1-(2-Amino-4-oxo-1(4H)-pyrimidinyl)-1-deoxy-beta-D-ribofuranose 2-Amino-1-beta-D-ribofuranosyl-4(1H)-pyrimidinone 4(1H)-Pyrimidinone, 2-amino-1-beta-D-ribofuranosyl- 489-59-8 Isocytidine