(S)-1-((2S,3S)-2-Hydroxy-3-{(R)-3-methanesulfonyl-2-[2-(naphthalen-1-yloxy)-ethanoylamino]-propanoylamino}-4-phenyl-butanoyl)-4-methoxy-pyrrolidine-2-carboxylic acid tert-butylamide 1Nap-O-CH2CO-Msa-(2S,3S)-AHPBA-Hyp(Me)-NH-tBu AIDS-163728 AIDS163728