Goto, Taiji; Shiina, Akiko; Yoshino, Toshiharu; Mizukami, Kiyoshi; Hirahara, Kazuki; Suzuki, Osamu; Sogawa, Yoshitaka; Takahashi, Tomoko; Mikkaichi, Tsuyoshi; Nakao, Naoki; Takahashi, Mizuki; Hasegawa, Masashi; Sasaki, Shigeki Bioorganic and Medicinal Chemistry Letters, 2013, vol. 23, # 11 p. 3325 - 3328 doi: 10.1016/j.bmcl.2013.03.104