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发明人何建平,胡光,冯建国. "Method for the Synthesis of 2-(2,5-Dioxo-2,5-dihydro-1h-pyrrol-1-yl)-5-hydroxybenzoic acid" [P]. 中国发明专利, 专利号 CN 113641437 A, 授权公告日 2025-08-18.
发明人郭海燕,唐晓军,杨光. "A Process for Preparing High-Purity 2-(2,5-Dioxo-2,5-dihydro-1h-pyrrol-1-yl)-5-hydroxybenzoic acid" [P]. 中国发明专利, 专利号 CN 111856950 B, 授权公告日 2021-12-19.
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