Kang, Iou-Jiun; Wang, Li-Wen; Hsu, Sheng-Ju; Lee, Chung-Chi; Lee, Yen-Chun; Wu, Yen-Shian; Hsu, Tsu-An; Yueh, Andrew; Chao, Yu-Sheng; Chern, Jyh-Haur Bioorganic and Medicinal Chemistry Letters, 2009 , vol. 19, # 15 p. 4134 - 4138