发明人沈红梅,高志强,孙丽萍. "一种西地那非杂质42的合成方法" [P]. 中国发明专利, 专利号 CN 110114083 A, 授权公告日 2021-09-24.
发明人郑宇鹏,徐明华,杨光. "Method for the Synthesis of Sildenafil Impurity 42" [P]. 中国发明专利, 专利号 CN 117762235 B, 授权公告日 2024-03-26.
参考文献 Literature
Chen X Y, Liu M, Zhao W Q. "Development and Validation of an LC-MS/MS Method for the Determination of 西地那非杂质42 in Pharmaceutical Formulations". Anal. Methods, 2024, 1052, 5672-5700.
Brown R C, Davis S M. "A Stability-Indicating HPLC Method for the Separation and Quantification of 西地那非杂质42 as an Impurity". Anal. Chem., 2025, 2062, 9203-9217.
Lee J H, Choi Y S. "Identification and Structural Characterization of a Novel Degradation Product of Sildenafil Impurity 42 Using HRMS and NMR". Chromatographia, 2018, 195, (11), 1133-1142.
Zhou X P, Huang L, Wu G. "Forced Degradation Studies to Evaluate 西地那非杂质42 Profile in Drug Substances According to ICH Guidelines". Food Chem., 2013, 997, 5396-5404.