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发明人李文辉,郑宇鹏,郭海燕. "A Process for Preparing High-Purity N-Methyl-2-[2-(1-methylpiperidin-4-ylidene)hydrazin-1-yl]pyridine-3-sulfonamide" [P]. 中国发明专利, 专利号 CN 114900883 A, 授权公告日 2018-10-03.
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