Chu, Cheng-Ming; Tu, Zhijay; Wu, Pohsi; Wang, Chieh-Chieh; Liu, Ju-Tsung; Kuo, Chun-Wei; Shin, Yu-Hsuan; Yao, Ching-Fa Tetrahedron, 2009 , vol. 65, # 19 p. 3878 - 3885