According to the NCI website, Tipifarnib is a nonpeptidomimetic quinolinone with potential antineoplastic activity. heck for active clinical trials using this agent. (NCI Thesaurus)

More Information in English:

Link to Drug Information Portal, a service of the U.S. National Library of Medicine, National Institutes of Health
Link to National Cancer Institute

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Link to European Medicines Agency (EMEA)