发明人冯建国,何建平,郭海燕. "一种乌洛托品杂质2的合成方法" [P]. 中国发明专利, 专利号 CN 109415821 A, 授权公告日 2019-10-08.
发明人唐晓军,高志强,罗永刚. "Method for the Synthesis of Methenamine Impurity 2" [P]. 中国发明专利, 专利号 CN 117662684 A, 授权公告日 2024-08-06.
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