Further investigation of antitumor condurangoglycosides with C-18 oxygenated aglycone.

Abstract

Four antitumor active condurangoglycosides-B0, -D0 and 20-O-methyl- and 20-iso-O-methyl-condurangoglycoside-D0 were isolated. Their structures were established by chemical and spectral data. Their antitumor activities and toxicities [in mice] are described.