La impureza deuterada N-(1-(3-chlorophenyl-2 | 4 | 5 | 6-d4)-1-oxopropan-2-yl-3 | 3 | 3-d3)-N-(2-(methyl-d3)propan-2-yl-1 | 1 | 1 | 3 | 3 | 3-d6)nitrous amide es un contaminante de naturaleza isotópica con múltiples sustituciones deuteradas que provoca desplazamientos de masa predecibles y modifica los patrones RMN | lo que la hace crítica en controles de calidad isotópica. Su identificación se realiza mediante espectrometría de masas de alta resolución HRMS y análisis LC-MS | complementados con RMN deuterio y protones para confirmar el grado de sustitución. Presenta polaridad y solubilidad cercanas al compuesto principal | lo que complica su separación y exige métodos cromatográficos optimizados y protocolos de almacenamiento anhidro y a baja temperatura para garantizar estabilidad.
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