(S)-4-Ethoxy-1-((2S,3S)-2-hydroxy-3-{(R)-3-methanesulfonyl-2-[2-(naphthalen-1-yloxy)-ethanoylamino]-propanoylamino}-4-phenyl-butanoyl)-pyrrolidine-2-carboxylic acid tert-butylamide 1Nap-O-CH2CO-Msa-(2S,3S)-AHPBA-Hyp(Et)-NH-tBu AIDS-163729 AIDS163729