Elemanolide sesquiterpenes and eudesmane sesquiterpene glycosides from Centaurea hierapolitana

Elemanolide sesquiterpenes, hierapolitanins A and B (1, 2), eudesmane-type sesquiterpene glycosides, hierapolitanins C and D (6, 7) were isolated from the aerial parts of Centaurea hierapolitana Boiss. (Asteraceae). Hierapolitanins C and D represent the first two members of sesquiterpene glycosides in Centaurea L. genus.