4-[(1E,3E)-hexa-1,3-dien-1-yl]cyclopentene InChI=1/C11H16/c1-2-3-4-5-8-11-9-6-7-10-11/h3-8,11H,2,9-10H2,1H3/b4-3+,8-5 cyclopentene, 4-[(1E,3E)-1,3-hexadienyl]-