(3beta,22S,25S)-26-(beta-D-glucopyranosyloxy)-22,25-epoxyfurost-5-en-3-yl 6-deoxy-alpha-L-mannopyranosyl-(1->4)-[beta-D-glucopyranosyl-(1->3)-beta-D-glucopyranosyl-(1->2)]-beta-D-glucopyranoside