7-(((2R)-AMINOPHENYLACETYL)AMINO)-3-CHLORO-8-OXO-5-THIA-1-AZABICYCLO(4.2.0)OCT-3-ENE-2-CARBOXYLIC ACID, (6R,7R)-
7-(((2r)-aminophenylacetyl)amino)-3-chloro-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-3-ene-2-carboxylic acid, (6r,7r)-