Author's Organization:Department of Bioresource Chemistry, Obihiro University of Agriculture and Veterinary Medicine Department of Bioresource Chemistry, Obihiro University of Agriculture and Veterinary Medicine Department of Bioresource Chemistry, Obihiro University of Agriculture and Veterinary Medicine Department of Bioresource Chemistry, Obihiro University of Agriculture and Veterinary Medicine Department of Bioresource Chemistry, Obihiro University of Agriculture and Veterinary Medicine