 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%.Angelic acid is a volatile solid with a biting taste and pungent sour odor.