1-amino-4-thiopyridone 、 diphenylmethyl (6R,7S)-7-amino-3-bromomethyl-7-formamidoceph-3-em-4-carboxylate 、
(R)-2-<(4-ethyl-2,3-dioxopiperazin-1-yl)carbonylamino>-2-<3,4-bis(trimethylsilyloxy)phenyl>acetyl chloride 在
吡啶 、
三氟乙酸 、 sodium iodide 作用下,
生成 (6R,7R)-3-[(1-aminopyridin-1-ium-4-yl)sulfanylmethyl]-7-[[(2R)-2-(3,4-dihydroxyphenyl)-2-[(4-ethyl-2,3-dioxopiperazine-1-carbonyl)amino]acetyl]amino]-7-formamido-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate