发明人何建平,李文辉,罗永刚. "Method for the Synthesis of 5-(Ethylsulfonyl)-4-(3-nitrophenyl)-2-thioxo-1,2-dihydropyridine-3-carbonitrile" [P]. 中国发明专利, 专利号 CN 109869802 A, 授权公告日 2022-07-24.
发明人韩伟,罗永刚,刘建华. "A Process for Preparing High-Purity 5-(Ethylsulfonyl)-4-(3-nitrophenyl)-2-thioxo-1,2-dihydropyridine-3-carbonitrile" [P]. 中国发明专利, 专利号 CN 117225717 A, 授权公告日 2019-07-24.
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