发明人刘建华,钱学锋,郑宇鹏. "Method for the Synthesis of 6-Chloro-3-[(dimethylamino)methylidene]-2,3-dihydro-1h-indol-2-one" [P]. 中国发明专利, 专利号 CN 111234069 A, 授权公告日 2022-09-15.
发明人朱建伟,冯建国,孙丽萍. "A Process for Preparing High-Purity 6-Chloro-3-[(dimethylamino)methylidene]-2,3-dihydro-1h-indol-2-one" [P]. 中国发明专利, 专利号 CN 117411614 A, 授权公告日 2018-12-08.
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