Collect. Czech. Chem. Commun. 1986, 51, 1698-1709
https://doi.org/10.1135/cccc19861698

Sesquiterpene lactones of Urospermum dalechampii SCHMIDT

Urszula Rychłewskaa, Derek J. Hodgsonb, Halina Grabarczykc, Bohdan Drożdżc, Włodzimierz M. Daniewskid, Wojciech Kroszczyṅskid, Miloš Buděšínskýe and Miroslav Holube

a Laboratory of Crystallography, Department of Chemistry, Adam Mickiewicz University, Poznan, Poland
b Department of Chemistry, University of North Carolina, Chapel Hill, N.C. 27514, U.S.A.
c Department of Medicinal Plants, Academy of Medicine, 60-623 Poznan, Poland
d Institute of Organic Chemistry, Polish Academy of Sciences, Warsaw, Poland
e Institute of Organic Chemistry and Biochemistry, Czechoslovak Academy of Sciences, 166 10 Prague, Czechoslovakia

Abstract

In the species Urospermum dalechampii SCHMIDT urospermal A (I) and 11βH,13-dihydrourospermal A (II) were detected. The latter compound was also detected in U. picroides SCHMIDT. The spectral characteristics of both lactones were completed by 13C NMR data. The structure of 11βH,13-dihydrourospermal A (II) was also confirmed by X-ray analysis.