2,6-Dibromo-4-cyanophenyl butyrate 3861-41-4 BRN 2742676 Bromoxynil butyrate Butanoic acid, 2,6-dibromo-4-cyanophenyl ester Butyric acid, ester with 3,5-dibromo-4-hydroxybenzonitrile Caswell No. 119E EINECS 223-374-9 EPA Pesticide Chemical Code 035303