Essential oil composition of Hypericum triquetrifolium Turra growing wild in Iran

Abstract

The chemical composition of the volatile oil from aerial parts of Hypericum triquetrifolium Turra was studied by GC-MS. Fifty components (97.1 of the total composition) were detected in the volatile oil. Germacrene-D (21.7), b-caryophyllene (18.3), d-cadinene (6.4), trans-b-farnesene (4.3), a-humulene (3.8), b-selinene (3.7), -cadinene (3.3) and trans-phytol (3.2) were found to be the major constituents of the oil. The oil of H. triquetrifolium consisted of five monoterpene hydrocarbons (3.4), two oxygenated monoterpenes (0.4), twenty-two sesquiterpene hydrocarbons (77.1), eight oxygenated sesquiterpenes (7.9) and one oxygenated diterpene (3.2). Twelve nonterpenic compounds were also consisted 5.1 of the oil. In conclusion, the oil of H. triquetrifolium was characterized by a high content of sesquiterpenes (85.0), whereas monoterpenes contained only 3.8 of the essential oil.