Impureza N-formil de vareniclina (CAS 796865-82-2) | conocida por su nombre sistemático 5 | 8 | 14-triazatetracíclico 14-carbaldehído | es un subproducto de síntesis que altera la pureza y perfil impurezas del ingrediente farmacéutico activo; requiere estrecho control analítico por su presencia residual. Su identificación se realiza mediante HPLC con detección UV | LC-MS para determinación de masa y RMN para confirmación estructural. Se origina por formilación no deseada o degradación en condiciones ácidas o en presencia de agentes formilantes. Las estrategias de control incluyen optimización de la ruta sintética | pasos de purificación específicos y métodos de ensayo validados con estándares de referencia.
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