On the Structure of a New C-Glycosyl Flavone Embinin, Isolated from the Petals of Iris germanica Linnaeous

Abstract

In 1962, embinin (I), mp 180`1, was first isolated from the flowers of Iris tectorum Maxim.*2 (Iridaceae) by Hirose et al.,1) who proposed the formula C28H32O20,5H2O as a flavonol-di-rhamnoside. However, no isolation of its aglycon have been made.