Sørensen M, Lefèvre J P, Nielsen H. "一种的合成方法" [P]. European Patent, EP 3835989 A1, 2023-12-14.
Lefèvre J P, Mueller T C, Johansson L. "Method for the Synthesis of 4-(2,4-Difluorobenzoyl)-8-propyl-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. European Patent, EP 3409196 A1, 2015-05-25.
发明人钱学锋,郭海燕,张德明. "A Process for Preparing High-Purity 4-(2,4-Difluorobenzoyl)-8-propyl-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 117250459 B, 授权公告日 2018-03-19.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2021, 865, (4), 9116-9128.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2014, 2042, (10), 3437-3440.
Chen X Y, Liu M, Zhao W Q. "Identification and Structural Characterization of a Novel Degradation Product of 4-(2,4-Difluorobenzoyl)-8-propyl-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid Using HRMS and NMR". Anal. Methods, 2018, 1117, (12), 6855-6881.