Essential oil composition of two endemic Centaurea species from Turkey

Essential oil composition of Centaurea austroanatolica Hub.-Mor. and Centaurea kizildaghensis Uzunh., E. Dogan & H. Duman were analyzed by means of gas chromatography-mass spectrometry (GC-MS). Sixty and fourty six compounds were identified in the essential oils of C . austroanatolica and C . kizildaghensis , respectively. The major components were determined hexadecanoic acid (21.3%), caryophyllene oxide (4.8%), dodecanoic acid (4.2%) and heptacosane (3.5%) in C . austroanatolica oil, hexadecanoic acid (24.4%), phytol (9.3%), caryophyllene oxide (3.8%) and salvial-4(14)-en-1-one (3.1%) in C . kizildaghensis oil.