The GC/MS analysis was carried out on a Hewlett
Packard 5890 SERIES II chromatograph, coupled with a
mass spectrometer of the Hewlett Packard 5971 SERIES
type operating in the EI mode at 70 eV. The capillary
column type was DB5-MS (30 m x 0.25 mm i.d.; film
thickness 0.25 μm). The amount of sample injected and
GC/MS parameters were the same as above.