Hattori, Yoshihide; Asano, Tomoyuki; Niki, Yoko; Kondoh, Hirofumi; Kirihata, Mitsunori; Yamaguchi, Yoshihiro; Wakamiya, Tateaki Bioorganic and Medicinal Chemistry, 2006 , vol. 14, # 10 p. 3258 - 3262