AIDS-153854 AIDS153854 [(1S,2R)-1-Benzyl-2-hydroxy-3-(2-oxo-16-phenyl-1-oxa-3-aza-cyclohexadec-3-yl)-propyl]-carbamic acid, (3R,3aS,6aR)-(hexahydro-furo[2,3-b]furan-3-yl) ester