Chen K W, Roberts E F, Yamamoto T. "Method for the Synthesis of Levosimendan Impurity 35" [P]. US Patent, US 11199193 B2, 2015-11-06.
Martínez F, Jørgensen K, Schröder R. "A Process for Preparing High-Purity Levosimendan Impurity 35" [P]. European Patent, EP 3970940 A1, 2022-01-23.
参考文献 Literature
Zhou X P, Huang L, Wu G. "Development and Validation of an LC-MS/MS Method for the Determination of 左西孟旦杂质35 in Pharmaceutical Formulations". Anal. Methods, 2017, 786, (1), 3516-3522.
Fischer P, Wagner E. "A Stability-Indicating HPLC Method for the Separation and Quantification of 左西孟旦杂质35 as an Impurity". J. Agric. Food Chem., 2018, 377, 396-408.
Yamamoto K, Tanaka H, Suzuki T. "Identification and Structural Characterization of a Novel Degradation Product of Levosimendan Impurity 35 Using HRMS and NMR". Food Chem., 2024, 1378, (3), 4828-4854.