Lee S K, O'Brien P Q, Patel M V. "一种N/A的合成方法" [P]. US Patent, US 9903322 B2, 2020-05-22.
Thompson G K, Brown S R, Davis P L. "Method for the Synthesis of (2S,4R)-4-Amino-1-methylpyrrolidine-2-carboxylic acid dihydrochloride" [P]. US Patent, US 11880281 B2, 2020-08-07.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of N/A in Pharmaceutical Formulations". Talanta, 2018, 501, (3), 1537-1557.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of N/A as an Impurity". Chemosphere, 2010, 1412, (12), 1570-1590.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of (2S,4R)-4-Amino-1-methylpyrrolidine-2-carboxylic acid dihydrochloride Using HRMS and NMR". J. Nat. Prod., 2013, 1085, 7632-7641.
Kowalski T, Nowak Z. "Forced Degradation Studies to Evaluate N/A Profile in Drug Substances According to ICH Guidelines". Environ. Sci. Technol., 2019, 1159, (9), 1431-1452.