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发明人张德明,唐晓军,何建平. "A Process for Preparing High-Purity 2-carboxy-1-(2-cyanoethyl)pyrrolidin-1-ium-1-olate" [P]. 中国发明专利, 专利号 CN 116598824 B, 授权公告日 2017-04-06.
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