6-amino-5-fluoro-1H-pyrimidin-2-one; 5-Fluoro Cytosine; 4-Amino-5-fluoro-2(1H)-pyrimidine; Flucytosine, 5-FC; NSC 103805 6-Amino-5-fluoro-2(1H)-pyrimidinone; Cytosine, 5-fluoro-; 5-Fluorocytosine (USP)