Park J H, Klinger H, Mueller T. "一种的合成方法" [P]. US Patent, US 10077135 B2, 2016-10-21.
Chen K W, Hughes D C, Davis P L. "Method for the Synthesis of 5-Hydroxy-2-methyl-1H-pyrazolo[3,4-d]pyrimidine-4,6(2H,5H)-dione" [P]. US Patent, US 9056752 B2, 2023-01-08.
参考文献 Literature
Kumar A, Sharma P, Patel R S. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Talanta, 2024, 328, (7), 3527-3531.
Brown R C, Davis S M. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2024, 521, (12), 7945-7968.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of 5-Hydroxy-2-methyl-1H-pyrazolo[3,4-d]pyrimidine-4,6(2H,5H)-dione Using HRMS and NMR". J. Sep. Sci., 2022, 857, (3), 1988-2005.