Shibata, Kayoko; Shingu, Kazushi; Vassilev, Vassil P.; Nishide, Kiyoharu; Fujita, Tetsuro; Node, Manabu; Kajimoto, Tetsuya; Wong, Chi-Huey Tetrahedron Letters, 1996 , vol. 37, # 16 p. 2791 - 2794