PROBLEM TO BE SOLVED: To provide an immunostimulator useful for the prevention/treatment of a variety of diseases, on which immunopotentiation through the expression enhancing action for a type I interferon gene or interleukin-3 gene has effect.SOLUTION: A compound is represented by the general formula (I) or general formula (II).【課題】Ｉ型インターフェロン遺伝子又はインターロイキン３遺伝子の発現増強作用による免疫賦活作用が有効性を示す、各種疾患の予防／治療に有用な免疫賦活剤の提供。【解決手段】一般式（Ｉ）又は一般式（ＩＩ）で表される化合物。【選択図】なし
