18F-L-Dopa precursor

18F-L-Dopa precursor (Compound 5a) is the precursor of 18F-L-Dopa. 18F-L-Dopa precursor serves as a core basis for radioactive labeling precursors, allowing the introduction of non-metallic radioactive elements through radiolabeling reactions. 18F-L-Dopa precursor can be used for the study of RDN surgery for refractory hypertension, chronic kidney disorder.