(E)-3-Bromo-4-oxo-4-(4-(pentyloxy)phenyl)-2-butenoic acid 2-BUTENOIC ACID, 3-BROMO-4-OXO-4-(4-(PENTYLOXY)PHENYL)-, (E)- 42241-78-1 BRN 2132369 NSC 172760 Penberol