Chemical Composition of the Essential Oil of the Local Endemics Centaurea davidovii and C. parilica (Asteraceae, sect. Lepteranthus) from Bulgaria

In the present study the chem. compns. of the essential oils from aerial parts of Centaurea davidovii Urum. and C. parilica Stoj. & Stef., both endemic to Bulgaria, were evaluated by GC and GC-MS. The main components of C. davidovii were β-eudesmol (13.9%), spathulenol (13.3%), caryophyllene oxide (10.1%) and (Z)-phytol (5.4%). the main components of C parilica were hexadecanoic acid (39.2%), (Z,Z)-9,12-octadecadienoic acid (11.9%), caryophyllene oxide (6.8%) and spathulenol (6.6%). In order to compare the essential oils compn. of these taxa and of related species a PCA anal. was carried out