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  • Title: Isolation and characterization of the new purine 1,3, 7-trimethylisoguanine from the New Zealand ascidian Pseudodistoma cereum.
    Author: Copp BR, Wassvik CM, Lambert G, Page MJ.
    Journal: J Nat Prod; 2000 Aug; 63(8):1168-9. PubMed ID: 10978221.
    Abstract:
    The new purine 1,3,7-trimethylisoguanine (1) has been isolated from the ascidian Pseudodistoma cereum. The structure of 1 was elucidated by analysis of NMR spectroscopic and mass spectrometric data and by comparison with the regioisomeric purine 1,3,7-trimethylguanine (2).
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