(3R,3aS,6aR or 3S,3aR,6aS) Hexahydrofuro [2,3-b] furan-3-yl N-((1S,2R)-1-benzyl-2-hydroxy-3-5-[(methoxycarbonyl) amino]-2,2-dimethylpentyl[(4-methoxyphenyl) sulfonyl] aminopropyl) carbamate AIDS-095473 AIDS095473