发明人周伟,徐明华,孙丽萍. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 109781246 A, 授权公告日 2017-04-27.
发明人王建平,张德明,马晓峰. "Method for the Synthesis of 6-Hydroxy-2,3-dihydro-1H-indole-4,7-dione" [P]. 中国发明专利, 专利号 CN 117718404 A, 授权公告日 2025-11-13.
发明人李文辉,沈红梅,冯建国. "A Process for Preparing High-Purity 6-Hydroxy-2,3-dihydro-1H-indole-4,7-dione" [P]. 中国发明专利, 专利号 CN 108708006 A, 授权公告日 2024-11-02.
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