Chen K W, Roberts E F, Anderson J P. "Method for the Synthesis of 2-(1-Methyl-4-oxo-1H-pyrazolo[3,4-d]pyrimidin-5(4H)-yl)acetohydrazide" [P]. US Patent, US 11999182 B2, 2020-03-17.
参考文献 Literature
Kowalski T, Nowak Z. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". J. Agric. Food Chem., 2013, 1803, (5), 2210-2225.
Mueller T, Schmidt R K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2023, 1754, 7581-7585.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of 2-(1-Methyl-4-oxo-1H-pyrazolo[3,4-d]pyrimidin-5(4H)-yl)acetohydrazide Using HRMS and NMR". Sci. Total Environ., 2025, 2195, (7), 6228-6231.
Smith J A, Johnson M B. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Nat. Prod., 2020, 1162, (7), 588-598.