1. School of Chemistry and Chemical Engineering
2. Qufu Normal University
3. Qufu
4. P. R. China
5. Ministry of Education
6. Key Laboratory of Tibetan Medicine Research & Qinghai Key Laboratory of Qinghai-Tibet Plateau Biological Resources
7. Northwest Institute of Plateau Biology
8. Chinese Academy of Science
9. Xining 810001
10. Department of Chemistry
11. University of Bath
12. Bath
13. UK