8-oxo-7-(2-oxo-2H-chromene-3-carboxamido)-3-((4-(2-oxo-2H-chromene-3-carboxamido)-phenylthio)methyl)-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid
8-oxo-7-(2-oxo-2h-chromene-3-carboxamido)-3-((4-(2-oxo-2h-chromene-3-carboxamido)-phenylthio)methyl)-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid