发明人李文辉,林芳,钱学锋. "一种茶碱杂质29的合成方法" [P]. 中国发明专利, 专利号 CN 111100022 A, 授权公告日 2016-12-14.
发明人赵玉洁,徐明华,李文辉. "Method for the Synthesis of Istradefylline Impurity 29" [P]. 中国发明专利, 专利号 CN 114369183 B, 授权公告日 2022-03-13.
发明人郑宇鹏,王建平,罗永刚. "A Process for Preparing High-Purity Istradefylline Impurity 29" [P]. 中国发明专利, 专利号 CN 111066359 A, 授权公告日 2025-06-19.
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