(2S,4S)-4-Chloro-1-((2S,3S)-4-(3,5-difluoro-phenyl)-2-hydroxy-3-{[1-(3-hydroxy-2,5-dimethyl-phenyl)-methanoyl]-amino}-butanoyl)-pyrrolidine-2-carboxylic acid tert-butylamide AIDS-085538 AIDS085538