TRITERPENOID GLYCOSIDES FROM CEPHALARIA-TRANSSYLVANICA

On the basis of spectroscopic and chemical methods, the structures of two new triterpenoid glycosides, transsylvanoside E and F, isolated fr om Cephalaria transsylvanica have been established as 3-0-[beta-D-xylo pyranosyl (1 --> 3)-alpha-L-rhamnopyranosyl (1 --> 4)-beta-D-glucopyra nosyl (1 --> 4)-beta-D-glucopyranosyl (1 --> 2)-beta-D-xylopyranosyl]- 3 beta,23-dihydroxy Delta(12)-oleanen-28-carboxylic acid and 3-0-[beta -D-glucopyranosyl (1 --> 3)-alpha-L-rhamnopyranosyl (1 --> -beta-D-xyl opyranosyl]-28-0-[beta-D-glucopyranosyl (1 --> 4)-beta-D-glucopyranosy l]-3 beta,23-dihydroxy Delta(12)-oleanen-28-carboxylic acid, respectiv ely. A new proglycoside was isolated from the cleavage of the ester-gl ycoside linkage and it's structure characterized as 3-0-[beta-D-glucop yranosyl (1 --> 3)-alpha-L-rhamnopyranosyl (1 --> 4)-beta-D-xylopyrano syl]-3 beta,23-dihydroxy Delta(12)-oleanen-28-carboxylic acid.