Essential oil analysis of two endemic Eryngium species from Serbia

The volatile composition of two Eryngium species was studied. The es­sen­tial oils were obtained by hydrodistillation in a modified Clevenger-type appara­tus, and their analyses were performed by GC and GC–MS. A total of 58 different compounds were identified. Their main constituents were as follows: E. serbicum: germacrene D (19.7 %), b-elemene (10.0 %) and spathulenol (6.9 %); E. palmatum: sesquicineole (21.3 %), caryophyllene oxide (16.0 %), spathulenol (16.0 %) and sa­binene (5.5 %). The main portion in both studied taxa consisted of sesquiterpenes