3 beta,8 alpha-O-Di(4-hydroxytigloyl)-1 alpha H, 5 alpha H,6 beta H,7
alpha H-guai-4(15),10(14),11(13)-triene-6,12-olide; a new guaianolide,
has been isolated from the aerial parts of Centaurea scoparia togethe
r with nine known ones. (C) 1997 Elsevier Science Ltd.