发明人钱学锋,张德明,徐明华. "Method for the Synthesis of 5-Ethyl-4-oxo-2-phenyl-4,5-dihydropyrazolo[1,5-a]pyrazine-3-carbaldehyde" [P]. 中国发明专利, 专利号 CN 114203757 A, 授权公告日 2017-06-16.
发明人罗永刚,韩伟,郭海燕. "A Process for Preparing High-Purity 5-Ethyl-4-oxo-2-phenyl-4,5-dihydropyrazolo[1,5-a]pyrazine-3-carbaldehyde" [P]. 中国发明专利, 专利号 CN 109918560 B, 授权公告日 2019-06-07.
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