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Xanthine - Wikipedia
Xanthine | C5H4N4O2 | CID 1188 - PubChem
Xanthine - an overview | ScienceDirect Topics
Xanthine Derivatives: Drug Class, Uses, Side Effects ... - RxList
Xanthine scaffold: scope and potential in drug development
Xanthine, xanthine derivatives, foods, medications & xanthine ...
Recent Advances in the Synthesis of Xanthines: A Short Review