1. Department of Chemistry, The Chinese University of Hong Kong, Shatin, N.T., Hong Kong 999077, China
2. The Cancer Hospital of the University of Chinese Academy of Sciences (Zhejiang Cancer Hospital), Institute of Basic Medicine and Cancer (IBMC) Chinese Academy of Sciences, Hangzhou, Zhejiang 310022, China
3. School of Biology and Biological Engineering, South China University of Technology, Guangzhou, Guangdong 510006, China