Schröder R, O'Brien P Q, Kumar R. "一种的合成方法" [P]. US Patent, US 9005544 B2, 2019-05-02.
发明人郭海燕,张德明,罗永刚. "Method for the Synthesis of 3-Ethoxy-2-ethyl-N-(4-phenylbutyl)-2H-indazole-6-carboxamide" [P]. 中国发明专利, 专利号 CN 115037231 A, 授权公告日 2019-10-07.
发明人赵玉洁,黄志刚,钱学锋. "A Process for Preparing High-Purity 3-Ethoxy-2-ethyl-N-(4-phenylbutyl)-2H-indazole-6-carboxamide" [P]. 中国发明专利, 专利号 CN 109932214 A, 授权公告日 2016-12-18.
参考文献 Literature
Fischer P, Wagner E. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Phytochemistry, 2013, 553, 9468-9473.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2021, 592, 8483-8505.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of 3-Ethoxy-2-ethyl-N-(4-phenylbutyl)-2H-indazole-6-carboxamide Using HRMS and NMR". Biomed. Chromatogr., 2021, 1999, (1), 4362-4386.
O'Brien K, Kennedy M L. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Sci. Total Environ., 2022, 1371, (6), 2948-2972.