A 4H-1-benzopyran-4-one derivative of the general formura [1], ##STR1## or a salt thereof exerts excellent effects on immunomodulation and cell adhesion inhibition, and is further expected to have the effect of relieving autoimmune diseases at a level comparable to that of steroids. Thus, the compound of the general formula [1] is useful in the teatment and prevention of autoimmune diseases fundamentally caused by immunopathy or unusually accelerated cell adhesion, for example, chronic rheumatoid arthritis, systemic lupus erythematosus, scleroderma, mixed connective tissue disease,polyarteritis nodosa, polymyositis/dermatomyositis, Sjogren's syndrome, Behcet's disease, multiple sclerosis, autoimmune diabetes, Hashimoto's disease, psoriasis, primary myxedema, pernicious anemia, serious adynamia, ulcerative colitis, chronic active hepatitis, autoimmune hemolytic anemia idiopathic thrombocytopenic purpura and the like.

4h 1 benzopyran 4 one/purpura

Immunomodulator, cell adhesion inhibtor, and agent for treating, and preventing autoimmune diseases

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