1. State Key Laboratory for Chemistry and Molecular Engineering of Medicinal Resources, Collaborative Innovation Center for Guangxi Ethnic Medicine, School of Chemistry and Pharmaceutical Sciences, Guangxi Normal University, Guilin 541004, People’s Republic of China
2. Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Republic of Korea
3. Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 124, Berlin 10623, Germany