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发明人徐明华,张德明,郭海燕. "Method for the Synthesis of 6-Chloro-5-methyl-2-(methylthio)-7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 112918300 A, 授权公告日 2024-11-26.
发明人罗永刚,朱建伟,冯建国. "A Process for Preparing High-Purity 6-Chloro-5-methyl-2-(methylthio)-7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 113371401 A, 授权公告日 2024-06-18.
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