pur·pu·rin noun \ˈpər-pyə-rən\
: an orange or red crystalline compound C14H8O5 obtained from madder root along with alizarin or by oxidation of alizarin and used in dyeing
also pur·pu·rine \-rən, -ˌrēn\ (audio pronunciation) : any of various colored compounds obtained from chlorophyll or related compounds by the action of cold alcoholic alkali and oxygen
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