Zheng, Xiaoxia; Oda, Hiroyuki; Takamatsu, Kayo; Sugimoto, Yukio; Tai, Akihiro; Akaho, Eiichi; Ali, Hamed Ismail; Oshiki, Toshiyuki; Kakuta, Hiroki; Sasaki, Kenji Bioorganic and Medicinal Chemistry, 2007 , vol. 15, # 2 p. 1014 - 1021