Klinger H, Roberts E F, Mueller T. "Method for the Synthesis of 2-((6-Chloro-4-ethyl-2-oxo-2h-chromen-7-yl)oxy)propanoic acid" [P]. US Patent, US 9153533 B2, 2017-08-09.
发明人李文辉,陈志强,徐明华. "A Process for Preparing High-Purity 2-((6-Chloro-4-ethyl-2-oxo-2h-chromen-7-yl)oxy)propanoic acid" [P]. 中国发明专利, 专利号 CN 110166789 A, 授权公告日 2017-04-07.
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