发明人王建平,朱建伟,马晓峰. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 113475550 A, 授权公告日 2023-06-15.
Kumar R, Anderson J P, Yamamoto T. "Method for the Synthesis of Methyl 2-{2-butyl-4-oxo-1,3-diazaspiro[4.4]non-1-en-3-yl}acetate" [P]. US Patent, US 9747663 B2, 2021-11-06.
发明人罗永刚,徐明华,马晓峰. "A Process for Preparing High-Purity Methyl 2-{2-butyl-4-oxo-1,3-diazaspiro[4.4]non-1-en-3-yl}acetate" [P]. 中国发明专利, 专利号 CN 114829873 A, 授权公告日 2024-04-08.
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