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发明人何建平,张德明,刘建华. "Method for the Synthesis of 39079-62-4
4-oxidanylidenechromene-3-carboxylate
4-oxo-1-benzopyran-3-carboxylate
A824399" [P]. 中国发明专利, 专利号 CN 114050905 B, 授权公告日 2019-11-21.
发明人孙丽萍,周伟,唐晓军. "A Process for Preparing High-Purity 39079-62-4
4-oxidanylidenechromene-3-carboxylate
4-oxo-1-benzopyran-3-carboxylate
A824399" [P]. 中国发明专利, 专利号 CN 113552507 B, 授权公告日 2023-09-09.
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