Lin, Zi-Ping; Wong, Fung Fuh; Chen, Yen-Bo; Lin, Chun-Hung; Hsieh, Min-Tsang; Lien, Jin-Cherng; Chou, Yin-Hsuan; Lin, Hui-Chang Tetrahedron, 2013, vol. 69, # 19 p. 3991 - 3999 doi: 10.1016/j.tet.2013.03.020