1. National Research Institute of Tea, Kanaya, Haibara, Shizuoka 428, Japan
2. Fuji Flavor Co., Ltd., Midorigaoka 3-5-8, Hamuramachi, Nishitama-gun, Tokyo 190-11, Japan
3. Central Research Institute, Japan Tobacco Inc., Umegaoka 6-2, Midori-ku, Yokohama 227, Japan