Guo-Dong Chen1, Dan Hu1, Hao Gao1, Xin-Sheng Yao2. 1. Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China. 2. Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, China. Electronic address: tyaoxs@jnu.edu.cn.