1. Center for Supramolecular Chemistry & Catalysis and Department of Chemistry, College of Science, Shanghai University, 99 Shang-Da Road, Shanghai 200444, China
2. Department of Organic Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691, Stockholm, Sweden
3. Department Skaggs Institute for Chemical Biology and Department of Chemistry, The Scripps Research Institute, 210550 North Torrey Pines Road, La Jolla, CA 92037, USA