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Tert-butyl 3-[[(12S,15S,18S)-7-bromo-4-chloro-15-[4-[2,2-difluoroethyl-[(2-methylpropan-2-yl)oxycarbonyl]amino]butyl]-13-methyl-18-[3-[(2-methylpropan-2-yl)oxycarbonylamino]propyl]-11,14,17-trioxo-2-thia-4,10,13,16,19-pentazatricyclo[19.4.0.03,8]pentacosa


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