吡啶 、
3-[(Ξ)-((6R)-3-acetoxymethyl-2-carboxy-8-oxo-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-en-7t-ylcarbamoyl)-sulfo-methyl]-1-methyl-pyridinium betaine 在
potassium iodide 作用下,
生成 3-[(Ξ)-((6
R)-2-carboxy-8-oxo-3-pyridinium-1-ylmethyl-(6
rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-en-7
t-ylcarbamoyl)-sulfo-methyl]-1-methyl-pyridinium dibetaine