Huang, Yeun-Chih; Wu, Bin-Nan; Yeh, Jwu-Lai; Chen, Sheue-Jiun; Liang, Jyh-Chong; Lo, Yi-Ching; Chen, Ing-Jun Bioorganic and Medicinal Chemistry, 2001 , vol. 9, # 7 p. 1739 - 1746