5-Thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid, 7-((5-carboxy-5-hydroxy-1-oxopentyl)amino)-3-(hydroxymethyl)-8-oxo-, (6R-(6alpha,7beta))- 7-Hchcc 7beta-(5-Hydroxy-5-carboxyvarelamido)-3-hydroxymethyl-3-cephem-4-carboxylic acid 85416-37-1