(R)-3-[(2S,3S)-2-Hydroxy-3-((R)-3-methanesulfonyl-2-{2-[3-(1-piperidin-1-yl-methanoyl)-phenoxy]-ethanoylamino}-propanoylamino)-4-phenyl-butanoyl]-thiazolidine-4-carboxylic acid tert-butylamide AIDS-163742 AIDS163742 m-(Piper-CO)-Ph-O-CH2CO-Msa-(2S,3S)-AHPBA-Thz-NH-tBu