发明人张德明,韩伟,唐晓军. "一种的合成方法" [P]. 中国发明专利, 专利号 CN 109409921 A, 授权公告日 2025-07-10.
发明人罗永刚,黄志刚,杨光. "Method for the Synthesis of 4,4-Difluoro-1-oxa-9-azaspiro[5.5]Undecane hydrochloride" [P]. 中国发明专利, 专利号 CN 109143631 B, 授权公告日 2020-06-08.
Kumar R, Lee S K, Chen K W. "A Process for Preparing High-Purity 4,4-Difluoro-1-oxa-9-azaspiro[5.5]Undecane hydrochloride" [P]. US Patent, US 10632607 B2, 2024-01-01.
参考文献 Literature
Zhang Y, Li Q, Chen T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Rapid Commun. Mass Spectrom., 2024, 2011, (11), 1700-1708.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Environ. Sci. Technol., 2022, 659, 7119-7144.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of 4,4-Difluoro-1-oxa-9-azaspiro[5.5]Undecane hydrochloride Using HRMS and NMR". J. Agric. Food Chem., 2025, 2393, (5), 6055-6069.