Essential Oil composition and volatile constituents of Adenostyles briquetii Gamisans (syn. Cacalia briquetii)

Abstract

International audienceThe essential oil of Adenostyles briquetii Gamisans (syn. Cacalia briquetii; family Asteraceae), an endemic species from Corsica, has been studied by GC (retention indices), GC/MS(EI and CI) and 13C-NMR. Thus, 142 components were identified representing 93% of the total amount. The essential oil was characterized by sesquiterpene hydrocarbons (52.8%) and oxygenated sesquiterpenes (25.9%). The major components were germacrene D (18.5%), zingiberene (12.9%) and -oplopenone (10.8%). In this study, the non terpenic esters of the oil have been investigated by GC/MS in different ionization modes: electron impact (EI), positive and negative chemical ionization (PCI and NCI) using ammonia as reagent gas. Furthermore, the analysis of volatile fraction of this plant was carried out using headspace-SPME and showed zingiberene, germacrene D, -elemene as the main components. To our knowledge, this work is the first report on the essential oil composition and on the volatile constituents of Adenostyles briquetii