Sodium 7-[2-(2-imino-4-thiazolin-4-yl)-2-hydroxyimino-acetamido]-3-(1-methyltetrazol-5-yl)thiomethyl-3-cephem-4-carboxylate 、
特戊酸碘甲酯 以
N-甲基乙酰胺 、
乙醚 、
乙酸乙酯 为溶剂,
生成 pivaloyloxymethyl 7-[2-(2-imino-4-thiazolin-4-yl)-2-hydroxyimino-acetamido]-3-(1-methyl-1H-tetrazol-5-yl)thiomethyl-3-cephem-4-carboxylate