N phenyl 1 2 3 4 tetrahydroisoquinoline July 8, 2019 16 32 64 128 2-phenyl-1 2 3 4-tetrahydroisoquinoline 1-phenyl-1 2 3 4-tetrahydroisoquinoline 2 3 4 5-tetrahydro-1 1'-biphenyl 1 2 3 4-tetrahydroquinoline