Affiliation: | 1. Forestry and Forest Products Research Institute, P. O. Box 16, Tsukuba Norin Kenkyu Danchi-nai, Tsukuba, Ibaraki, 305, Japan 2. National Institute of Sericultural and Entomological Science, Ohwashi, Tsukuba, Ibaraki, 305, Japan 3. Fuji Flavor Co. Ltd., Midorigaoka, Hamura, Tokyo, 190-11, Japan 4. Sankei Chemicals Co. Ltd, Hukaya, Saitama, 366, Japan
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