发明人郭海燕,朱建伟,何建平. "Method for the Synthesis of 4-methoxycarbonyl-3-methyl-1H-pyrazolo[3,4-b]pyridine-6-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109890265 B, 授权公告日 2025-05-19.
发明人杨光,刘建华,高志强. "A Process for Preparing High-Purity 4-methoxycarbonyl-3-methyl-1H-pyrazolo[3,4-b]pyridine-6-carboxylic acid" [P]. 中国发明专利, 专利号 CN 111601818 A, 授权公告日 2020-06-19.
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