1-(2,3-Dideoxy-2,3-difluoro-beta-D-arabinofuranosyl)cytosine 1-(2,3-Dideoxy-2,3-difluoroarabinofuranosyl)cytosine 1-Ddfac 128496-20-8 2(1H)-Pyrimidinone, 4-amino-1-(2,3-dideoxy-2,3-difluoro-beta-D-arabinofuranosyl)- 4-Amino-1-(2,3-dideoxy-2,3-difluoro-beta-D-arabinofuranosyl)-2(1H)-pyrimidinone