[01] Hussein A. H. Said-Al Ahl, Department of Medicinal and Aromatic Plants, National Research Centre, 33 El Bohouth St. (former El Tahrir St.)-Dokki, Giza, Egypt. [02] Zahid K. Abbas, Department of Biology, Faculty of Science, University of Tabuk, P.O. Box 741, Tabuk 71491, Saudi Arabia. [03] Ali S. Sabra, Department of Medicinal and Aromatic Plants, National Research Centre, 33 El Bohouth St. (former El Tahrir St.)-Dokki, Giza, Egypt. [04] Kirill G. Tkachenko, V.L. Komarov Botanical Institute of the Russian Academy of Sciences, 2, Professora Popova str., Saint Petersburg, Russia.

Hyssopus officinalis L. belonging to the family Lamiaceaeis a perennial herb known as a culinary and medicinal herb. The chemical constituents of essential oil by hydro distillation from the aerial parts of Hyssopus officinalis L. from Egypt were identified by gas chromatograph-mass spectrometer (GC-MS) demonstrated the presence of 33 compounds. The major constituents of H. officinalis oil were cis-pinocamphone (26.85 %), β-pinene (20.43 %), trans-pinocamphone (15.97%), α-elemol (7.96 %), durenol (3.11%), β-phellandrene (2.41%), caryophyllene (2.34%), (E)-2,6-dimethyl-1,3,5,7-octatetraene (2.27%), 3(10)-caren-4-ol,acetoacetic acid ester (2.14%), bicyclogermacrene (1.83%), myrtenol (1.73%), germacrene-D (1.68%), limonene (1.56%), γ-eudesmol (1.36%) and linalool (1.08%).

Hyssopus officinalis, Essential Oil, Cis-Pinocamphone, β-Pinene, Trans-Pinocamphone

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