The present invention provides compounds useful as agents for the prevention or treatment of a disease associated with abnormal plasma uric acid level and the like. The present invention relates to fused ring derivatives represented by the following formula (I) having xanthine oxidase inhibitory activities and useful as agents for the prevention or treatment of a disease associated with abnormality of plasma uric acid level, prodrugs thereof, salts thereof or the like. In the formula (I), X1 and X2 represent CH or N; ring U represents aryl or heteroaryl; m represents integral number from 0 to 2; n represents integral number from 0 to 3; R1 represents a hydroxy group, amino or C1-6 alkyl; R2 represents C1-6 alkyl, C1-6 alkoxy C1-6 alkyl or the like.
本发明提供了可用于预防或治疗与血浆
尿酸水平异常有关的疾病等的化合物。本发明涉及具有
黄嘌呤氧化酶抑制活性并可用作预防或治疗与血浆
尿酸水平异常有关的疾病的药物的下式(I)所代表的融合环衍
生物、其原药、其盐或类似物。式(I)中,X1 和 X2 代表 CH 或 N;环 U 代表芳基或杂芳基;m 代表 0 至 2 的整数;n 代表 0 至 3 的整数;R1 代表羟基、
氨基或 C1-6 烷基;R2 代表 C1-6 烷基、C1-6 烷氧基 C1-6 烷基或类似物。