Used primarily in the field of radiopharmaceuticals, it serves as a versatile linker for attaching targeting molecules to radionuclides. Its structure allows for stable conjugation with peptides, antibodies, or other biomolecules, enabling precise delivery of radioactive isotopes for diagnostic imaging or targeted cancer therapy. The PEG5 spacer enhances solubility and reduces steric hindrance, improving the efficiency of the conjugate. Additionally, the DOTA chelator ensures strong binding to metals like gadolinium or lutetium, making it valuable in both MRI contrast agents and radionuclide therapy. Its applications are critical in advancing personalized medicine and improving the accuracy of medical imaging and treatment.