1. Guangxi Key Laboratory of Functional Phytochemicals Research and Utilization, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region, Chinese Academy of Sciences, Guilin 541006, China
2. Graduate School of Pharmaceutical Sciences, Tokushima University, Tokushima 770-8505, Japan
3. Guangxi Key Laboratory of Plant Conservation and Restoration Ecology in Karst Terrain, Guangxi Institute of Botany, Guangxi Zhuang Autonomous Region, Chinese Academy of Sciences, Guilin 541006, China
4. College of life science, Guangxi Normal University, Guilin 5410061, China