| abstract |
Provided are: a compound having a xanthine oxidase inhibitory activity, represented by general formula (I) (in the formula: R1 is a group or an atom selected from a hydrogen atom, a C1-C8 alkyl group, a C1-C8 alkyl group substituted with a halogen atom, a C1-C8 alkoxy group, a C2-C8 alkoxycarbonyl group, a formyl group, a carboxyl group, and a halogen atom; R2 is a cyano group or a nitro group; R3 and R4 are each a hydroxyl group or a C1-C8 alkoxy group; X is an oxygen atom or -S(O)n-; n is an integer of 0 to 2; and Y is an oxygen atom or a sulfur atom); a tautomer or a stereoisomer of said compound, or a pharmaceutically acceptable salt thereof; and a solvate thereof. |