1. School of Pharmacy, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
2. Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
3. State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China
4. Key Laboratory of Synthetic Chemistry of Natural Substances, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai 200032, China