- Potentiation of 5-fluoro-2'-deoxyuridine antineoplastic activity by the uridine phosphorylase inhibitors benzylacyclouridine and benzyloxybenzylacyclouridine. Chu, M.Y., Naguib, F.N., Iltzsch, M.H., el Kouni, M.H., Chu, S.H., Cha, S., Calabresi, P. Cancer Res. (1984)