1. Shanghai
Advanced Research Institute, Chinese Academy of Sciences, 99 Haike
Road, Shanghai 201210, China
2. CAS
Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai
Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
3. Department
of Chemistry, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, United States