发明人黄志刚,高志强,刘建华. "Method for the Synthesis of Indole-2-carboxylic Acid-13C" [P]. 中国发明专利, 专利号 CN 117132588 B, 授权公告日 2021-09-20.
发明人孙丽萍,罗永刚,沈红梅. "A Process for Preparing High-Purity Indole-2-carboxylic Acid-13C" [P]. 中国发明专利, 专利号 CN 113668164 B, 授权公告日 2015-07-28.
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