Roberts E F, Yamamoto T, Hughes D C. "一种的合成方法" [P]. US Patent, US 11442485 B2, 2020-12-06.
Yamamoto T, Chen K W, Mueller T. "Method for the Synthesis of 2-(o-Tolyl)-2H-pyrazolo[3,4-d]pyridazin-7(6H)-one" [P]. US Patent, US 9330754 B2, 2019-06-08.
Kowalski A, Sørensen M, Johansson L. "A Process for Preparing High-Purity 2-(o-Tolyl)-2H-pyrazolo[3,4-d]pyridazin-7(6H)-one" [P]. European Patent, EP 3267670 A1, 2025-04-09.
参考文献 Literature
O'Brien K, Kennedy M L. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Molecules, 2022, 2478, 5603-5627.
Hughes D, Roberts J, Thomas A. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2012, 2075, (11), 7890-7903.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of 2-(o-Tolyl)-2H-pyrazolo[3,4-d]pyridazin-7(6H)-one Using HRMS and NMR". J. Chromatogr. A, 2020, 365, 9978-9984.
Hughes D, Roberts J, Thomas A. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Nat. Prod., 2018, 1621, 8059-8086.