benzyl (4R)-5-amino-4-[[(2S)-2-amino-6-(phenylmethoxycarbonylamino)hexanoyl]amino]-5-oxopentanoate 、
benzyl N-acetyl-4,6-O-benzylidene muramic acid 生成 benzyl (4R)-4-[[(2S)-2-[[(2R)-2-[[(4aR,7R,8R,8aS)-7-acetamido-6-hydroxy-2-phenyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-8-yl]oxy]propanoyl]amino]-6-(phenylmethoxycarbonylamino)hexanoyl]amino]-5-amino-5-oxopentanoate