Cheng, Jin-Tang; Li, Yan; He, Juan; Li, Xing-Yao; Wu, Xing-De; Shao, Li-Dong; Dong, Liao-Bin; Deng, Xu; Gao, Xiu; Peng, Li-Yan; Cheng, Xiao; Zhao, Qin-Shi Helvetica Chimica Acta, 2012 , vol. 95, # 7 p. 1158 - 1163