1. Department of Chemistry, Department of Chemical Biology, College of Chemistry and Chemical Engineering, Key Laboratory for Chemical Biology of Fujian Province; Xiamen University; Xiamen 361005 Fujian China
2. School of Pharmaceutical Sciences; Xiamen University; Xiamen 361102 Fujian China
3. Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology (Ministry of Education), Department of Chemistry; Tsinghua University; Beijing 100084 China