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发明人郭海燕,张德明,杨光. "A Process for Preparing High-Purity 5-(2-Propoxyethyl)-1,2,4-oxadiazole-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117743242 B, 授权公告日 2019-11-19.
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