2,3-BUTADIENOIC ACID,4-PHENYL 2,3-butadienoic acid, 4-phenyl- 4-phenylbuta-2,3-dienoic acid InChI=1/C10H8O2/c11-10(12)8-4-7-9-5-2-1-3-6-9/h1-3,5-8H,(H,11,12