发明人赵玉洁,徐明华,刘建华. "Method for the Synthesis of Ethyl 2-methyl-5-oxopyrazolidine-3-carboxylate" [P]. 中国发明专利, 专利号 CN 109671162 A, 授权公告日 2019-12-17.
Kowalski A, Schröder R, Johansson L. "A Process for Preparing High-Purity Ethyl 2-methyl-5-oxopyrazolidine-3-carboxylate" [P]. European Patent, EP 3978470 A1, 2024-06-17.
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