(3RS,3aSR,6aRS)-hexahydrofuro[2,3-b]furan-3-yl (1S,2R)-3-{{[2-(acetylamino)-1,3-benzothiazol-6-yl]sulfonyl}[2-(2-pyridinylamino)ethyl]amino}-1-benzyl-2-hydroxypropylcarbamate AIDS-181362 AIDS181362