1Nap-O-CH2CO-Mtv-(2S,3S)-AHPBA-Thz-NH-tBu AIDS-163731 AIDS163731 N~1~-((1S,2S)-1-Benzyl-3-{(4R)-4-[(tert-butylamino)carbonyl]-1,3-thiazolidin-3-yl}-2-hydroxy-3-oxopropyl)-3-(methylthio)-N~2~-[(1-naphthyloxy)acetyl]-L-valinamide