It took 20 min for synthesizing 18F-FDDNP at CPCU, the radiochemical yield was 35.7% (end of synthesis), the radiochemistry purity was over 95%.

• 18F-FDDNP放化产率为35.；7%25(不校正)；合成时间为20min；无需HPLC分离；放化纯>95%25。