发明人何建平,王建平,张德明. "Method for the Synthesis of 5-Cyano-1H-indole-6-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117286371 B, 授权公告日 2016-12-08.
发明人杨光,郑宇鹏,赵玉洁. "A Process for Preparing High-Purity 5-Cyano-1H-indole-6-carboxylic acid" [P]. 中国发明专利, 专利号 CN 108214835 B, 授权公告日 2022-10-05.
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