abstract |
The present invention provides a compound having a low molecular weight EPO (erythropoietin) production promoting action. The following general formula (1): [Wherein R 1 , R 2 , R 3 , R 4 , R 5 , R 6 , R 7 represent a hydrogen atom or the like], or a salt thereof. The compound is effective for the prevention and / or treatment of diseases caused by decreased erythropoietin production, such as anemia. [Selection figure] None |