The present invention provides a compound which enhances the production of erythropoietin. The present invention provides a compound represented by formula (1): [wherein, R 1 : formula (1A) : [wherein, R 4 and R 5 : H, halogen, or alkyl； R 6 : H, halogen, alkyl, or the like； R 7 : substitutable hydroxyalkyl, substitutable hydroxyhalo alkyl, substitutable alkoxyalkyl, or the like； substituent group ±: oxo, hydroxy, amino, or the like； ring Q 1 : a monocyclic heterocyclic group； ring Q 2 : a monocyclic hydrocarbon ring group, or a monocyclic heterocyclic group； ring Q 3 : a monocyclic hydrocarbon ring group, or a monocyclic heterocyclic group； X: a single bond, methylene, ethylene, or the like]； R 2 : alkyl, or methylsulfanyl； and R 3 : H, or methyl], or the like.
