1. School of Medicine, Guangxi University of Science and Technology, Liuzhou, P. R. China;
2. Guangxi Key Laboratory of Green Processing of Sugar Resources, College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou, P.R. China;
3. Technology Center, Guangdong Ruyuan HEC Pharm. Co., Ltd, Ruyuan, P. R. China