title: [New beta-lactam antibiotics. Cephem derivatives with electron withdrawing substituents at position 3 (author's transl)].
mesh_terms: D002264:Carboxylic Acids; D002511:Cephalosporins / Q000138:chemical synthesis*; D008722:Methods; D010084:Oxidation-Reduction
chemical_list: D002264:Carboxylic Acids; D002511:Cephalosporins
vernacular_title: Neue beta-Lactam-Antibiotika. Cephem-Derivate mit elektronen-anziehenden Substituenten in 3-Stellung