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发明人钱学锋,沈红梅,罗永刚. "Method for the Synthesis of Ethyl 3-methyl-4-oxo-4,5,6,7-tetrahydro-1h-indole-2-carboxylate" [P]. 中国发明专利, 专利号 CN 115951100 B, 授权公告日 2017-08-15.
发明人孙丽萍,朱建伟,王建平. "A Process for Preparing High-Purity Ethyl 3-methyl-4-oxo-4,5,6,7-tetrahydro-1h-indole-2-carboxylate" [P]. 中国发明专利, 专利号 CN 115302208 A, 授权公告日 2023-02-02.
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