1. School of Biomedical and Pharmaceutical Sciences
2. Guangdong University of Technology
3. Guangzhou 510006
4. P. R. China
5. Department of Chemistry
6. Lakehead University and Thunder Bay Regional Health Research Institute
7. Thunder Bay
8. Canada
9. State Key Laboratory of Chemical Biology and Drug Discovery
10. Department of Applied Biology Chemical Technology
11. The Hong Kong Polytechnic University
12. Kowloon
13. China