Iphiona aucheri is responsible for poisoning racing camels (Camelus dr
omedarius) in the United Arab Emirates U. A. E. Terpenoids, a non-toxi
c pyrrolizidine alkaloid and two diterpene glycosides, atractyloside a
nd carboxyatractyloside, were isolated and their structures determined
by spectroscopic methods. Atractyloside and carboxyatractyloside were
identified as the toxic principle of the plant.