1. State Key Laboratory of Natural and Biomimetic Drugs Department of Chemical Biology School of Pharmaceutical Sciences Peking University Beijing 100191 China
2. State Key Laboratory of Medicinal Chemical Biology College of Pharmacy Nankai University Tianjin 300071 China
3. College of Chemistry and Molecular Engineering Synthetic and Functional Biomolecules Center Beijing National Laboratory for Molecular Sciences Key Laboratory of Bioorganic Chemistry and Molecular Engineering of Ministry of Education Peking University Beijing 100871 China