发明人沈红梅,孙丽萍,郭海燕. "Method for the Synthesis of 1-Butyl-3,6-dimethyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108167080 B, 授权公告日 2018-11-25.
发明人冯建国,张德明,黄志刚. "A Process for Preparing High-Purity 1-Butyl-3,6-dimethyl-1H-pyrazolo[3,4-b]pyridine-4-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117840253 B, 授权公告日 2015-09-10.
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