| abstract |
The present invention provides a compound that enhances the production of erythropoietin. Specifically, a compound represented by formula (1) is disclosed: (See Formula). Where R1 represents a group represented by formula (1A): (See Formula) wherein R4 and R5 independently represent H, a halogen atom, or an alkyl group; R6 represents H, a halogen atom, an alkyl group, or the like; R7 represents an optionally substituted hydroxy-alkyl group, an optionally substituted alkyl hydroxy-halo OH group, an optionally substituted alkoxy-alkyl group, or the like; the substituent group a includes an oxo group, a hydroxyl group, an amino group, and the like; ring Q1 represents a monocyclic heterocyclic ring group; ring Q2 represents a monocyclic hydrocarbon ring group, or a monocyclic heterocyclic ring group; ring Q3 represents a monocyclic hydrocarbon ring group, or a monocyclic heterocyclic ring group; and X represents an individual bond, a methylene group, an ethylene group, or the like; R2 represents an alkyl group, or a methyl sulfanyl group; and R3 represents H, or a methyl group, or the like. |