(3R,3aS,6aR)-Hexahydrofuro [2,3-b] furan-3-yl N-((1S,2R)-1-benzyl-3-(2,2-dimethyl-4-N'-methylcarbamoyloxybutyl)[(4-methoxyphenyl) sulfonyl] amino-2-hydroxypropyl) carbamate AIDS-095481 AIDS095481