AIDS-153843 AIDS153843 [(1S,2R)-1-Benzyl-2-hydroxy-3-((Z)-2-oxo-1-oxa-3-aza-cyclotetradec-5-en-3-yl)-propyl]-carbamic acid, (3R,3aS,6aR)-(hexahydro-furo[2,3-b]furan-3-yl) ester