Echinocandin B a natural lipopeptide antifungal agent. Discovered in 1974 in Germany, it is the first of its class of antifungals called echinocandins. Echinocandin B is a cyclic hexapeptide with a linoleolyl side chain. Anidulafungin is synthesized from Echinocandin B. Echinocandin B is soluble in ethanol, methanol, DMSO and DMF.