3-Methyl-2-phenyl-crotonic acid 4-09-00-02086 (Beilstein Handbook Reference) 4412-08-2 BRN 1937711 Benzeneacetic acid, alpha-(1-methylethylidene)- (9CI) CROTONIC ACID, 3-METHYL-2-PHENYL- beta,beta-Dimethylatropic acid