1. Carbohydrate Research Laboratory, Ensuiko Sugar Refining Co., Ltd., 13-46 Daikoku-cho, Tsurumi-ku, Yokohama 230, Japan
2. School of Pharmaceutical Sciences, Mukogawa Women’s University, 11-68 Koshien Kyuban-cho, Nishinomiya 663, Japan
3. Osaka Municipal Technical Research Institute, 1-6-50 Morinomiya, Jyoto-ku, Osaka 536, Japan