preferred_name: 3-O-beta-D-xylopyranosyl-(1-2)-alpha-L-arabinopyranosyl-(1-6)-beta-D-glucopyranosyl oleanolic acid 28-O-beta-D-xylopyranosyl-(1-4)-alpha-L-rhamnopyranosyl-(1-4)-beta-D-xylopyranosyl-(1-4)-alpha-L-rhamnopyranosyl-(1-3)-beta-D-glucopyranosyl ester