Essential oil composition of <i>Achillea santolina</i> L. and <i>Achillea biebersteinii Afan.</i> collected in Jordan

Abstract The essential oils of Achillea santolina L. and A. biebersteinii Afan., collected in Jordan, have been studied. The former has never been previously investigated, while the latter evidenced from a literature survey a high variability. The two oils were quite different: A. santolina oil showed mainly 1,8‐cineole, camphor, 4‐terpineol and trans ‐carveol, while A. biebersteinii oil contained cis ‐ascaridole, p ‐cymene, carvenone oxide and camphor among its principal constituents. This is the second report of carvenone oxide from a natural source. Copyright © 2002 John Wiley &amp; Sons, Ltd.

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