Nowak P, Sørensen M, Schröder R. "Method for the Synthesis of 2-Mercapto-7,7-dimethyl-7,8-dihydro-5H-pyrano[4,3-b]pyridine-3-carbonitrile" [P]. European Patent, EP 3255038 A1, 2015-05-15.
Nielsen H, Mueller T C, Björnsson E. "A Process for Preparing High-Purity 2-Mercapto-7,7-dimethyl-7,8-dihydro-5H-pyrano[4,3-b]pyridine-3-carbonitrile" [P]. European Patent, EP 3166549 A1, 2022-11-07.
参考文献 Literature
Yamamoto K, Tanaka H, Suzuki T. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Anal. Chem., 2011, 596, 9603-9607.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Phytochemistry, 2017, 238, 9616-9633.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of 2-Mercapto-7,7-dimethyl-7,8-dihydro-5H-pyrano[4,3-b]pyridine-3-carbonitrile Using HRMS and NMR". J. Nat. Prod., 2019, 1969, (7), 1567-1576.
Kumar A, Sharma P, Patel R S. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Environ. Sci. Technol., 2019, 2157, (8), 9250-9256.