Li, Shuxin; Yao, Zhenglin; Zhao, Yanjin; Chen, Wei; Wang, Huijia; Kuang, Xianzhao; Zhan, Wenhu; Yao, Shan; Yu, Shanyou; Hu, Wenxiang Bioorganic and Medicinal Chemistry Letters, 2012 , vol. 22, # 16 p. 5279 - 5282