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  • (2S,5R,6R)-6-{2-[2-(2-Benzyloxycarbonylamino-ethoxy)-ethoxy]-ethanesulfonylamino}-3,3-dimethyl-7-oxo-4-thia-1-aza-bicyclo[3.2.0]heptane-2-carboxylic acid methoxymethyl ester

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