The present invention provides a compound promoting production of erythropoietin.Provided is a compound represented by formula (1) [in the formula, R1: aromatic hydrocarbon ring group and aromatic heterocycle group R2: hydrogen, alkyl and heterocycle alkyl R3: hydrogen and alkyl A: hydrogen, hydroxyl L: -NHCO-, -OCH2- X: nitrogen, =CH-].本發明係提供一種促進紅血球生成素之產生之化合物。本發明提供以式(1)所表示之化合物[式中,R1:芳香族烴環基、芳香族雜環基;R2:氫原子、烷基、雜環烷基;R3:氫原子、烷基;A:氫原子、羥基;L:-NHCO-、-OCH2-;X:氮原子、=CH-]。