发明人郑宇鹏,徐明华,黄志刚. "Method for the Synthesis of 4-Bromo-2-(tetrahydro-2H-pyran-2-yl)pyridazin-3(2H)-one" [P]. 中国发明专利, 专利号 CN 111690335 B, 授权公告日 2019-03-02.
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