1. Nano Science and Technology Institute, University of Science and Technology of China, Suzhou, Jiangsu 215123, China
2. Chinese Academy of Sciences Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, University of Chinese Academy of Sciences, Shanghai 201203, China
3. School of Chinese Materia Medica, Nanjing University of Chinese Medicine, Nanjing, Jiangsu 210023, China
4. University of Chinese Academy of Sciences, Beijing 100049, China