Abstract
□ Preparations of viral RNA inactivator(s) produced during the cupric ion-catalyzed oxidation of hydroquinone were analyzed by high-performance liquid chromatography (HPLC) using UV and electrochemical (EC) detectors. In addition to hydroquinone and the main oxidation product (p-benzoquinone), which is known not to be the inactivator(s), the analysis showed three unidentified components (I–III). Partial UV absorption spectra of I–III were determined by HPLC with the UV detector set at various wavelengths. Components II and III, but not I, were highly unstable in the presence of L-histidine, which is an excellent chelator of cupric ion and can promptly stop ongoing viral RNA inactivation by the inactivator(s). The product p-benzoquinone was also highly unstable in the presence of L-histidine; the reaction between these two compounds (with or without copper) resulted in a cascade of products. The possibility that the inactivator(s) is II or III, or both, is discussed.
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