(2R)-N-((1S,2R)-3-{2(S)-[N-(tert-Butyl)carbamoyl]-4-benzylpiperazinyl}-2-hydroxy-1-benzylpropyl)-3-methyl-2-{[N-methyl-N-(1,3-thiazol-5-ylmethyl)carbamoyl]amino}butanamide AIDS-071419 AIDS071419