发明人王建平,陈志强,郑宇鹏. "一种吡格列酮杂质21的合成方法" [P]. 中国发明专利, 专利号 CN 111176440 A, 授权公告日 2024-03-08.
发明人陈志强,罗永刚,朱建伟. "Method for the Synthesis of Pioglitazone Impurity 21" [P]. 中国发明专利, 专利号 CN 112643995 A, 授权公告日 2023-06-19.
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