Patel M V, Hughes D C, Klinger H. "Method for the Synthesis of Methyl 2-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-4-yl)acetate" [P]. US Patent, US 11984076 B2, 2025-01-18.
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. Sep. Sci., 2011, 1977, 7468-7481.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Talanta, 2012, 1149, 1356-1365.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of Methyl 2-(3-methyl-5-oxo-4,5-dihydro-1H-pyrazol-4-yl)acetate Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2021, 1603, (8), 1853-1872.
Yamamoto K, Tanaka H, Suzuki T. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Anal. Methods, 2012, 1623, (10), 5635-5645.