[3β-[(4-O-β-D-Glucopyranosyl-6-deoxy-α-L-mannopyranosyl)oxy]-26-(β-D-glucopyranosyloxy)-22α-hydroxy-5β-furost-25(27)-en-1β-yl]2-O-(6-deoxy-α-L-mannopyranosyl)-β-D-glucopyranoside