Qian, Wangke; Lu, Weijian; Sun, Haifeng; Li, Zeng; Zhu, Liyuan; Zhao, Rui; Zhang, Lei; Zhou, Shengbin; Zhou, Yu; Jiang, Hualiang; Zhen, Xuechu; Liu, Hong Bioorganic and Medicinal Chemistry, 2012 , vol. 20, # 15 p. 4862 - 4871