Essential Oil of Haplophyllum tuberculatum (Forssk.) A. Juss. from the United Arab Emirates

Abstract Essential oils of Haplophyllum tuberculatum (Forssk.) A. Juss., produced from plants collected in the United Arab Emirates, were analyzed by GC and GC/MS. The composition of the oils varied considerably. Those obtained from plants collected in May (1997 and 2001) were similar, with α-phellandrene (10.7–32.9%) being the major component and with signifcant amounts of β-caryophyllene (6.3–12.8%), β-pinene (7.6–8.0%), limonene (4.0–9.6%) and δ-3-carene (5.5–6.0%). However, the oil distilled from plants collected in April (1998) had major components of linalool (15.0%), linalyl acetate (10.6%), β-caryophyllene (9.7%) and α-terpineol (6.7%). The compositions of all three oils prepared from UAE collected plants differed signifcantly from those reported for the same species col-lected in Egypt and Iran.

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