diphenylmethyl (6R-trans)-3-methoxy-8-oxo-7-(phenoxyacetamido)-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylate

(6R,7R)-3-Methoxy-8-oxo-7-[(phenoxyacetyl)amino]-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid diphenylmethyl ester