4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,3,3-dimethyl-6-[[[[[[[3-(methylsulfonyl)-2-oxo-1-imidazolidinyl]carbonyl]amino]carbonyl]amino]phenylacetyl]amino]-7-oxo-, monosodium salt,[2S-[2a,5a,6b(S*)]]-

4-Thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid,3,3-dimethyl-6-[[[[[[[3-(methylsulfonyl)-2-oxo-1-imidazolidinyl]carbonyl]amino]carbonyl]amino]phenylacetyl]amino]-7-oxo-, monosodium salt,[2S-[2a,5a,6b(S*)]]-