Volatile Constituents of the Essential Oil of Hymenocrater elegans Bunge

Hymenocrater elegans Bunge was collected from Firoozkooh in northeast Iran in July 2003. Dried leaves of the plant were steam distilled in a Kaiser-Lang apparatus for 45 min. The oil was produced at the yield of 0.1% (based on dry weight). GC and GC/MS analysis of this oil revealed the presence of 33 compounds, among which germacrene D (10.2%), β-caryophyllene (9.7%), α-humulene (9.6%), β-bourbonene (7.1%) and germacrene B (6.9%) were the major constituents.