Olean-12-ene-28,29-dioic acid, 3-((3,4-di-O-acetyl-alpha-L-arabinopyranosyl)oxy)-, 28-(O-6-deoxy-alpha-L-mannopyranosyl-(1-6)-O-beta-D-glucopyranosyl-(1-4)-beta-D-glucopyranosyl) ester, (3beta,20alpha)-