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发明人何建平,钱学锋,孙丽萍. "A Process for Preparing High-Purity 3-Ethyl-1-(2-hydroxyethyl)-1H-pyrazol-5(4H)-one" [P]. 中国发明专利, 专利号 CN 111242332 A, 授权公告日 2025-05-03.
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