Collect. Czech. Chem. Commun. 1989, 54, 1903-1918

Sesquiterpene lactones of Cephalophora aromatica (HOOK.) SCHRADER and their deterrent activity. The stereostructure of geigerinin

Ełżbieta Błoszyka, Aleksandra Dudekb, Zofia Kosturkiewiczb, Urszula Rychłewskab, Włodzimierz M. Daniewskic, Maria Gulumkac, Jan Nawrotd, Miloš Buděšínskýe, Soňa Vašíčkováe and Miroslav Holube

a Department of Medical Plants, Academy of Medicine, Poznań, Poland
b Department of Crystallography, A. Mickiewicz University, Poznań, Poland
c Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw, Poland
d Institute of Plant Protection, Poznań, Poland
e Institute of Organic Chemistry and Biochemistry, Czechoslovak Academy of Sciences, Prague 6, Czechoslovakia


From species Cephalophora aromatica (HOOK.) SCHRADER the authors isolated a series of previously described sesquiterpene lactones I-V and newly the lactone geigerinin (VI). Its structure was confirmed by X-ray analysis and its absolute configuration was determined on the basis of the CD spectra of its complex with Pr(thd)3. The lactones I-VII were tested for antifeedant activity against main crop pests.