The present invention provides an erythropoietin expression-enhancing agent that can cancel the suppression of erythropoietin production or promote erythropoietin production, and a therapeutic or preventive drug for anemia, a liver function-improving agent, an ischemic injury-improving agent, a renal protective agent, and an insulin secretagogue comprising the erythropoietin expression-enhancing agent. The erythropoietin expression-enhancing agent of the present invention comprises one or more compounds selected from the group consisting of compounds represented by the following general formulas (I), (II), and (III) and pharmaceutically acceptable salts thereof when R3 is OH.
本发明提供了一种可消除对促红细胞生成素生成的抑制或促进促红细胞生成素生成的促红细胞生成素表达剂,以及包含该促红细胞生成素表达剂的贫血治疗或预防药物、肝功能改善剂、缺血性损伤改善剂、肾保护剂和
胰岛素分泌剂。本发明的红细胞生成素表达
促进剂包括一种或多种选自由下列通式(I)、(II)和(III)所代表的化合物组成的化合物及其药学上可接受的盐,当 R3 为 OH 时。