Abemaciclib Impurity 2 (CAS 1038408-36-4) es una impureza relacionada estructuralmente con Abemaciclib | identificada como 6-bromo-1-isopropil-2-metil-1H-benzimidazol y variantes nomenclaturales equivalentes. Debido a su bromoarila y sustituciones isopropil y metilo | presenta propiedades físicas y de retención que requieren métodos analíticos robustos para su detección y cuantificación | como HPLC con detección PDA | LC-MS y espectroscopía NMR para confirmación estructural. Su control es crítico en la liberación de materia prima y principios activos | estableciendo límites en especificación | estudios de degradación y desarrollo de estándares de referencia para garantizar cumplimiento regulatorio y calidad del producto final.
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