La impureza 2-Oxoarginina | también referida como 5-carbamimidamido-2-oxopentanoic acid | 2-Oxo-5-guanidinovaleric acid o 5-[(diaminomethylidene)amino]-2-oxopentanoic acid | es un subproducto polar que puede formarse por oxidación o degradación de intermediarios guanidino durante síntesis y almacenamiento. Presenta elevada solubilidad en medios acuosos y comportamiento de retención temprano en cromatografías reversas | requiriendo técnicas LC-MS y RMN para su identificación confiable. Su presencia puede comprometer especificaciones de pureza y perfil de impurezas relacionadas | por lo que se controla mediante optimización de condiciones de reacción | purificación por intercambio iónico o cromatografía preparativa | y establecimiento de límites y pruebas de estabilidad en formulaciones.
Referencias
Silva, Siguara B. L., et al. “Insights into the Biosynthesis of Cyclic Guanidine Alkaloids from Crambeidae Marine Sponges.†Angewandte Chemie, vol. 131, no. 2, 6 Dec. 2018, pp. 530–535, 10.1002/ange.201809539. Accessed 27 Jan. 2022.
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