Ikeda, Masahiko; Takahashi, Kazuhiko; Dan, Akihito; Koyama, Kohji; Kubota, Katsumi; Tanaka, Tomoyuki; Hayashi, Masaji Bioorganic and Medicinal Chemistry, 2000, vol. 8, # 8 p. 2157 - 2166 doi: 10.1016/S0968-0896(00)00142-5