methyl (2,3,4-tri-O-benzyl-6-O-p-nitrobenzoyl-α-D-glucopyranosyl)-(1<->4)-(5,6-di-O-benzyl-8-O-p-nitrobenzoyl-β-D-glycero-D-ido-oct-4-ulofuranosid)onate 生成 (2S,3S)-3-[(2S,3S,4R,5R)-3,4-Bis-benzyloxy-5-hydroxymethyl-2-((2R,3R,4S,5R,6R)-3,4,5-tris-benzyloxy-6-hydroxymethyl-tetrahydro-pyran-2-yloxy)-tetrahydro-furan-2-yl]-2,3-dihydroxy-propionic acid methyl ester