1,5-Dimethyl 3-(2-methylpropyl)pentanedioate is an intermediate in the synthesis of (3S)?-3-?(2-Methylpropyl)?-pentanedioic Acid 1-Methyl Ester (Pregabalin Impurity 17, M199650), an impurity of Pregabalin (P704800), a GABA analogue used as an anticonvulsant.