Chemical Composition of Leaf and Inflorescence Essential Oils of Eupatorium cannabinum L. from Eastern Lithuania

Abstract

Content and composition of the essential oils of Eupatorium cannabinum L. have been studied. The plants were collected on Neris riverbank in Vilnius district at full flowering stage; oils were prepared by hydrodistillation and analyzed by GC and GC/MS. Germacrene D has been found as a first principal component in five out of six investigated oils (9.1–12.3%) and in one flower oil as third main compound (7.7%). Neryl acetate was a second major constituent in all leaf oils (average mean: 9.4%) and in two samples of in florescence oils (7.9% and 8.2%), while another ester neryl isobutyrate was the third dominant component in one flower oil. Methyl thymol was the first main compound in one flower oil and the fourth in all investigated leaf oils (average mean: 5.7%). β-Bisabolene comprising 7.1% and 5.6% was second or fourth constituent in two in florescence, and as third compound (6.7% and 8.6%) in two leaf oils. Seventy-nine identified compounds formed up 71.9–83.8% of total oil content. Monoterpenes and oxygenated monoterpenes dominated both in the in florescence and leaf oils (36.9–59.3% and 36.5–44.3%, respectively), while the amount of sesquiterpenoids was 22.7–31.8% in the flower and 31.7–38.3% in leaf oils.