(6R)-3-acetoxymethyl-7t-((R)-5-amino-5-carboxy-pentanoylamino)-7c-methoxy-8-oxo-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 、
吡啶 生成 7-[(5-amino-5-carboxypentanoyl)amino]-7-methoxy-8-oxo-3-(pyridin-1-ium-1-ylmethyl)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid;acetate