Williams B T, Fischer A B, Klinger H. "Method for the Synthesis of 6-(trifluoromethyl)-1H-pyrazolo[3,4-d]pyrimidin-4-ol" [P]. US Patent, US 9829407 B2, 2020-06-01.
Johnson M A, Chen K W, Fischer A B. "A Process for Preparing High-Purity 6-(trifluoromethyl)-1H-pyrazolo[3,4-d]pyrimidin-4-ol" [P]. US Patent, US 9250533 B2, 2019-01-25.
参考文献 Literature
Garcia M, Rodriguez P. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chem., 2020, 364, 8049-8079.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Nat. Prod., 2015, 1006, (6), 9005-9013.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of 6-(trifluoromethyl)-1H-pyrazolo[3,4-d]pyrimidin-4-ol Using HRMS and NMR". Anal. Chim. Acta, 2023, 465, (11), 1433-1463.
O'Brien K, Kennedy M L. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Molecules, 2019, 1356, 3236-3241.