发明人罗永刚,沈红梅,钱学锋. "Method for the Synthesis of 1-Ethyl-5-methoxy-2-methyl-1h-indole-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 114469034 B, 授权公告日 2017-02-25.
发明人黄志刚,朱建伟,何建平. "A Process for Preparing High-Purity 1-Ethyl-5-methoxy-2-methyl-1h-indole-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117541971 A, 授权公告日 2020-03-18.
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