Kojima, Akihiko; Takita, Satoshi; Sumiya, Tatsunobu; Ochiai, Koji; Iwase, Kazuhiko; Kishi, Tetsuya; Ohinata, Akira; Yageta, Yuichi; Yasue, Tokutaro; Kohno, Yasushi Bioorganic and Medicinal Chemistry Letters, 2013, vol. 23, # 19 p. 5311 - 5316 doi: 10.1016/j.bmcl.2013.07.069