Enniatin
Enniatins are a class of organic chemical compounds found in "Fusarium" fungi. They appear in nature as mixtures of cyclic depsipeptides. The main variants are enniatin A, A1, B and B1 together with minor amounts of enniatin C, D, E and F. The enniatins act as ionophores that bind ammonium, and they have been proposed as replacements for nonactin in specific ammonium-based electrodes. Enniatins have been also mentioned as potential anti-AIDS drugs.