2-Amino-3-methyl-butyric acid, (1S,3R)-1-((S)-2-tert-butylcarbamoyl-4-pyridin-3-ylmethyl-piperazin-1-ylmethyl)-3-((1S,2R)-2-hydroxy-indan-1-ylcarbamoyl)-4-phenyl-butyl ester AIDS-093739 AIDS093739