Up to now, the synthesis methods reported was mainly used the 3-GCLH and 7-ACA, or 7-ACA protecting the amido and carboxyl as the raw material.

• 迄今为止合成的方法,文献报道的主要是以3-氯代甲基头孢菌素(GCLH) 和以7-ACA，或将氨基和羧基保护的7-ACA为起始原料。