La impureza Neomicina EP Impurity E (CAS 7542-37-2) | también identificada como Framycetin EP Impurity E y descrita como (5S | 6S | 9R)-5-Amino-6-(2 | 3-difluorofenil)-6 | 7 | 8 | 9-tetrahidro-5H-ciclohepta[b]piridin-9-il 4-(2-oxo-2 | 3-dihidro-1H-imidazo[4 | 5-b]piridin-1-il)piperidina-1-carboxilato | requiere control riguroso por su origen en rutas sintéticas y degradación durante almacenamiento. Su caracterización se realiza mediante HPLC con detección UV | LC-MS y espectroscopía NMR para confirmar estereoquímica y motivos funcionales. En control de calidad se establecen límites de especificación | estudios de estabilidad y procedimientos de purificación para minimizar su presencia y evaluar impacto en seguridad y pureza del API. La evaluación analítica avanzada permite diseño de estrategias de mitigación y cumplimiento de normas EP.
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