Guaianolides from Centaurea chilensis and Centaurea floccosa

Abstract

Al/S dem Cllloroform-Exlrakl da oberirdisclren Teile I'on Cemaurea clrilellsis IIIld Celltaurea floccosa II'I/rden ZII-ei hekallll/e Guaiallolit/e i.wlierr, 811-aCCIOXI'l/elrl'dmcoslu.\· laclO/I I 11I11/ cy"aropicri" 2. Die /denli· fi~ierltllg i1lrer'S/I'llkwren elfogle durclr eill- IlIld ZlI'eidimensionale / H- I/Ild /3C-NMR-Mellroden. Dabei geJillgl die m//slclllt/ige Zuordllllllg al/er Signale. nle e/¡/oroforlll eXlrael o( aaral parrs of Celltal/rea chilrmis a/l{1 Cefl/al/rea j70ecosa afforded /l"o k"o"," guuiullolidCl. /:ju-l/eelOxydelrydroCOSII/.\ /actalle 1 alld :-y"aropicrin 2. Tlreir .\trI/CWres lI'ere idemified by oneand /ll'o-dimensiollal/ H alld 13C /I'M R melllOds. FI/I/ signul assignment is aclliel'ed.