Martínez F, Mueller T C, Rossi M. "Method for the Synthesis of 5-(Carboxymethyl)-4-oxo-5,6,7,8-tetrahydro-4H-pyrazolo[1,5-a][1,4]diazepine-2-carboxylic acid" [P]. European Patent, EP 3939873 A1, 2023-11-05.
发明人李文辉,黄志刚,徐明华. "A Process for Preparing High-Purity 5-(Carboxymethyl)-4-oxo-5,6,7,8-tetrahydro-4H-pyrazolo[1,5-a][1,4]diazepine-2-carboxylic acid" [P]. 中国发明专利, 专利号 CN 115562442 B, 授权公告日 2020-07-26.
参考文献 Literature
Lee J H, Choi Y S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2025, 1668, 3615-3643.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Biomed. Chromatogr., 2022, 1461, (4), 6772-6801.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of 5-(Carboxymethyl)-4-oxo-5,6,7,8-tetrahydro-4H-pyrazolo[1,5-a][1,4]diazepine-2-carboxylic acid Using HRMS and NMR". J. Sep. Sci., 2013, 2183, 154-161.
Martinez C, Lopez D R. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Environ. Sci. Technol., 2010, 1675, (2), 5890-5902.