: NSC 111071, α-Carboxybenzylpenicillin disodium salt, Sodium (2S,5R,6R)-6-(2-carboxylato-2-phenylacetamido)-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate, 6-[(Carboxyphenylacetyl)-amino]-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic Acid, 2Na