4-amino-1-(5-O-(2-oxo-4-(4-pyridyl)-1,3,2-dioxaphosphorinan-2-yl)-beta-D-arabinofuranosyl)-2(1H)-pyrimidinone
4-amino-1-(5-o-(2-oxo-4-(4-pyridyl)-1,3,2-dioxaphosphorinan-2-yl)-beta-d-arabinofuranosyl)-2(1h)-pyrimidinone