A folate receptor-targeting radiopharmaceutical consisting of a folate-containing tetrapeptide chelator to which technetium Tc 99m is linked. The folate component of folate receptor-targeted technetium Tc99m-EC20 binds to folic acid receptors, which are frequently upregulated in many types of tumor cells and activated macrophages. An investigational drug in clinical trials for the treatment of breast neoplasms, non small cell lung cancer (NSCLC), and adenocarcinoma of the lung. https://www.bocsci.com/etarfolatide-cas-479578-27-3-item-84-462512.html