发明人沈红梅,冯建国,林芳. "一种苯佐那酯杂质4的合成方法" [P]. 中国发明专利, 专利号 CN 111157736 A, 授权公告日 2016-01-19.
发明人冯建国,张德明,唐晓军. "Method for the Synthesis of Benzonatate Impurity 4" [P]. 中国发明专利, 专利号 CN 108769489 A, 授权公告日 2017-12-02.
参考文献 Literature
Xu M, Hu Y, Zhou D. "Development and Validation of an LC-MS/MS Method for the Determination of 苯佐那酯杂质4 in Pharmaceutical Formulations". Talanta, 2014, 1807, (3), 9770-9796.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of 苯佐那酯杂质4 as an Impurity". Biomed. Chromatogr., 2025, 407, 7996-8005.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of Benzonatate Impurity 4 Using HRMS and NMR". Rapid Commun. Mass Spectrom., 2012, 1972, (10), 7178-7182.