Impureza nitroso de Acalabrutinib 2 (S)-4-(8-amino-3-(1-nitrosopyrrolidin-2-yl)imidazo[1,5-a]pyrazin-1-yl)benzoic acid é uma impureza derivada com relevância analítica e regulatória em lotes de Acalabrutinib. Esta entidade nitrosa apresenta características estruturais que exigem monitoramento rigoroso no perfil de impurezas devido ao potencial de formação durante processos de síntese e armazenamento. A identificação e quantificação são realizadas por métodos analíticos validados como HPLC e LC-MS complementados por espectroscopia NMR para confirmação estrutural. Proporciona dados críticos para especificações, estudos de estabilidade e avaliação de risco de segurança, apoiando conformidade com requisitos de controle de qualidade e documentação regulatória.
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