1 2 3 4 tetrahydroisoquinoline structure July 8, 2019 16 32 64 128 1 2 3 4-tetrahydroisoquinoline 1 2 3 4-tetrahydroquinoline 1 2 3 4-tetrahydroquinoxaline 1 2 3 4-tetrahydroisoquinoline pka
