Nielsen H, Kowalski A, Johansson L. "一种的合成方法" [P]. European Patent, EP 3266868 A1, 2018-12-21.
Brown S R, Yamamoto T, Kumar R. "Method for the Synthesis of tert-Butyl 7-(2-aminoethyl)-2-ethyl-6,7-dihydro-2H-pyrazolo[4,3-c]pyridine-5(4H)-carboxylate" [P]. US Patent, US 9302349 B2, 2017-04-08.
Johnson M A, Anderson J P, Brown S R. "A Process for Preparing High-Purity tert-Butyl 7-(2-aminoethyl)-2-ethyl-6,7-dihydro-2H-pyrazolo[4,3-c]pyridine-5(4H)-carboxylate" [P]. US Patent, US 11660752 B2, 2023-04-16.
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". J. Nat. Prod., 2023, 1173, (12), 5249-5260.
Mueller T, Schmidt R K. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Anal. Chim. Acta, 2021, 2357, 5275-5301.
Smith J A, Johnson M B. "Identification and Structural Characterization of a Novel Degradation Product of tert-Butyl 7-(2-aminoethyl)-2-ethyl-6,7-dihydro-2H-pyrazolo[4,3-c]pyridine-5(4H)-carboxylate Using HRMS and NMR". Anal. Chem., 2018, 347, 5760-5764.