The ‘H and 13C NMR spectra showed that compounds 4, C47H740,8, and 5, C48H76019, were the 3-0-
glycosides of oleanolic acid having three monosaccharide units. On acid hydrolysis, both compounds afforded glucuronic acid and glucose as the common sugar components. Furthermore, arabinose and galactose were detected from the hydrolysate of compounds 4 and 5, respectively. Detailed analyses of the ‘H and 13C NMR spectra of both compounds suggested that all of these sugars were of the pyranose type, and their anomeric configurations were as follows: glucuronic acid, glucose and galactose were p and arabinose was tl (Tables 1, 2 and 3). The structures of both sugar moieties were investigated by the ROE experiment, and were deduced as the same as in
the case of 3. Based on these experiments, the structures of compounds 4 and 5 were characterized as shown.