1. Shanghai Institute of Materia Medica Chinese Academy of Sciences Shanghai 201203 China
2. Department of Pharmacy Medical College of Nanchang University Nanchang 330066 China
3. Department of Medicinal Chemistry Shanghai Hansoh Biomedical R&D Inc. Shanghai 201203 China
4. State Key Laboratory of Drug Research Shanghai Institute of Materia Medica Chinese Academy of Sciences Shanghai 201203 China