(2E)-2-Propyl-2-pentenoic acid (E)-2-en-VPA 2-En-valproic acid 2-Pentenoic acid, 2-propyl-, (E)- 33786-47-9 E-2-en-Valproic acid Valeric acid, 2-propylidene-, (E)- delta-2(E)-Valproate trans-2-Ene-valproic acid trans-2-Propyl-2-pentenoic acid