Image: Purine structure
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Description: Chemical structure of purine, a simple aromatic ring
Title: Purine structure
Credit: This image of a simple structural formula is ineligible for copyright and therefore in the public domain, because it consists entirely of information that is common property and contains no original authorship. čeština | Deutsch | English | español | suomi | français | italiano | 日本語 | македонски | മലയാളം | Nederlands | polski | português | русский | svenska | ไทย | 中文 | 中文（繁體） | 中文（简体） | українська | +/−
Author: Own
Usage Terms: Public domain
License: Public domain
Attribution Required?: No
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