Sodium (6R-trans)-3-(Acetoxymethyl)-8-oxo-7-((4-pyridylthio)acetamido)-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylate
5-Thia-1-azabicyclo(4,2,0)oct-2-ene-2-carboxylic acid, 3-(hydroxymethyl)-8-oxo-7-(2-(4-pyridylthio)acetamido)-, Acetate (Ester), Monosodium Salt