Thompson G K, Roberts E F, Chen K W. "Method for the Synthesis of 2-Amino-5-(ethylsulfonyl)-4-methylthiophene-3-carbonitrile" [P]. US Patent, US 11095284 B2, 2023-06-14.
Schröder R, Johansson L, Björnsson E. "A Process for Preparing High-Purity 2-Amino-5-(ethylsulfonyl)-4-methylthiophene-3-carbonitrile" [P]. European Patent, EP 3356387 A1, 2021-01-01.
参考文献 Literature
Brown R C, Davis S M. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Biomed. Chromatogr., 2020, 2114, 9199-9217.
Kim S H, Park J Y. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Chromatographia, 2020, 937, (2), 9188-9218.
Zhang Y, Li Q, Chen T. "Identification and Structural Characterization of a Novel Degradation Product of 2-Amino-5-(ethylsulfonyl)-4-methylthiophene-3-carbonitrile Using HRMS and NMR". Talanta, 2021, 1370, (4), 2584-2593.