Essential Oils from Bolivia II. Asteraceae:<i>Ophryosporus heptanthus</i>(Wedd.) H. Rob. et King

Abstract

Abstract The essential oil of the aerial parts of Ophryosporus heptanthus (Asteraceae) from Bolivia was analyzed by GC and GC/MS. The oil was characterized by a high percentage of santolinatriene (∼ 47%) and the presence of precocene II (∼ 8%) as the most important minor constituent. The other compounds were monoterpenes (∼ 16%), with p-cymene as the major compound (∼ 4.8%), sesquiterpenes (∼ 6%), oxygenated sesquiterpenes (∼ 8%) and oxygenated monoterpenes (∼ 4.5%). Key Word Index: Ophryosporus heptanthus Asteraceaeessential oil compositionsantolinatriene6,7-dimethoxy-2,2-(2H)-benzopyranprecocene II