(3R,3aS,6aR or 3S,3aR,6aS)-Hexahydrofuro [2,3-b] furan-3-yl-N-(1S,2R)-1-benzyl-2-hydroxy-4-[(4-methoxyphenyl) sulfonyl]-6,6-dimethyl-10.13-dioxo-4,9,11,14-tetraazapentadec-1-ylcarbamate AIDS-095488 AIDS095488