Martínez F, Johansson L, Jørgensen K. "一种的合成方法" [P]. European Patent, EP 3259407 A1, 2017-08-17.
发明人沈红梅,郑宇鹏,钱学锋. "Method for the Synthesis of 8-Ethyl-4-(4-methoxybenzoyl)-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 109477883 B, 授权公告日 2020-09-18.
发明人王建平,周伟,陈志强. "A Process for Preparing High-Purity 8-Ethyl-4-(4-methoxybenzoyl)-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid" [P]. 中国发明专利, 专利号 CN 114505156 B, 授权公告日 2017-03-09.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Food Chem., 2013, 2439, 126-137.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2017, 1217, 7332-7356.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of 8-Ethyl-4-(4-methoxybenzoyl)-1-oxa-4,8-diazaspiro[4.5]decane-3-carboxylic acid Using HRMS and NMR". Chromatographia, 2018, 84, (4), 113-136.