3-benzyl-2,2-dimethylpenta-3,4-dienal InChI=1/C14H16O/c1-4-13(14(2,3)11-15)10-12-8-6-5-7-9-12/h5-9,11H,1,10H2,2-3H benzenebutanal, beta-ethenylidene-alpha,alpha-dimethyl-