(R)-2-hydroxy-N-((6R,7R)-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-7-yl)-2-phenylacetamide
(R)-2-hydroxy-N-((6R,7R)-3-(((1-methyl-1H-tetrazol-5-yl)thio)methyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-en-7-yl)-2-phenylacetamide