2-tert-Butoxycarbonylamino-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-093736 AIDS093736