BENZOPYRAN DERIVATIVE AND ANTIALLERGIC AGENT CONTAINING THE SAME AS ACTIVE INGREDIENT

摘要

An antiallergic agent with a low toxicity and an excellent efficacy, containing a benzopyran derivative represented by general formula (I) as the active ingredient, wherein R<1> and R<2> represent each hydrogen, acyl, C1 to C12 alkyl or C2 to C10 alkenyl; and R<3> represents hydroxy, acyloxy, C1 to C10 alkoxy or C2 to C10 alkenyloxy.