Abstract
Roots, green parts and flower heads of Centaurea nervosa and C. phrygia were examined separately. Eight flavones, nine polyacetylenes and four tetraenic aldehydes of known structures, together with aplotaxene and the lignan (−)-aretigenin were isolated and characterized. The flavones apigenin, kaempferol 3-methyl ether, kaempferol 3,6-dimethyl ether, centaureidin, jaceidin and hispidulin were found in appreciable amounts in both plants.
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