preferred_name: 3-O-alpha-L-rhamnopyranosyl-(1-2)(beta-D-glucopyranosyl-(1- 4))-alpha-L-arabinopyranosyl-27-hydroxyoleanolic acid 28-O-alpha-L-rhamnopyranosyl (1-4)-beta-D-glucopyranosyl (1- 6)-beta-D-glucopyranoside