4NH3OH-5PhBuCOOH, 2NH-PHCH2 AIDS-032576 AIDS032576 [(1S,2S,3R)-1-Benzyl-3-(4-ethoxy-benzylamino)-2-hydroxy-3-((R)-2-hydroxy-indan-1-ylcarbamoyl)-propyl]-carbamic acid tert-butyl ester