1. Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (MOE), School of Pharmacy, Shandong University, Jinan, Shandong 250012, China
2. Department of Biochemistry & Molecular Biology, School of Medicine, Shandong University, Jinan, Shandong 250012, China
3. National Research Institute of Chinese Medicine, Taipei 112, Taiwan
4. Duke University, School of Medicine, Durham, NC 27705, USA