COMPOSTI DELL ACIDO 3ALCHILCARBAMOILOSSIMETIL 3 CEFEM 4 CARBOSSILICO PROCEDIMENTO PER LA PREPARAZIONE DI TALI COMPOSTI E PREPARATO ANTIBATTERICO CHE LI CONTIENE

摘要

An antibacterial 3-(alkylcarbamoyloxymethyl)-3-cephem-4-carboxylic acid or its derivatives represented by the following formula (wherein R is hydrogen or an amino-protecting group, R1 and R2 each is the same or different 1C to 8C alkyl, R3 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.