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发明人张德明,马晓峰,唐晓军. "A Process for Preparing High-Purity tert-Butyl 3,4-dihydropyrido[2,3-b]pyrazine-1(2H)-carboxylate" [P]. 中国发明专利, 专利号 CN 109135468 A, 授权公告日 2020-08-01.
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