(3R,3aS,6aR or 3S,3aR,6aS)-Hexahydrofuro [2,3-b] furan-3-yl-N-((1S,2R)-1-benzyl-3-5-[(ethoxycarbonyl) amino]-2,2-dimethylpentyl [(4-methoxyphenyl) sulfonyl] amino-2-hydroxypropyl) carbamate AIDS-095490 AIDS095490