Fig. 3

Representative GC–MS chromatogram of AKS for its volatiles analyzed by SPME coupled to GC–MS. The corresponding volatile names for each major peak follow that listed in Table 2. G4: α-Phellandrene, G6: p-Cymene, G8: 1,8 Cineole, G18: Daucene, G19: β-Caryophyllene, and G21: α-Humulene.