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  • (S)-2-(2-tert-Butoxycarbonylamino-benzoylamino)-4-{(S)-1-tert-butoxycarbonyl-3-[(S)-1-tert-butoxycarbonyl-2-(4-hydroxy-3-nitro-phenyl)-ethylcarbamoyl]-propylcarbamoyl}-4,4-difluoro-butyric acid tert-butyl ester

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