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Chemical structures of the prototypical phenethylamine hallucinongen 3,4,5-trimethoxy-phenethylamine (mescaline, A.), the representative tryptamine hallucinogen N,N-dimethyl-4-phosphoryloxytryptamine (psilocybin, B.), and the archetypal ergoline hallucinogen lysergic acid diethylamide (LSD, C.).
