| 摘要 |
The present invention provides a compound which is highly safe in terms of toxicity and has a stronger antiallergic action, and particularly has an action of inhibiting both immediate and delayed type allergic reactions. A benzopyran derivative represented by the general formula (I):wherein R<1 >is an alkyl group having 1-10 carbon atoms or an alkenyl group having 2-10 carbon atoms, and one of R<2>, R<3>, R<4>, and R<5 >is an alkoxy group substituted with a hydroxy group or an alkoxy group substituted with a carboxy group, and the others are hydrogen atomsor physiologically acceptable salts thereof are superior as the active ingredient of an antiallergic agent.
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