Ohtake, Yoshihito; Sato, Tsutomu; Matsuoka, Hiroharu; Nishimoto, Masahiro; Taka, Naoki; Takano, Koji; Yamamoto, Keisuke; Ohmori, Masayuki; Higuchi, Takashi; Murakata, Masatoshi; Kobayashi, Takamitsu; Morikawa, Kazumi; Shimma, Nobuo; Suzuki, Masayuki; Hagita, Hitoshi; Ozawa, Kazuharu; Yamaguchi, Koji; Kato, Motohiro; Ikeda, Sachiya Bioorganic and Medicinal Chemistry, 2011 , vol. 19, # 18 p. 5334 - 5341