1. Hunan Provincial Engineering Research Center for Ginkgo Biloba, Hunan University of Science and Engineering, Yongzhou 425100, China
2. State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan University, Changsha 410082, China
3. Key Laboratory of Theoretical Organic Chemistry and Functional Molecule of Ministry of Education, Hunan University of Science and Technology, Xiangtan 411201, China