Chen, Chien-Tien; Chang, I-Hsin; Lin, Jin-Sheng; Liu, Chin-Jing; Chou, Y-Chen; Kuo, Jen-Huang; Li, Chun-Hsin; Barhate; Hon, Sang-Wen; Li, Tai-Wei; Chao, Shi-Deh; Liu, Chia-Cheng; Li, Ying-Chieh Organic Letters, 2001 , vol. 3, # 23 p. 3729 - 3732