Park J H, Lee S K, Davis P L. "一种的合成方法" [P]. US Patent, US 11985874 B2, 2022-12-15.
发明人张德明,王建平,钱学锋. "Method for the Synthesis of 1,1-Difluoro-5-azaspiro[2.4]heptane" [P]. 中国发明专利, 专利号 CN 113706277 B, 授权公告日 2022-09-05.
发明人朱建伟,钱学锋,沈红梅. "A Process for Preparing High-Purity 1,1-Difluoro-5-azaspiro[2.4]heptane" [P]. 中国发明专利, 专利号 CN 111222974 B, 授权公告日 2020-11-19.
参考文献 Literature
Xu M, Hu Y, Zhou D. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chem., 2020, 609, (10), 845-863.
Brown R C, Davis S M. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2022, 80, (7), 8506-8526.
Yang F, Sun W, Liu J. "Identification and Structural Characterization of a Novel Degradation Product of 1,1-Difluoro-5-azaspiro[2.4]heptane Using HRMS and NMR". Phytochemistry, 2015, 699, (5), 5966-5983.