Hirayama, Takaharu; Okaniwa, Masanori; Imada, Takashi; Ohashi, Akihiro; Ohori, Momoko; Iwai, Kenichi; Mori, Kouji; Kawamoto, Tomohiro; Yokota, Akihiro; Tanaka, Toshimasa; Ishikawa, Tomoyasu Bioorganic and Medicinal Chemistry, 2013, vol. 21, # 17 p. 5488 - 5502 doi: 10.1016/j.bmc.2013.05.067