The column temperature was raised from 50 to 200_C at a rate of 10_C/min and held at 200_C for 5 min. Helium was used as the carrier gas at a flow rate of 0.6 mL/min. Perillaldehyde in the extract was identified by comparing the retention time (11.0 min) and the mass spectra with the purchased standard sample (Extrasynthese, Genay, France).