1. Ministry of Education (MOE) Key Laboratory of Protein Sciences, School of Pharmaceutical Sciences, MOE Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology, Tsinghua University, Beijing 100084, P. R. China
2. Tsinghua-Peking Center for Life Sciences, Beijing 100084, P. R. China
3. Key Laboratory of Structure-Based Drugs Design & Discovery of Ministry of Education, Shenyang Pharmaceutical University, Shenyang 110016, P. R. China
4. R&D Institute, Chia Tai Tianqing Pharmaceutical Group Co., LTD, Nanjing 210023, P. R. China