The GC/MS analysis of the methanol extract was carried out by sonicating a 10-mg sample for 15 min in 2.5 mL of dichloromethane at 40 °C in a sealed vial. Then, 1 mL of the treated extract sample was filtered through a 0.20-μm nylon filter into a standard GC 2-mL vial for analysis. The GC/MS analyses were performed at an ionization energy of 70 eV while separation of the hydrocarbons and other volatile compounds were determined using a GCMS-QP2010 series GC system (Shimadzu, Japan) equipped with a DB-5MS Agilent nonpolar column (30 mm × 0.25 mm, 0.25 mm) (Agilent Technologies Inc., Tokyo, Japan). The oven was initially programmed to run at a temperature of 60 °C for 2 min, followed by an increase of 7 °C/min to 150 °C, with a final hold at 310 °C for 15 min. The injector and detector temperatures were kept at 300 (split) and 310 °C, respectively.