N-(1-(3-clorofenil-2 | 4 | 5 | 6-d4)-1-oxopropan-2-yl-3 | 3 | 3-d3)-N-(2-(metil-d3)propan-2-yl-1 | 1 | 1 | 3 | 3 | 3-d6)nitrous amida é uma impureza isotópica caracterizada por deuteração extensa no anel aromático e nos grupos alquila | resultando em deslocamentos de massa e alterações no padrão de fragmentação em espectrometria de massas. Apresenta comportamento cromatográfico diferenciado devido a efeitos isotópicos cinéticos | exigindo ajustes em métodos HPLC e validação de coeluição. A quantificação requer RMN 2H ou HRMS com verificação da pureza isotópica e do perfil de impurezas relacionadas. Informações sobre estabilidade | possíveis vias de formação durante a síntese e limites de aceitação são essenciais para controle de qualidade e conformidade regulatória.
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