Williams B T, Patel M V, Fischer A B. "Method for the Synthesis of Benzyl 2-ethyl-4-hydroxy-5H-pyrrolo[3,4-d]pyrimidine-6(7H)-carboxylate" [P]. US Patent, US 9115743 B2, 2018-01-23.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2017, 1658, (7), 3518-3548.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". J. Sep. Sci., 2013, 804, (10), 5828-5848.
Hughes D, Roberts J, Thomas A. "Identification and Structural Characterization of a Novel Degradation Product of Benzyl 2-ethyl-4-hydroxy-5H-pyrrolo[3,4-d]pyrimidine-6(7H)-carboxylate Using HRMS and NMR". J. Nat. Prod., 2012, 856, (11), 1677-1701.
Xu M, Hu Y, Zhou D. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Pharm. Biomed. Anal., 2011, 1661, 5730-5755.