1. b Key Laboratory of Marine Drugs , Ministry of Education, China; Marine Drug and Food Institute, Ocean University of China , Qingdao, 266003, China
2. c Yunnan College of Traditional Chinese Medicine , Kunming, 650200, China
3. a The State Key Laboratory of Phytochemistry and Plant Resources in West China , Kunming Institute of Botany, Chinese Academy of Sciences , Kunming, 650204, China