1. School of Forensic Medicine & NHC Key Laboratory of Drug Addiction Medicine Kunming Medical University Kunming 650500 People's Republic of China
2. School of Pharmaceutical Science & Yunnan Key Laboratory of Pharmacology for Natural Products Kunming Medical University Kunming 650500 People's Republic of China
3. Key Laboratory of Medicinal Chemistry for Natural Resource Ministry of Education and Yunnan Province Yunnan University Kunming 650091 People's Republic of China
4. Key Laboratory of Forest Resources Conservation and Utilization in the Southwest Mountains of China Ministry of Education Southwest Forestry University Kunming 650224 People's Republic of China