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(6R,7R)-7-[2-[(1R)-3-[2-[4-[Acetyl(chloro)amino]benzoyl]-4-chlorophenoxy]-1-carboxy-2-oxo-1-phenylpropyl]hydrazinyl]-3-(acetyloxymethyl)-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid


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