1Department of Medicinal Natural Product Chemistry, School of Pharmaceutical Sciences, Hebei Medical University, 361 Zhongshan East Road, Shijiazhuang, 050017, Hebei Province, P. R. China
2College of Basic Medicine, Hebei Medical University, 050017, Shijiazhuang, P. R. China
3North China Pharmaceutical Group Corporation, New Drug R&D Co., Ltd., 198 Huanghe Road, High Technology Industrial Zone, 050035, Shijiazhuang, Hebei Province, P. R. China
4Department of Bioscience and Biotechnology for Future Bioindustry, Graduate School of Agricultural Science, Tohoku University, 1 – 1 Tsutsumidori-Amamiya, Aoba-ku, Sendai, 981 – 8555, Japan
5Department of Environmental Biochemistry, Graduate School of Medicine, Chiba University, Inohana 1 – 8 – 1, Chuoku, Chiba, 260 – 8670, Japan