| 摘要 |
An objective of the present invention is to provide a specific compound and composition for the prevention or therapy of diseases associated with immunodeficiency. Isoflavan derivatives which are a glycyrrhiza extract and chemical derivatives thereof, i.e., a compound represented by general formula (II): <CHEM> Äwhere R<1>, R<2>, R<3>, and R<4> may be identical with or different from one another and may each be hydrogen, an alkyl group which may be substituted, an alkenyl group which may be substituted, an alkynyl group which may be substituted, an acyl group which may be substituted, an aralkyl group which may be substituted, or a tri-substituted silyl group; G<1>, G<2>, and G<3> may be identical with or different from one another and may each be a hydrogen, an acyl group which may be substituted, or an aliphatic hydrocarbon group which may be substituted; symbol (*) indicates the presence of an asymmetric carbon atom, meaning an R form, an S form, or a mixture thereofÜ, or a salt thereof, or a hydrate thereof has immunoactivating actions, and is expected to provide effects as a biophylaxis function promoter by way of lymphocyte function promoting actions and bone marrow function promoting actions. |
