Phenylephrine 4 | 8 Isoquinoline Analog (CAS 23824-25-1) | conocido como Phenylephrine Impurity 11 | es una impureza estructural detectada en procesos de síntesis de fenilefrina que requiere atención en control de calidad. Se caracteriza mediante RMN | ESI-MS y cromatografía HPLC | proporcionando tiempos de retención y patrones de fragmentación que facilitan su identificación y cuantificación en niveles traza. Su origen suele asociarse a rutas secundarias de ciclización o reacciones laterales durante la síntesis y su presencia puede comprometer pureza y estabilidad del producto final. Es necesario definir límites en especificaciones | implementar métodos analíticos validados y estrategias de control en proceso para minimizar su formación y garantizar conformidad regulatoria.
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