127759-24-4 CP 84657 CP-84,657 Monensin, 21,25-deepoxy-25-de(hydroxymethyl)-21,24-epoxy-25-ethyl-21-hydroxy-8-methyl-7-O-methyl-14-((tetrahydro-5-methoxy-6-methyl-2H-pyran-2-yl)oxy)-, (8R,14R(2S,5S,6R),21S,24S,25R)-