(ローレッシュ 欧州特許) Antibacterial agent against periodontal disease-associated bacterium and dental caries-associated bacterium, composition for periodontal disease prophylaxis and treatment, composition for cavity prophylaxis and treatment, composition for gum improvement, composition for gum ridge improvement, composition for inhibiting plaque accumulation, composition for xerostomia improvement, composition for saliva improvement, composition for inhibiting bad breath, and composition for constipation improvement.