The essential oil was extracted for 2 h by hydrodistillation in a Clevengertype apparatus with a separate extraction chamber. The EO was dried over anhydrous sodium sulfate. EO componentanalys is was performed by direct injection in a gas chromatogra-phy/mass spectroscopy detector (GC.MS) on a Hewlett-Packard5890 GC interfaced with a Hewlett-Packard 5970 Series II massspectrometer fitted with a column (HP-5MS, 30 m ~ 0.25 mm innerdiameter, temperature range 50.240.C at 5.C/min). Helium was used as the carrier gas (flow rate = 0.9 mL/min). The mass spectrum was obtained at an ionization voltage of 70 eV. Identification of the components was based on comparison of their relative retention times and mass spectra with those obtained from authentic samples and/or the NIST MS 05 version 2.0. C7.C30 saturated alkanes(Supelco, from Sigma.Aldrich St. Louis, MO, USA) were used as reference points in the calculation of relative retention indices (RI)(Adams, 2007)