拉氧头孢钠中间体 2 、
α-diphenylmethoxycarbonyl-α-p-hydroxyphenyl-acetic acid 生成 benzhydryl (6R,7R)-7-[[(2S)-3-benzhydryloxy-2-(4-hydroxyphenyl)-3-oxopropanoyl]amino]-7-methoxy-3-[(1-methyltetrazol-5-yl)sulfanylmethyl]-8-oxo-5-oxa-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate