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(6S,7S)-7-[[2-Amino-2-(4-hydroxyphenyl)acetyl]amino]-3-[[chloro-(2,2-dichloroacetyl)carbamoyl]oxymethyl]-7-methoxy-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid;2,2,2-trifluoroacetic acid


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