Deferoxamine-DBCO is a bifunctional chelating agent. Deferoxamine-DBCO efficiently chelates with radioactive metals (such as 89Zr) through the DFO structure to achieve radiolabeling. Deferoxamine-DBCO undergoes a metal-free Huisgen cycloaddition reaction with azide-containing biomolecules (such as siRNA, monoclonal antibodies) under bioorthogonal conditions through the DBCO structure to achieve targeted coupling. Deferoxamine-DBCO has efficient metal chelating ability and specific bioorthogonal reaction activity. Deferoxamine-DBCO can be used for targeted radioactive imaging studies of tumors[1][2][3].