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发明人赵玉洁,林芳,沈红梅. "Method for the Synthesis of Ethyl 2-bromo-5-chloro-7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-3-carboxylate" [P]. 中国发明专利, 专利号 CN 114544774 A, 授权公告日 2020-06-26.
发明人林芳,高志强,孙丽萍. "A Process for Preparing High-Purity Ethyl 2-bromo-5-chloro-7-oxo-4,7-dihydropyrazolo[1,5-a]pyrimidine-3-carboxylate" [P]. 中国发明专利, 专利号 CN 113324725 B, 授权公告日 2025-04-27.
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