发明人周伟,王建平,杨光. "Method for the Synthesis of 2-((4-Butyl-6-chloro-2-oxo-2h-chromen-7-yl)oxy)acetic acid" [P]. 中国发明专利, 专利号 CN 114123478 B, 授权公告日 2016-11-01.
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