b-D-Glucopyranoside, (3b,25R)-17,27-dihydroxyspirost-5-en-3-ylO-6-deoxy-a-L-mannopyranosyl-(1®2)-O-[6-deoxy-a-L-mannopyranosyl-(1®4)-6-deoxy-a-L-mannopyranosyl-(1®4)]-