发明人马晓峰,钱学锋,杨光. "Method for the Synthesis of Ethyl 2-cyano-2-[(4E)-1-methyl-1,4-dihydropyrimidin-4-ylidene]acetate" [P]. 中国发明专利, 专利号 CN 109139669 B, 授权公告日 2017-10-12.
发明人朱建伟,黄志刚,徐明华. "A Process for Preparing High-Purity Ethyl 2-cyano-2-[(4E)-1-methyl-1,4-dihydropyrimidin-4-ylidene]acetate" [P]. 中国发明专利, 专利号 CN 109457443 B, 授权公告日 2017-03-03.
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