Björnsson E, Schröder R, Rossi M. "一种的合成方法" [P]. European Patent, EP 3720919 A1, 2017-10-25.
Roberts E F, Johnson M A, Klinger H. "Method for the Synthesis of 4-Isopropyl-1-oxa-4,9-diazaspiro[5.5]undecan-3-one" [P]. US Patent, US 9498994 B2, 2020-07-13.
Kowalski A, Martínez F, Johansson L. "A Process for Preparing High-Purity 4-Isopropyl-1-oxa-4,9-diazaspiro[5.5]undecan-3-one" [P]. European Patent, EP 3316119 A1, 2023-10-09.
参考文献 Literature
Kim S H, Park J Y. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Chromatogr. A, 2014, 658, (9), 5711-5735.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Talanta, 2010, 299, (4), 2716-2731.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of 4-Isopropyl-1-oxa-4,9-diazaspiro[5.5]undecan-3-one Using HRMS and NMR". J. Pharm. Biomed. Anal., 2018, 2306, (8), 9405-9434.
Mueller T, Schmidt R K. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Sep. Sci., 2025, 193, 2058-2067.