1. Institute of Materia Medica, Jilin Province Academy of Traditional Chinese Medicine and Materia Medica, Changchun 130021, People's Republic of China, Department of Natural Medicine and Phytochemistry, Meiji Pharmaceutical University, 2-522-1 Noshio, Kiyose-shi, Tokyo, 204-8588, Japan, and Institute of Biological Engineering, Dalian University, Dalian 110066, People's Republic of China