Estudo dos constituintes químicos das espécies Byrsonima variabilis Juss. Stigmaphyllon tomentosum Juss

Abstract

The main objective of the present phytochemical dissertation was the isolation of iridoids in the Stigmaphyllon tomentosum Juss species, Malpighiaceae. However, no iridane compound was isolated. In the hexanic extract of the leaves, the following steroids were isolated: stigmasterol (71) and β-sitosterol (72), and five triterpenes: α-amyrin (94), β-amyrin (96), friedelin (100), friedelinol (111), and lupeol (112). These substances are in accordance with the registered profile for the Malpighiaceae family and correspond with the botanical classification of the S. tomentosum Juss. species. In the ethanolic extract of the leaves, the flavonoid glycoside: 3,7-di-O-α-L-rhamnopyranosyl-4',5- dihydroxyflavonol (117) was isolated, a substance with an antiinflamatory activity. In the ethanolic extract of the Byrsonima variabilis Juss flowers, the following substance were xi isolated: ethyl gallate (104), eriodictyol (105), luteolin (106) and quercimeritrin (110). isolation of the substances: (105), (106), (110), (111). (112) and (117) in the Malpighiaceae family,