4NH3OH-5PhBuCOOH, 2NH-PHCH2 AIDS-032497 AIDS032497 [(1S,2S,3R)-3-{(S)-1-[(1H-Benzoimidazol-2-ylmethyl)-carbamoyl]-2-methyl-propylcarbamoyl}-1-benzyl-2-hydroxy-3-(4-methoxy-benzylamino)-propyl]-carbamic acid tert-butyl ester