发明人郭海燕,沈红梅,唐晓军. "Method for the Synthesis of 1-Isopropyl-1H-indole-2,3-dione 3-[N-(3,4-dichlorophenyl)hydrazone]" [P]. 中国发明专利, 专利号 CN 117108822 A, 授权公告日 2016-09-12.
发明人冯建国,马晓峰,朱建伟. "A Process for Preparing High-Purity 1-Isopropyl-1H-indole-2,3-dione 3-[N-(3,4-dichlorophenyl)hydrazone]" [P]. 中国发明专利, 专利号 CN 112292103 A, 授权公告日 2020-04-05.
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