4-pentenoic acid, 2-ethyl-2-propyl-, methyl ester InChI=1/C11H20O2/c1-5-8-11(7-3,9-6-2)10(12)13-4/h5H,1,6-9H2,2-4H methyl 2-ethyl-2-propylpent-4-enoate