Chemical constituents from Terminalia glabrescens

Abstract

Das folhas de Terminalia glabrescens foram obtidos um novo triterpeno pentacíclico (3b,6b,23,28-tetraidroxiolean-12-eno), além dos ácidos ursólico, 2a-hidroxiursólico, oleanólico, maslínico, arjunólico, sumaresinólico e asiático, esqualeno, fitol, sitosterol-3-O-b-D-glucopiranosídeo e n-alcanos. Da casca do caule foram obtidos friedelina, taraxerol, lupeol, lupenona, betulina, betulona, ácido betulínico, arjunglucosídeo I, estigmastano-3b,6a-diol, b-sitosterol, (-) catequina, b-D-piranotagatose, b-D-furanofrutose e a-D-furanofrutose.

A new oleanane-type triterpene (3b,6b,23,28-tetrahydroxyolean-12-ene) was isolated from the leaves of Terminalia glabrescens, together with ursolic, 2a-hydroxyursolic, oleanolic, maslinic, arjunolic, sumaresinolic and asiatic acids, squalene, phytol, sitosterol-3-O-b-D-glucopyranoside and n-alkanes. Friedelin, taraxerol, lupeol, lupenone, betulin, betulone, betulinic acid, arjunglucoside I, stigmastane-3b,6a-diol, b-sitosterol, (-) catechin, b-D-pyranotagatose, b-D-furanofructose and a-D-furanofructose were obtained from the trunk bark.