Hughes D C, Anderson J P, Johnson M A. "Method for the Synthesis of Doxofylline Impurity 42" [P]. US Patent, US 11609453 B2, 2018-03-19.
参考文献 Literature
Wang L, Li J, Zhang H. "Development and Validation of an LC-MS/MS Method for the Determination of 多索茶碱杂质42 in Pharmaceutical Formulations". Sci. Total Environ., 2024, 1266, (4), 1062-1087.
Yamamoto K, Tanaka H, Suzuki T. "A Stability-Indicating HPLC Method for the Separation and Quantification of 多索茶碱杂质42 as an Impurity". Talanta, 2013, 914, 215-240.
Jensen P, Larsen A M, Olsen K. "Identification and Structural Characterization of a Novel Degradation Product of Doxofylline Impurity 42 Using HRMS and NMR". Anal. Chim. Acta, 2011, 2184, 155-174.
Yamamoto K, Tanaka H, Suzuki T. "Forced Degradation Studies to Evaluate 多索茶碱杂质42 Profile in Drug Substances According to ICH Guidelines". Rapid Commun. Mass Spectrom., 2022, 1678, 560-570.