Thompson G K, Fischer A B, Johnson M A. "Method for the Synthesis of Avacopan Impurity 9" [P]. US Patent, US 9666176 B2, 2017-10-19.
Patel M V, Schröder R, Stevens L M. "A Process for Preparing High-Purity Avacopan Impurity 9" [P]. US Patent, US 10881890 B2, 2016-10-27.
参考文献 Literature
Kumar A, Sharma P, Patel R S. "Development and Validation of an LC-MS/MS Method for the Determination of 阿伐可泮杂质9 in Pharmaceutical Formulations". Anal. Methods, 2018, 374, (7), 8431-8445.
Martinez C, Lopez D R. "A Stability-Indicating HPLC Method for the Separation and Quantification of 阿伐可泮杂质9 as an Impurity". Molecules, 2012, 1079, 5173-5179.
O'Brien K, Kennedy M L. "Identification and Structural Characterization of a Novel Degradation Product of Avacopan Impurity 9 Using HRMS and NMR". Chemosphere, 2015, 820, (4), 5767-5773.
Zhang Y, Li Q, Chen T. "Forced Degradation Studies to Evaluate 阿伐可泮杂质9 Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2018, 2332, (4), 1660-1679.