active charcoal 、 2-(4-oxo-6-chloromethyl-4H-pyran-3-yloxy)acetic acid 、
2-(4-oxo-6-chloromethyl-4H-pyran-3-yloxy) acetyl chloride 、
N,N-二(三甲基硅基)乙酰胺 生成 7-{D-2-[2-(4-oxo-6-chloromethyl-4H-pyran-3-yloxy)acetamido]-2-phenylacetamido}-3-(1-methyl-1H-tetrazol-5-ylthiomethyl)-3-cephem-4-carboxylic acid