3-O-beta-D-glucopyranosyl-2beta,3beta,27-trihydroxyolean-12-en-23,28-dioic acid 28-O-beta-D-xylopyranosyl(1-4)-beta-D-apiofuranosyl(1-3))-alpha-L-rhamnopyranosyl(1-2)-(alpha-L-rhamnopyranosyl(1-3)-beta-D-fucopyranoside