19488-17-6 2(or 3)-BUTENOIC ACID, 3-METHYL-4-PHENYL- 3-Methyl-4-phenyl-2(or 3)-butenoic acid 3-Methyl-4-phenyl-3-butenoic acid 6052-53-5 Benzalbutyric acid EINECS 227-963-1 beta-Benzalbutyrate beta-Benzalbutyric acid beta-Benzylidenebutyric acid