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发明人郭海燕,胡光,张德明. "A Process for Preparing High-Purity 2-(2-Methyl-6-(methylamino)pyridin-3-yl)piperidine-1-carbaldehyde" [P]. 中国发明专利, 专利号 CN 113136538 B, 授权公告日 2021-09-08.
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