4-?(Phenylmethoxy)?-?1-?β-?D-?ribofuranosyl-2(1H)?-?pyridinone 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.