1-ethoxycarbonyloxyethyl (2S,5R,6R)-6-[[(2R)-2-amino-2-phenylacetyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate 1-ethoxycarbonyloxyethyl (2S,5R,6R)-6-[[(2R)-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-[[(2R)-2-amino-1-oxo-2-phenylethyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 1-ethoxycarbonyloxyethyl ester (2S,5R,6R)-6-[[(2R)-2-amino-2-phenyl-acetyl]amino]-7-keto-3,3-dimethyl-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylic acid 1-carbethoxyoxyethyl ester 1-ethoxycarbonyloxyethyl (2S,5R,6R)-6-[[(2R)-2-amino-2-phenyl-ethanoyl]amino]-3,3-dimethyl-7-oxo-4-thia-1-azabicyclo[3.2.0]heptane-2-carboxylate SPBio_002311 BSPBio_000372 Prestwick3_000416 Prestwick0_000416 Prestwick1_000416 Prestwick2_000416 Bacampicillin C08122 BPBio1_000410