发明人朱建伟,冯建国,唐晓军. "Method for the Synthesis of N-Acetyl-S-(2-ethoxycarbonylethyl-1-methyl)-L-cysteine, Dicyclohexylammonium Salt" [P]. 中国发明专利, 专利号 CN 115661607 B, 授权公告日 2019-03-13.
发明人赵玉洁,高志强,沈红梅. "A Process for Preparing High-Purity N-Acetyl-S-(2-ethoxycarbonylethyl-1-methyl)-L-cysteine, Dicyclohexylammonium Salt" [P]. 中国发明专利, 专利号 CN 114886095 B, 授权公告日 2017-10-01.
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. Chromatogr. A, 2015, 1056, (3), 8588-8592.
O'Brien K, Kennedy M L. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Talanta, 2011, 620, 2003-2025.
Martinez C, Lopez D R. "Identification and Structural Characterization of a Novel Degradation Product of N-Acetyl-S-(2-ethoxycarbonylethyl-1-methyl)-L-cysteine, Dicyclohexylammonium Salt Using HRMS and NMR". J. Agric. Food Chem., 2013, 2355, 7363-7381.
Kumar A, Sharma P, Patel R S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Chem., 2021, 1071, (5), 4494-4517.