Abstract
The present study reports the isolation of triterpenes from the species Protium strumosum (Daly) (Burseraceae). Partitioning of the methanolic extract of the leaves of P. strumosum followed by silica gel chromatographic purification (columns and preparative plates), led to isolation or characterization of the following triterpenes: epifriedelanol, friedeline, lupeol, lupenone, á-amyrin and â-amyrin and also the steroid â-sitosterol 3-O-glucoside. The compounds were characterized by spectroscopic means (1H-RMN, 13C-RMN, CG-EM, IV), co-injection experiments in GC-FID using authenticated patterns, and also by identifying the acetylated derivatives. The isolation of 3-epifridelanol as the majors constituent in the less polar fraction might be related with the anti-inflammatory potential of such Protium species.