在活性分子上引入螯合剂的方法近来有许多报道。其中以双功能螯合剂与生理活性化合物的缩合最受注意。理想的双功能螯合剂应具有与生理活性化合物缩合的活性功能基团,又有能与γ辐射金属离子形成稳定螯合物的螯合基团。芳香异硫氰酸酯与氨 Recently, many methods have been reported for introducing chelators into active molecules. One of the most important is the condensation of bifunctional chelating agents with physiologically active compounds. An ideal bifunctional chelator should have an active functional group that is condensed with the physiologically active compound and a chelating group that forms a stable chelate with the gamma-irradiated metal ion. Aromatic isothiocyanates and ammonia