3-O-beta-D-glucopyranosylpresenegenin-28-O-beta-D-galactopyranosyl-(1-4)-(beta-D-xylopyranosyl-(1-3))-beta-D-xylopyranosyl-(1-4)-alpha-L-rhamnopyranosyl-(1-2)-(3,4-di-O-acetyl)-beta-D-fucopyranosyl ester