This work was financially supported by the National Natural Science Foundation of China (Nos. 21606081, 21605077), Opening Fund of Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research (Hunan Normal University) Ministry of Education (KLCBTCMR2011-08), Introduce Talents Fund of Hunan Agricultural University (13YJ01).
1College of Science, Hunan Agricultural University, Changsha 410128, People’s Republic of China 2Guangdong Provincial Key Laboratory of New Drug Screening, Guangzhou Key Laboratory of Drug Research for Emerging Virus Prevention and Treatment, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou 510515, People’s Republic of China