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