5 6 7 8-tetrahydroisoquinoline July 8, 2019 16 32 64 128 5 6 7 8-tetrahydronaphthalene-1-carboxylic acid (6r)-5 6 7 8-tetrahydrobiopterin dihydrochloride 5 6 7 8-tetrahydroquinoline 5-formyl-5 6 7 8-tetrahydropteroic acid
