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发明人孙丽萍,赵玉洁,罗永刚. "A Process for Preparing High-Purity 3-Methyl-1-(4-methylphenyl)piperazine Dihydrochloride hydrate" [P]. 中国发明专利, 专利号 CN 115937198 A, 授权公告日 2018-09-15.
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