3-(O-beta-((beta-D-xylopyranosyl-(1-->2))- (beta-D-glycopyranosyl-(1-->6))-beta-D-glucopyranosyl-(1-->4))-(be ta-D- glucopyranosyl-(1-->2))-alpha-L-arabinopyranosyl)-3 beta,16 alpha,28-trihydroxy-olean-12-en-30-oic acid