(4R)-N-(4-Amino-4-oxobutyl)-3-[(2S,3S)-2-hydroxy-3-({3-(methylsulfonyl)-N-[(1-naphthyloxy)acetyl]-L-alanyl}amino)-4-phenylbutanoyl]-1,3-thiazolidine-4-carboxamide 1Nap-O-CH2CO-Msa-(2S,3S)-AHPBA-Thz-GABA-NH2 AIDS-163748 AIDS163748