purpurin

pur·pu·rin

noun \ˈpər-pyə-rən\

Definition of PURPURIN

1

: an orange or red crystalline compound C₁₄H₈O₅ obtained from madder root along with alizarin or by oxidation of alizarin and used in dyeing

2

also pur·pu·rine \-rən, -ˌrēn\ : any of various colored compounds obtained from chlorophyll or related compounds by the action of cold alcoholic alkali and oxygen