Occurrence
Angelic acid occurs in the roots of many plants, especially of the family Apiaceae. These plants include Angelica archangelica, Peucedanum ostruthium (masterwort), Levisticum officinale (lovage), Euryangium Sumbul and Laserpitium latifolium. In the latter plant, it is present in the resin called laserpicium, and the oil of carrot also contains angelic acid. Sumbul plants might contain not angelic acid itself, but a larger complex which breaks into angelic acid upon processing. The acid can also be extracted from the oil of chamomile flowers, and 85% of Roman chamomile (Anthemis nobilis) oil consists of esters of angelic and tiglic acids; it also contains isobutyl angelate and amyl angelate. The acid content is highest in Angelica archangelica where it is about 0.3%.
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