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Lo studio di un campione di epéna, polvere allucinogena per inalazione preparata dai Bisashi-teri a partire da corteccia di Virola sp. consente di rilevare la presenza di un solo alcaloide la 5-0-metil-bufotenina. In base al confronto delle composizioni di vari campioni di polveri allucinogene si propone di limitare la denominazione di yopo alle preparazioni ottenute da semi di Leguminosae [Piptadenia sp. (syn. Anadenanthera), Acacia sp. Mimosa sp.] e quella di epéna agli allucinogeni preparati...
A new natural substance, cordoin, CHO, was isolated from Cordoa placa (genus Lonchocarpus) a plant growing in North East Brazil. Through the physico-chemical properties (u.v., ir. and nmr spectra) and mass fragmentation pattern, and the chemical reaction the structure of was attributed to cordoin. This is the first example of O-prenylated chalcone found in nature. Its presence in Lonchocarpus may account for the biogenesis of rotenoids.
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