(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-11,14-dioxo-4,10,12,15-tetraazahexadec-1-yl-carbamate AIDS-095485 AIDS095485