发明人赵玉洁,郑宇鹏,冯建国. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 114563031 A, 授权公告日 2020-12-03.
发明人黄志刚,胡光,罗永刚. "Method for the Synthesis of 3-((2-Hydroxy-4-nitrophenyl)amino)pyrazine-2,5-dicarbonitrile" [P]. 中国发明专利, 专利号 CN 108225816 A, 授权公告日 2015-08-10.
Schröder R, Park J H, Yamamoto T. "A Process for Preparing High-Purity 3-((2-Hydroxy-4-nitrophenyl)amino)pyrazine-2,5-dicarbonitrile" [P]. US Patent, US 9254875 B2, 2024-10-05.
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