4-Thia-1-azabicyclo(3.2.0)heptane-2-carboxylic acid, 6-((carboxyphenylacetyl)amino)-3,3-dimethyl-7-oxo-, (2S-(2alpha,5alpha,6beta))-
N-(2-carboxy-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo(3.2.0)hept-6-yl)-2-phenylmalonamic acid