Anderson J P, Johnson M A, Schröder R. "一种的合成方法" [P]. US Patent, US 11258921 B2, 2018-05-01.
Schröder R, O'Brien P Q, Williams B T. "Method for the Synthesis of 4-(4-Hydroxy-phenylazo)benzoic acid ethyl ester" [P]. US Patent, US 11372188 B2, 2023-05-11.
发明人王建平,徐明华,韩伟. "A Process for Preparing High-Purity 4-(4-Hydroxy-phenylazo)benzoic acid ethyl ester" [P]. 中国发明专利, 专利号 CN 111944986 A, 授权公告日 2020-05-23.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Food Chem., 2022, 1025, 859-883.
Wang L, Li J, Zhang H. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Molecules, 2013, 314, (11), 8876-8897.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of 4-(4-Hydroxy-phenylazo)benzoic acid ethyl ester Using HRMS and NMR". Chromatographia, 2022, 412, 7792-7814.