33962-34-4 5'-Azido-5'-deoxy-4'-fluoro-2',3'-O-isopropylideneadenosine AIDS-003000 AIDS003000 Adenosine, 5'-azido-5'-deoxy-4'-C-fluoro-2',3'-O-(1-methylethylidene)- Nucleocidin, 2',3'-i-Pr analog