Figure 5.57: Steam distillation of bay leaves. The main peaks in the GC spectrum of the essential oil are eucalyptol ($$5.69 \: \text{min}$$, $$14\%$$), umbellulone ($$6.70 \: \text{min}$$, $$54\%$$), and 4-terpineol ($$6.74 \: \text{min}$$, $$19\%$$).