(E/Z)-2-Propyl-2,4-pentadienoic Acid Ethyl Ester-d5 is the isotope labelled analog of (E/Z)-2-Propyl-2,4-pentadienoic Acid Ethyl Ester (P838340); the ethyl ester derivative of (E,Z)-2-Propyl-2,4-pentadienoic Acid (P838290) which is a metabolite of Valproic Acid (V094750).