1. Key Laboratory of Advanced Synthetic Chemistry (Yunnan Minzu University), State Ethnic Affairs Commission, Kunming 650500, China
2. Key Laboratory of Medicinal Chemistry for Natural Resource, Ministry of Education and Yunnan Province, Yunnan University, Kunming 600091, China
3. Yunnan Tiefeng High Tech Mining Chemicals Co. Ltd., Qingfeng Industrial Park, Lufeng 651200, Yunnan, China