Fig. 1

GC–MS chromatogram of leaf EOs from Ocimum species. A O. americanum B O. basilicum. The EOs obtained from O. americanum had 34 compounds and contained camphor (33.86%), limonene (7.21%), longifolene (6.72%), veridiflorol (5.85%), isoledene (5.472), and α-pinene (5.19%) as the main chemical components (Table 2 and Fig. 2)