2-[5-Ethyltetrahydro-5-[tetrahydro-3-methyl-5-[tetrahydro-6-hydroxy-6-(hydroxymethyl)-3,5-dimethyl-2H-pyran-2-yl]-2-furyl]-2-furyl]-9-hydroxy-β-methoxy-α,γ,2,8-tetramethyl-1,6-dioxaspiro[4.5]decane-7-butyric Acid Methyl Ester; Monensin 1,6-Dioxaspiro[4.5]decane Deriv.; Methyl Monensin; Monensin A Methyl Este

A polyether ionophore antibiotic. Widely used in ion selective electrodes. Monensin Methyl Ester is a neutral analog of monensin. An Ionophore. Also, it has the ability to complex formation with divalent cations which was studied by the ESI mass spectrometry and PM5 semiempirical calculation.