发明人李文辉,徐明华,王建平. "Method for the Synthesis of N-Nitroso Pseudoephedrine (N-Nitroso Ephedrine HCl EP Impurity B)" [P]. 中国发明专利, 专利号 CN 109757518 B, 授权公告日 2016-07-19.
发明人郑宇鹏,马晓峰,郭海燕. "A Process for Preparing High-Purity N-Nitroso Pseudoephedrine (N-Nitroso Ephedrine HCl EP Impurity B)" [P]. 中国发明专利, 专利号 CN 112514700 B, 授权公告日 2019-07-11.
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