Sesquiterpene lactones. XXXVI. Sesquiterpene lactones in several subgenera of the genus Centaurea L.

Abstract

The occurrence of both known and new sesquiterpene lactones was determined in six species classified in different subgenera of <em>Centaurea L. </em>Chlorojanerin, cynaropicrin and janerin were isolated from <em>C. phaeopappoides </em>Bordz. and <em>C. thracica </em>(Janka) Hayek. <em>C. marschalliana </em>Spreng. was found to contain acroptilin, chlorojanerin, cebellin D and janerin while <em>C. adjarica </em>Alb. had repin, acroptilin, chlorojanerin, centaurepensin, janerin, repidiolide, cebellin D, E, F and L A new, hitherto underscribed cebellin J quaianolide was found in <em>C. bella </em>Trautv. and another germacranolide, 3α, 15-dihydroxycostunolide was found in <em>C. sphaerocephala </em>subsp. <em>lusitanica </em>(Boiss. et Reuter) Nyman.