Imaeda, Yasuhiro; Kawamoto, Tetsuji; Tobisu, Mamoru; Konishi, Noriko; Hiroe, Katsuhiko; Kawamura, Masaki; Tanaka, Toshimasa; Kubo, Keiji Bioorganic and Medicinal Chemistry, 2008 , vol. 16, # 6 p. 3125 - 3140