[(1R)-3-oxo-1H-2-benzofuran-1-yl] (2S,5R,6R)-6-[[(2S)-2-amino-2-phenylacetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate [(1R)-3-oxo-1H-isobenzofuran-1-yl] (2S,5R,6R)-6-[[(2S)-2-amino-2-phenyl-acetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate (2S,5R,6R)-6-[[(2S)-2-amino-1-oxo-2-phenylethyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid [(1R)-3-oxo-1H-isobenzofuran-1-yl] ester (2S,5R,6R)-6-[[(2S)-2-amino-2-phenyl-acetyl]amino]-7-keto-3,3-dimethyl-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid [(1R)-3-keto-1H-isobenzofuran-1-yl] ester [(1R)-3-oxo-1H-2-benzofuran-1-yl] (2S,5R,6R)-6-[[(2S)-2-amino-2-phenyl-ethanoyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate NCGC00016845-01 CAS-39878-70-1