(R)-3-((2S,3S)-2-Hydroxy-3-{(S)-2-[2-(naphthalen-1-yloxy)-ethanoylamino]-2-phenyl-ethanoylamino}-4-phenyl-butanoyl)-thiazolidine-4-carboxylic acid tert-butylamide 1Nap-O-CH2CO-Phg-(2S,3S)-AHPBA-Thz-NH-tBu AIDS-163737 AIDS163737