Kurata, Haruto; Kusumi, Kensuke; Otsuki, Kazuhiro; Suzuki, Ryo; Kurono, Masakuni; Tokuda, Natsuko; Takada, Yuka; Shioya, Hiroki; Mizuno, Hirotaka; Komiya, Takaki; Ono, Takeji; Hagiya, Hiroshi; Minami, Masashi; Nakade, Shinji; Habashita, Hiromu Bioorganic and Medicinal Chemistry Letters, 2012, vol. 22, # 1 p. 144 - 148 doi: 10.1016/j.bmcl.2011.11.048