1. College of Pharmacy Guizhou Provincial Engineering Technology Research Center for Chemical Drug R&D, Guizhou Provincial Key Laboratory of Pathogenesis and Drug Research on Common Chronic Diseases, Guizhou Medical University Guiyang 550004 P. R. China
2. Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education Guizhou University Guiyang 550025 P. R. China