Yoshimi, Yasuharu; Ishise, Akihiro; Oda, Hiromu; Moriguchi, Yousuke; Kanezaki, Hiroki; Nakaya, Yukari; Katsuno, Kayoko; Itou, Tatsuya; Inagaki, Sho; Morita, Toshio; Hatanaka, Minoru Tetrahedron Letters, 2008 , vol. 49, # 21 p. 3400 - 3404