benzyl 2-acetamido-6-O-benzyl-2,4-dideoxy-4-fluoro-3-O-(2,3,4,6-tetra-O-acetyl-β-D-galactopyranosyl)-α-D-glucopyranoside 生成 N-[(2S,3R,4R,5S,6R)-5-fluoro-2-phenylmethoxy-6-(phenylmethoxymethyl)-4-[(2S,3R,4R,5R,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxyoxan-3-yl]acetamide