purine
noun
- a colorless, crystalline organic compound, CHN, the parent substance of the uric-acid group of compounds
- any of several basic substances produced by the decomposition of nucleoproteins and having a purine-type molecule, as caffeine, adenine, or guanine
See purine in American Heritage Dictionary 4
(pyo͝orˈēnˌ)
noun- A double-ringed, crystalline organic base, C5H4N4, not known to occur naturally, from which is derived the nitrogen bases adenine and guanine, as well as uric acid as a metabolic end product.
- Any of a group of organic compounds structurally related to purine, particularly adenine and guanine, and also caffeine, uric acid, theobromine, and theophylline.
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