发明人郭海燕,冯建国,沈红梅. "Method for the Synthesis of 5-(Thiophen-2-yl)pyrazolo[1,5-a]pyrimidine-7-carboxylic acid" [P]. 中国发明专利, 专利号 CN 112045876 A, 授权公告日 2023-02-17.
发明人钱学锋,黄志刚,朱建伟. "A Process for Preparing High-Purity 5-(Thiophen-2-yl)pyrazolo[1,5-a]pyrimidine-7-carboxylic acid" [P]. 中国发明专利, 专利号 CN 110694538 B, 授权公告日 2020-10-27.
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