Abacavir EP Impurity F (CAS 1443421-68-8) es una impureza derivada t-butil del abacavir caracterizada por la sustitución tert-butoximetilo en el anillo ciclopenteno. Frecuentemente se genera durante etapas de protección/desprotección o por reacciones secundarias con agentes terc-butilo y puede aislarse y caracterizarse por HPLC-UV | LC-MS y RMN 1H/13C. Presenta propiedades fisicoquímicas que afectan el perfil de pureza y la estabilidad del principio activo | por lo que debe incluirse en el perfil de impurezas EP con estándares de referencia | factores de respuesta y límites aceptables; su monitoreo mediante métodos validados es clave para el control analítico y cumplimiento regulatorio.
Referencias
Vukkum, Pallavi. “Stress Degradation Behavior of Abacavir Sulfate and Development of a Suitable Stability-Indicating UHPLC Method for the Determination of Abacavir, Its Related Substances, and Degradation Products.” Scientia Pharmaceutica, vol. 80, no. 4, 2012, pp. 903–21, https://doi.org/10.3797/scipharm.1206-11.
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