Tang, Qidong; Zhang, Guogang; Du, Xinming; Zhu, Wufu; Li, Ruijuan; Lin, Huafang; Li, Pengcheng; Cheng, Maosheng; Gong, Ping; Zhao, Yanfang Bioorganic and Medicinal Chemistry, 2014, vol. 22, # 4 p. 1236 - 1249 doi: 10.1016/j.bmc.2014.01.014