PROBLEM TO BE SOLVED: To provide an anti-microorganism agent comprising 3,5-dihydroxy-2-menthenyl stilbene, a plant extract containing the above compound, and a bactericidal antibacterial agent as active ingredients, and to provide an application such as an oral composition in which the anti-microorganism agent is compounded.SOLUTION: The anti-microorganism agent is composed of: 3,5-dihydroxy-2-menthenyl stilbene (A), 3,5-dihydroxy-2-menthenyl stilbene (A) and 3,5-dihydroxy stilbene (B), or an extract of Lindera umbellata or its subspecies containing 3,5-dihydroxy-2-menthenyl stilbene (A) by 1 mass% or more in the solid content of the extract and/or 3,5-dihydroxy stilbene (B) by 1 mass% or more in the solid content and a bactericidal antibacterial agent. There is provided an application such as an oral composition containing the above (A) component, the (A) component and the (B) component, or the above extract, and the bactericidal antibacterial agent.COPYRIGHT: (C)2013,JPO&INPIT【課題】3,5-ジヒドロキシ-2-メンテニルスチルベン、それを含む植物抽出物と殺菌抗菌剤を有効成分とする抗微生物剤及びこれを配合した口腔用組成物等の応用を提供する。【解決手段】3,5-ジヒドロキシ-2-メンテニルスチルベン(A)、3,5-ジヒドロキシ-2-メンテニルスチルベン(A)及び3,5-ジヒドロキシスチルベン(B)、又は3,5-ジヒドロキシ-2-メンテニルスチルベン(A)を固形分の1質量%以上及び/又は3,5-ジヒドロキシスチルベン(B)を固形分の1質量%以上含有するクロモジ又はその亜種からの抽出物と、殺菌抗菌剤とからなる抗微生物剤。上記(A)成分、(A)及び(B)成分、又は上記抽出物と殺菌抗菌剤とを含有する口腔用組成物等の応用。【選択図】なし
