NCI Drug Dictionary

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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.

A folate analog antimetabolite with antineoplastic activity. As the 6R diastereomer of 5,10-dideazatetrahydrofolate, lometrexol inhibits glycinamide ribonucleotide formyltransferase (GARFT), the enzyme that catalyzes the first step in the de novo purine biosynthetic pathway, thereby inhibiting DNA synthesis, arresting cells in the S phase of the cell cycle, and inhibiting tumor cell proliferation. The agent has been shown to be active against tumors that are resistant to the folate antagonist methotrexate. Check for active clinical trials using this agent. (NCI Thesaurus)
Chemical structures:6R-5,10-Dideazatetrahydrofolate
L-Glutamic acid, N-(4-(2-((6R)-2-amino-1,4,5,6,7,8-hexahydro-4-oxopyrido(2,3-d)pyrimidin-6-yl)ethyl)benzoyl)-
L-Glutamic acid, N-(4-(2-(2-amino-1,4,5,6,7,8-hexahydro-4-oxopyrido(2,3-d)pyrimidin-6-yl)ethyl)benzoyl)-, (R)-
Pyrido[2,3-d]pyrimidine, L-glutamic acid derivative (9CI)