1. Shenyang Pharmaceutical University No. 103 Wenhua Road, Shenhe District Shenyang 110016 P. R. China
2. Guiyang College of Traditional Chinese Medicine Guiyang 550002 P. R. China
3. Key Laboratory of Structure-Based Drug Design and Discovery, Ministry of EducationShenyang Pharmaceutical University Shenyang 110016 P. R. China