This invention relates to new 7-substituted-3-cephem-4-carboxylic acids and pharmaceutically acceptable salts thereof, which have antimicrobial activities, and processes for preparation thereof, to intermediates for preparing the same and processes for preparation thereof, and to pharmeceutical compositions comprising the same and methods of using the same prophylactically and therapeutically for treatment of infectious diseases in human beings and animals.
本发明涉及新的7-取代-3-头孢烷-4-
羧酸及其药学上可接受的盐,具有抗微
生物活性,并提供其制备方法,制备中间体的方法,以及包含其的药学组合物和用于预防和治疗人类和动物感染性疾病的方法。