NCI Drug Dictionary

The NCI Drug Dictionary contains technical definitions and synonyms for drugs/agents used to treat patients with cancer or conditions related to cancer. Each drug entry includes links to check for clinical trials listed in NCI's List of Cancer Clinical Trials.

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ropidoxuridine
An orally available 5-substituted 2-pyrimidinone-2'-deoxyribonucleoside analogue and prodrug of 5-iododeoxyuridine (IUdR), an iodinated analogue of deoxyuridine, with radiosensitizing activity. Upon oral administration, ropidoxuridine (IPdR) is efficiently converted to idoxuridine (IUdR) by a hepatic aldehyde oxidase. In turn, IUdR is incorporated into DNA during replication, thereby sensitizing cells to ionizing radiation by increasing DNA strand breaks. Compared to IUdR, ropidoxuridine is associated with a lower toxicity profile and improved anti-tumor activity. Check for active clinical trials using this agent. (NCI Thesaurus)

Synonym:IPdR
Chemical structure:
  • 2(1H)-pyrimidinone, 1-(2-deoxy-beta-D-erythro-pentofuranosyl)-5-iodo-
  • 5-iodo-2-pyrimidinone 2' deoxyribonucleoside
  • 5-iodo-2-pyrimidinone-2'-deoxyribose