2-Pyrrolidinecarboxamide, N-[(1S)-1-[[[2-[2,6-difluoro-4-(2H-tetrazol-5-yl)phenyl]ethyl]amino]carbonyl]-3,3-difluoropropyl]-1-[(2S)-2-hydroxy-3-methyl-1-oxobutyl]-4-phenyl-, (2S,4S)- AIDS-171141 AIDS171141