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  • Title: 6-Methoxy-7-methyl-8-oxoguanine, an unusual purine from the ascidian Symplegma rubra.
    Author: Lindsay BS, Almeida AM, Smith CJ, Berlinck RG, da Rocha RM, Ireland CM.
    Journal: J Nat Prod; 1999 Nov; 62(11):1573-5. PubMed ID: 10579878.
    Abstract:
    A new purine derivative, 6-methoxy-7-methyl-8-oxoguanine (1), along with 8-oxoadenine (2) and the human metabolite 3-methylxanthine (3), has been isolated from the ascidian Symplegma rubra collected on the southeastern coastline of Brazil. The structures of the three purines were established by analysis of spectroscopic data.
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