7-Glykosyloxybenzopyranderivat und dieses enthaltendes antiallergisches Mittel

摘要

A 7-glycosyloxybenzopyran derivative represented by the following formula (I) wherein, R1 is a hydrogen atom, an acyl group, an alkyl group, a cycloalkyl group, an alkenyl group or an aralkyl group, R2 is a hydrogen atom, an alkyl group, a cycloalkyl group, an alkenyl group or an aralkyl group and R3 is a glycosyl group whose hydroxyl group is protected or not protected, selected from the group consisting of glucosyl, mannosyl and galactosyl groups, and physiologically acceptable salts thereof.