(2S)-N-{(1S,3S,4S)-3-Hydroxy-5-phenyl-1-benzyl-4-[(1,3-thiazol-5-ylmethoxy)carbonylamino]pentyl}-3-methyl-2-(2-oxo(1,3-diazaperhydroinyl))butanamide A-155564 AIDS-008559 AIDS008559