Javier Bernardo Lopez ArzeGuy J. CollinFrançois-Xavier GarneauFrance-Ida JeanHélène Gagnon2026-03-222026-03-22200410.1080/10412905.2004.9698747https://doi.org/10.1080/10412905.2004.9698747https://andeanlibrary.org/handle/123456789/45908Citaciones: 12Abstract 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 IIenAsteraceaeEssential oilBotanySesquiterpeneChemistryp-Cymenearticle