发明人李文辉,何建平,钱学锋. "一种甲氨蝶呤杂质N3的合成方法" [P]. 中国发明专利, 专利号 CN 110944895 A, 授权公告日 2025-06-05.
发明人赵玉洁,孙丽萍,周伟. "Method for the Synthesis of Methotrexate impurity N3" [P]. 中国发明专利, 专利号 CN 113141569 A, 授权公告日 2020-07-14.
发明人韩伟,徐明华,孙丽萍. "A Process for Preparing High-Purity Methotrexate impurity N3" [P]. 中国发明专利, 专利号 CN 110112575 B, 授权公告日 2017-01-08.
参考文献 Literature
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