(3R,3aS,6aR or 3S,3aR,6aS) Hexahydrofuro[2,3-b]furan-3-yl-N-((1S,2R)-1-benzyl-2-hydroxy-3-4-[(methoxycarbonyl) amino]-2,2-dimethylbutyl[(4-methoxyphenyl) sulfonyl] aminopropyl) carbamate AIDS-095478 AIDS095478