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发明人张德明,周伟,胡光. "Method for the Synthesis of 1-(2,4-Difluorophenyl)-3-(1-ethyl-1H-indol-3-yl)urea" [P]. 中国发明专利, 专利号 CN 108290339 A, 授权公告日 2024-04-15.
发明人孙丽萍,沈红梅,何建平. "A Process for Preparing High-Purity 1-(2,4-Difluorophenyl)-3-(1-ethyl-1H-indol-3-yl)urea" [P]. 中国发明专利, 专利号 CN 112382795 B, 授权公告日 2023-06-11.
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