2-(氰基甲硫基)乙酸 、
(6R)-7t-amino-8-oxo-3-(1H-[1,2,4]triazol-3-ylsulfanylmethyl)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid 生成 (6R)-7t-(2-cyanomethylsulfanyl-acetylamino)-8-oxo-3-(1H-[1,2,4]triazol-3-ylsulfanylmethyl)-(6rH)-5-thia-1-aza-bicyclo[4.2.0]oct-2-ene-2-carboxylic acid