Chemical composition of the essential oil of Eryngium billardieri F. Delaroche from Iran

A hydrodistilled oil from the aerial parts of Eryngium billardieri F. Delaroche was analyzed by a combination of GC and GC/MS, Forty-two components were identified representing more than 97.2% of the oil. The main constituents of the oil were alpha-muurolene (42.0%), beta-gurjunene (17.0%), delta-cadinene (6.2%) and valencene (5.7%).