Chen K W, Park J H, Yamamoto T. "一种N/A的合成方法" [P]. US Patent, US 9652497 B2, 2016-03-18.
发明人黄志刚,周伟,沈红梅. "Method for the Synthesis of Dicyclohexylamine Na-(tert-butoxycarbonyl)-1-(mesitylsulfonyl)-L-tryptophanate" [P]. 中国发明专利, 专利号 CN 114270528 B, 授权公告日 2025-06-06.
O'Brien P Q, Kumar R, Chen K W. "A Process for Preparing High-Purity Dicyclohexylamine Na-(tert-butoxycarbonyl)-1-(mesitylsulfonyl)-L-tryptophanate" [P]. US Patent, US 10745667 B2, 2020-01-20.
参考文献 Literature
Lee J H, Choi Y S. "Development and Validation of an LC-MS/MS Method for the Determination of N/A in Pharmaceutical Formulations". Biomed. Chromatogr., 2025, 889, (6), 4864-4871.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of N/A as an Impurity". Phytochemistry, 2024, 2385, 9797-9818.
Kowalski T, Nowak Z. "Identification and Structural Characterization of a Novel Degradation Product of Dicyclohexylamine Na-(tert-butoxycarbonyl)-1-(mesitylsulfonyl)-L-tryptophanate Using HRMS and NMR". J. Agric. Food Chem., 2012, 1530, (9), 3249-3272.
O'Brien K, Kennedy M L. "Forced Degradation Studies to Evaluate N/A Profile in Drug Substances According to ICH Guidelines". J. Pharm. Biomed. Anal., 2025, 1986, (12), 4591-4605.