Bai, Xing-Feng; Gao, Guang; Zheng, Zhan-Jiang; Li, Fei; Lai, Guo-Qiao; Jiang, Kezhi; Li, Fuwei; Xu, Li-Wen Synlett, 2011, # 20 p. 3031 - 3035 doi: 10.1055/s-0031-1289907