1. Key Laboratory of Chemistry in Ethnic Medicinal Resources Yunnan Minzu University 650500 Kunming Yunnan P. R. China
2. Yunnan Tiefeng High Tech Mining Chemicals Co.Ltd Qingfeng industrial park 651200 Lufeng P. R. China
3. College of Biology and Chemistry Puer University 665000 Puer Yunnan P. R. China