127841-00-3 (HYDROCHLORIDE) 128496-20-8 2',3'-Difluoro-2',3'-dideoxycytidine 2',3'-diF-arabino-ddC 2(1H)-Pyrimidinone, 4-amino-1-(2,3-dideoxy-2,3-difluoro-.beta.-D-arabinofuranosyl)- AIDS-001171 AIDS001171