ISOFLAVANE DERIVATIVES AND IMMUNOPOTENTIATING COMPOSITIONS CONTAINING THE SAME

摘要

Compounds originating in licorice root and represented by general formula (II), salts thereof or hydrate of the same which have immunopotentiating effects and mediate actions of accelerating lymphocyte functions and accelerating bone marrow functions. Owing to these characteristics, the above compounds are useful as vital defensive function accelerators. In said formula (II), R<1>, R<2>, R<3> and R<4> are the same or different and each represents hydrogen, optionally substituted alkyl, optionally substituted alkenyl, optionally substituted alkynyl, optionally substituted acyl, optionally substituted aralkyl or tri-substituted silyl; G<1>, G<2> and G<3> are the same or different and each represents hydrogen, optionally substituted acyl or optionally substituted aliphatic hydrocarbyl; and the mark (*) means an asymmetric carbon atom.