发明人杨光,孙丽萍,朱建伟. "Method for the Synthesis of 2-(5-Ethyl-2-oxo-2,3-dihydro-1h-indol-3-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 110026089 A, 授权公告日 2018-09-20.
发明人高志强,韩伟,李文辉. "A Process for Preparing High-Purity 2-(5-Ethyl-2-oxo-2,3-dihydro-1h-indol-3-yl)acetic acid" [P]. 中国发明专利, 专利号 CN 108011287 B, 授权公告日 2021-06-07.
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