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发明人孙丽萍,周伟,沈红梅. "A Process for Preparing High-Purity Ethyl 7-chloro-5-ethylpyrazolo[1,5-a]pyrimidine-3-carboxylate" [P]. 中国发明专利, 专利号 CN 108955787 A, 授权公告日 2023-03-24.
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