rac 2-Isopropyl Pentanoic Acid Methyl Ester-d3 is the isotope labelled analog of rac 2-Isopropyl Pentanoic Acid Methyl Ester (I872955); the methyl ester derivative of rac 2-Isopropyl Pentanoic Acid (I872870) which is a constitutional isomer of Valproic Acid (V094750), a potent anticonvulsant.