Thompson G K, O'Brien P Q, Fischer A B. "Method for the Synthesis of Clonazepam Impurity 21" [P]. US Patent, US 9510277 B2, 2025-11-26.
参考文献 Literature
Yang F, Sun W, Liu J. "Development and Validation of an LC-MS/MS Method for the Determination of 氯硝西泮杂质21 in Pharmaceutical Formulations". Phytochemistry, 2011, 746, 8905-8935.
Brown R C, Davis S M. "A Stability-Indicating HPLC Method for the Separation and Quantification of 氯硝西泮杂质21 as an Impurity". Food Chem., 2016, 653, (10), 9014-9022.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of Clonazepam Impurity 21 Using HRMS and NMR". J. Sep. Sci., 2013, 2044, (5), 3509-3513.
Kumar A, Sharma P, Patel R S. "Forced Degradation Studies to Evaluate 氯硝西泮杂质21 Profile in Drug Substances According to ICH Guidelines". Anal. Methods, 2012, 1064, 5265-5289.