1. Department of Medicinal Chemistry; Anhui University of Chinese Medicine; 103 Meishan Road Hefei 230031 China
2. State Key Laboratory of Natural Medicines and Department of Medicinal Chemistry; China Pharmaceutical University; 24 Tong Jia Xiang Nanjing 210009 China
3. Department of Physiology; China Pharmaceutical University; 24 TongJia Xiang Nanjing 210009 China