Synonyms: Cytosine riboside;1-.beta.-D-Ribofuranosylcytosine;4-Amino-1.beta.-D-ribofuranosyl-2(1H)-pyrimidinone;beta-D-Ribofuranoside, cytosine-1;2(1H)-Pyrimidinone, 4-amino-1-beta-D-ribofuranosyl-;Cytosine, 1-beta-D-ribofuranosyl-;2(1H)-Pyrimidinone, 4-amino-1-.beta.-D-ribofuranosyl-;1.beta.-Ribofuranosylcytosine;1-beta-D-ribosyl- (6CI);1beta-2-Ribofuranosylcytosine, d-;4-Amino-1-beta-D-ribofuranosyl-2(1H)-pyrimidinone;cytosine-1;CP-C;1-(beta-D-Ribofuranosyl)-2-oxo-4-amino-1,2-dihydro-1,3-diazine;Cytidine(CR);Cytosine nucleoside(Cytidine);