发明人郭海燕,周伟,高志强. "一种N/A的合成方法" [P]. 中国发明专利, 专利号 CN 117131310 A, 授权公告日 2017-01-03.
发明人胡光,冯建国,郑宇鹏. "Method for the Synthesis of tert-Butyl 2-(ethyl-13C2)-2-hydroxypyrrolidine-1-carboxylate" [P]. 中国发明专利, 专利号 CN 115124205 B, 授权公告日 2021-09-08.
Fischer A B, Klinger H, Anderson J P. "A Process for Preparing High-Purity tert-Butyl 2-(ethyl-13C2)-2-hydroxypyrrolidine-1-carboxylate" [P]. US Patent, US 9677967 B2, 2021-05-12.
参考文献 Literature
Jensen P, Larsen A M, Olsen K. "Development and Validation of an LC-MS/MS Method for the Determination of N/A in Pharmaceutical Formulations". Talanta, 2024, 1897, (3), 2663-2681.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of N/A as an Impurity". Anal. Chim. Acta, 2017, 1664, 1475-1500.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of tert-Butyl 2-(ethyl-13C2)-2-hydroxypyrrolidine-1-carboxylate Using HRMS and NMR". Phytochemistry, 2025, 1639, (10), 5207-5222.
Hughes D, Roberts J, Thomas A. "Forced Degradation Studies to Evaluate N/A Profile in Drug Substances According to ICH Guidelines". Sci. Total Environ., 2021, 1011, (4), 9945-9964.