1 School of Chemical Sciences, The University of Auckland, Auckland, New Zealand.
2 State Key Laboratories of Natural and Biomimetic Drugs, Department of Chemical Biology, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, China.
3 Department of Chemistry, University of Puerto Rico, San Juan, Puerto Rico.
4 Department of Organic Chemistry, Faculty of Chemistry, University of Łódz, Łódz, Poland.