Essential Oil Composition of Salvia tebesana Bunge (Lamiaceae) from Iran

Salvia tebesana Bunge (Lamiaceae) is an endemic medicinal species which grows wild in center of Iran. In the present study, chemical composition of the essential oil of the plant at two developmental stages (vegetative and full flowering) was reported for the first time. The essential oils were obtained by hydrodistillation from air-dried samples and analyzed by GC-FID and GC-MS. The yield of oil (w/w %) in different stages was in the order: full flowering (0.32 %) > vegetative (0.14 %). In total 44 and 61 constituents were identified and quantified in the studied samples representing 99.6 and 99.2 % of the total oil, respectively. The main constituents were 7-epi-α-eudesmol, (E)-nerolidol, (E)-caryophyllene, α-pinene, caryophyllene oxide, and δ-cadinen. Oxygenated sesquiterpens (43.7% and 48.2%) followed by sesquiterpene hydrocarbons (30.3% and 32.7%) were the main group of compound in the oil of the plant at vegetative and full flowering stages, respectively.