发明人唐晓军,何建平,孙丽萍. "Method for the Synthesis of 2-[(4-Ethyl-7-methyl-2-oxo-2H-chromen-5-yl)oxy]-propanoic acid" [P]. 中国发明专利, 专利号 CN 109054923 B, 授权公告日 2016-07-18.
发明人张德明,周伟,黄志刚. "A Process for Preparing High-Purity 2-[(4-Ethyl-7-methyl-2-oxo-2H-chromen-5-yl)oxy]-propanoic acid" [P]. 中国发明专利, 专利号 CN 115921779 B, 授权公告日 2015-09-16.
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