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发明人刘建华,朱建伟,王建平. "Method for the Synthesis of 2-[4-(2,4-difluorophenyl)-4-methyl-2,5-dioxoimidazolidin-1-yl]acetic acid" [P]. 中国发明专利, 专利号 CN 114752949 A, 授权公告日 2015-03-22.
发明人黄志刚,张德明,赵玉洁. "A Process for Preparing High-Purity 2-[4-(2,4-difluorophenyl)-4-methyl-2,5-dioxoimidazolidin-1-yl]acetic acid" [P]. 中国发明专利, 专利号 CN 111841935 B, 授权公告日 2018-12-12.
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