AIDS-171131 AIDS171131 Benzoic acid, 4-[2-[[(2S)-2-[[[(2S,4S)-1-(3-cyclopentyl-1,2-dioxopropyl)-4-phenyl-2-pyrrolidinyl]carbonyl]amino]-4,4-difluoro-1-oxobutyl]amino]ethyl]-3,5-difluoro-