1. Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, 44 West Culture Road, Jinan, 250012 Shandong, PR China
2. School of Pharmaceutical Sciences, Southern Medical University, 1838 North Guangzhou Ave, Guangzhou 510515, PR China
3. The Key Laboratory of Infection and Immunity of Shandong Province, Department of Pharmacology, School of Basic Medical Sciences, Shandong University, Jinan 250012, China