The essential oil obtained from the aerial parts of Zilla macroptera Coss. (Brassicaceae),
endemic species of the south of Algeria and southeast of Morocco, was analysed by GC and GC – MS.
The analysis revealed 72 compounds accounting for 88.53 % of the oil. Geranyl butyrate (13.52%),
Caryophyllene oxide (6.76%) and Carvone oxide (5.97%) were the main compounds of Z. macroptera
Coss. This paper presents the rst detailed study of the essential oil composition of Z. macroptera
Keywords: Carvone oxide, caryophyllene oxide, essential oil, GC/MS, geranyl butyrate, Zilla macroptera Coss.
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