Johansson L, Mueller T C, Rossi M. "Method for the Synthesis of 1-Butyl-3-(1-ethynylcyclohexyl)urea" [P]. European Patent, EP 3708456 A1, 2017-05-03.
Kowalski A, Schröder R, Lefèvre J P. "A Process for Preparing High-Purity 1-Butyl-3-(1-ethynylcyclohexyl)urea" [P]. European Patent, EP 3718724 A1, 2016-08-18.
参考文献 Literature
Yang F, Sun W, Liu J. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Food Chem., 2020, 1504, 7570-7597.
Lee J H, Choi Y S. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Rapid Commun. Mass Spectrom., 2023, 2461, (7), 6172-6192.
Fischer P, Wagner E. "Identification and Structural Characterization of a Novel Degradation Product of 1-Butyl-3-(1-ethynylcyclohexyl)urea Using HRMS and NMR". Anal. Chim. Acta, 2019, 157, (1), 8420-8432.
Kim S H, Park J Y. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". J. Chromatogr. A, 2025, 1290, 1364-1381.