1552-94-9 2,4-Pentadienoic acid, 5-phenyl- 2,4-Pentadienoic acid, 5-phenyl- (VAN) (8CI)(9CI) 5-Phenyl-2,4-pentadienoic acid 5-Phenylpenta-2,4-dienoic acid EINECS 216-298-2 NSC 109408 NSC 1778 NSC 63972 beta-Styrylacrylic acid