3-((4-nitrophenoxy)methyl)-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid 5,5-dioxide
3-((4-nitrophenoxy)methyl)-8-oxo-7-(2-phenylacetamido)-5-thia-1-azabicyclo(4.2.0)oct-2-ene-2-carboxylic acid 5,5-dioxide