1-Azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 7-amino-3-chloro-8-oxo-, (6R-trans)- 3-Chloro-1-carbacephem 7-Amino-3-chloro-8-oxo-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid (6R-trans)- 76497-76-2