(4R)-N-(tert-Butyl)-3-{(2S,3S)-2-hydroxy-3-[(3-(methylsulfonyl)-N-{[3-(4-morpholinylcarbonyl)phenoxy]acetyl}-L-alanyl)amino]-4-phenylbutanoyl}-1,3-thiazolidine-4-carboxamide AIDS-163743 AIDS163743 m-(Morph-CO)-Ph-O-CH2CO-Msa-(2S,3S)-AHPBA-Thz-NH-tBu