((2R,3S,4R,5R)-5-(4-(Benzyloxy)-2-oxopyridin-1(2H)-yl)-3,4-dihydroxytetrahydrofuran-2-yl)methyl Dihydrogen Phosphate is an intermediate in the synthesis of 3-Deazauridine-5′-triphosphate Triethylamine Salt (D203245), which is the active metabolite of the anticancer drug 3-Deazauridine (D203240) and can suppress cytidine triphosphate synthetase activity in tumor cells.