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发明人张德明,唐晓军,何建平. "A Process for Preparing High-Purity 2-(2-(2-((1-(4,4-Dimethyl-2,6-dioxocyclohexylidene)ethyl)amino)ethoxy)ethoxy)acetic acid" [P]. 中国发明专利, 专利号 CN 113589375 A, 授权公告日 2019-06-27.
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