Sesquiterpene Hydrocarbons Rich Essential Oil ofStachys sericeaWall

The GC and GC-MS analysis of the essential oil of S. sericea Wall. showed dominant presence of sesquiterpene hydrocarbons (79.1 %) with germacrene D (37.7 %), (E)-ß-caryophyllene (17.4 %), ô-cadinene (6.0 %) and (E)-ß-farnesene (3.9 %) as major constituents. (X-Bisabolol (3.0 %) was the major oxygenated sesquiterpenoid along with several minor constituents.