发明人高志强,刘建华,赵玉洁. "一种4H-吡唑并[1,5-a]吲哚-2-羧酸的合成方法" [P]. 中国发明专利, 专利号 CN 111956254 A, 授权公告日 2016-07-04.
发明人高志强,钱学锋,罗永刚. "Method for the Synthesis of 4H-Pyrazolo[1,5-a]indole-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 111126313 A, 授权公告日 2021-02-24.
发明人胡光,林芳,李文辉. "A Process for Preparing High-Purity 4H-Pyrazolo[1,5-a]indole-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115505691 A, 授权公告日 2021-01-12.
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