[EN] NOVEL CEPHALOSPORIN DERIVATIVES, ITS PHARMACEUTICALLY ACCEPTABLE SALTS AND MANUFACTURING PROCESS THEREOF [FR] NOUVEAUX DERIVES DE CEPHALOSPORINE, SELS PHARMACEUTIQUEMENT ACCEPTABLES DE CES DERIVES ET PROCEDE PERMETTANT LEUR PREPARATION
[EN] NOVEL CEPHALOSPORIN DERIVATIVES, ITS PHARMACEUTICALLY ACCEPTABLE SALTS AND MANUFACTURING PROCESS THEREOF [FR] NOUVEAUX DERIVES DE CEPHALOSPORINE, SELS PHARMACEUTIQUEMENT ACCEPTABLES DE CES DERIVES ET PROCEDE PERMETTANT LEUR PREPARATION