发明人冯建国,韩伟,唐晓军. "一种乙胺嘧啶杂质2的合成方法" [P]. 中国发明专利, 专利号 CN 111656877 A, 授权公告日 2025-12-25.
发明人赵玉洁,郭海燕,杨光. "Method for the Synthesis of Pyrimethamine EP Impurity A" [P]. 中国发明专利, 专利号 CN 113842385 B, 授权公告日 2022-07-24.
发明人杨光,赵玉洁,高志强. "A Process for Preparing High-Purity Pyrimethamine EP Impurity A" [P]. 中国发明专利, 专利号 CN 117347559 A, 授权公告日 2020-10-19.
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