Su, Jinyue; Qiu, Yatao; Ma, Kun; Yao, Yiwu; Wang, Zhen; Li, Xianling; Zhang, Dayong; Tu, Zhengchao; Jiang, Sheng Tetrahedron, 2014, vol. 70, # 42 p. 7763 - 7769 doi: 10.1016/j.tet.2014.05.078