![](http://www.alamy.com/thumbs/6/7E63C9C4-B100-40E1-8FFA-6D9164C58B67/2KFJ4MK.jpg)
3D image of Xanthine skeletal formula - molecular chemical structure of Purinedione isolated on white background
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Photo credit: © Kseniya-Omega / Alamy / Afripics
License: Royalty Free
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Keywords: 3d, acid, adenosine, asthma, base, biogenesis, bioprecursor, biosynthesis, biosynthetic, bronchodilator, caffeine, catabolism, component, compound, contractor, cycle, deaminase, degradation, derivative, dione, drug, endogenous, enzyme, guanine, hypoxanthine, influenza, inhibitor, intermediate, isomer, mechanism, metabolic, metabolism, metabolite, nucleoside, oxidoreductase, path, pathway, pesticide, phosphodiesterase, phosphorylase, precursor, production, purine, receptor, stereoisomer, stimulant, substance, substrate, synthesis, theobromine, theophylline, xanthic, xanthine, xanthosine