1. Key Laboratory of Radiopharmaceuticals (Beijing Normal University), Ministry of Education, College of Chemistry; Beijing Normal University; Beijing 100875 China
2. Helmholtz-Zentrum Dresden-Rossendorf, Department of Neuroradiopharmaceuticals; Institute of Radiopharmaceutical Cancer Research; 04318 Leipzig Germany
3. Nuclear Medicine Department; Chinese PLA General Hospital; Beijing 100853 China