Sørensen M, Martínez F, Björnsson E. "一种屈他维林杂质20的合成方法" [P]. European Patent, EP 3798717 A1, 2022-08-09.
Lee S K, Roberts E F, Park J H. "Method for the Synthesis of Drotaverine Impurity 20" [P]. US Patent, US 11108654 B2, 2023-08-09.
发明人马晓峰,孙丽萍,王建平. "A Process for Preparing High-Purity Drotaverine Impurity 20" [P]. 中国发明专利, 专利号 CN 111243339 A, 授权公告日 2022-05-05.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of 屈他维林杂质20 in Pharmaceutical Formulations". Chromatographia, 2014, 112, (10), 6156-6162.
Kowalski T, Nowak Z. "A Stability-Indicating HPLC Method for the Separation and Quantification of 屈他维林杂质20 as an Impurity". Talanta, 2014, 558, 7708-7726.
Kim S H, Park J Y. "Identification and Structural Characterization of a Novel Degradation Product of Drotaverine Impurity 20 Using HRMS and NMR". Sci. Total Environ., 2022, 416, (6), 3521-3527.