2.

Essential Oil Composition from Oleogum Resin of Soqotraen Commiphorakua

Nasser A. Awadh Ali, Martina Wurster, Norbert Arnold, Ulrike Lindequis and Ludger Wessjohan

1 Department of Pharmacognosy, Faculty of Pharmacy, Sana’a University, P.O. Box 13150, Yemen

2 Department of Pharmaceutical Biology, Institute of Pharmacy , Ernst-Moritz-Arndt-University, Greifswald , Friedrich-Ludwig-Jahn-Str. 17, D-17487 Greifswald , Germany

3 Leibniz Institute of Plant Biochemistry, Department of Bio-organic Chemistry, Weinberg 3, 06120 Halle/Saale, Germany

Abstract: The major constituents of the essential oil obtained by hydrodistillation from the oleogum resin of Commiphora kua Vollesen were identified by GC-MS. Sixteen constituents were detected from the essential oil, which constituted about (90.5%) of the total amount. Major constituents of the oil were α- cadinol (33.0%), g -cadinene (22.5%), d -cadinene (17.0%), isocaryophyllene (3.7%), allo-aromadendrene (2.8%), α-muurolene (2.7%), and α-humulene (2.4%). The Oil of Commiphora kua showed moderate antifungal activity against Cladosporium cucumerinum.

Keywords: Essential oil, Commiphorakua, Soqotra, GC-MS, α- cadinol , Cladosporium