La impureza Avermectina B1a Monosacárido (CAS 71831-09-9) se identifica como un derivado de desglycosilación que puede comprometer el perfil de pureza y la estabilidad del lote. Técnicamente se distingue por una masa molecular reducida en espectrometría de masas y un desplazamiento en tiempos de retención en HPLC frente al patrón B1a completo | además de señales específicas en RMN relacionadas con el fragmento monosacárido. Su presencia requiere control analítico riguroso mediante métodos validados como HPLC-UV | LC-MS/MS y confirmación por RMN | optimización de condiciones de almacenamiento y pasos de purificación para minimizar su formación y garantizar cumplimiento de especificaciones.
Referencias
Chen, Tom S., and Edward S. Inamine. “Studies on the Biosynthesis of Avermectins.†Archives of Biochemistry and Biophysics, vol. 270, no. 2, May 1989, pp. 521–25, https://doi.org/10.1016/0003-9861(89)90534-1.
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