Kowalski A, Mueller T C, Nielsen H. "Method for the Synthesis of 2-Acetyl-5-methyl-1H-indazol-3(2H)-one" [P]. European Patent, EP 3308874 A1, 2019-11-09.
Mueller T, Stevens L M, Lee S K. "A Process for Preparing High-Purity 2-Acetyl-5-methyl-1H-indazol-3(2H)-one" [P]. US Patent, US 10560084 B2, 2025-07-03.
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., 2014, 2110, (4), 6585-6606.
Chen X Y, Liu M, Zhao W Q. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chemosphere, 2019, 1673, (2), 7878-7906.
O'Brien K, Kennedy M L. "Identification and Structural Characterization of a Novel Degradation Product of 2-Acetyl-5-methyl-1H-indazol-3(2H)-one Using HRMS and NMR". Phytochemistry, 2023, 1477, (1), 9024-9036.