1. Department of Pharmacy, Affiliated Hospital of Yangzhou University, Yangzhou University, Yangzhou 225009 Jiangsu Province, P. R. China
2. Department of Pharmacy, Medical School of Yangzhou University, Yangzhou University, Yangzhou 225009 Jiangsu Province, P. R. China
3. College of Plant Protection, Yangzhou University, Yangzhou 225009 Jiangsu Province, P. R. China
4. Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100193, P. R. China