La impureza Isobutyl (S)-2-(2-oxopyrrolidin-1-yl)butanoate (CAS 2273884-56-1) es un contaminante quiral que incorpora un anillo lactama y un grupo ester isobutilo | cuyo perfil estructural puede influir en la pureza y estabilidad del lote; su presencia es relevante por posibles variaciones en la actividad y el perfil farmacocinético del material final. Desde el punto de vista analítico se caracteriza mediante técnicas como HPLC | LC-MS y RMN | y su identificación permite establecer límites de especificación y control de calidad. La evaluación de esta impureza es crítica para garantizar conformidad regulatoria y reproducibilidad en procesos de fabricación.
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