(3RS,3aSR,6aRS)-Hexahydrofuro[2,3-b]furan-3-yl (1S,2R)-1-benzyl-2-hydroxy-3-[isobutyl({2-[(4-morpholinylacetyl)amino]-1,3-benzothiazol-6-yl}sulfonyl)amino]propylcarbamate AIDS-181346 AIDS181346