AIDS-153840 AIDS153840 {(2R,3S)-3-[(3R,3aS,6aR)-(Hexahydro-furo[2,3-b]furan-3-yl)oxycarbonylamino]-2-hydroxy-4-phenyl-butyl}-hex-5-enyl-carbamic acid ,1-cyclohexyl-non-8-enyl ester