1,2,3,4-tetrahydroisoquinoline 4118-36-9 6,7-Dimethoxy-4-phenyl-1,2,3,4-tetrahydroisoquinoline Isoquinoline, 1,2,3,4-tetrahydro-6,7-dimethoxy-1-phenyl- S-23