1. State Key Laboratory of Functions and Applications of Medicinal Plants, the key laboratory of Chemistry for Natural Products of Guizhou Province and Chinese Academy of Sciences, Guizhou Medical University, Guiyang 550025, P.R. China
2. School of Basic Medical Science, Guizhou Medical University, Guiyang 550025, P.R. China
3. State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550025, P.R. China