发明人张德明,徐明华,孙丽萍. "Method for the Synthesis of 2-Amino-5-ethyl-4-oxo-4,5-dihydro-1h-pyrrole-3-carbonitrile" [P]. 中国发明专利, 专利号 CN 114178957 A, 授权公告日 2024-02-22.
发明人林芳,高志强,王建平. "A Process for Preparing High-Purity 2-Amino-5-ethyl-4-oxo-4,5-dihydro-1h-pyrrole-3-carbonitrile" [P]. 中国发明专利, 专利号 CN 108700716 B, 授权公告日 2020-05-24.
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