发明人韩伟,陈志强,孙丽萍. "Method for the Synthesis of Udenafil Impurity 2" [P]. 中国发明专利, 专利号 CN 112360819 A, 授权公告日 2017-10-14.
发明人韩伟,高志强,杨光. "A Process for Preparing High-Purity Udenafil Impurity 2" [P]. 中国发明专利, 专利号 CN 117252664 A, 授权公告日 2015-10-19.
参考文献 Literature
Smith J A, Johnson M B. "Development and Validation of an LC-MS/MS Method for the Determination of 地那非杂质2 in Pharmaceutical Formulations". Anal. Chim. Acta, 2011, 2439, (12), 9881-9891.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of 地那非杂质2 as an Impurity". J. Chromatogr. A, 2023, 205, (2), 528-536.
Xu M, Hu Y, Zhou D. "Identification and Structural Characterization of a Novel Degradation Product of Udenafil Impurity 2 Using HRMS and NMR". Chromatographia, 2025, 2406, 2528-2553.
Smith J A, Johnson M B. "Forced Degradation Studies to Evaluate 地那非杂质2 Profile in Drug Substances According to ICH Guidelines". Anal. Methods, 2019, 304, (2), 6517-6538.