“…Similar investigations carried on volatile constituents of a closely related species from Ethiopia (A. rehan) revealed camphor (26.4%) and davanone (41.2%) as the two major constituents [33]. The main components and dominant classes of terpenoids were found to differ compared to chemotypes previously reported of the same species, such as a-thujone, b-thujone, sabinene, myrcene, (E)-sabinol, (E)-sabinyl acetate, linalyl acetate and geranyl propionate [32] [34], caryophyllene oxide, p-cymene, and 1,8-cineole [22], and (Z)-chrysanthenol in [35]. Some reports indicate possibility of essential oil composition variations among the same plant species growing in different countries and geographic locations [22] [34 -36], plant habitat and season of collection [37], and the extraction technique employed [38].…”