Zhou, Guo-Chun; Weng, Zhibing; Shao, Xiaoxia; Liu, Fang; Nie, Xin; Liu, Jinsong; Wang, Decai; Wang, Chunguang; Guo, Kai Bioorganic and Medicinal Chemistry Letters, 2013 , vol. 23, # 24 p. 6549 - 6554