(6R)-trans-3-(4-Pyridylthiomethyl)-7-(2,5-dichlorophenyl)thioacetamido-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate 、
N-(p-methoxybenzylcarboxymethyl)-N-[(3-t-butyloxycarbonylamino)-1-propyl]bromoacetamide 以
乙醚 、
N,N-二甲基甲酰胺 为溶剂,
生成 1-[N-(p-methoxybenzylcarboxymethyl)-N-(3-t-butyloxycarbonylamino-1-propyl)carbamoylmethyl]-4-[[(6R)-trans-2-carboxy-8-oxo-7-[(2,5-dichlorophenylthio)acetamido]-5-thia-1-azabicyclo[4.2.0]-oct-2-en-3-yl]methylthio]pyridinium bromide