发明人王建平,张德明,孙丽萍. "Method for the Synthesis of 1-(2-Oxo-2-(3-oxopyrazolidin-1-yl)ethyl)pyridin-1-ium chloride" [P]. 中国发明专利, 专利号 CN 112405346 A, 授权公告日 2019-08-17.
发明人徐明华,沈红梅,冯建国. "A Process for Preparing High-Purity 1-(2-Oxo-2-(3-oxopyrazolidin-1-yl)ethyl)pyridin-1-ium chloride" [P]. 中国发明专利, 专利号 CN 115851222 A, 授权公告日 2021-02-20.
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