A novel cephem compound of the formula:
wherein R1 is a phosphono group or a group convertible to a phosphono group; R2 is a hydrogen atom or a group having a linkage through a carbon atom; each of Q and X is a nitrogen atom or CH; Y is S, O or CH2; n is 0 or 1; one of R3 and R4 is a pyridinium group which may be substituted and the other is a hydrogen atom or hydrocarbon group which may be substituted, or R3 and R4 taken together may form a quaternalized nitrogen-containing heterocyclic ring which may be substituted, or its ester or its salt, which has a superior anti-bacterial activity, stability, absorbability, etc., a production thereof and a pharmaceutical composition containing it, is provided.
一种新式
头孢菌素化合物,其式如下
其中 R1 是膦酰基或可转化为膦酰基的基团;R2 是氢原子或通过碳原子连接的基团;Q 和 X 各为氮原子或 CH;Y 是 S、O 或
CH2;n 是 0 或 1;R3 和 R4 中的一个是可被取代的
吡啶基,另一个是氢原子或可被取代的烃基,或 R3 和 R4 合在一起可形成一个可被取代的雌化含氮杂环,或其酯或其盐,具有优异的抗菌活性、稳定性、可吸收性等。,提供了其生产方法和含有它的药物组合物。