Composition and antioxidant activity of the essential oils of Thymus trautvetteri Klokov & Des.-Shost., Thymus migricus Klokov & Des.- Shost. and Thymus caespititius Brot. from Iran

摘要

The chemical composition of the essential oils of Thymus trautvetteriKlokov& Des.-Shost., Thymus migricusKlokov& Des.-Shost.and Thymus caespititiusBxot.growing wild in Iran were examined by GC and GC±MS. Elaven components were characterized for Thymus trautvetteriwith a- Terpinen-7-al (58.62%), P-Cymene (10.9%) andThymol,methyl ether (6.20%) as the major constituents. For Thymus caespititius, 12 components were identified with Z-Nerolidoli (17.91%), 1,8- Cineol (13.91%) andThymol (13.33%), as the major constituents and in Thymus migricus,16 compounds have been identified. p-Cymen-7-ol (35.98%), cis- Sabinene hydrate (10.45%) and P-Cymene (10.26%) were the main components of this essential oil. Also The essential oils of T. trautvetteri, T. caespititius and T. migricus were subjected to screening for their possible antioxidant activities using 2,2-dip'he-nyl-1 -picrylhydrazyl (DPPH) assay method. Thymus migricus showed the best radical scavenging activity with an averaged IC_(50)value of 3.1 ±0.15 μg/ml.