The present invention relates to a type 2 helper T cell-selective immune response inhibitor, an immune response regulator and an anti-allergic agent, individually comprising, as an active ingredient, a purine derivative represented by General Formula (I):
wherein
R2 is hydrogen or a hydrocarbon group in which —CH2— not directly bound to the purine skeleton may be substituted by CO, SO2, O or S, and C—H not directly bound to the purine skeleton may be substituted by N, C-halogen or C—CN;
R6 is hydroxyl, amino or amino which is mono- or di-substituted by a hydrocarbon group(s);
R8 is hydroxyl, mercapto, acyloxy or hydrocarbon group-substituting oxycarbonyloxy; and
R9 is a hydrocarbon group in which —CH2— not directly bound to the purine skeleton may be substituted by CO, SO2, O or S, and C—H not directly bound to the purine skeleton may be substituted by N, C-halogen or C—CN;
or its tautomer or a salt of the purine derivative or the tautomer.
本发明涉及一种选择性抑制T细胞辅助型2型免疫应答的免疫应答调节剂、免疫调节剂和抗过敏剂,分别包括一种以通式(I)表示的
嘌呤衍
生物作为活性成分:其中R2是氢或烃基,在其中—
CH2—不直接与
嘌呤骨架结合的部分可能被CO、SO2、O或S取代,而未直接与
嘌呤骨架结合的部分可能被N、C-卤或C—CN取代;R6是羟基、
氨基或被一个或两个烃基取代的
氨基;R8是羟基、巯基、酰氧基或烃基取代的氧羰氧基;以及R9是烃基,在其中— —不直接与
嘌呤骨架结合的部分可能被CO、SO2、O或S取代,而未直接与
嘌呤骨架结合的部分可能被N、C-卤或C—CN取代;或其互变异构体或
嘌呤衍
生物或其互变异构体的盐。