Ikeda, Kiyoshi; Sato, Kazuki; Nishino, Reiko; Aoyama, Shinya; Suzuki, Takashi; Sato, Masayuki Bioorganic and Medicinal Chemistry, 2008, vol. 16, # 14 p. 6783 - 6788 doi: 10.1016/j.bmc.2008.05.055