(4-nitrophenyl)methyl (5R)-3-ethylsulfinyl-6-(1-hydroxyethyl)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylate 、
N,N-Dimethyl-α-mercaptoacetamidin 生成 (5R)-3-[2-(dimethylamino)-2-iminoethyl]sulfanyl-6-(1-hydroxyethyl)-7-oxo-4-thia-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic acid