发明人张德明,韩伟,李文辉. "Method for the Synthesis of Azathioprine Impurity 18" [P]. 中国发明专利, 专利号 CN 109104272 A, 授权公告日 2016-02-07.
发明人赵玉洁,钱学锋,朱建伟. "A Process for Preparing High-Purity Azathioprine Impurity 18" [P]. 中国发明专利, 专利号 CN 116137172 B, 授权公告日 2023-11-25.
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