1. State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany Chinese Academy of Sciences Kunming 650201 P. R. China
2. School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products Kunming Medical University Kunming 650500 P. R. China
3. Guangxi Key Laboratory of Functional Phytochemicals Research and Utilization, Guangxi Institute of Botany Chinese Academy of Sciences Guilin 541006 P. R. China
4. Key Laboratory of Ethnic Medicine Resource Chemistry, State Ethnic Affairs Commission & Ministry of Education Yunnan Minzu University Kunming 650500 P. R. China