1. Guangdong Provincial Key Laboratory of Chiral Molecule and Drug Discovery, School of Pharmaceutical Sciences, Sun Yat-sen University, Guangzhou 510006, P. R. China
2. HEC Research and Development Center, HEC Pharm Group, Dongguan 523871, P. R. China
3. Anti-infection Innovation Department, New Drug Research Institute, HEC Pharm Group, Dongguan 523871, P. R. China
4. School of Pharmacy, Xiangnan University, Chenzhou 423000, Hunan, China