Skip to main content

Government Funding Lapse
Because of a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted.

The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit cc.nih.gov.

Updates regarding government operating status and resumption of normal operations can be found at opm.gov.

Cyclopentenyl Cytosine

A pro-drug carbocyclic analogue of cytidine with antineoplastic and antiviral activities. Cyclopentenyl cytosine (CPEC) is converted to the active metabolite cyclopentenyl cytosine 5'-triphosphate (CPEC-TP); CPEC-TP competitively inhibits cytidine triphosphate (CTP) synthase, thereby depleting intracellular cytidine pools and inhibiting DNA and RNA synthesis. This agent may also induce differentiation of some tumor cell types. The antiviral activity of this agent is broad-spectrum.

Check for active clinical trials using this agent View this agent in the NCI Thesaurus

Synonym:	cyclopentenylcytosine cyclopentenylcytosine triphosphate
Abbreviation:	CPE-C

Cyclopentenyl Cytosine

Search NCI's Drug Dictionary