(R)-3-((2S,3S)-2-Hydroxy-3-{(2S,3R)-3-methyl-2-[2-(naphthalen-1-yloxy)-ethanoylamino]-pentanoylamino}-4-phenyl-butanoyl)-thiazolidine-4-carboxylic acid tert-butylamide 1Nap-O-CH2CO-Ile-(2S,3S)-AHPBA-Thz-NH-tBu AIDS-163738 AIDS163738