Vareniclina N-óxido (CAS 2306217-12-7) es una impureza de oxidación relevante para el control de calidad del principio activo; su formación suele originarse por oxidación de la función amina durante síntesis | purificación o almacenamiento y puede afectar pureza y estabilidad del lote. Su evaluación exige métodos analíticos sensibles y específicos como HPLC con detección UV acoplado a LC-MS/MS para identificación y cuantificación | además de confirmación estructural por RMN y HRMS. La estrategia de control incluye estudios de degradación forzada | límites en especificación basados en ICH Q3A/Q3B | validación de métodos y medidas preventivas en procesado y envasado para minimizar su presencia.
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