1. Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission & Ministry of Education, School of Ethnic Medicine, Yunnan Minzu University, Kunming, P. R. China
2. Department of Chemical Science and Technology, Kunming University, Kunming, P. R. China
3. Collge of Resource and Environment, Yuxi Normal University, Yuxi, P.R. China
4. Yunnan Bai Yao Group Innovation and R&D Center, Yunnan Baiyao Industry Co., Ltd, Kunming, P. R. China