Kanuma, Kosuke; Omodera, Katsunori; Nishiguchi, Mariko; Funakoshi, Takeo; Chaki, Shigeyuki; Semple, Graeme; Tran, Thuy-Anh; Kramer, Bryan; Hsu, Debbie; Casper, Martin; Thomsen, Bill; Beeley, Nigel; Sekiguchi, Yoshinori Bioorganic and Medicinal Chemistry Letters, 2005, vol. 15, # 10 p. 2565 - 2569 doi: 10.1016/j.bmcl.2005.03.052