methyl O-(3,4,6-tri-O-acetyl-2-deoxy-2-(2,2,2-trichloroethoxycarbonylamino)-β-D-glucopyranosyl)-(1->4)-(2,3-di-O-benzyl-6-O-(4-methoxybenzyl)-β-D-glucopyranosyl)(1->3)-2-azido-4,6-O-benzylidene-2-deoxy-β-D-glucopyranoside