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en:xanthine [2013/01/31 14:38] (current)
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 +A purine base found in most body tissues and fluids, certain plants, and some urinary calculi. It is an intermediate in the degradation of adenosine monophosphate to uric acid, being formed by oxidation of [[hypoxanthine]]. The methylated xanthine compounds [[caffeine]],​ [[theobromine]],​ and [[theophylline]] and their derivatives are used in medicine for their bronchodilator effects. (Dorland, 28th ed) (MeSH: [[MeSH>​68019820]])