发明人唐晓军,罗永刚,周伟. "Method for the Synthesis of 4-[(4-Chlorophenyl)amino]-2-(dimethylamino)-6-oxo-6H-1,3-oxazine-5-carbonitrile" [P]. 中国发明专利, 专利号 CN 108531832 B, 授权公告日 2018-03-02.
发明人孙丽萍,沈红梅,刘建华. "A Process for Preparing High-Purity 4-[(4-Chlorophenyl)amino]-2-(dimethylamino)-6-oxo-6H-1,3-oxazine-5-carbonitrile" [P]. 中国发明专利, 专利号 CN 112157645 A, 授权公告日 2021-03-20.
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