1. Guangxi Key Laboratory of Enhanced Recovery after Surgery for Gastrointestinal Cancer Clinical Laboratory Center Department of Clinical Laboratory The First Affiliated Hospital of Guangxi Medical University Shuangyong Road 6 530021 Nanning P. R. China.
2. Department Guangxi Key Laboratory of Bioactive Molecules Research and Evaluation School of Pharmacy Guangxi Medical University Shuangyong Road 22 530021 Nanning P. R. China.
3. College of Chemistry Xiangtan University Xiangtan 411105 P. R. China.