rubianin
/ˌruːbɪˈanɪn/(also rubianine) Chemistry. Now historical and rare
noun
A yellow crystalline glycoside isolated from madder root.
- Investigation of Schunck's original samples in the 1970s showed that rubianin is a phenolic glycoside of anthraquinone, C25H26O13..
Origin
Mid 19th century. From rubian + -in.