3-O-alpha-L-arabinopyranosyl(1->3)-(B-D-galactopyranosyl(1->2))-B-D-glucuronopyranosyl-3B-16alpha-dihydroxy-23-oxo-olean-12-en-28-oic acid 28-O-beta-D-xylopyranosyl(1->4)-(beta-D-glucopyranosyl(1->2))-alpha-L-rhamnopyranosyl(1->2)-beta-D-fucopyranoside