2-tert-Butoxycarbonylamino-3-methyl-butyric acid, (1S,2R)-1-[(2R,4S)-2-benzyl-4-(2-tert-butoxycarbonylamino-3-methyl-butanoyloxy)-5-((S)-2-tert-butylcarbamoyl-4-pyridin-3-ylmethyl-piperazin-1-yl)-pentanoylamino]-indan-2-yl ester AIDS-093738 AIDS093738 INDINAVIR-VAL(8)(4TFA)