发明人赵玉洁,郑宇鹏,林芳. "Method for the Synthesis of 4-Nitro-1H-indazol-3-ol" [P]. 中国发明专利, 专利号 CN 110042741 B, 授权公告日 2024-01-12.
发明人郭海燕,孙丽萍,何建平. "A Process for Preparing High-Purity 4-Nitro-1H-indazol-3-ol" [P]. 中国发明专利, 专利号 CN 109642957 A, 授权公告日 2016-11-15.
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