(4R)-N-[(4S)-3,4-Dihydro-2H-chromen-4-yl]-3-((2S,3S)-2-hydroxy-4-phenyl-3-{[(1H-1,2,4-triazol-3-ylthio)acetyl]amino}butanoyl)-5,5-dimethyl-1,3-thiazolidine-4-carboxamide AIDS-190420 AIDS190420