 Angelic acid esters are the active components of herbal medicine used against a wide range of various health disturbances including pains, fever, gout, heartburn, etc.Angelic acid was first isolated by the German pharmacist Ludwig Andreas Buchner (1813–1897) in 1842 from the roots of the garden plant angelica ("Angelica archangelica") that gave the acid its name.Angelic acid occurs in the roots of many plants, especially of the family Apiaceae.