1,4-cycloheptadiene, 6-[(1E)-1-butenyl]- 6-[(1E)-but-1-en-1-yl]cyclohepta-1,4-diene InChI=1/C11H16/c1-2-3-8-11-9-6-4-5-7-10-11/h3-4,6-8,10-11H,2,5,9H2,1H3/b8-3