Tori, Motoo; Kohama, Yoshihiro; Nakashima, Katsuyuki; Asakawa, Yoshinori
Journal of the Chemical Society, Perkin Transactions 1: Organic and Bio-Organic Chemistry (1972-1999), 1994 , # 21 p. 3225 - 3230

Sakaino, Makoto; Meinwald, Jerrold
Tetrahedron Letters, 1987 , vol. 28, # 28 p. 3201 - 3204