Composition of the Essential Oils of Five Coleonema Species from South Africa

摘要

Hydrodistilled essential oils from the herbal parts of Coleonema album (Thunb.) Bartl. et H.L. Wendl., C. aspal-athoides Juss et Don, C. calycinum (Steud.) I. Williams, C. pulchellum I. Williams (three samples) and C. virgatum (Schltdl.) Eckl. et Zeyh. were analyzed by GC and GC/MS. Forty-three compounds were characterized in the oil of C. album representing 99.1% of the total composition. Main compounds were β-phellandrene (30.4%) and myrcene (20.5%). Forty-three compounds were characterized in the oil of C. aspalathoides representing 94.1% of the oil with sabinene (24.0%), terpinen-4-ol(12.2%), p-cymene (12.1%), linalool (11.3%) and α-pinene (9.1%) as main constituents. In the oil of C. calycinum, 35 compounds were characterized representing 99.4% of the total volume. β-Phellandrene (42.0%) and linalool (11.0%) were the main constituents. Monoterpene hydrocarbons were the main constituents in three oil samples of C. pulchellum. Myrcene (63.0%) was the main constituent in the oil of C. virgatum in which 23 compounds were identified representing 97.3% of the total.