1. School of Pharmacy
2. China Pharmaceutical University
3. Nanjing 210009
4. China
5. CAS Key Laboratory of Receptor Research
6. Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province
7. Sichuan Industrial Institute of Antibiotics
8. Chengdu University
9. Chengdu 610052
10. People's Republic of China
11. Shanghai Institute of Materia Medica
12. Chinese Academy of Sciences
13. Shanghai 201203
14. P. R. China