.beta.-L-2',3'-Dideoxy-5-fluorocytidine .beta.-L-5-FddC .beta.-L-FddC 147058-39-7 2(1H)-Pyrimidinone, 4-amino-5-fluoro-1-[(2S,5R)-tetrahydro-5-(hydroxymethyl)-2-furanyl]- 5-F-b.-L-ddC AIDS-005857 AIDS005857 L-FddC