42057-22-7

(2S,5R,6R)-3,3-dimethyl-6-[[(2R)-2-[[[3-(methylsulfonyl)-2-oxo-1-imidazolidinyl]carbonyl]amino]-2-phenylacetyl]amino]-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid sodium salt