(4R)-3-{(2S,3S)-2-Hydroxy-3-[(3-hydroxy-2-methylbenzoyl)amino]-4-phenylbutanoyl}-N-[(1S)-1,2,3,4-tetrahydronaphthalen-1-yl]-1-thia-3-azaspiro[4.4]nonane-4-carboxamide AIDS-190508 AIDS190508