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Methyl (2R,3R,4S)-3-acetamido-4-azido-2-[(S)-2-[4-[(2-methylpropan-2-yl)oxycarbonylamino]butylamino]ethylcarbamoyloxy-[(4R)-2-oxo-1,3-dioxolan-4-yl]methyl]-3,4-dihydro-2H-pyran-6-carboxylate


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