Mimori, Seisuke; Koshikawa, Yukari; Mashima, Yu; Mitsunaga, Katsuyoshi; Kawada, Koichi; Kaneko, Masayuki; Okuma, Yasunobu; Nomura, Yasuyuki; Murakami, Yasuoki; Kanzaki, Tetsuto; Hamana, Hiroshi Bioorganic and Medicinal Chemistry Letters, 2015, vol. 25, # 4 p. 811 - 814 doi: 10.1016/j.bmcl.2014.12.080