Lefèvre J P, Sørensen M, Johansson L. "Method for the Synthesis of 6,9-Dioxa-1,3-diazaspiro[4.4]nonane" [P]. European Patent, EP 3939653 A1, 2022-02-05.
Park J H, Schröder R, Klinger H. "A Process for Preparing High-Purity 6,9-Dioxa-1,3-diazaspiro[4.4]nonane" [P]. US Patent, US 9313194 B2, 2016-01-07.
参考文献 Literature
Hughes D, Roberts J, Thomas A. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2024, 1836, (4), 9888-9906.
Jensen P, Larsen A M, Olsen K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Agric. Food Chem., 2019, 1045, (5), 8926-8935.