Phosphonic acid, (fluoroMethylene)bis-, tetraethyl ester Monofluoromethylenediphosphonate Tetraethylfluoromethylene-diphosphonate [fluoro(phosphonato)methyl]-dioxido-oxophosphorane Phosphonic acid, P,P'-(fluoromethylene)bis-, P,P,P',P'-tetraethyl ester Tetraethyl Fluoromethylenebisphosphonate