N methyl 1 2 3 4 tetrahydroisoquinoline July 8, 2019 16 32 64 128 2-methyl-1 2 3 4-tetrahydroisoquinoline-4 6-diol 1-methyl-1 2 3 4-tetrahydroquinoline 6-methyl-1 2 3 4-tetrahydroquinoline
