2,4-pentadienoic acid, 5-phenyl-, ethyl ester InChI=1/C13H14O2/c1-2-15-13(14)11-7-6-10-12-8-4-3-5-9-12/h3-11H,2H2,1H3/b10-6+,11-7 ethyl 5-phenylpenta-2,4-dienoate