申请人:Eisai Co., Ltd.
公开号:US04285939A1
公开(公告)日:1981-08-25
New cephalosporin derivatives represented by the general formula: ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 each represents hydroxy, acyloxy, and hydrogen provided that two or three of R.sub.1, R.sub.2, and R.sub.3 are not hydrogen at the same time, and their salts, and processes for the preparation thereof. The cephalosporin derivatives of the present invention are useful as antibacterial drugs.
新的头孢菌素衍生物,其通式为:##STR1## 其中R.sub.1,R.sub.2和R.sub.3分别表示羟基,酰氧基和氢,前提是R.sub.1,R.sub.2和R.sub.3中的两个或三个不同时为氢,以及它们的盐,以及制备它们的过程。本发明的头孢菌素衍生物可用作抗菌药物。