Synonyms: (6R-(6alpha,7beta(R*)))-3-(acetoxymethyl)-7-((5-amino-5-carboxypentanoyl)amino)-8-oxo-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, zinc salt;5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 3-((acetyloxy)methyl)-7-((5-amino-5-carboxy-1-oxopentyl)amino)-8-oxo-, zinc salt, (6R-(6alpha,7beta(R*)))-;zinc (6R,7R)-3-[(acetyloxy)methyl]-7-[(5-amino-5-carboxylatopentanoyl)amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate