AntibioticX 206; Antibiotic C 41; Ionophore X 206; Stereoisomer of6-[3-[6-[[6-[[5'-(6-ethyltetrahydro-5-hydroxy-5-methyl-2H-pyran-2-yl)octahydro-2'-hydroxy-2,3',5'-trimethyl[2,2'-bifuran]-5-yl]hydroxymethyl]tetrahydro-6-hydroxy-3,5-dimethyl-2H-pyran-2-yl]methyl]tetrahydro-6-hydroxy-5-methyl-2H-pyran-2-yl]-2-hydroxybutyl]tetrahydro-a,3-dimethyl-2H-pyran-2-aceticacid; X 206