1. School of Biology and Chemistry, Minzu Normal University of Xingyi, Xingyi, P. R. China
2. State Key Laboratory of Bioactive Substance and Function of Natural Medicines, and Beijing Key Laboratory of Active Substance Discovery and Druggability Evaluation, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Xicheng District, P. R. China
3. School of Pharmaceutical Sciences, Shandong First Medical University & Shandong Academy of Medical Sciences, Taian, P. R. China