1. Center for Natural Products, Chengdu Institution of Biology, Chinese Academy of Science, Chengdu, Sichuan 610041, China
2. Green Pharmaceutical Technology Key Laboratory of Luzhou City, School of Pharmacy, Southwest Medical University, Luzhou, Sichuan 646000, China
3. State Key Laboratory of Southwestern Chinese Medicine Resources, The Ministry of Education Key Laboratory of Standardization of Chinese Herbal Medicine, School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, China