An N-acyl anthranilic acid derivative represented by general formula (1) or a salt thereof is useful for prevention or treatment of diseases associated with excessive production of collagen. (In the formula, R1 represents a carboxyl group or the like; R2 represents a hydrogen atom or the like; R3 represents an optionally substituted aryl group or the like; X1 represents a carbonyl group; X2 represents a bonding hand; X3 represents a bonding hand; X4 represents a bonding hand or the like; and A represents an optionally substituted phenyl group or the like.)
通式(1)代表的 N-酰基
蒽酸衍
生物或其盐可用于预防或治疗与
胶原蛋白过度生成有关的疾病。(式中,R1 代表羧基或类似物;R2 代表氢原子或类似物;R3 代表任选取代的芳基或类似物;X1 代表羰基;X2 代表键手;X3 代表键手;X4 代表键手或类似物;A 代表任选取代的苯基或类似物)。