1. School of Pharmacy, Guangxi Medical University, Nanning, Guangxi 530021, China
2. Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (MOE), School of Pharmacy, Cheeloo College of Medicine, Shandong University, Jinan, Shandong 250012, China
3. State Key Laboratory of Microbial Technology, Shandong University, Jinan, Shandong 250100, China