7 .alpha.-formamido cephalosporin derivatives having a 3[N-(optionally substituted)aminothiopyridinium thiomethyl] substituent have anti-bacterial activity and are of use in anti-bacterial therapy. Processes for the preparation thereof and intermediates for use in these processes are also disclosed.
7-α-甲酰
氨基
头孢菌素衍
生物具有3-[N-(可选择取代)
氨基
硫代
吡啶硫甲基]取代基,具有抗菌活性,并可用于抗菌疗法。还公开了用于制备这些化合物的方法和用于这些方法的中间体。