Volatile leaf oils of American Myrtaceae. III. Psidium cattleianum Sabine, P. friedrichsthalianum (Berg) Niedenzu, P. guajava L., P. guineense Sw., and P. sartorianum (Berg) Niedenzu.
The essential oils, hydrodistilled from the leaves of 5 species of Psidium (collected from trees growing in the Arizona State University Campus, Tempe), were analysed by GC-MS. The main constituent of the essential oil of P. cattleianum was β-caryophyllene (59.92±1.70%). The main constituents of P. friedrichsthalianum oil were β-caryophyllene (36.82±19.44%) and α-pinene (10.61±2.44%). The main constituents of the essential oil P. guajava were β-bisabolene (19.21±2.44%) and β-sesquiphellandrene (14.75±0.01%). The essential oil of P. guineense was dominated by β-bisabolene (13.18±2.00%) and α-pinene (12.85±5.42%). The essential oil of P. sartorianum was dominated by α-pinene (16.66±1.05%), β-caryophyllene (12.35±2.82%) and α-phellandrene (9.81±1.13%).