(6R,7R)-3-(acetoxymethyl)-7-((R)-2-(formyloxy)-2-phenylacetamido)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid
(6R,7R)-3-(acetoxymethyl)-7-((R)-2-(formyloxy)-2-phenylacetamido)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid