| abstract |
(57) [Summary] [Structure] General formula: [Wherein R 1 is a hydrogen group or a halogen group, R 2 is a lower alkyl group, R 3 is a hydrogen atom or a lower alkyl group, R 4 is a hydroxyl group, an amino group or a lower alkyloxy group, A is a sulfur atom or = N -R 5 (R 5 is a hydrogen atom or a lower alkyl group). ] The benzofuran derivative shown by these, or its pharmaceutically acceptable salt. [Effect] This compound exhibits a uric acid excretion action and is useful as a therapeutic agent for hyperuricemia. |