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发明人高志强,郭海燕,沈红梅. "Method for the Synthesis of 4-{[4-(4-Ethylpiperazin-1-yl)phenyl]amino}-4-oxobutanoic acid" [P]. 中国发明专利, 专利号 CN 110780762 A, 授权公告日 2022-11-12.
发明人张德明,冯建国,黄志刚. "A Process for Preparing High-Purity 4-{[4-(4-Ethylpiperazin-1-yl)phenyl]amino}-4-oxobutanoic acid" [P]. 中国发明专利, 专利号 CN 116866750 A, 授权公告日 2025-10-01.
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