Impureza de Valsartán 17 | N-((2′-(1H-tetrazol-5-yl)-[1 | 1′-biphenyl]-4-yl)(azido)methyl)-N-pentanoyl-L-valina | es un subproducto estructural que incorpora un grupo azido unido a un fragmento tetrazólico y bifenílico; su presencia refleja rutas de reacción incompletas o reacciones secundarias en la etapa de N-acilación o introducción del grupo tetrazol. Desde el punto de vista analítico se caracteriza y cuantifica por HPLC con detección UV | LC-MS y RSMN para confirmación estructural y masa exacta. Su control exige optimización del proceso | purificaciones específicas y evaluación conforme a límites regulatorios aplicables por su reactividad potencial y necesidad de calificación dentro del perfil de impurezas del API.
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![(1-(2'-(1-Nitroso-1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)-2-oxohexyl)-L-valine](https://veeprho.com/wp-content/uploads/2022/07/1-2-1-Nitroso-1H-tetrazol-5-yl-11-biphenyl-4-yl-2-oxohexyl-L-valine-1.png "(1-(2'-(1-Nitroso-1H-tetrazol-5-yl)-[1,1'-biphenyl]-4-yl)-2-oxohexyl)-L-valine")
