1. College of Pharmacy, Ningxia Medical University, Yinchuan 750004, China
2. Ningxia Engineering and Technology Research Center for Modernization of Chinese Medicine, Yinchuan 750004, China
3. Ningxia Medical University, Yinchuan 750004, China
4. Key Laboratory of Ningxia Ethnomedicine Modernization, Ministry of Education, Ningxia Medical University, Yinchuan 750004, China