methyl 3,4-di-O-benzyl-2-deoxy-2-<(2',2'-dimethoxycarbonylvinyl)amino>-6-O-trityl-α-D-glucopyranoside

methyl 3,4-di-O-acetyl-2-deoxy-2-<(2,2-dimethoxycarbonylvinyl)amino>-6-O-toluene-p-sulfonyl-α-D-glycopyranoside