1. Antibiotics Research and Re-evaluation Key Laboratory of Sichuan Province, Sichuan Industrial Institute of Antibiotics School of Pharmacy Chengdu University Chengdu 610106 People's Republic of China
2. Jinhua Branch, Sichuan Industrial Institute of Antibiotics Chengdu University Jinhua 321007 People's Republic of China
3. Department of Preparation Center General Hospital of Ningxia Medical University Yinchuan 750004 People's Republic of China
4. College of Pharmacy Jinhua Polytechnic Jinhua 321007 People's Republic of China
5. Shanghai Institute of Materia Medica Chinese Academy of Sciences Shanghai 201203 People's Republic of China
6. Zhongshan Institute for Drug Discovery, the Institutes of Drug Discovery and Development Chinese Academy of Sciences Zhongshan 528400 People's Republic of China