Leaf coumarins of <i>Angelica</i><i>archangelica</i>

Abstract

Coumarin derivatives are abundant in leaves of Angelicaarchangelica, and differ in kind from those of the roots. Angelicin, bergapten, imperatorin, isopimpinellin, xanthotoxin, oxypeucedanin, and five unidentified coumarins were isolated from leaves. A time study of their development was carried out. Methods for the isolation of leaf neutral coumarins are described.