发明人李文辉,罗永刚,黄志刚. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 116213140 A, 授权公告日 2021-03-12.
发明人马晓峰,王建平,朱建伟. "Method for the Synthesis of methyl 1-ethylindole-4-carboxylate" [P]. 中国发明专利, 专利号 CN 113698406 A, 授权公告日 2017-09-23.
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