3-O-α-L-Rhamnopyranosyl (1→2)[β-D-glucopyranosyl (1→4)]-α-L-arabinopyranosyl-27-hydroxyoleanolic acid 28-O-α-L-rhamnopyranosyl (1→4)-β-D-glucopyranosyl (1→6)-β-D-glucopyranoside, 98%