1. College of Pharmacy, Liaoning University, 66 Chongshan Road, Shenyang 110036, Liaoning Province, P.R. China
2. College of Life and Environmental Sciences, Wenzhou University, Wenzhou 325035, Zhejiang Province, P.R. China
3. Research Center of Quality Safety for Agricultural Products, Tea Research Institute, Chinese Academy of Agricultural Sciences, Hangzhou 310008, P. R. China