purinen.
英 'pjʊəriːn
中文n. [有化] 嘌呤（四氮杂茚，尿杂环）；咖啡碱
词根词源
purine (n.)1898, from German purin (Fischer), said to be from Latin purum, neuter of purus "clean, pure" (see pure) + Modern Latin uricum "uric acid" + chemical suffix -ine (2).
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