1. Department of Chemistry, Zhejiang University, 38 Zheda Road, Hangzhou, Zhejiang 310027, People's Republic of China; Hangzhou Tea Factory Company Ltd., 58 Kaixuan Road, Hangzhou, Zhejiang 310016, People's Republic of China; and Yuanxun Tea Factory of National Wuyi Mountain Nature Preservation Zone, Tongmu, Xingcun, Wuyishan, Fujian 354315, People's Republic of China