(3R,3aS,6aR or 3S,3aR,6aS) Hexahydrofuro[2,3-b] furan-3-yl N-((1S,2R)-3-(5-amino-2,2-dimethylpentyl) [(4-methoxyphenyl) sulfonyl] amino-1-benzyl-2-hydroxypropyl) carbamate AIDS-095472 AIDS095472