Cyclic hexapeptides of proline-ornithine-threonine-proline-threonine-serine. The cyclization with a single non-peptide bond can lead them to be incorrectly called DEPSIPEPTIDES, but the echinocandins lack ester links. Antifungal activity is via inhibition of 1,3-beta-glucan synthase production of BETA-GLUCANS.

Synonyms: Echinocandin, 0, Mulundocandins, Aculeacins, Aculeacin, Echinocandins, Pneumocandins, Pneumocandin