2'-DEOXY-2'-FLUORO-5-IODOCYTIDINE, also called AC1NQP33, SCHEMBL138935, under the IUPAC name 4-amino-1-[(2R,3R,4R,5R)-3-fluoro-4-hydroxy-5-(hydroxymethyl)oxolan-2-yl]-5-iodopyrimidin-2-one; 80791-93-1, is a potent anti-hepatitis C virus (HCV) agent.Several 2'-deoxy-2'-halogenoarabinofuranosylcytosines and -uracils substituted at C-5 of the aglycon with Br or I were prepd. and evaluated for antiherpetic activity against both herpes virus type 1 and 2 on monolayers of Vero cells by the plaque redn.