2-(trimethylsilyl)ethyl 2,3,4-tri-O-benzyl-α-L-fucopyranosyl-(1->4)-2,3-di-O-acetyl-6-O-benzyl-α-D-mannopyranosyl-(1->4)-2,3-di-O-benzyl-6-O-(4-methoxybenzyl)-β-D-glucopyranoside