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Tert-butyl N-[N-[(2R,4S)-3-acetamido-2-[2-aminoethoxy-[(4R)-2-oxo-1,3-dioxolan-4-yl]methyl]-6-butanoyl-3,4-dihydro-2H-pyran-4-yl]-C-ethenylcarbonimidoyl]carbamate


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