abstract the essential oil was obtained at yield of 0.37% by hydrodistillation from fresh leaf tissue of solidago decurrens lour collected from zhejiang province, china. gc and gc/ms analysis identified 33 components, representing 90.4% of the leaf oil. the main components were -elemene (30.8%), -elemene (6.4%), -caryophyllene (15.4%), -humulene (3.2%), -selinene (2.4%), germacrene d (4.5%), and ledene oxide-(ii) (13.1%).