Nowak P, Schröder R, Mueller T C. "Method for the Synthesis of tert-Butyl 3-formyl-6-methoxy-1H-indazole-1-carboxylate" [P]. European Patent, EP 3531262 A1, 2025-09-17.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Sep. Sci., 2015, 2173, (3), 5791-5801.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Methods, 2010, 660, (10), 6794-6804.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of tert-Butyl 3-formyl-6-methoxy-1H-indazole-1-carboxylate Using HRMS and NMR". Anal. Chem., 2024, 2451, 4689-4715.
Mueller T, Schmidt R K. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Biomed. Chromatogr., 2021, 2312, (7), 2457-2478.