An antibacterial 3-(alkylcarbamoyloxymethyl)-3-cephem-4-carboxylic acid or its derivatives represented by the following formula ##STR1## (wherein R is hydrogen or an amino-protecting group, R.sup.1 and R.sup.2 each is the same or different 1C to 8C alkyl, R.sup.3 is hydrogen, a salt or ester forming atom or group, and X is sulfur or sulfinyl), a pharmaceutical composition containing the same, a method for treating a bacterial infection with the same, and a method for preparing the same are disclosed.
本发明公开了一种抗菌性3-(烷基
氨甲酰氧甲基)-3-头孢烯-4-
羧酸或其衍
生物,其
化学式如下:##STR1##(其中R为氢或
氨基保护基,R.sup.1和R.sup.2各自为相同或不同的1C至8C烷基,R.sup.3为氢、盐或酯形成原子或基团,X为
硫或亚砜),以及含有该化合物的制药组合物、使用该化合物治疗细菌感染的方法和制备该化合物的方法。