2-(trimethylsilyl)ethyl 3,4,6-tri-O-benzyl-2-O-p-methoxybenzyl-α-D-galactopyranosyl-(1->3)-2-acetamido-4,6-di-O-acetyl-2-deoxy-α-D-glucopyranosyl-(1->3)-2-O-benzoyl-4-O-benzyl-α-L-rhamnopyranoside