CHROMONE DERIVATIVE AND ALDOSE REDUCTASE INHIBITOR CONTAINING THE SAME AS ACTIVE INGREDIENT.

摘要

A chromone derivative represented by general formula (I) and an aldose reductase inhibitor containing the same as the active ingredient wherein R1 and R2 represent each lower alkyl, etc.; R3 represents oxygen, sulfur, etc.; R7 represents (un)substituted phenyl, etc.; and R4 represents hydrogen or lower alkoxy. This compound is excellent in the inhibition of aldose reductase and is useful for treating various complications accompanying diabetes.