Shono, Tatsuya; Nozoe, Tetsuo; Maekawa, Hirofumi; Yamaguchi, Yoshihide; Kanetaka, Shinya; Masuda, Haruhisa; Okada, Toshio; Kashimura, Shigenori Tetrahedron, 1991, vol. 47, # 4-5 p. 593 - 603 doi: 10.1016/S0040-4020(01)87049-6