Roberts E F, Brown S R, Kumar R. "Method for the Synthesis of (3R,4S)-4-(3,4-dimethoxyphenyl)pyrrolidine-3-carboxylic acid" [P]. US Patent, US 9495847 B2, 2017-02-01.
Davis P L, Brown S R, Klinger H. "A Process for Preparing High-Purity (3R,4S)-4-(3,4-dimethoxyphenyl)pyrrolidine-3-carboxylic acid" [P]. US Patent, US 11309517 B2, 2022-11-19.
参考文献 Literature
Xu M, Hu Y, Zhou D. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Sep. Sci., 2015, 1237, 888-897.
Yang F, Sun W, Liu J. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Nat. Prod., 2010, 2019, (9), 6651-6679.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of (3R,4S)-4-(3,4-dimethoxyphenyl)pyrrolidine-3-carboxylic acid Using HRMS and NMR". Chromatographia, 2020, 578, (4), 8466-8474.
Lee J H, Choi Y S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Agric. Food Chem., 2016, 1671, (5), 5321-5332.