GC: The essential oils were analysed on a AGILENT gas chromatograph Model 6890, equipped with a DB5 MS column (30m X 0.25mm; 0,25 m), programming from 50°C (5 min) to 300°C at 5°C/min, 5 min hold. Hydrogen as carrier gas (1.0 ml/min); injection in split mode (1:60); injector and detector temperature were 280 and 300°C respectively. The essential oil was diluted in hexane: 1/3