Williams B T, Chen K W, Anderson J P. "Method for the Synthesis of 2-Azaspiro[3.3]heptane oxalate(2:1)" [P]. US Patent, US 10714445 B2, 2019-02-13.
Thompson G K, Anderson J P, Brown S R. "A Process for Preparing High-Purity 2-Azaspiro[3.3]heptane oxalate(2:1)" [P]. US Patent, US 11366629 B2, 2021-12-03.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Talanta, 2023, 1223, 7241-7261.
Yang F, Sun W, Liu J. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2017, 90, (4), 2506-2533.
Zhou X P, Huang L, Wu G. "Identification and Structural Characterization of a Novel Degradation Product of 2-Azaspiro[3.3]heptane oxalate(2:1) Using HRMS and NMR". J. Agric. Food Chem., 2024, 1850, (5), 8577-8596.
Zhang Y, Li Q, Chen T. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Sci. Total Environ., 2020, 1011, (9), 333-357.