发明人张德明,周伟,马晓峰. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 112841245 A, 授权公告日 2019-11-08.
Chen K W, Lee S K, Yamamoto T. "Method for the Synthesis of 4-Hydroxy-1H-indole-3-carbonitrile" [P]. US Patent, US 10640235 B2, 2021-09-28.
Mueller T C, Jørgensen K, Sørensen M. "A Process for Preparing High-Purity 4-Hydroxy-1H-indole-3-carbonitrile" [P]. European Patent, EP 3632660 A1, 2018-03-28.
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