(2E)-4-(4-tert-butylphenyl)-4-oxobut-2-enoic acid 2-butenoic acid, 4-[4-(1,1-dimethylethyl)phenyl]-4-oxo-, (2E)- InChI=1/C14H16O3/c1-14(2,3)11-6-4-10(5-7-11)12(15)8-9-13(16)17/h4-9H,1-3H3,(H,16,17)/b9-8