Patel M V, Chen K W, Anderson J P. "一种奈福泮杂质33的合成方法" [P]. US Patent, US 10021236 B2, 2022-06-27.
发明人张德明,林芳,黄志刚. "Method for the Synthesis of Nefopam Impurity 33" [P]. 中国发明专利, 专利号 CN 112177295 A, 授权公告日 2021-07-04.
发明人郑宇鹏,孙丽萍,周伟. "A Process for Preparing High-Purity Nefopam Impurity 33" [P]. 中国发明专利, 专利号 CN 112045724 B, 授权公告日 2025-07-06.
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