Composition #2: MCKENNA, DJ., TOWERS, GHN., ABBOTT, F. MONOAMINE-OXIDASE INHIBITORS IN SOUTH-AMERICAN HALLUCINOGENIC PLANTS - TRYPTAMINE AND BETA-CARBOLINE CONSTITUENTS OF AYAHUASCA . journal of ethnopharmacology, 1984, vol. 10, no. 2, p. 195–223. DOI: 10.1016/0378-8741(84)90003-5.
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