1. Department of Chemistry
2. Nankai University
3. Tianjin 300071
4. P. R. China
5. Tianjin Key Laboratory of Medical Epigenetics & School of Basic Medical Sciences
6. Tianjin Medical University
7. Tianjin 300070
8. Institute of Biochemistry and Molecular Biology
9. ZBMZ
10. University of Freiburg
11. 79104 Freiburg
12. Germany
13. National Chromatographic Research and Analysis Center