1. Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources (Ministry of Education of China)
2. School of Chemistry and Pharmaceutical Science
3. Guangxi Normal University
4. Guilin 541004
5. P. R. China
6. Institut de Chimie de Strasbourg
7. CNRS-UMR7177
8. Université de Strasbourg
9. 67008 Strasbourg
10. France