(6R,7R)-7-Amino-3-chloro-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic Acid; 3-Chloro-7-amino-3-cephem-4-carboxylic Acid; (6R-trans)-7-amino-3-chloro-8-oxo-5-Thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid;7-Amino-3-chlorocephalosporanic Acid;

7-Amino-3-chloro-3-cephem-4-carboxylic acid is used as an intermediate in the preparation of semi-synthetic cephalosprin antibiotics.