Okada, Yoshio; Fujisawa, Yutaka; Morishita, Akihisa; Shiotani, Kimitaka; Miyazaki, Anna; Fujita, Yoshio; Li, Tingyou; Tsuda, Yuko; Yokoi, Toshio; Bryant, Sharon D.; Lazarus, Lawrence H. Tetrahedron Letters, 2002 , vol. 43, # 45 p. 8137 - 8139