TRITERPENOID SAPONINS FROM ZYGOPHYLLUM SPECIES

From the roots of Zygophyllum coccineum and the aerial parts of Z. alb um and Z. dumosum, the new triterpenoid saponin -O-[beta-D-2-O-sulphon ylquinovopyranosyl]-quinovic acid-27-O-[beta-D-glucopyranosyl] ester ( zygophyloside F) has been isolated. The known saponins, 3-O-[beta-D-qu inovopyranosyl]-quinovic acid 27-O-[beta-D-glucopyranosyl] ester and 3 -O-[beta-D-quinovopyranosyl]-quinovic acid, were isolated from the aer ial parts of Z. dumosum. The structures were determined primarily on t he basis of NMR spectroscopy. The assignment of the NMR signals were p erformed by means of H-1-H-1 COSY - 45 degrees, HMQC, HMBC and TOCSY e xperiments.