Composition of Iridals, Unusual Triterpenoids from Sword-Lilies, and the Seasonal Dependence of Their Content in Various Parts of Different Iris Species

Abstract

Abstract The composition of iridals, new triterpenoids from sword-lilies, and their fatty acid esters in roots, rhizomes and leaves of I. germanica Linn., I. pseudacorus Linn, and two different varieties of I. pallida Lam. was determined. Quantitative analysis of their total content in the various parts of the plants in the course of the year showed specific seasonal changes in rhizomes and leaves. Based on these results the possible significance of these compounds for the plants is discussed.