1. School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, China;
2. Pharmaceutical Research Laboratory, Shenyang Research Institute of Chemical Industry Co., Ltd, Shenyang, China;
3. School of Chemistry and Pharmaceutical Engineering, Jilin Institute of Chemical Technology, Jilin, China;
4. Department of Medicinal Chemistry and Natural Medicine Chemistry (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China), Harbin Medical University, Harbin, P. R. China