3-Methylphosphinicopropionic Acid Diethyl Ester is a derivative of 3-Methylphosphinicopropionic Acid Sodium Salt (M326160), a metabolite of Glufosinate (G596950). 3-Methylphosphinicopropionic Acid Diethyl Ester is used in the preparation of the naturally occurring amino acid, Phosphinothricin.