Xia, Peng; Yin, Zhi-Jian; Chen, Ying; Zhang, Qian; Zhang, Beina; Xia, Yi; Yang, Zheng-Yu; Kilgore, Nicole; Wild, Carl; Morris-Natschke, Susan L.; Lee, Kuo-Hsiung Bioorganic and Medicinal Chemistry Letters, 2004 , vol. 14, # 12 p. 3341 - 3343