method for the preparation of derivatives of 7 - amino - 4 - 3 - cefem carboxylic acid, its salts - led approach, method for the preparation of pharmaceutical preparations, and gevorm the preparations.

摘要

The invention relates to 7 beta -[D-2-amino-2-(lower alkylsulphonylamino-phenyl)-acetylamino]-3-R-cephem-4-carboxylic acid, in which R denotes lower alkoxy or halogen with an atomic number of up to 35, and their salts, which compounds possess antibiotic properties.