Takahashi, Kenji; Kasai, Masayasu; Ohta, Masaru; Shoji, Yoshimichi; Kunishiro, Kazuyoshi; Kanda, Mamoru; Kurahashi, Kazuyoshi; Shirahase, Hiroaki Journal of Medicinal Chemistry, 2008 , vol. 51, # 15 p. 4823 - 4833