3 beta-O-(beta-D-glucopyranosyl-(1-6)-(alpha-L-arabinopyranosyl- (1-2))-beta-D-glucopyranosyl-(1-4)-(beta-D-glucopyranosyl-(1-2))-alpha-L -arabinopyranosyl)-16 alpha-hydroxy-30,28 beta-lactone-olean-12-ene