1. State Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources
2. School of Chemistry and Pharmaceutical Sciences
3. Guangxi Normal University
4. Guilin 541004
5. P. R. China
6. Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials
7. College of Chemistry and Bioengineering
8. Guilin University of Technology
9. Guilin