O dímero etileno de prucaloprida é uma impureza dimérica relacionada ao processo, associada à prucaloprida, cuja formação é compatível com acoplamento mediado por etileno ou sobreralquilação durante a síntese. A estrutura, a fórmula C34H50Cl2N6O6 e a massa molecular de 709,7 g/mol indicam um derivado de amina terciária clorada e polifuncional, e não um degradante volátil. Sua avaliação insere-se no perfil de impurezas segundo ICH Q3A e, quando aplicável, na qualificação toxicológica conforme os princípios de ICH M7. Devido à polaridade e à massa, a detecção geralmente exige LC-MS/MS ou LC-MS de alta resolução, com LC-UV como técnica ortogonal de confirmação cromatográfica.
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