Regorafenib N-óxido (CAS 835621-11-9) es una impureza oxidativa relevante en el desarrollo y control de calidad del principio activo Regorafenib. Se origina por oxidación del átomo de nitrógeno durante síntesis | formulación o metabolismo in vitro | y puede afectar perfiles de pureza y estabilidad. Su detección y cuantificación requieren métodos analíticos sensibles como LC-MS y HPLC con detección UV o MS | junto a estudios de degradación forzada para definir límites. El control incluye optimización de condiciones de síntesis | uso de agentes antioxidantes y especificaciones analíticas apropiadas para asegurar cumplimiento regulatorio y minimizar riesgos toxicológicos asociados a subproductos oxidados.
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