Imamura, Shinichi; Nishikawa, Youichi; Ichikawa, Takashi; Hattori, Taeko; Matsushita, Yoshihiro; Hashiguchi, Shohei; Kanzaki, Naoyuki; Iizawa, Yuji; Baba, Masanori; Sugihara, Yoshihiro Bioorganic and Medicinal Chemistry, 2005 , vol. 13, # 2 p. 397 - 416