Escitalopram Desfluoro Impurity (HBr salt), CAS 1346617-30-8, ist ein halogenarmer Strukturanalogon des SSRI Escitalopram mit der Formel C20H23BrN2O und einer Molekülmasse von 387.31. Das Hydrobromid bezeichnet die Protonierung der basischen Aminfunktion, während das Desfluoro-Motiv den Verlust des aromatischen Fluorsubstituenten während der Synthese oder einer nachfolgenden Umwandlung anzeigt. Solche Verunreinigungen entstehen typischerweise als prozessbedingte Nebenprodukte durch unvollständige Fluorierung, Fehlsubstitution am Aromaten oder Halogenaustausch. Die Bewertung erfolgt nach ICH Q3A/Q3B, und die Spurenbestimmung erfordert üblicherweise LC-MS/MS, LC-HRMS sowie orthogonale chromatographische Verfahren; NMR dient der Strukturverifikation.
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