Davis P L, Schröder R, Yamamoto T. "一种N/A的合成方法" [P]. US Patent, US 10342451 B2, 2025-12-28.
发明人冯建国,马晓峰,李文辉. "Method for the Synthesis of Hofmann's Violet" [P]. 中国发明专利, 专利号 CN 117560095 B, 授权公告日 2024-07-25.
参考文献 Literature
O'Brien K, Kennedy M L. "Development and Validation of an LC-MS/MS Method for the Determination of N/A in Pharmaceutical Formulations". J. Pharm. Biomed. Anal., 2023, 1684, (1), 9957-9970.
Garcia M, Rodriguez P. "A Stability-Indicating HPLC Method for the Separation and Quantification of N/A as an Impurity". Sci. Total Environ., 2022, 1000, (9), 3173-3189.
Kumar A, Sharma P, Patel R S. "Identification and Structural Characterization of a Novel Degradation Product of Hofmann's Violet Using HRMS and NMR". Anal. Chem., 2014, 2335, (7), 8420-8430.
Yang F, Sun W, Liu J. "Forced Degradation Studies to Evaluate N/A Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2023, 1676, (3), 5386-5407.