Mueller T C, Rossi M, Jørgensen K. "一种的合成方法" [P]. European Patent, EP 3805606 A1, 2019-01-02.
发明人王建平,陈志强,张德明. "Method for the Synthesis of 7-Ethyl Theophylline" [P]. 中国发明专利, 专利号 CN 108391650 B, 授权公告日 2021-11-19.
Stevens L M, Park J H, Schröder R. "A Process for Preparing High-Purity 7-Ethyl Theophylline" [P]. US Patent, US 10776630 B2, 2020-07-10.
参考文献 Literature
Kowalski T, Nowak Z. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Methods, 2019, 1851, 8853-8872.
Kumar A, Sharma P, Patel R S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Food Chem., 2024, 541, (5), 1440-1469.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of 7-Ethyl Theophylline Using HRMS and NMR". Anal. Chem., 2022, 1821, 6698-6705.