methyl 2-O-benzyl-4,6-O-benzylidene-α-D-mannopyranoside 、
2,4-di-O-benzyl-3,6-dideoxy-α-D-xylo-hexopyranosyl chloride 生成 methyl 2-O-benzyl-3-O-(2,4-di-O-benzyl-3,6-dideoxy-β-D-xylo-hexopyranosyl)-α-D-mannopyranoside 、 methyl 2-O-benzyl-3-O-(2,4-di-O-benzyl-3,6-dideoxy-α-D-xylo-hexopyranosyl)-α-D-mannopyranoside