4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 3,3-dimethyl-7-oxo-6-(((((2-oxo-1-imidazolidinyl)carbonyl)amino)phenylacetyl)amino)-, (2S-(2alpha,5alpha,6beta(S*)))-
(2S,5R,6R)-3,3-dimethyl-7-oxo-6-{[(2R)-2-{[(2-oxoimidazolidin-1-yl)carbonyl]amino}-2-phenylacetyl]amino}-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid