Tamiaki, Hitoshi; Tsuji, Kazuki; Kuno, Masaki; Kimura, Yuki; Watanabe, Hiroaki; Miyatake, Tomohiro Bioorganic and Medicinal Chemistry Letters, 2016, vol. 26, # 13 p. 3034 - 3037 doi: 10.1016/j.bmcl.2016.05.008