Lefèvre J P, Sørensen M, Jørgensen K. "Method for the Synthesis of (3R)-1,7-dithia-4-azaspiro[4.4]Nonane-3-carboxylic acid" [P]. European Patent, EP 3477174 A1, 2015-04-28.
Thompson G K, Klinger H, Park J H. "A Process for Preparing High-Purity (3R)-1,7-dithia-4-azaspiro[4.4]Nonane-3-carboxylic acid" [P]. US Patent, US 11121622 B2, 2021-02-19.
参考文献 Literature
Garcia M, Rodriguez P. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Chemosphere, 2015, 1118, (2), 3854-3884.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2011, 2119, 1529-1537.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of (3R)-1,7-dithia-4-azaspiro[4.4]Nonane-3-carboxylic acid Using HRMS and NMR". J. Pharm. Biomed. Anal., 2013, 984, (11), 4318-4327.
Kowalski T, Nowak Z. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2017, 749, (5), 5206-5233.