发明人徐明华,郭海燕,赵玉洁. "一种4-甲氧基吲哚-2-甲酸的合成方法" [P]. 中国发明专利, 专利号 CN 109788869 A, 授权公告日 2021-05-18.
发明人冯建国,罗永刚,高志强. "Method for the Synthesis of 4-Methoxyindole-2-carboxylic Acid" [P]. 中国发明专利, 专利号 CN 114200061 A, 授权公告日 2021-10-06.
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