1. State Key Laboratory of Medicinal Chemical Biology
2. Key Laboratory of Bioactive Materials
3. Ministry of Education, and College of Life Sciences
4. Nankai University
5. Tianjin 300071
6. Department of Urology
7. Tianjin First Central Hospital
8. Tianjin 300192
9. P. R. China
10. Tianjin Stomatological Hospital
11. Hospital of Stomatology
12. Tianjin 300041