purpurein
/ˈpəːpjʊrɪnɪn/ /ˈpəːpjʊrɪnʌɪn/(also purpureine) Chemistry
noun
1A glucoside extracted from the purple willow, Salix purpurea.
2An alkaloid extracted from the tropical American tree Annona purpurea (family Lauraceae) and various other plants, especially of the genus Thalictrum (family Ranunculaceae).
Origin
Mid 19th century (in an earlier sense). From classical Latin purpureus + -in, after orcein.