Prior toGC–MS analysis the oils were dried to remove hydrosol emulsions using anhydrous NaSO4 powder (0.5 g in 10 ml oil for more than 24 h). Oils were then dissolved in dichloromethane (DCM) at a ratio of 1:1000. Identification was performed by comparison of mass spectra with an electronic library database (NIST08) and confirmed using arithmetic indices(IUPAC, 1997),