发明人郑宇鹏,唐晓军,徐明华. "Method for the Synthesis of 2-({4-methyl-6-oxo-6h,7h,8h,9h,10h-cyclohexa[c]chromen-3-yl}oxy)acetic acid" [P]. 中国发明专利, 专利号 CN 109301878 A, 授权公告日 2019-05-18.
发明人黄志刚,沈红梅,林芳. "A Process for Preparing High-Purity 2-({4-methyl-6-oxo-6h,7h,8h,9h,10h-cyclohexa[c]chromen-3-yl}oxy)acetic acid" [P]. 中国发明专利, 专利号 CN 113398986 B, 授权公告日 2022-08-26.
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