XANTHINE
\zˈanθa͡ɪn], \zˈanθaɪn], \z_ˈa_n_θ_aɪ_n]\
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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)
By DataStellar Co., Ltd
By Daniel Lyons
By Henderson, I. F.; Henderson, W. D.
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Quinones
- Hydrocarbon rings which contain two moieties position. They can be substituted in any position except at the ketone groups.