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Twelve purines oxidized with 4,5-dimethyl-o-phenylenediamine (DMPD) was found to react with N-bromosuccinimide (NBS) to give fluorescent derivatives. In this paper, the identification of oxidation and fluorescent products have been described. In compliance with the substituent on purine skelton, three alloxans were obtained from twelve purines after oxidation by using NBS. The three alloxans reacted with DMPD to form two quinoxalines and an alloxazine, all of which being fluorescent.

Products in the Fluorometric Reaction of Purines with 4, 5-Dimethyl-o-phenylenediamine after Oxidation Using N-Bromosuccinimide