Hoechst Aktiengesellschaft

Friedhelm Adam

Walter Durckheimer

Dieter Isert

Gerhard Seibert

Gerd Fischer

Burkhard Mencke

Jurgen Blumbach

Karl-Heinz Scheunemann

Norbert Klesel

Burghard Mencke

Crystalline cephem acid addition salts of the general formula II ##STR1## pharmaceutical preparations effective against bacterial infections which contain such cephem derivatives, processes for the preparation of the cephem derivatives and the pharmaceutical preparations, and the use of the cephem derivatives for combating bacterial infections.

Crystalline cephem acid addition salts and process for their preparation

Cephalosporin derivatives of the general formula ##STR1## pharmaceutical preparations which are active against bacterial infections and contain such cephem derivatives, processes for the preparation of the cephem derivatives and the pharmaceutical preparations and the use of the cephem derivatives for combating bacterial infections.

Cephalosporin derivatives

Cephemcarboxylic acid esters of the general formula ##STR1## pharmaceutical preparations which are active against bacterial infections, which contain such cephem derivatives, a process for the preparation of the cephem derivatives and the pharmaceutical preparations, and also the use of the cephem derivatives for combating bacterial infections.

Cephalosporin derivatives of the general formula ##STR1## pharmaceutical preparations active against bacterial infections which contain such cephalosporin derivatives, processes for the preparation of the cephalosporin derivatives, use of the cephalosporin derivatives for the preparation of a pharmaceutical for combating bacterial infections, and starting products for the preparation of cephalosporin derivatives.

Growing community of inventors

Hofheim am Taunus, Germany

Friedhelm Adam