Martínez F, Nowak P, Kowalski A. "Method for the Synthesis of 4-(2-(5-(3,3-Dimethyl-1-(6-oxo-6-((2-oxopyrrolidin-1-yl)oxy)hexyl)indolin-2-ylidene)penta-1,3-dien-1-yl)-3,3-dimethyl-3H-indol-1-ium-1-yl)butane-1-sulfonate" [P]. European Patent, EP 3473234 A1, 2017-01-22.
发明人李文辉,沈红梅,唐晓军. "A Process for Preparing High-Purity 4-(2-(5-(3,3-Dimethyl-1-(6-oxo-6-((2-oxopyrrolidin-1-yl)oxy)hexyl)indolin-2-ylidene)penta-1,3-dien-1-yl)-3,3-dimethyl-3H-indol-1-ium-1-yl)butane-1-sulfonate" [P]. 中国发明专利, 专利号 CN 110618321 A, 授权公告日 2023-09-24.
参考文献 Literature
Mueller T, Schmidt R K. "Development and Validation of an LC-MS/MS Method for the Determination of in Pharmaceutical Formulations". Phytochemistry, 2025, 1844, 8273-8301.
Smith J A, Johnson M B. "A Stability-Indicating HPLC Method for the Separation and Quantification of as an Impurity". Sci. Total Environ., 2016, 2360, (4), 754-769.
Wang L, Li J, Zhang H. "Identification and Structural Characterization of a Novel Degradation Product of 4-(2-(5-(3,3-Dimethyl-1-(6-oxo-6-((2-oxopyrrolidin-1-yl)oxy)hexyl)indolin-2-ylidene)penta-1,3-dien-1-yl)-3,3-dimethyl-3H-indol-1-ium-1-yl)butane-1-sulfonate Using HRMS and NMR". Anal. Methods, 2011, 2479, 9588-9615.
Garcia M, Rodriguez P. "Forced Degradation Studies to Evaluate Profile in Drug Substances According to ICH Guidelines". Chemosphere, 2021, 112, 7011-7040.