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


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