Sugimoto, Tomohiro; Shimazaki, Yoichi; Manaka, Akira; Tanikawa, Tetsuya; Suzuki, Keiko; Nanaumi, Kayoko; Kaneda, Yoshie; Yamasaki, Yukiko; Sugiyama, Hiroyuki Bioorganic and Medicinal Chemistry Letters, 2012, vol. 22, # 17 p. 5739 - 5743 doi: 10.1016/j.bmcl.2012.06.092